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diff --git a/doc/Clusters_from_Scratch/en-US/Ch-Active-Active.txt b/doc/Clusters_from_Scratch/en-US/Ch-Active-Active.txt
new file mode 100644
index 0000000000..8488371e08
--- /dev/null
+++ b/doc/Clusters_from_Scratch/en-US/Ch-Active-Active.txt
@@ -0,0 +1,841 @@
+= Conversion to Active/Active =
+
+== Requirements ==
+
+The primary requirement for an Active/Active cluster is that the data
+required for your services is available, simultaneously, on both
+machines. Pacemaker makes no requirement on how this is achieved, you
+could use a SAN if you had one available, however since DRBD supports
+multiple Primaries, we can also use that.
+
+The only hitch is that we need to use a cluster-aware filesystem. The
+one we used earlier with DRBD, ext4, is not one of those. Both OCFS2
+and GFS2 are supported, however here we will use GFS2 which comes with
+Fedora 13.
+
+We'll also need to use CMAN for Cluster Membership and Quorum instead
+of our Corosync plugin.
+
+
+== Adding CMAN Support ==
+
+http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html-single/Cluster_Suite_Overview/index.html#s2-clumembership-overview-CSO[CMAN v3] is a Corsync plugin that monitors the names and number of active
+cluster nodes in order to deliver membership and quorum information to
+clients (such as the Pacemaker daemons).
+
+In a traditional Corosync-Pacemaker cluster, a Pacemaker plugin is
+loaded to provide membership and quorum information. The motivation
+for wanting to use CMAN for this instead, is to ensure all elements of
+the cluster stack are making decisions based on the same membership
+and quorum data.
+footnote:[A failure to do this can lead to what is called internal
+split-brain - a situation where different parts of the stack disagree
+about whether some nodes are alive or dead - which quickly leads to
+unnecssary down-time and/or data corruption.]
+
+In the case of GFS2, the key pieces are the dlm_controld and
+gfs_controld helpers which act as the glue between the filesystem and
+the cluster software. Supporting CMAN enables us to use the versions
+already being shipped by most distributions (since CMAN has been
+around longer than Pacemaker and is part of the Red Hat cluster
+stack).
+
+[WARNING]
+=========
+Ensure Corosync and Pacemaker are stopped on all nodes before continuing
+=========
+
+[WARNING]
+=========
+Be sure to disable the Pacemaker plugin before continuing with this
+section. In most cases, this can be achieved by removing
+/etc/corosync/service.d/pcmk and stopping Corosync.
+=========
+
+
+=== Installing the required Software ===
+
+[source,Bash]
+-----
+# yum install -y cman gfs2-utils gfs2-cluster
+Loaded plugins: auto-update-debuginfo
+Setting up Install Process
+Resolving Dependencies
+--> Running transaction check
+---> Package cman.x86_64 0:3.1.7-1.fc15 will be installed
+--> Processing Dependency: modcluster >= 0.18.1-1 for package: cman-3.1.7-1.fc15.x86_64
+--> Processing Dependency: fence-agents >= 3.1.5-1 for package: cman-3.1.7-1.fc15.x86_64
+--> Processing Dependency: openais >= 1.1.4-1 for package: cman-3.1.7-1.fc15.x86_64
+--> Processing Dependency: ricci >= 0.18.1-1 for package: cman-3.1.7-1.fc15.x86_64
+--> Processing Dependency: libSaCkpt.so.3(OPENAIS_CKPT_B.01.01)(64bit) for package: cman-3.1.7-1.fc15.x86_64
+--> Processing Dependency: libSaCkpt.so.3()(64bit) for package: cman-3.1.7-1.fc15.x86_64
+---> Package gfs2-cluster.x86_64 0:3.1.1-2.fc15 will be installed
+---> Package gfs2-utils.x86_64 0:3.1.1-2.fc15 will be installed
+--> Running transaction check
+---> Package fence-agents.x86_64 0:3.1.5-1.fc15 will be installed
+--> Processing Dependency: /usr/bin/virsh for package: fence-agents-3.1.5-1.fc15.x86_64
+--> Processing Dependency: net-snmp-utils for package: fence-agents-3.1.5-1.fc15.x86_64
+--> Processing Dependency: sg3_utils for package: fence-agents-3.1.5-1.fc15.x86_64
+--> Processing Dependency: perl(Net::Telnet) for package: fence-agents-3.1.5-1.fc15.x86_64
+--> Processing Dependency: /usr/bin/ipmitool for package: fence-agents-3.1.5-1.fc15.x86_64
+--> Processing Dependency: perl-Net-Telnet for package: fence-agents-3.1.5-1.fc15.x86_64
+--> Processing Dependency: pexpect for package: fence-agents-3.1.5-1.fc15.x86_64
+--> Processing Dependency: pyOpenSSL for package: fence-agents-3.1.5-1.fc15.x86_64
+--> Processing Dependency: python-suds for package: fence-agents-3.1.5-1.fc15.x86_64
+---> Package modcluster.x86_64 0:0.18.7-1.fc15 will be installed
+--> Processing Dependency: oddjob for package: modcluster-0.18.7-1.fc15.x86_64
+---> Package openais.x86_64 0:1.1.4-2.fc15 will be installed
+---> Package openaislib.x86_64 0:1.1.4-2.fc15 will be installed
+---> Package ricci.x86_64 0:0.18.7-1.fc15 will be installed
+--> Processing Dependency: parted for package: ricci-0.18.7-1.fc15.x86_64
+--> Processing Dependency: nss-tools for package: ricci-0.18.7-1.fc15.x86_64
+--> Running transaction check
+---> Package ipmitool.x86_64 0:1.8.11-6.fc15 will be installed
+---> Package libvirt-client.x86_64 0:0.8.8-7.fc15 will be installed
+--> Processing Dependency: libnetcf.so.1(NETCF_1.3.0)(64bit) for package: libvirt-client-0.8.8-7.fc15.x86_64
+--> Processing Dependency: cyrus-sasl-md5 for package: libvirt-client-0.8.8-7.fc15.x86_64
+--> Processing Dependency: gettext for package: libvirt-client-0.8.8-7.fc15.x86_64
+--> Processing Dependency: nc for package: libvirt-client-0.8.8-7.fc15.x86_64
+--> Processing Dependency: libnuma.so.1(libnuma_1.1)(64bit) for package: libvirt-client-0.8.8-7.fc15.x86_64
+--> Processing Dependency: libnuma.so.1(libnuma_1.2)(64bit) for package: libvirt-client-0.8.8-7.fc15.x86_64
+--> Processing Dependency: libnetcf.so.1(NETCF_1.2.0)(64bit) for package: libvirt-client-0.8.8-7.fc15.x86_64
+--> Processing Dependency: gnutls-utils for package: libvirt-client-0.8.8-7.fc15.x86_64
+--> Processing Dependency: libnetcf.so.1(NETCF_1.0.0)(64bit) for package: libvirt-client-0.8.8-7.fc15.x86_64
+--> Processing Dependency: libxenstore.so.3.0()(64bit) for package: libvirt-client-0.8.8-7.fc15.x86_64
+--> Processing Dependency: libyajl.so.1()(64bit) for package: libvirt-client-0.8.8-7.fc15.x86_64
+--> Processing Dependency: libnl.so.1()(64bit) for package: libvirt-client-0.8.8-7.fc15.x86_64
+--> Processing Dependency: libnuma.so.1()(64bit) for package: libvirt-client-0.8.8-7.fc15.x86_64
+--> Processing Dependency: libaugeas.so.0()(64bit) for package: libvirt-client-0.8.8-7.fc15.x86_64
+--> Processing Dependency: libnetcf.so.1()(64bit) for package: libvirt-client-0.8.8-7.fc15.x86_64
+---> Package net-snmp-utils.x86_64 1:5.6.1-7.fc15 will be installed
+---> Package nss-tools.x86_64 0:3.12.10-6.fc15 will be installed
+---> Package oddjob.x86_64 0:0.31-2.fc15 will be installed
+---> Package parted.x86_64 0:2.3-10.fc15 will be installed
+---> Package perl-Net-Telnet.noarch 0:3.03-12.fc15 will be installed
+---> Package pexpect.noarch 0:2.3-6.fc15 will be installed
+---> Package pyOpenSSL.x86_64 0:0.10-3.fc15 will be installed
+---> Package python-suds.noarch 0:0.3.9-3.fc15 will be installed
+---> Package sg3_utils.x86_64 0:1.29-3.fc15 will be installed
+--> Processing Dependency: sg3_utils-libs = 1.29-3.fc15 for package: sg3_utils-1.29-3.fc15.x86_64
+--> Processing Dependency: libsgutils2.so.2()(64bit) for package: sg3_utils-1.29-3.fc15.x86_64
+--> Running transaction check
+---> Package augeas-libs.x86_64 0:0.9.0-1.fc15 will be installed
+---> Package cyrus-sasl-md5.x86_64 0:2.1.23-18.fc15 will be installed
+---> Package gettext.x86_64 0:0.18.1.1-7.fc15 will be installed
+--> Processing Dependency: libgomp.so.1(GOMP_1.0)(64bit) for package: gettext-0.18.1.1-7.fc15.x86_64
+--> Processing Dependency: libgettextlib-0.18.1.so()(64bit) for package: gettext-0.18.1.1-7.fc15.x86_64
+--> Processing Dependency: libgettextsrc-0.18.1.so()(64bit) for package: gettext-0.18.1.1-7.fc15.x86_64
+--> Processing Dependency: libgomp.so.1()(64bit) for package: gettext-0.18.1.1-7.fc15.x86_64
+---> Package gnutls-utils.x86_64 0:2.10.5-1.fc15 will be installed
+---> Package libnl.x86_64 0:1.1-14.fc15 will be installed
+---> Package nc.x86_64 0:1.100-3.fc15 will be installed
+--> Processing Dependency: libbsd.so.0(LIBBSD_0.0)(64bit) for package: nc-1.100-3.fc15.x86_64
+--> Processing Dependency: libbsd.so.0(LIBBSD_0.2)(64bit) for package: nc-1.100-3.fc15.x86_64
+--> Processing Dependency: libbsd.so.0()(64bit) for package: nc-1.100-3.fc15.x86_64
+---> Package netcf-libs.x86_64 0:0.1.9-1.fc15 will be installed
+---> Package numactl.x86_64 0:2.0.7-1.fc15 will be installed
+---> Package sg3_utils-libs.x86_64 0:1.29-3.fc15 will be installed
+---> Package xen-libs.x86_64 0:4.1.1-3.fc15 will be installed
+--> Processing Dependency: xen-licenses for package: xen-libs-4.1.1-3.fc15.x86_64
+---> Package yajl.x86_64 0:1.0.11-1.fc15 will be installed
+--> Running transaction check
+---> Package gettext-libs.x86_64 0:0.18.1.1-7.fc15 will be installed
+---> Package libbsd.x86_64 0:0.2.0-4.fc15 will be installed
+---> Package libgomp.x86_64 0:4.6.1-9.fc15 will be installed
+---> Package xen-licenses.x86_64 0:4.1.1-3.fc15 will be installed
+--> Finished Dependency Resolution
+
+Dependencies Resolved
+
+=============================================================================
+ Package Arch Version Repository Size
+=============================================================================
+Installing:
+ cman x86_64 3.1.7-1.fc15 updates 366 k
+ gfs2-cluster x86_64 3.1.1-2.fc15 fedora 69 k
+ gfs2-utils x86_64 3.1.1-2.fc15 fedora 222 k
+Installing for dependencies:
+ augeas-libs x86_64 0.9.0-1.fc15 updates 311 k
+ cyrus-sasl-md5 x86_64 2.1.23-18.fc15 updates 46 k
+ fence-agents x86_64 3.1.5-1.fc15 updates 186 k
+ gettext x86_64 0.18.1.1-7.fc15 fedora 1.0 M
+ gettext-libs x86_64 0.18.1.1-7.fc15 fedora 610 k
+ gnutls-utils x86_64 2.10.5-1.fc15 fedora 101 k
+ ipmitool x86_64 1.8.11-6.fc15 fedora 273 k
+ libbsd x86_64 0.2.0-4.fc15 fedora 37 k
+ libgomp x86_64 4.6.1-9.fc15 updates 95 k
+ libnl x86_64 1.1-14.fc15 fedora 118 k
+ libvirt-client x86_64 0.8.8-7.fc15 updates 2.4 M
+ modcluster x86_64 0.18.7-1.fc15 fedora 187 k
+ nc x86_64 1.100-3.fc15 updates 24 k
+ net-snmp-utils x86_64 1:5.6.1-7.fc15 fedora 180 k
+ netcf-libs x86_64 0.1.9-1.fc15 updates 50 k
+ nss-tools x86_64 3.12.10-6.fc15 updates 723 k
+ numactl x86_64 2.0.7-1.fc15 updates 54 k
+ oddjob x86_64 0.31-2.fc15 fedora 61 k
+ openais x86_64 1.1.4-2.fc15 fedora 190 k
+ openaislib x86_64 1.1.4-2.fc15 fedora 88 k
+ parted x86_64 2.3-10.fc15 updates 618 k
+ perl-Net-Telnet noarch 3.03-12.fc15 fedora 55 k
+ pexpect noarch 2.3-6.fc15 fedora 141 k
+ pyOpenSSL x86_64 0.10-3.fc15 fedora 198 k
+ python-suds noarch 0.3.9-3.fc15 fedora 195 k
+ ricci x86_64 0.18.7-1.fc15 fedora 584 k
+ sg3_utils x86_64 1.29-3.fc15 fedora 465 k
+ sg3_utils-libs x86_64 1.29-3.fc15 fedora 54 k
+ xen-libs x86_64 4.1.1-3.fc15 updates 310 k
+ xen-licenses x86_64 4.1.1-3.fc15 updates 64 k
+ yajl x86_64 1.0.11-1.fc15 fedora 27 k
+
+Transaction Summary
+=============================================================================
+Install 34 Package(s)
+
+Total download size: 10 M
+Installed size: 38 M
+Downloading Packages:
+(1/34): augeas-libs-0.9.0-1.fc15.x86_64.rpm | 311 kB 00:00
+(2/34): cman-3.1.7-1.fc15.x86_64.rpm | 366 kB 00:00
+(3/34): cyrus-sasl-md5-2.1.23-18.fc15.x86_64.rpm | 46 kB 00:00
+(4/34): fence-agents-3.1.5-1.fc15.x86_64.rpm | 186 kB 00:00
+(5/34): gettext-0.18.1.1-7.fc15.x86_64.rpm | 1.0 MB 00:01
+(6/34): gettext-libs-0.18.1.1-7.fc15.x86_64.rpm | 610 kB 00:00
+(7/34): gfs2-cluster-3.1.1-2.fc15.x86_64.rpm | 69 kB 00:00
+(8/34): gfs2-utils-3.1.1-2.fc15.x86_64.rpm | 222 kB 00:00
+(9/34): gnutls-utils-2.10.5-1.fc15.x86_64.rpm | 101 kB 00:00
+(10/34): ipmitool-1.8.11-6.fc15.x86_64.rpm | 273 kB 00:00
+(11/34): libbsd-0.2.0-4.fc15.x86_64.rpm | 37 kB 00:00
+(12/34): libgomp-4.6.1-9.fc15.x86_64.rpm | 95 kB 00:00
+(13/34): libnl-1.1-14.fc15.x86_64.rpm | 118 kB 00:00
+(14/34): libvirt-client-0.8.8-7.fc15.x86_64.rpm | 2.4 MB 00:01
+(15/34): modcluster-0.18.7-1.fc15.x86_64.rpm | 187 kB 00:00
+(16/34): nc-1.100-3.fc15.x86_64.rpm | 24 kB 00:00
+(17/34): net-snmp-utils-5.6.1-7.fc15.x86_64.rpm | 180 kB 00:00
+(18/34): netcf-libs-0.1.9-1.fc15.x86_64.rpm | 50 kB 00:00
+(19/34): nss-tools-3.12.10-6.fc15.x86_64.rpm | 723 kB 00:00
+(20/34): numactl-2.0.7-1.fc15.x86_64.rpm | 54 kB 00:00
+(21/34): oddjob-0.31-2.fc15.x86_64.rpm | 61 kB 00:00
+(22/34): openais-1.1.4-2.fc15.x86_64.rpm | 190 kB 00:00
+(23/34): openaislib-1.1.4-2.fc15.x86_64.rpm | 88 kB 00:00
+(24/34): parted-2.3-10.fc15.x86_64.rpm | 618 kB 00:00
+(25/34): perl-Net-Telnet-3.03-12.fc15.noarch.rpm | 55 kB 00:00
+(26/34): pexpect-2.3-6.fc15.noarch.rpm | 141 kB 00:00
+(27/34): pyOpenSSL-0.10-3.fc15.x86_64.rpm | 198 kB 00:00
+(28/34): python-suds-0.3.9-3.fc15.noarch.rpm | 195 kB 00:00
+(29/34): ricci-0.18.7-1.fc15.x86_64.rpm | 584 kB 00:00
+(30/34): sg3_utils-1.29-3.fc15.x86_64.rpm | 465 kB 00:00
+(31/34): sg3_utils-libs-1.29-3.fc15.x86_64.rpm | 54 kB 00:00
+(32/34): xen-libs-4.1.1-3.fc15.x86_64.rpm | 310 kB 00:00
+(33/34): xen-licenses-4.1.1-3.fc15.x86_64.rpm | 64 kB 00:00
+(34/34): yajl-1.0.11-1.fc15.x86_64.rpm | 27 kB 00:00
+ -----------------------------------------------------------------------------
+Total 803 kB/s | 10 MB 00:12
+Running rpm_check_debug
+Running Transaction Test
+Transaction Test Succeeded
+Running Transaction
+ Installing : openais-1.1.4-2.fc15.x86_64 1/34
+ Installing : openaislib-1.1.4-2.fc15.x86_64 2/34
+ Installing : libnl-1.1-14.fc15.x86_64 3/34
+ Installing : augeas-libs-0.9.0-1.fc15.x86_64 4/34
+ Installing : oddjob-0.31-2.fc15.x86_64 5/34
+ Installing : modcluster-0.18.7-1.fc15.x86_64 6/34
+ Installing : netcf-libs-0.1.9-1.fc15.x86_64 7/34
+ Installing : 1:net-snmp-utils-5.6.1-7.fc15.x86_64 8/34
+ Installing : sg3_utils-libs-1.29-3.fc15.x86_64 9/34
+ Installing : sg3_utils-1.29-3.fc15.x86_64 10/34
+ Installing : libgomp-4.6.1-9.fc15.x86_64 11/34
+ Installing : gnutls-utils-2.10.5-1.fc15.x86_64 12/34
+ Installing : pyOpenSSL-0.10-3.fc15.x86_64 13/34
+ Installing : parted-2.3-10.fc15.x86_64 14/34
+ Installing : cyrus-sasl-md5-2.1.23-18.fc15.x86_64 15/34
+ Installing : python-suds-0.3.9-3.fc15.noarch 16/34
+ Installing : ipmitool-1.8.11-6.fc15.x86_64 17/34
+ Installing : perl-Net-Telnet-3.03-12.fc15.noarch 18/34
+ Installing : numactl-2.0.7-1.fc15.x86_64 19/34
+ Installing : yajl-1.0.11-1.fc15.x86_64 20/34
+ Installing : gettext-libs-0.18.1.1-7.fc15.x86_64 21/34
+ Installing : gettext-0.18.1.1-7.fc15.x86_64 22/34
+ Installing : libbsd-0.2.0-4.fc15.x86_64 23/34
+ Installing : nc-1.100-3.fc15.x86_64 24/34
+ Installing : xen-licenses-4.1.1-3.fc15.x86_64 25/34
+ Installing : xen-libs-4.1.1-3.fc15.x86_64 26/34
+ Installing : libvirt-client-0.8.8-7.fc15.x86_64 27/34
+
+Note: This output shows SysV services only and does not include native
+ systemd services. SysV configuration data might be overridden by native
+ systemd configuration.
+
+ Installing : nss-tools-3.12.10-6.fc15.x86_64 28/34
+ Installing : ricci-0.18.7-1.fc15.x86_64 29/34
+ Installing : pexpect-2.3-6.fc15.noarch 30/34
+ Installing : fence-agents-3.1.5-1.fc15.x86_64 31/34
+ Installing : cman-3.1.7-1.fc15.x86_64 32/34
+ Installing : gfs2-cluster-3.1.1-2.fc15.x86_64 33/34
+ Installing : gfs2-utils-3.1.1-2.fc15.x86_64 34/34
+
+Installed:
+ cman.x86_64 0:3.1.7-1.fc15 gfs2-cluster.x86_64 0:3.1.1-2.fc15
+ gfs2-utils.x86_64 0:3.1.1-2.fc15
+
+Dependency Installed:
+ augeas-libs.x86_64 0:0.9.0-1.fc15
+ cyrus-sasl-md5.x86_64 0:2.1.23-18.fc15
+ fence-agents.x86_64 0:3.1.5-1.fc15
+ gettext.x86_64 0:0.18.1.1-7.fc15
+ gettext-libs.x86_64 0:0.18.1.1-7.fc15
+ gnutls-utils.x86_64 0:2.10.5-1.fc15
+ ipmitool.x86_64 0:1.8.11-6.fc15
+ libbsd.x86_64 0:0.2.0-4.fc15
+ libgomp.x86_64 0:4.6.1-9.fc15
+ libnl.x86_64 0:1.1-14.fc15
+ libvirt-client.x86_64 0:0.8.8-7.fc15
+ modcluster.x86_64 0:0.18.7-1.fc15
+ nc.x86_64 0:1.100-3.fc15
+ net-snmp-utils.x86_64 1:5.6.1-7.fc15
+ netcf-libs.x86_64 0:0.1.9-1.fc15
+ nss-tools.x86_64 0:3.12.10-6.fc15
+ numactl.x86_64 0:2.0.7-1.fc15
+ oddjob.x86_64 0:0.31-2.fc15
+ openais.x86_64 0:1.1.4-2.fc15
+ openaislib.x86_64 0:1.1.4-2.fc15
+ parted.x86_64 0:2.3-10.fc15
+ perl-Net-Telnet.noarch 0:3.03-12.fc15
+ pexpect.noarch 0:2.3-6.fc15
+ pyOpenSSL.x86_64 0:0.10-3.fc15
+ python-suds.noarch 0:0.3.9-3.fc15
+ ricci.x86_64 0:0.18.7-1.fc15
+ sg3_utils.x86_64 0:1.29-3.fc15
+ sg3_utils-libs.x86_64 0:1.29-3.fc15
+ xen-libs.x86_64 0:4.1.1-3.fc15
+ xen-licenses.x86_64 0:4.1.1-3.fc15
+ yajl.x86_64 0:1.0.11-1.fc15
+
+Complete!
+-----
+
+=== Configuring CMAN ===
+
+The first thing we need to do, is tell CMAN complete starting up even
+without quorum. We can do this by changing the quorum timeout setting:
+
+[source,Bash]
+-----
+# sed -i.sed "s/.*CMAN_QUORUM_TIMEOUT=.*/CMAN_QUORUM_TIMEOUT=0/g" /etc/sysconfig/cman
+-----
+
+Next we create a basic configuration file and place is in
+/etc/cluster/cluster.conf. The name used for each clusternode should
+correspond to that node's uname -n, just as Pacemaker expects. The nodeid
+can be any positive mumber but nust be unique.
+
+.Basic cluster.conf for a two-node cluster
+[source,XML]
+-----
+<?xml version="1.0"?>
+<cluster config_version="1" name="my_cluster_name">
+ <logging debug="off"/>
+ <clusternodes>
+ <clusternode name="pcmk-1" nodeid="1"/>
+ <clusternode name="pcmk-2" nodeid="2"/>
+ </clusternodes>
+</cluster>
+-----
+
+=== Configuring CMAN Fencing ===
+
+We configure the fence_pcmk agent (supplied with Pacemaker) to redirect
+any fencing requests from CMAN components (such as dlm_controld) to
+Pacemaker. Pacemaker's fencing subsystem lets other parts of the stack
+know that a node has been successfully fenced, thus avoiding the need for
+it to be fenced again when other subsystems notice the node is gone.
+
+
+[WARNING]
+=========
+Warning
+Configuring real fencing devices in CMAN will result in nodes being
+fenced multiple times as different parts of the stack notice the node is
+missing or failed.
+=========
+
+The definition should be placed in the fencedevices
+section and contain:
+
+[source,XML]
+-----
+ <fencedevice name="pcmk" agent="fence_pcmk"/>
+-----
+
+Each clusternode must be configured to use this device by adding a
+fence method block that lists the node's name as the port.
+
+[source,XML]
+-----
+ <fence>
+ <method name="pcmk-redirect">
+ <device name="pcmk" port="node_name_here"/>
+ </method>
+ </fence>
+-----
+
+Putting everything together, we have:
+
+.cluster.conf for a two-node cluster with fencing
+[source,XML]
+-----
+<?xml version="1.0"?>
+<cluster config_version="1" name="mycluster">
+ <logging debug="off"/>
+ <clusternodes>
+ <clusternode name="pcmk-1" nodeid="1">
+ <fence>
+ <method name="pcmk-redirect">
+ <device name="pcmk" port="pcmk-1"/>
+ </method>
+ </fence>
+ </clusternode>
+ <clusternode name="pcmk-2" nodeid="2">
+ <fence>
+ <method name="pcmk-redirect">
+ <device name="pcmk" port="pcmk-2"/>
+ </method>
+ </fence>
+ </clusternode>
+ </clusternodes>
+ <fencedevices>
+ <fencedevice name="pcmk" agent="fence_pcmk"/>
+ </fencedevices>
+</cluster>
+-----
+
+
+=== Bringing the Cluster Online with CMAN ===
+
+The first thing to do is check that the configuration is valid
+
+[source,Bash]
+-----
+# ccs_config_validate
+Configuration validates
+-----
+
+Now start CMAN
+
+[source,Bash]
+-----
+# service cman start
+Starting cluster:
+ Checking Network Manager... [ OK ]
+ Global setup... [ OK ]
+ Loading kernel modules... [ OK ]
+ Mounting configfs... [ OK ]
+ Starting cman... [ OK ]
+ Waiting for quorum... [ OK ]
+ Starting fenced... [ OK ]
+ Starting dlm_controld... [ OK ]
+ Starting gfs_controld... [ OK ]
+ Unfencing self... [ OK ]
+ Joining fence domain... [ OK ]
+# crm_mon -1
+-----
+
+Once you have confirmed that the first node is happily online, start the
+second node.
+
+[source,Bash]
+-----
+[root@pcmk-2 ~]# service cman startStarting cluster:
+ Checking Network Manager... [ OK ]
+ Global setup... [ OK ]
+ Loading kernel modules... [ OK ]
+ Mounting configfs... [ OK ]
+ Starting cman... [ OK ]
+ Waiting for quorum... [ OK ]
+ Starting fenced... [ OK ]
+ Starting dlm_controld... [ OK ]
+ Starting gfs_controld... [ OK ]
+ Unfencing self... [ OK ]
+ Joining fence domain... [ OK ]
+# cman_tool nodes
+Node Sts Inc Joined Name
+ 1 M 548 2011-09-28 10:52:21 pcmk-1
+ 2 M 548 2011-09-28 10:52:21 pcmk-2
+# crm_mon -1
+-----
+
+You should now see both nodes online and services started.
+
+
+== Create a GFS2 Filesystem ==
+
+[[GFS2_prep]]
+=== Preparation ===
+
+Before we do anything to the existing partition, we need to make sure it
+is unmounted. We do this by tell the cluster to stop the WebFS resource.
+This will ensure that other resources (in our case, Apache) using WebFS
+are not only stopped, but stopped in the correct order.
+
+[source,Bash]
+-----
+# crm_resource --resource WebFS --set-parameter target-role --meta --parameter-value Stopped
+# crm_mon
+============
+Last updated: Thu Sep 3 15:18:06 2009
+Stack: openais
+Current DC: pcmk-1 - partition with quorum
+Version: 1.1.5-bdd89e69ba545404d02445be1f3d72e6a203ba2f
+2 Nodes configured, 2 expected votes
+6 Resources configured.
+============
+
+Online: [ pcmk-1 pcmk-2 ]
+
+Master/Slave Set: WebDataClone
+ Masters: [ pcmk-1 ]
+ Slaves: [ pcmk-2 ]
+ClusterIP (ocf::heartbeat:IPaddr): Started pcmk-1
+-----
+
+[NOTE]
+=======
+
+Note that both Apache and WebFS have been stopped.
+
+=======
+
+=== Create and Populate an GFS2 Partition ===
+
+Now that the cluster stack and integration pieces are running smoothly,
+we can create an GFS2 partition.
+
+[WARNING]
+=========
+
+This will erase all previous content stored on the DRBD device. Ensure
+you have a copy of any important data.
+
+=========
+
+We need to specify a number of additional parameters when creating a
+GFS2 partition.
+
+First we must use the -p option to specify that we want to use the the
+Kernel's DLM. Next we use -j to indicate that it should reserve enough
+space for two journals (one per node accessing the filesystem).
+
+Lastly, we use -t to specify the lock table name. The format for this
+field is clustername:fsname. For the fsname, we just need to pick
+something unique and descriptive and since we haven't specified a
+clustername yet, we will use the default (pcmk).
+
+To specify an alternate name for the cluster, locate the service
+section containing "name: pacemaker" in corosync.conf and insert the
+following line anywhere inside the block:
+.....
+clustername: myname
+.....
+Do this on each node in the cluster and be sure to restart them before
+continuing.
+
+[source,Bash]
+-----
+# mkfs.gfs2 -p lock_dlm -j 2 -t pcmk:web /dev/drbd1
+This will destroy any data on /dev/drbd1.
+It appears to contain: data
+
+Are you sure you want to proceed? [y/n] y
+
+Device: /dev/drbd1
+Blocksize: 4096
+Device Size 1.00 GB (131072 blocks)
+Filesystem Size: 1.00 GB (131070 blocks)
+Journals: 2
+Resource Groups: 2
+Locking Protocol: "lock_dlm"
+Lock Table: "pcmk:web"
+UUID: 6B776F46-177B-BAF8-2C2B-292C0E078613
+-----
+
+Then (re)populate the new filesystem with data (web pages). For now we'll
+create another variation on our home page.
+
+[source,Bash]
+-----
+# mount /dev/drbd1 /mnt/# cat <<-END >/mnt/index.html
+<html>
+<body>My Test Site - GFS2</body>
+</html>
+END
+# umount /dev/drbd1
+# drbdadm verify wwwdata#
+-----
+
+== Reconfigure the Cluster for GFS2 ==
+
+[source,Bash]
+-----
+# crm
+crm(live) # cib new GFS2
+INFO: GFS2 shadow CIB created
+crm(GFS2) # configure delete WebFS
+crm(GFS2) # configure primitive WebFS ocf:heartbeat:Filesystem params device="/dev/drbd/by-res/wwwdata" directory="/var/www/html" fstype="gfs2"
+-----
+
+Now that we've recreated the resource, we also need to recreate all the
+constraints that used it. This is because the shell will automatically
+remove any constraints that referenced WebFS.
+
+[source,Bash]
+-----
+crm(GFS2) # configure colocation WebSite-with-WebFS inf: WebSite WebFS
+crm(GFS2) # configure colocation fs_on_drbd inf: WebFS WebDataClone:Master
+crm(GFS2) # configure order WebFS-after-WebData inf: WebDataClone:promote WebFS:start
+crm(GFS2) # configure order WebSite-after-WebFS inf: WebFS WebSite
+crm(GFS2) # configure show
+node pcmk-1
+node pcmk-2
+primitive WebData ocf:linbit:drbd \
+ params drbd_resource="wwwdata" \
+ op monitor interval="60s"
+primitive WebFS ocf:heartbeat:Filesystem \
+ params device="/dev/drbd/by-res/wwwdata" directory="/var/www/html" fstype="gfs2"
+primitive WebSite ocf:heartbeat:apache \
+ params configfile="/etc/httpd/conf/httpd.conf" \
+ op monitor interval="1min"
+primitive ClusterIP ocf:heartbeat:IPaddr2 \
+ params ip="192.168.122.101" cidr_netmask="32" \
+ op monitor interval="30s"
+ms WebDataClone WebData \
+ meta master-max="1" master-node-max="1" clone-max="2" clone-node-max="1" notify="true"
+colocation WebSite-with-WebFS inf: WebSite WebFS
+colocation fs_on_drbd inf: WebFS WebDataClone:Master
+colocation website-with-ip inf: WebSite ClusterIP
+order WebFS-after-WebData inf: WebDataClone:promote WebFS:start
+order WebSite-after-WebFS inf: WebFS WebSite
+order apache-after-ip inf: ClusterIP WebSite
+property $id="cib-bootstrap-options" \
+ dc-version="1.1.5-bdd89e69ba545404d02445be1f3d72e6a203ba2f" \
+ cluster-infrastructure="openais" \
+ expected-quorum-votes="2" \
+ stonith-enabled="false" \
+ no-quorum-policy="ignore"
+rsc_defaults $id="rsc-options" \
+ resource-stickiness="100"
+-----
+
+Review the configuration before uploading it to the cluster, quitting the
+shell and watching the cluster's response
+
+[source,Bash]
+-----
+crm(GFS2) # cib commit GFS2
+INFO: commited 'GFS2' shadow CIB to the cluster
+crm(GFS2) # quit
+bye
+# crm_mon
+============
+Last updated: Thu Sep 3 20:49:54 2009
+Stack: openais
+Current DC: pcmk-2 - partition with quorum
+Version: 1.1.5-bdd89e69ba545404d02445be1f3d72e6a203ba2f
+2 Nodes configured, 2 expected votes
+6 Resources configured.
+============
+
+Online: [ pcmk-1 pcmk-2 ]
+
+WebSite (ocf::heartbeat:apache): Started pcmk-2
+Master/Slave Set: WebDataClone
+ Masters: [ pcmk-1 ]
+ Slaves: [ pcmk-2 ]
+ClusterIP (ocf::heartbeat:IPaddr): Started pcmk-2WebFS (ocf::heartbeat:Filesystem): Started pcmk-1
+-----
+
+== Reconfigure Pacemaker for Active/Active ==
+
+Almost everything is in place. Recent versions of DRBD are capable of
+operating in Primary/Primary mode and the filesystem we're using is
+cluster aware. All we need to do now is reconfigure the cluster to take
+advantage of this.
+
+This will involve a number of changes, so we'll again use interactive
+mode.
+
+# crm
+# cib new active
+
+There's no point making the services active on both locations if we can't
+reach them, so lets first clone the IP address. Cloned IPaddr2 resources
+use an iptables rule to ensure that each request only processed by one of
+the two clone instances. The additional meta options tell the cluster how
+many instances of the clone we want (one "request bucket" for each node)
+and that if all other nodes fail, then the remaining node should hold all
+of them. Otherwise the requests would be simply discarded.
+
+[source,Bash]
+-----
+# configure clone WebIP ClusterIP \
+ meta globally-unique="true" clone-max="2" clone-node-max="2"
+-----
+
+Now we must tell the ClusterIP how to decide which requests are
+processed by which hosts. To do this we must specify the
+clusterip_hash parameter.
+
+Open the ClusterIP resource
+
+[source,Bash]
+-----
+# configure edit ClusterIP
+-----
+
+And add the following to the params line
+
+.....
+clusterip_hash="sourceip"
+.....
+
+So that the complete definition looks like:
+
+.....
+primitive ClusterIP ocf:heartbeat:IPaddr2 \
+ params ip="192.168.122.101" cidr_netmask="32" clusterip_hash="sourceip" \
+ op monitor interval="30s"
+.....
+
+Here is the full transcript
+
+[source,Bash]
+-----
+# crm crm(live)
+# cib new active
+INFO: active shadow CIB created
+crm(active) # configure clone WebIP ClusterIP \
+ meta globally-unique="true" clone-max="2" clone-node-max="2"
+crm(active) # configure shownode pcmk-1
+node pcmk-2
+primitive WebData ocf:linbit:drbd \
+ params drbd_resource="wwwdata" \
+ op monitor interval="60s"
+primitive WebFS ocf:heartbeat:Filesystem \
+ params device="/dev/drbd/by-res/wwwdata" directory="/var/www/html" fstype="gfs2"
+primitive WebSite ocf:heartbeat:apache \
+ params configfile="/etc/httpd/conf/httpd.conf" \
+ op monitor interval="1min"
+primitive ClusterIP ocf:heartbeat:IPaddr2 \
+ params ip="192.168.122.101" cidr_netmask="32" clusterip_hash="sourceip" \
+ op monitor interval="30s"
+ms WebDataClone WebData \
+ meta master-max="1" master-node-max="1" clone-max="2" clone-node-max="1" notify="true"
+clone WebIP ClusterIP \
+ meta globally-unique="true" clone-max="2" clone-node-max="2"
+colocation WebSite-with-WebFS inf: WebSite WebFS
+colocation fs_on_drbd inf: WebFS WebDataClone:Master
+colocation website-with-ip inf: WebSite WebIPorder WebFS-after-WebData inf: WebDataClone:promote WebFS:start
+order WebSite-after-WebFS inf: WebFS WebSiteorder apache-after-ip inf: WebIP WebSite
+property $id="cib-bootstrap-options" \
+ dc-version="1.1.5-bdd89e69ba545404d02445be1f3d72e6a203ba2f" \
+ cluster-infrastructure="openais" \
+ expected-quorum-votes="2" \
+ stonith-enabled="false" \
+ no-quorum-policy="ignore"
+rsc_defaults $id="rsc-options" \
+ resource-stickiness="100"
+-----
+
+Notice how any constraints that referenced ClusterIP have been updated
+to use WebIP instead. This is an additional benefit of using the crm
+shell.
+
+Next we need to convert the filesystem and Apache resources into
+clones. Again, the shell will automatically update any relevant
+constraints.
+
+[source,Bash]
+-----
+crm(active) # configure clone WebFSClone WebFS
+crm(active) # configure clone WebSiteClone WebSite
+-----
+
+The last step is to tell the cluster that it is now allowed to promote
+both instances to be Primary (aka. Master).
+
+[source,Bash]
+-----
+crm(active) # configure edit WebDataClone
+-----
+
+Change master-max to 2
+
+[source,Bash]
+-----
+crm(active) # configure show
+node pcmk-1
+node pcmk-2
+primitive WebData ocf:linbit:drbd \
+ params drbd_resource="wwwdata" \
+ op monitor interval="60s"
+primitive WebFS ocf:heartbeat:Filesystem \
+ params device="/dev/drbd/by-res/wwwdata" directory="/var/www/html" fstype="gfs2"
+primitive WebSite ocf:heartbeat:apache \
+ params configfile="/etc/httpd/conf/httpd.conf" \
+ op monitor interval="1min"
+primitive ClusterIP ocf:heartbeat:IPaddr2 \
+ params ip="192.168.122.101" cidr_netmask="32" clusterip_hash="sourceip" \
+ op monitor interval="30s"
+ms WebDataClone WebData \
+ meta master-max="2" master-node-max="1" clone-max="2" clone-node-max="1" notify="true"
+clone WebFSClone WebFSclone WebIP ClusterIP \
+ meta globally-unique="true" clone-max="2" clone-node-max="2"
+clone WebSiteClone WebSitecolocation WebSite-with-WebFS inf: WebSiteClone WebFSClone
+colocation fs_on_drbd inf: WebFSClone WebDataClone:Master
+colocation website-with-ip inf: WebSiteClone WebIP
+order WebFS-after-WebData inf: WebDataClone:promote WebFSClone:start
+order WebSite-after-WebFS inf: WebFSClone WebSiteClone
+order apache-after-ip inf: WebIP WebSiteClone
+property $id="cib-bootstrap-options" \
+ dc-version="1.1.5-bdd89e69ba545404d02445be1f3d72e6a203ba2f" \
+ cluster-infrastructure="openais" \
+ expected-quorum-votes="2" \
+ stonith-enabled="false" \
+ no-quorum-policy="ignore"
+rsc_defaults $id="rsc-options" \
+ resource-stickiness="100"
+-----
+
+Review the configuration before uploading it to the cluster, quitting the
+shell and watching the cluster's response
+
+[source,Bash]
+-----
+crm(active) # cib commit active
+INFO: commited 'active' shadow CIB to the cluster
+crm(active) # quit
+bye
+# crm_mon
+============
+Last updated: Thu Sep 3 21:37:27 2009
+Stack: openais
+Current DC: pcmk-2 - partition with quorum
+Version: 1.1.5-bdd89e69ba545404d02445be1f3d72e6a203ba2f
+2 Nodes configured, 2 expected votes
+6 Resources configured.
+============
+
+Online: [ pcmk-1 pcmk-2 ]
+
+Master/Slave Set: WebDataClone
+ Masters: [ pcmk-1 pcmk-2 ]
+Clone Set: WebIP Started: [ pcmk-1 pcmk-2 ]
+Clone Set: WebFSClone Started: [ pcmk-1 pcmk-2 ]
+Clone Set: WebSiteClone Started: [ pcmk-1 pcmk-2 ]
+-----
+
+=== Testing Recovery ===
+
+[NOTE]
+=======
+TODO: Put one node into standby to demonstrate failover
+=======
diff --git a/doc/Clusters_from_Scratch/en-US/Ch-Active-Active.xml b/doc/Clusters_from_Scratch/en-US/Ch-Active-Active.xml
deleted file mode 100644
index d9cdb0effe..0000000000
--- a/doc/Clusters_from_Scratch/en-US/Ch-Active-Active.xml
+++ /dev/null
@@ -1,824 +0,0 @@
-<?xml version='1.0' encoding='utf-8' ?>
-<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
-<!ENTITY % BOOK_ENTITIES SYSTEM "Clusters_from_Scratch.ent">
-%BOOK_ENTITIES;
-]>
-<chapter>
- <title>Conversion to Active/Active</title>
- <section>
- <title>Requirements</title>
- <para>
- The primary requirement for an Active/Active cluster is that the data required for your services is available, simultaneously, on both machines.
- Pacemaker makes no requirement on how this is achieved, you could use a SAN if you had one available, however since DRBD supports multiple Primaries, we can also use that.
- </para>
- <para>
- The only hitch is that we need to use a cluster-aware filesystem. The one we used earlier with DRBD, ext4, is not one of those.
- Both OCFS2 and GFS2 are supported, however here we will use GFS2 which comes with &DISTRO; &DISTRO_VERSION; .
- </para>
- <para>
- We'll also need to use CMAN for Cluster Membership and Quorum instead of our Corosync plugin.
- </para>
- </section>
-
- <section>
- <title>Adding CMAN Support</title>
- <para>
- <ulink url="http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html-single/Cluster_Suite_Overview/index.html#s2-clumembership-overview-CSO">CMAN v3</ulink> is a Corsync plugin that monitors the names and number of active cluster nodes in order to deliver membership and quorum information to clients (such as the Pacemaker daemons).
- </para>
- <para>
- In a traditional Corosync-Pacemaker cluster, a Pacemaker plugin is loaded to provide membership and quorum information.
- The motivation for wanting to use CMAN for this instead, is to ensure all elements of the cluster stack are making decisions based on the same membership and quorum data.
- <footnote>
- <para>
- A failure to do this can lead to what is called <literal>internal split-brain</literal> - a situation where different parts of the stack disagree about whether some nodes are alive or dead - which quickly leads to unnecssary down-time and/or data corruption.
- </para>
- </footnote>
- </para>
- <para>
- In the case of GFS2, the key pieces are the <filename>dlm_controld</filename> and <filename>gfs_controld</filename> helpers which act as the glue between the filesystem and the cluster software.
- Supporting CMAN enables us to use the versions already being shipped by most distributions (since CMAN has been around longer than Pacemaker and is part of the Red Hat cluster stack).
- </para>
- <warning>
- <para>
- Ensure Corosync and Pacemaker are stopped <emphasis>on all nodes</emphasis> before continuing
- </para>
- </warning>
- <warning>
- <para>
- Be sure to disable the Pacemaker plugin before continuing with this section.
- In most cases, this can be achieved by removing <filename>/etc/corosync/service.d/pcmk</filename> and stopping Corosync.
- </para>
- </warning>
- <section>
- <title>Installing the required Software</title>
- <screen>
-[root@pcmk-1 ~]# <userinput>yum install -y cman gfs2-utils gfs2-cluster</userinput>
-Loaded plugins: auto-update-debuginfo
-Setting up Install Process
-Resolving Dependencies
---&gt; Running transaction check
----&gt; Package cman.x86_64 0:3.1.7-1.fc15 will be installed
---&gt; Processing Dependency: modcluster >= 0.18.1-1 for package: cman-3.1.7-1.fc15.x86_64
---&gt; Processing Dependency: fence-agents >= 3.1.5-1 for package: cman-3.1.7-1.fc15.x86_64
---&gt; Processing Dependency: openais >= 1.1.4-1 for package: cman-3.1.7-1.fc15.x86_64
---&gt; Processing Dependency: ricci >= 0.18.1-1 for package: cman-3.1.7-1.fc15.x86_64
---&gt; Processing Dependency: libSaCkpt.so.3(OPENAIS_CKPT_B.01.01)(64bit) for package: cman-3.1.7-1.fc15.x86_64
---&gt; Processing Dependency: libSaCkpt.so.3()(64bit) for package: cman-3.1.7-1.fc15.x86_64
----&gt; Package gfs2-cluster.x86_64 0:3.1.1-2.fc15 will be installed
----&gt; Package gfs2-utils.x86_64 0:3.1.1-2.fc15 will be installed
---&gt; Running transaction check
----&gt; Package fence-agents.x86_64 0:3.1.5-1.fc15 will be installed
---&gt; Processing Dependency: /usr/bin/virsh for package: fence-agents-3.1.5-1.fc15.x86_64
---&gt; Processing Dependency: net-snmp-utils for package: fence-agents-3.1.5-1.fc15.x86_64
---&gt; Processing Dependency: sg3_utils for package: fence-agents-3.1.5-1.fc15.x86_64
---&gt; Processing Dependency: perl(Net::Telnet) for package: fence-agents-3.1.5-1.fc15.x86_64
---&gt; Processing Dependency: /usr/bin/ipmitool for package: fence-agents-3.1.5-1.fc15.x86_64
---&gt; Processing Dependency: perl-Net-Telnet for package: fence-agents-3.1.5-1.fc15.x86_64
---&gt; Processing Dependency: pexpect for package: fence-agents-3.1.5-1.fc15.x86_64
---&gt; Processing Dependency: pyOpenSSL for package: fence-agents-3.1.5-1.fc15.x86_64
---&gt; Processing Dependency: python-suds for package: fence-agents-3.1.5-1.fc15.x86_64
----&gt; Package modcluster.x86_64 0:0.18.7-1.fc15 will be installed
---&gt; Processing Dependency: oddjob for package: modcluster-0.18.7-1.fc15.x86_64
----&gt; Package openais.x86_64 0:1.1.4-2.fc15 will be installed
----&gt; Package openaislib.x86_64 0:1.1.4-2.fc15 will be installed
----&gt; Package ricci.x86_64 0:0.18.7-1.fc15 will be installed
---&gt; Processing Dependency: parted for package: ricci-0.18.7-1.fc15.x86_64
---&gt; Processing Dependency: nss-tools for package: ricci-0.18.7-1.fc15.x86_64
---&gt; Running transaction check
----&gt; Package ipmitool.x86_64 0:1.8.11-6.fc15 will be installed
----&gt; Package libvirt-client.x86_64 0:0.8.8-7.fc15 will be installed
---&gt; Processing Dependency: libnetcf.so.1(NETCF_1.3.0)(64bit) for package: libvirt-client-0.8.8-7.fc15.x86_64
---&gt; Processing Dependency: cyrus-sasl-md5 for package: libvirt-client-0.8.8-7.fc15.x86_64
---&gt; Processing Dependency: gettext for package: libvirt-client-0.8.8-7.fc15.x86_64
---&gt; Processing Dependency: nc for package: libvirt-client-0.8.8-7.fc15.x86_64
---&gt; Processing Dependency: libnuma.so.1(libnuma_1.1)(64bit) for package: libvirt-client-0.8.8-7.fc15.x86_64
---&gt; Processing Dependency: libnuma.so.1(libnuma_1.2)(64bit) for package: libvirt-client-0.8.8-7.fc15.x86_64
---&gt; Processing Dependency: libnetcf.so.1(NETCF_1.2.0)(64bit) for package: libvirt-client-0.8.8-7.fc15.x86_64
---&gt; Processing Dependency: gnutls-utils for package: libvirt-client-0.8.8-7.fc15.x86_64
---&gt; Processing Dependency: libnetcf.so.1(NETCF_1.0.0)(64bit) for package: libvirt-client-0.8.8-7.fc15.x86_64
---&gt; Processing Dependency: libxenstore.so.3.0()(64bit) for package: libvirt-client-0.8.8-7.fc15.x86_64
---&gt; Processing Dependency: libyajl.so.1()(64bit) for package: libvirt-client-0.8.8-7.fc15.x86_64
---&gt; Processing Dependency: libnl.so.1()(64bit) for package: libvirt-client-0.8.8-7.fc15.x86_64
---&gt; Processing Dependency: libnuma.so.1()(64bit) for package: libvirt-client-0.8.8-7.fc15.x86_64
---&gt; Processing Dependency: libaugeas.so.0()(64bit) for package: libvirt-client-0.8.8-7.fc15.x86_64
---&gt; Processing Dependency: libnetcf.so.1()(64bit) for package: libvirt-client-0.8.8-7.fc15.x86_64
----&gt; Package net-snmp-utils.x86_64 1:5.6.1-7.fc15 will be installed
----&gt; Package nss-tools.x86_64 0:3.12.10-6.fc15 will be installed
----&gt; Package oddjob.x86_64 0:0.31-2.fc15 will be installed
----&gt; Package parted.x86_64 0:2.3-10.fc15 will be installed
----&gt; Package perl-Net-Telnet.noarch 0:3.03-12.fc15 will be installed
----&gt; Package pexpect.noarch 0:2.3-6.fc15 will be installed
----&gt; Package pyOpenSSL.x86_64 0:0.10-3.fc15 will be installed
----&gt; Package python-suds.noarch 0:0.3.9-3.fc15 will be installed
----&gt; Package sg3_utils.x86_64 0:1.29-3.fc15 will be installed
---&gt; Processing Dependency: sg3_utils-libs = 1.29-3.fc15 for package: sg3_utils-1.29-3.fc15.x86_64
---&gt; Processing Dependency: libsgutils2.so.2()(64bit) for package: sg3_utils-1.29-3.fc15.x86_64
---&gt; Running transaction check
----&gt; Package augeas-libs.x86_64 0:0.9.0-1.fc15 will be installed
----&gt; Package cyrus-sasl-md5.x86_64 0:2.1.23-18.fc15 will be installed
----&gt; Package gettext.x86_64 0:0.18.1.1-7.fc15 will be installed
---&gt; Processing Dependency: libgomp.so.1(GOMP_1.0)(64bit) for package: gettext-0.18.1.1-7.fc15.x86_64
---&gt; Processing Dependency: libgettextlib-0.18.1.so()(64bit) for package: gettext-0.18.1.1-7.fc15.x86_64
---&gt; Processing Dependency: libgettextsrc-0.18.1.so()(64bit) for package: gettext-0.18.1.1-7.fc15.x86_64
---&gt; Processing Dependency: libgomp.so.1()(64bit) for package: gettext-0.18.1.1-7.fc15.x86_64
----&gt; Package gnutls-utils.x86_64 0:2.10.5-1.fc15 will be installed
----&gt; Package libnl.x86_64 0:1.1-14.fc15 will be installed
----&gt; Package nc.x86_64 0:1.100-3.fc15 will be installed
---&gt; Processing Dependency: libbsd.so.0(LIBBSD_0.0)(64bit) for package: nc-1.100-3.fc15.x86_64
---&gt; Processing Dependency: libbsd.so.0(LIBBSD_0.2)(64bit) for package: nc-1.100-3.fc15.x86_64
---&gt; Processing Dependency: libbsd.so.0()(64bit) for package: nc-1.100-3.fc15.x86_64
----&gt; Package netcf-libs.x86_64 0:0.1.9-1.fc15 will be installed
----&gt; Package numactl.x86_64 0:2.0.7-1.fc15 will be installed
----&gt; Package sg3_utils-libs.x86_64 0:1.29-3.fc15 will be installed
----&gt; Package xen-libs.x86_64 0:4.1.1-3.fc15 will be installed
---&gt; Processing Dependency: xen-licenses for package: xen-libs-4.1.1-3.fc15.x86_64
----&gt; Package yajl.x86_64 0:1.0.11-1.fc15 will be installed
---&gt; Running transaction check
----&gt; Package gettext-libs.x86_64 0:0.18.1.1-7.fc15 will be installed
----&gt; Package libbsd.x86_64 0:0.2.0-4.fc15 will be installed
----&gt; Package libgomp.x86_64 0:4.6.1-9.fc15 will be installed
----&gt; Package xen-licenses.x86_64 0:4.1.1-3.fc15 will be installed
---&gt; Finished Dependency Resolution
-
-Dependencies Resolved
-
-=============================================================================
- Package Arch Version Repository Size
-=============================================================================
-Installing:
- cman x86_64 3.1.7-1.fc15 updates 366 k
- gfs2-cluster x86_64 3.1.1-2.fc15 fedora 69 k
- gfs2-utils x86_64 3.1.1-2.fc15 fedora 222 k
-Installing for dependencies:
- augeas-libs x86_64 0.9.0-1.fc15 updates 311 k
- cyrus-sasl-md5 x86_64 2.1.23-18.fc15 updates 46 k
- fence-agents x86_64 3.1.5-1.fc15 updates 186 k
- gettext x86_64 0.18.1.1-7.fc15 fedora 1.0 M
- gettext-libs x86_64 0.18.1.1-7.fc15 fedora 610 k
- gnutls-utils x86_64 2.10.5-1.fc15 fedora 101 k
- ipmitool x86_64 1.8.11-6.fc15 fedora 273 k
- libbsd x86_64 0.2.0-4.fc15 fedora 37 k
- libgomp x86_64 4.6.1-9.fc15 updates 95 k
- libnl x86_64 1.1-14.fc15 fedora 118 k
- libvirt-client x86_64 0.8.8-7.fc15 updates 2.4 M
- modcluster x86_64 0.18.7-1.fc15 fedora 187 k
- nc x86_64 1.100-3.fc15 updates 24 k
- net-snmp-utils x86_64 1:5.6.1-7.fc15 fedora 180 k
- netcf-libs x86_64 0.1.9-1.fc15 updates 50 k
- nss-tools x86_64 3.12.10-6.fc15 updates 723 k
- numactl x86_64 2.0.7-1.fc15 updates 54 k
- oddjob x86_64 0.31-2.fc15 fedora 61 k
- openais x86_64 1.1.4-2.fc15 fedora 190 k
- openaislib x86_64 1.1.4-2.fc15 fedora 88 k
- parted x86_64 2.3-10.fc15 updates 618 k
- perl-Net-Telnet noarch 3.03-12.fc15 fedora 55 k
- pexpect noarch 2.3-6.fc15 fedora 141 k
- pyOpenSSL x86_64 0.10-3.fc15 fedora 198 k
- python-suds noarch 0.3.9-3.fc15 fedora 195 k
- ricci x86_64 0.18.7-1.fc15 fedora 584 k
- sg3_utils x86_64 1.29-3.fc15 fedora 465 k
- sg3_utils-libs x86_64 1.29-3.fc15 fedora 54 k
- xen-libs x86_64 4.1.1-3.fc15 updates 310 k
- xen-licenses x86_64 4.1.1-3.fc15 updates 64 k
- yajl x86_64 1.0.11-1.fc15 fedora 27 k
-
-Transaction Summary
-=============================================================================
-Install 34 Package(s)
-
-Total download size: 10 M
-Installed size: 38 M
-Downloading Packages:
-(1/34): augeas-libs-0.9.0-1.fc15.x86_64.rpm | 311 kB 00:00
-(2/34): cman-3.1.7-1.fc15.x86_64.rpm | 366 kB 00:00
-(3/34): cyrus-sasl-md5-2.1.23-18.fc15.x86_64.rpm | 46 kB 00:00
-(4/34): fence-agents-3.1.5-1.fc15.x86_64.rpm | 186 kB 00:00
-(5/34): gettext-0.18.1.1-7.fc15.x86_64.rpm | 1.0 MB 00:01
-(6/34): gettext-libs-0.18.1.1-7.fc15.x86_64.rpm | 610 kB 00:00
-(7/34): gfs2-cluster-3.1.1-2.fc15.x86_64.rpm | 69 kB 00:00
-(8/34): gfs2-utils-3.1.1-2.fc15.x86_64.rpm | 222 kB 00:00
-(9/34): gnutls-utils-2.10.5-1.fc15.x86_64.rpm | 101 kB 00:00
-(10/34): ipmitool-1.8.11-6.fc15.x86_64.rpm | 273 kB 00:00
-(11/34): libbsd-0.2.0-4.fc15.x86_64.rpm | 37 kB 00:00
-(12/34): libgomp-4.6.1-9.fc15.x86_64.rpm | 95 kB 00:00
-(13/34): libnl-1.1-14.fc15.x86_64.rpm | 118 kB 00:00
-(14/34): libvirt-client-0.8.8-7.fc15.x86_64.rpm | 2.4 MB 00:01
-(15/34): modcluster-0.18.7-1.fc15.x86_64.rpm | 187 kB 00:00
-(16/34): nc-1.100-3.fc15.x86_64.rpm | 24 kB 00:00
-(17/34): net-snmp-utils-5.6.1-7.fc15.x86_64.rpm | 180 kB 00:00
-(18/34): netcf-libs-0.1.9-1.fc15.x86_64.rpm | 50 kB 00:00
-(19/34): nss-tools-3.12.10-6.fc15.x86_64.rpm | 723 kB 00:00
-(20/34): numactl-2.0.7-1.fc15.x86_64.rpm | 54 kB 00:00
-(21/34): oddjob-0.31-2.fc15.x86_64.rpm | 61 kB 00:00
-(22/34): openais-1.1.4-2.fc15.x86_64.rpm | 190 kB 00:00
-(23/34): openaislib-1.1.4-2.fc15.x86_64.rpm | 88 kB 00:00
-(24/34): parted-2.3-10.fc15.x86_64.rpm | 618 kB 00:00
-(25/34): perl-Net-Telnet-3.03-12.fc15.noarch.rpm | 55 kB 00:00
-(26/34): pexpect-2.3-6.fc15.noarch.rpm | 141 kB 00:00
-(27/34): pyOpenSSL-0.10-3.fc15.x86_64.rpm | 198 kB 00:00
-(28/34): python-suds-0.3.9-3.fc15.noarch.rpm | 195 kB 00:00
-(29/34): ricci-0.18.7-1.fc15.x86_64.rpm | 584 kB 00:00
-(30/34): sg3_utils-1.29-3.fc15.x86_64.rpm | 465 kB 00:00
-(31/34): sg3_utils-libs-1.29-3.fc15.x86_64.rpm | 54 kB 00:00
-(32/34): xen-libs-4.1.1-3.fc15.x86_64.rpm | 310 kB 00:00
-(33/34): xen-licenses-4.1.1-3.fc15.x86_64.rpm | 64 kB 00:00
-(34/34): yajl-1.0.11-1.fc15.x86_64.rpm | 27 kB 00:00
------------------------------------------------------------------------------
-Total 803 kB/s | 10 MB 00:12
-Running rpm_check_debug
-Running Transaction Test
-Transaction Test Succeeded
-Running Transaction
- Installing : openais-1.1.4-2.fc15.x86_64 1/34
- Installing : openaislib-1.1.4-2.fc15.x86_64 2/34
- Installing : libnl-1.1-14.fc15.x86_64 3/34
- Installing : augeas-libs-0.9.0-1.fc15.x86_64 4/34
- Installing : oddjob-0.31-2.fc15.x86_64 5/34
- Installing : modcluster-0.18.7-1.fc15.x86_64 6/34
- Installing : netcf-libs-0.1.9-1.fc15.x86_64 7/34
- Installing : 1:net-snmp-utils-5.6.1-7.fc15.x86_64 8/34
- Installing : sg3_utils-libs-1.29-3.fc15.x86_64 9/34
- Installing : sg3_utils-1.29-3.fc15.x86_64 10/34
- Installing : libgomp-4.6.1-9.fc15.x86_64 11/34
- Installing : gnutls-utils-2.10.5-1.fc15.x86_64 12/34
- Installing : pyOpenSSL-0.10-3.fc15.x86_64 13/34
- Installing : parted-2.3-10.fc15.x86_64 14/34
- Installing : cyrus-sasl-md5-2.1.23-18.fc15.x86_64 15/34
- Installing : python-suds-0.3.9-3.fc15.noarch 16/34
- Installing : ipmitool-1.8.11-6.fc15.x86_64 17/34
- Installing : perl-Net-Telnet-3.03-12.fc15.noarch 18/34
- Installing : numactl-2.0.7-1.fc15.x86_64 19/34
- Installing : yajl-1.0.11-1.fc15.x86_64 20/34
- Installing : gettext-libs-0.18.1.1-7.fc15.x86_64 21/34
- Installing : gettext-0.18.1.1-7.fc15.x86_64 22/34
- Installing : libbsd-0.2.0-4.fc15.x86_64 23/34
- Installing : nc-1.100-3.fc15.x86_64 24/34
- Installing : xen-licenses-4.1.1-3.fc15.x86_64 25/34
- Installing : xen-libs-4.1.1-3.fc15.x86_64 26/34
- Installing : libvirt-client-0.8.8-7.fc15.x86_64 27/34
-
-Note: This output shows SysV services only and does not include native
- systemd services. SysV configuration data might be overridden by native
- systemd configuration.
-
- Installing : nss-tools-3.12.10-6.fc15.x86_64 28/34
- Installing : ricci-0.18.7-1.fc15.x86_64 29/34
- Installing : pexpect-2.3-6.fc15.noarch 30/34
- Installing : fence-agents-3.1.5-1.fc15.x86_64 31/34
- Installing : cman-3.1.7-1.fc15.x86_64 32/34
- Installing : gfs2-cluster-3.1.1-2.fc15.x86_64 33/34
- Installing : gfs2-utils-3.1.1-2.fc15.x86_64 34/34
-
-Installed:
- cman.x86_64 0:3.1.7-1.fc15 gfs2-cluster.x86_64 0:3.1.1-2.fc15
- gfs2-utils.x86_64 0:3.1.1-2.fc15
-
-Dependency Installed:
- augeas-libs.x86_64 0:0.9.0-1.fc15
- cyrus-sasl-md5.x86_64 0:2.1.23-18.fc15
- fence-agents.x86_64 0:3.1.5-1.fc15
- gettext.x86_64 0:0.18.1.1-7.fc15
- gettext-libs.x86_64 0:0.18.1.1-7.fc15
- gnutls-utils.x86_64 0:2.10.5-1.fc15
- ipmitool.x86_64 0:1.8.11-6.fc15
- libbsd.x86_64 0:0.2.0-4.fc15
- libgomp.x86_64 0:4.6.1-9.fc15
- libnl.x86_64 0:1.1-14.fc15
- libvirt-client.x86_64 0:0.8.8-7.fc15
- modcluster.x86_64 0:0.18.7-1.fc15
- nc.x86_64 0:1.100-3.fc15
- net-snmp-utils.x86_64 1:5.6.1-7.fc15
- netcf-libs.x86_64 0:0.1.9-1.fc15
- nss-tools.x86_64 0:3.12.10-6.fc15
- numactl.x86_64 0:2.0.7-1.fc15
- oddjob.x86_64 0:0.31-2.fc15
- openais.x86_64 0:1.1.4-2.fc15
- openaislib.x86_64 0:1.1.4-2.fc15
- parted.x86_64 0:2.3-10.fc15
- perl-Net-Telnet.noarch 0:3.03-12.fc15
- pexpect.noarch 0:2.3-6.fc15
- pyOpenSSL.x86_64 0:0.10-3.fc15
- python-suds.noarch 0:0.3.9-3.fc15
- ricci.x86_64 0:0.18.7-1.fc15
- sg3_utils.x86_64 0:1.29-3.fc15
- sg3_utils-libs.x86_64 0:1.29-3.fc15
- xen-libs.x86_64 0:4.1.1-3.fc15
- xen-licenses.x86_64 0:4.1.1-3.fc15
- yajl.x86_64 0:1.0.11-1.fc15
-
-Complete!
-[root@pcmk-1 ~]#
- </screen>
- </section>
- <section>
- <title>Configuring CMAN</title>
- <para>
- The first thing we need to do, is tell CMAN complete starting up even without quorum.
- We can do this by changing the quorum timeout setting:
- </para>
- <screen>
-[root@pcmk-1 ~]# <userinput>sed -i.sed "s/.*CMAN_QUORUM_TIMEOUT=.*/CMAN_QUORUM_TIMEOUT=0/g" /etc/sysconfig/cman</userinput>
- </screen>
-
- <para>
- Next we create a basic configuration file and place is in <filename>/etc/cluster/cluster.conf</filename>.
- The <constant>name</constant> used for each <constant>clusternode</constant> should correspond to that node's <command>uname -n</command>, just as Pacemaker expects.
- The <constant>nodeid</constant> can be any positive mumber but nust be unique.
- <example>
- <title>Basic cluster.conf for a two-node cluster</title>
- <programlisting>
- <![CDATA[
-<?xml version="1.0"?>
-<cluster config_version="1" name="my_cluster_name">
- <logging debug="off"/>
- <clusternodes>
- <clusternode name="pcmk-1" nodeid="1"/>
- <clusternode name="pcmk-2" nodeid="2"/>
- </clusternodes>
-</cluster>
- ]]>
- </programlisting>
- </example>
- </para>
- </section>
- <section>
- <title>Configuring CMAN Fencing</title>
- <para>
- We configure the <filename>fence_pcmk</filename> agent (supplied with Pacemaker) to redirect any fencing requests from CMAN components (such as dlm_controld) to Pacemaker.
- Pacemaker's fencing subsystem lets other parts of the stack know that a node has been successfully fenced, thus avoiding the need for it to be fenced again when other subsystems notice the node is gone.
- <warning>
- <para>
- Configuring real fencing devices in CMAN will result in nodes being fenced multiple times as different parts of the stack notice the node is missing or failed.
- </para>
- </warning>
- </para>
- <para>
- The definition should be placed in the <constant>fencedevices</constant> section and contain:
- <programlisting>
- <![CDATA[
- <fencedevice name="pcmk" agent="fence_pcmk"/>
- ]]>
- </programlisting>
- Each <constant>clusternode</constant> must be configured to use this <quote>device</quote> by adding a <constant>fence method</constant> block that lists the node's <constant>name</constant> as the <constant>port</constant>.
- <programlisting>
- <![CDATA[
- <fence>
- <method name="pcmk-redirect">
- <device name="pcmk" port="node_name_here"/>
- </method>
- </fence>
- ]]>
- </programlisting>
- </para>
- <para>
- Putting everything together, we have:
- <example>
- <title>cluster.conf for a two-node cluster with fencing</title>
- <programlisting>
- <![CDATA[
-<?xml version="1.0"?>
-<cluster config_version="1" name="mycluster">
- <logging debug="off"/>
- <clusternodes>
- <clusternode name="pcmk-1" nodeid="1">
- <fence>
- <method name="pcmk-redirect">
- <device name="pcmk" port="pcmk-1"/>
- </method>
- </fence>
- </clusternode>
- <clusternode name="pcmk-2" nodeid="2">
- <fence>
- <method name="pcmk-redirect">
- <device name="pcmk" port="pcmk-2"/>
- </method>
- </fence>
- </clusternode>
- </clusternodes>
- <fencedevices>
- <fencedevice name="pcmk" agent="fence_pcmk"/>
- </fencedevices>
-</cluster>
- ]]>
- </programlisting>
- </example>
- </para>
- </section>
- <section>
- <title>Bringing the Cluster Online with CMAN</title>
- <para>
- The first thing to do is check that the configuration is valid
- <screen>
-[root@pcmk-1 ~]# <userinput>ccs_config_validate</userinput>
-Configuration validates
- </screen>
- </para>
- <para>
- Now start CMAN
- <screen>
-[root@pcmk-1 ~]# <userinput>service cman start</userinput>
-Starting cluster:
- Checking Network Manager... [ OK ]
- Global setup... [ OK ]
- Loading kernel modules... [ OK ]
- Mounting configfs... [ OK ]
- Starting cman... [ OK ]
- Waiting for quorum... [ OK ]
- Starting fenced... [ OK ]
- Starting dlm_controld... [ OK ]
- Starting gfs_controld... [ OK ]
- Unfencing self... [ OK ]
- Joining fence domain... [ OK ]
-[root@pcmk-1 ~]# <userinput>crm_mon -1</userinput>
- </screen>
- </para>
- <para>
- Once you have confirmed that the first node is happily online, start the second node.
- <screen>
-[root@pcmk-2 ~]# <userinput>service cman start</userinput>
-Starting cluster:
- Checking Network Manager... [ OK ]
- Global setup... [ OK ]
- Loading kernel modules... [ OK ]
- Mounting configfs... [ OK ]
- Starting cman... [ OK ]
- Waiting for quorum... [ OK ]
- Starting fenced... [ OK ]
- Starting dlm_controld... [ OK ]
- Starting gfs_controld... [ OK ]
- Unfencing self... [ OK ]
- Joining fence domain... [ OK ]
-[root@pcmk-1 ~]# <userinput>cman_tool nodes</userinput>
-Node Sts Inc Joined Name
- 1 M 548 2011-09-28 10:52:21 pcmk-1
- 2 M 548 2011-09-28 10:52:21 pcmk-2
-[root@pcmk-1 ~]# <userinput>crm_mon -1</userinput>
- </screen>
- You should now see both nodes online and services started.
- </para>
- </section>
- </section>
- <section id="gfs-create-filesystem">
- <title>Create a GFS2 Filesystem</title>
- <section>
- <title>Preparation</title>
- <para>
- Before we do anything to the existing partition, we need to make sure it is unmounted. We do this by tell the cluster to stop the WebFS resource. This will ensure that other resources (in our case, Apache) using WebFS are not only stopped, but stopped in the correct order.
- </para>
-
-<screen>
-[root@pcmk-1 ~]# <userinput>crm_resource --resource WebFS --set-parameter target-role --meta --parameter-value Stopped</userinput>
-[root@pcmk-1 ~]# <userinput>crm_mon</userinput>
-============
-Last updated: Thu Sep  3 15:18:06 2009
-Stack: openais
-Current DC: pcmk-1 - partition with quorum
-Version: 1.1.5-bdd89e69ba545404d02445be1f3d72e6a203ba2f
-2 Nodes configured, 2 expected votes
-6 Resources configured.
-============
-
-Online: [ pcmk-1 pcmk-2 ]
-
-Master/Slave Set: WebDataClone
-        Masters: [ pcmk-1 ]
-        Slaves: [ pcmk-2 ]
-ClusterIP        (ocf::heartbeat:IPaddr):        Started pcmk-1
-</screen>
- <note>
- <para>
- Note that both Apache and WebFS have been stopped.
- </para>
- </note>
- </section>
-
- <section>
- <title>Create and Populate an GFS2 Partition</title>
- <para>
- Now that the cluster stack and integration pieces are running smoothly, we can create an GFS2 partition.
- </para>
- <warning>
- <para>
- This will erase all previous content stored on the DRBD device. Ensure you have a copy of any important data.
- </para>
- </warning>
- <para>
- We need to specify a number of additional parameters when creating a GFS2 partition.
- </para>
- <para>
- First we must use the -p option to specify that we want to use the the Kernel’s DLM. Next we use -j to indicate that it should reserve enough space for two journals (one per node accessing the filesystem).
- </para>
- <para>
- Lastly, we use -t to specify the lock table name. The format for this field is clustername:fsname. For the fsname, we just need to pick something unique and descriptive and since we haven’t specified a clustername yet, we will use the default (pcmk).
- </para>
- <para>
- To specify an alternate name for the cluster, locate the service section containing "name: pacemaker" in corosync.conf and insert the following line anywhere inside the block:
- </para>
- <para>
- clustername: myname
- </para>
- <para>
- Do this on each node in the cluster and be sure to restart them before continuing.
- </para>
-
-<screen>
-[root@pcmk-1 ~]# <userinput>mkfs.gfs2 -p lock_dlm -j 2 -t pcmk:web /dev/drbd1</userinput>
-This will destroy any data on /dev/drbd1.
-It appears to contain: data
-
-Are you sure you want to proceed? [y/n] y
-
-Device:                    /dev/drbd1
-Blocksize:                 4096
-Device Size                1.00 GB (131072 blocks)
-Filesystem Size:           1.00 GB (131070 blocks)
-Journals:                  2
-Resource Groups:           2
-Locking Protocol:          "lock_dlm"
-Lock Table:                "pcmk:web"
-UUID:                      6B776F46-177B-BAF8-2C2B-292C0E078613
-
-[root@pcmk-1 ~]#
-</screen>
- <para>
- Then (re)populate the new filesystem with data (web pages). For now we’ll create another variation on our home page.
- </para>
-
-<screen>
-[root@pcmk-1 ~]# <userinput>mount /dev/drbd1 /mnt/</userinput>
-[root@pcmk-1 ~]# <userinput>cat &lt;&lt;-END &gt;/mnt/index.html</userinput>
-&lt;html&gt;
-&lt;body&gt;My Test Site - GFS2&lt;/body&gt;
-&lt;/html&gt;
-END
-[root@pcmk-1 ~]# <userinput>umount /dev/drbd1</userinput>
-[root@pcmk-1 ~]# <userinput>drbdadm verify wwwdata</userinput>
-[root@pcmk-1 ~]#
-</screen>
- </section>
-
- </section>
-
- <section>
- <title>Reconfigure the Cluster for GFS2</title>
-
-<screen>
-[root@pcmk-1 ~]# <userinput>crm</userinput>
-crm(live)# <userinput>cib new GFS2</userinput>
-INFO: GFS2 shadow CIB created
-crm(GFS2)# <userinput>configure delete WebFS</userinput>
-crm(GFS2)# <userinput>configure primitive WebFS ocf:heartbeat:Filesystem params device="/dev/drbd/by-res/wwwdata" directory="/var/www/html" fstype="gfs2"</userinput>
-</screen>
- <para>
- Now that we’ve recreated the resource, we also need to recreate all the constraints that used it. This is because the shell will automatically remove any constraints that referenced WebFS.
- </para>
-
-<screen>
-crm(GFS2)# <userinput>configure colocation WebSite-with-WebFS inf: WebSite WebFS</userinput>
-crm(GFS2)# <userinput>configure colocation fs_on_drbd inf: WebFS WebDataClone:Master</userinput>
-crm(GFS2)# <userinput>configure order WebFS-after-WebData inf: WebDataClone:promote WebFS:start</userinput>
-crm(GFS2)# <userinput>configure order WebSite-after-WebFS inf: WebFS WebSite</userinput>
-crm(GFS2)# <userinput>configure show</userinput>
-node pcmk-1
-node pcmk-2
-primitive WebData ocf:linbit:drbd \
-        params drbd_resource="wwwdata" \
-        op monitor interval="60s"
-<emphasis>primitive WebFS ocf:heartbeat:Filesystem \</emphasis>
-<emphasis> params device="/dev/drbd/by-res/wwwdata" directory="/var/www/html" fstype="gfs2"</emphasis>
-primitive WebSite ocf:heartbeat:apache \
-        params configfile="/etc/httpd/conf/httpd.conf" \
-        op monitor interval="1min"
-primitive ClusterIP ocf:heartbeat:IPaddr2 \
-        params ip="192.168.122.101" cidr_netmask="32" \
-        op monitor interval="30s"
-ms WebDataClone WebData \
-        meta master-max="1" master-node-max="1" clone-max="2" clone-node-max="1" notify="true"
-colocation WebSite-with-WebFS inf: WebSite WebFS
-colocation fs_on_drbd inf: WebFS WebDataClone:Master
-colocation website-with-ip inf: WebSite ClusterIP
-order WebFS-after-WebData inf: WebDataClone:promote WebFS:start
-order WebSite-after-WebFS inf: WebFS WebSite
-order apache-after-ip inf: ClusterIP WebSite
-property $id="cib-bootstrap-options" \
-        dc-version="1.1.5-bdd89e69ba545404d02445be1f3d72e6a203ba2f" \
-        cluster-infrastructure="openais" \
-        expected-quorum-votes="2" \
-        stonith-enabled="false" \
-        no-quorum-policy="ignore"
-rsc_defaults $id="rsc-options" \
-        resource-stickiness="100"
-</screen>
- <para>
- Review the configuration before uploading it to the cluster, quitting the shell and watching the cluster’s response
- </para>
-
-<screen>
-crm(GFS2)# <userinput>cib commit GFS2</userinput>
-INFO: commited 'GFS2' shadow CIB to the cluster
-crm(GFS2)# <userinput>quit</userinput>
-bye
-[root@pcmk-1 ~]# <userinput>crm_mon</userinput>
-============
-Last updated: Thu Sep  3 20:49:54 2009
-Stack: openais
-Current DC: pcmk-2 - partition with quorum
-Version: 1.1.5-bdd89e69ba545404d02445be1f3d72e6a203ba2f
-2 Nodes configured, 2 expected votes
-6 Resources configured.
-============
-
-Online: [ pcmk-1 pcmk-2 ]
-
-WebSite (ocf::heartbeat:apache):        Started pcmk-2
-Master/Slave Set: WebDataClone
-        Masters: [ pcmk-1 ]
-        Slaves: [ pcmk-2 ]
-ClusterIP        (ocf::heartbeat:IPaddr):        Started pcmk-2
-<emphasis>WebFS (ocf::heartbeat:Filesystem): Started pcmk-1</emphasis>
-</screen>
- </section>
- <section>
- <title>Reconfigure Pacemaker for Active/Active</title>
- <para>
- Almost everything is in place.
- Recent versions of DRBD are capable of operating in Primary/Primary mode and the filesystem we’re using is cluster aware.
- All we need to do now is reconfigure the cluster to take advantage of this.
- </para>
- <para>
- This will involve a number of changes, so we’ll again use interactive mode.
- </para>
-
- <screen>
-[root@pcmk-1 ~]# <userinput>crm</userinput>
-[root@pcmk-1 ~]# <userinput>cib new active</userinput>
- </screen>
- <para>
- There’s no point making the services active on both locations if we can’t reach them, so lets first clone the IP address.
- Cloned IPaddr2 resources use an iptables rule to ensure that each request only processed by one of the two clone instances.
- The additional meta options tell the cluster how many instances of the clone we want (one "request bucket" for each node) and that if all other nodes fail, then the remaining node should hold all of them.
- Otherwise the requests would be simply discarded.
- </para>
- <screen>
-[root@pcmk-1 ~]# <userinput>configure clone WebIP ClusterIP  \</userinput>
-<userinput>        meta globally-unique="true" clone-max="2" clone-node-max="2"</userinput>
- </screen>
- <para>
- Now we must tell the ClusterIP how to decide which requests are processed by which hosts.
- To do this we must specify the clusterip_hash parameter.
- </para>
- <para>
- Open the ClusterIP resource
- </para>
- <screen>[root@pcmk-1 ~]# <userinput>configure edit  ClusterIP</userinput></screen>
- <para>
- And add the following to the params line
- </para>
- <screen>clusterip_hash="sourceip"</screen>
- <para>
- So that the complete definition looks like:
- </para>
- <screen>
-primitive ClusterIP ocf:heartbeat:IPaddr2 \
-        params ip="192.168.122.101" cidr_netmask="32" clusterip_hash="sourceip" \
-        op monitor interval="30s"
- </screen>
- <para>
- Here is the full transcript
- </para>
- <screen>
-[root@pcmk-1 ~]# <userinput>crm </userinput>
-crm(live)# <userinput>cib new active</userinput>
-INFO: active shadow CIB created
-crm(active)# <userinput>configure clone WebIP ClusterIP  \</userinput>
-        meta globally-unique="true" clone-max="2" clone-node-max="2"
-crm(active)# <userinput>configure show</userinput>
-node pcmk-1
-node pcmk-2
-primitive WebData ocf:linbit:drbd \
-        params drbd_resource="wwwdata" \
-        op monitor interval="60s"
-primitive WebFS ocf:heartbeat:Filesystem \
-        params device="/dev/drbd/by-res/wwwdata" directory="/var/www/html" fstype="gfs2"
-primitive WebSite ocf:heartbeat:apache \
-        params configfile="/etc/httpd/conf/httpd.conf" \
-        op monitor interval="1min"
-primitive ClusterIP ocf:heartbeat:IPaddr2 \
-        params ip="192.168.122.101" cidr_netmask="32" clusterip_hash="sourceip" \
-        op monitor interval="30s"
-ms WebDataClone WebData \
-        meta master-max="1" master-node-max="1" clone-max="2" clone-node-max="1" notify="true"
-<emphasis>clone WebIP ClusterIP \</emphasis>
-<emphasis> meta globally-unique="true" clone-max="2" clone-node-max="2"</emphasis>
-colocation WebSite-with-WebFS inf: WebSite WebFS
-colocation fs_on_drbd inf: WebFS WebDataClone:Master
-<emphasis>colocation website-with-ip inf: WebSite WebIP</emphasis>
-order WebFS-after-WebData inf: WebDataClone:promote WebFS:start
-order WebSite-after-WebFS inf: WebFS WebSite
-<emphasis>order apache-after-ip inf: WebIP WebSite</emphasis>
-property $id="cib-bootstrap-options" \
-        dc-version="1.1.5-bdd89e69ba545404d02445be1f3d72e6a203ba2f" \
-        cluster-infrastructure="openais" \
-        expected-quorum-votes="2" \
-        stonith-enabled="false" \
-        no-quorum-policy="ignore"
-rsc_defaults $id="rsc-options" \
-        resource-stickiness="100"
- </screen>
- <para>
- Notice how any constraints that referenced ClusterIP have been updated to use WebIP instead.
- This is an additional benefit of using the crm shell.
- </para>
- <para>
- Next we need to convert the filesystem and Apache resources into clones.
- Again, the shell will automatically update any relevant constraints.
- </para>
- <screen>
-crm(active)# <userinput>configure clone WebFSClone WebFS</userinput>
-crm(active)# <userinput>configure clone WebSiteClone WebSite</userinput>
- </screen>
- <para>
- The last step is to tell the cluster that it is now allowed to promote both instances to be Primary (aka. Master).
- </para>
- <screen>
-crm(active)# <userinput>configure edit WebDataClone</userinput>
- </screen>
- <para>
- Change master-max to 2
- </para>
- <screen>
-crm(active)# <userinput>configure show</userinput>
-node pcmk-1
-node pcmk-2
-primitive WebData ocf:linbit:drbd \
-        params drbd_resource="wwwdata" \
-        op monitor interval="60s"
-primitive WebFS ocf:heartbeat:Filesystem \
-        params device="/dev/drbd/by-res/wwwdata" directory="/var/www/html" fstype="gfs2"
-primitive WebSite ocf:heartbeat:apache \
-        params configfile="/etc/httpd/conf/httpd.conf" \
-        op monitor interval="1min"
-primitive ClusterIP ocf:heartbeat:IPaddr2 \
-        params ip="192.168.122.101" cidr_netmask="32" clusterip_hash="sourceip" \
-        op monitor interval="30s"
-ms WebDataClone WebData \
-        meta master-max="2" master-node-max="1" clone-max="2" clone-node-max="1" notify="true"
-<emphasis>clone WebFSClone WebFS</emphasis>
-clone WebIP ClusterIP  \
-        meta globally-unique="true" clone-max="2" clone-node-max="2"
-<emphasis>clone WebSiteClone WebSite</emphasis>
-<emphasis>colocation WebSite-with-WebFS inf: WebSiteClone WebFSClone</emphasis>
-<emphasis>colocation fs_on_drbd inf: WebFSClone WebDataClone:Master</emphasis>
-<emphasis>colocation website-with-ip inf: WebSiteClone WebIP</emphasis>
-<emphasis>order WebFS-after-WebData inf: WebDataClone:promote WebFSClone:start</emphasis>
-<emphasis>order WebSite-after-WebFS inf: WebFSClone WebSiteClone</emphasis>
-<emphasis>order apache-after-ip inf: WebIP WebSiteClone</emphasis>
-property $id="cib-bootstrap-options" \
-        dc-version="1.1.5-bdd89e69ba545404d02445be1f3d72e6a203ba2f" \
-        cluster-infrastructure="openais" \
-        expected-quorum-votes="2" \
-        stonith-enabled="false" \
-        no-quorum-policy="ignore"
-rsc_defaults $id="rsc-options" \
-        resource-stickiness="100"
- </screen>
- <para>
- Review the configuration before uploading it to the cluster, quitting the shell and watching the cluster’s response
- </para>
- <screen>
-crm(active)# <userinput>cib commit active</userinput>
-INFO: commited 'active' shadow CIB to the cluster
-crm(active)# <userinput>quit</userinput>
-bye
-[root@pcmk-1 ~]# <userinput>crm_mon</userinput>
-============
-Last updated: Thu Sep  3 21:37:27 2009
-Stack: openais
-Current DC: pcmk-2 - partition with quorum
-Version: 1.1.5-bdd89e69ba545404d02445be1f3d72e6a203ba2f
-2 Nodes configured, 2 expected votes
-6 Resources configured.
-============
-
-Online: [ pcmk-1 pcmk-2 ]
-
-Master/Slave Set: WebDataClone
-        Masters: [ pcmk-1 pcmk-2 ]
-<emphasis>Clone Set: WebIP</emphasis>
-<emphasis> Started: [ pcmk-1 pcmk-2 ]</emphasis>
-<emphasis>Clone Set: WebFSClone</emphasis>
-<emphasis> Started: [ pcmk-1 pcmk-2 ]</emphasis>
-<emphasis>Clone Set: WebSiteClone</emphasis>
-<emphasis> Started: [ pcmk-1 pcmk-2 ]</emphasis>
- </screen>
- <section>
- <title>Testing Recovery</title>
- <note>
- <para>
- TODO: Put one node into standby to demonstrate failover
- </para>
- </note>
- </section>
- </section>
-</chapter>
-
diff --git a/doc/Clusters_from_Scratch/en-US/Ch-Shared-Storage.txt b/doc/Clusters_from_Scratch/en-US/Ch-Shared-Storage.txt
new file mode 100644
index 0000000000..b18fe1025a
--- /dev/null
+++ b/doc/Clusters_from_Scratch/en-US/Ch-Shared-Storage.txt
@@ -0,0 +1,518 @@
+= Replicated Storage with DRBD =
+
+== Background ==
+Even if you're serving up static websites, having to manually synchronize
+the contents of that website to all the machines in the cluster is not
+ideal. For dynamic websites, such as a wiki, its not even an option. Not
+everyone care afford network-attached storage but somehow the data needs
+to be kept in sync. Enter DRBD which can be thought of as network based
+RAID-1. See http://www.drbd.org/ for more details.
+
+== Install the DRBD Packages ==
+
+Since its inclusion in the upstream 2.6.33 kernel, everything needed to
+use DRBD ships with Fedora 13. All you need to do is install it:
+
+[source,Bash]
+----
+# yum install -y drbd-pacemaker drbd-udev
+Loaded plugins: presto, refresh-packagekit
+Setting up Install Process
+Resolving Dependencies
+--> Running transaction check
+---> Package drbd-pacemaker.x86_64 0:8.3.7-2.fc13 set to be updated
+--> Processing Dependency: drbd-utils = 8.3.7-2.fc13 for package: drbd-pacemaker-8.3.7-2.fc13.x86_64
+--> Running transaction check
+---> Package drbd-utils.x86_64 0:8.3.7-2.fc13 set to be updated
+--> Finished Dependency Resolution
+
+Dependencies Resolved
+
+=================================================================================
+ Package Arch Version Repository Size
+=================================================================================
+Installing:
+ drbd-pacemaker x86_64 8.3.7-2.fc13 fedora 19 k
+Installing for dependencies:
+ drbd-utils x86_64 8.3.7-2.fc13 fedora 165 k
+
+Transaction Summary
+=================================================================================
+Install 2 Package(s)
+Upgrade 0 Package(s)
+
+Total download size: 184 k
+Installed size: 427 k
+Downloading Packages:
+Setting up and reading Presto delta metadata
+fedora/prestodelta | 1.7 kB 00:00
+Processing delta metadata
+Package(s) data still to download: 184 k
+(1/2): drbd-pacemaker-8.3.7-2.fc13.x86_64.rpm | 19 kB 00:01
+(2/2): drbd-utils-8.3.7-2.fc13.x86_64.rpm | 165 kB 00:02
+ ---------------------------------------------------------------------------------
+Total 45 kB/s | 184 kB 00:04
+Running rpm_check_debug
+Running Transaction Test
+Transaction Test Succeeded
+Running Transaction
+ Installing : drbd-utils-8.3.7-2.fc13.x86_64 1/2
+ Installing : drbd-pacemaker-8.3.7-2.fc13.x86_64 2/2
+
+Installed:
+ drbd-pacemaker.x86_64 0:8.3.7-2.fc13
+
+Dependency Installed:
+ drbd-utils.x86_64 0:8.3.7-2.fc13
+
+Complete!
+----
+
+== Configure DRBD ==
+
+Before we configure DRBD, we need to set aside some disk for it to use.
+
+=== Create A Partition for DRBD ===
+
+If you have more than 1Gb free, feel free to use it. For this guide
+however, 1Gb is plenty of space for a single html file and sufficient for
+later holding the GFS2 metadata.
+
+[source,Bash]
+----
+# lvcreate -n drbd-demo -L 1G VolGroup
+Logical volume "drbd-demo" created
+# lvs
+LV VG Attr LSize Origin Snap% Move Log Copy% Convert
+drbd-demo VolGroup -wi-a- 1.00G
+lv_root VolGroup -wi-ao 7.30G
+lv_swap VolGroup -wi-ao 500.00M
+----
+
+Repeat this on the second node, be sure to use the same size partition.
+
+[source,Bash]
+----
+# ssh pcmk-2 -- lvs
+LV VG Attr LSize Origin Snap% Move Log Copy% Convert
+lv_root VolGroup -wi-ao 7.30G
+lv_swap VolGroup -wi-ao 500.00M
+# ssh pcmk-2 -- lvcreate -n drbd-demo -L 1G VolGroup
+Logical volume "drbd-demo" created
+# ssh pcmk-2 -- lvs
+LV VG Attr LSize Origin Snap% Move Log Copy% Convert
+drbd-demo VolGroup -wi-a- 1.00G
+lv_root VolGroup -wi-ao 7.30G
+lv_swap VolGroup -wi-ao 500.00M
+----
+
+=== Write the DRBD Config ===
+
+There is no series of commands for build a DRBD configuration, so simply
+copy the configuration below to /etc/drbd.conf
+
+Detailed information on the directives used in this configuration (and
+other alternatives) is available from
+http://www.drbd.org/users-guide/ch-configure.html
+
+[WARNING]
+=========
+
+Be sure to use the names and addresses of your nodes if they differ from
+the ones used in this guide.
+
+=========
+
+....
+global {
+ usage-count yes;
+}
+common {
+ protocol C;
+}
+resource wwwdata {
+ meta-disk internal;
+ device /dev/drbd1;
+ syncer {
+ verify-alg sha1;
+ }
+ net {
+ allow-two-primaries;
+ }
+ on pcmk-1 {
+ disk /dev/mapper/VolGroup-drbd--demo;
+ address 192.168.122.101:7789;
+ }
+ on pcmk-2 {
+ disk /dev/mapper/VolGroup-drbd--demo;
+ address 192.168.122.102:7789;
+ }
+}
+....
+
+[NOTE]
+=======
+
+TODO: Explain the reason for the allow-two-primaries option
+
+=======
+
+=== Initialize and Load DRBD ===
+
+With the configuration in place, we can now perform the DRBD
+initialization
+
+[source,Bash]
+----
+# drbdadm create-md wwwdata
+md_offset 12578816
+al_offset 12546048
+bm_offset 12541952
+
+Found some data
+==> This might destroy existing data! <==
+
+Do you want to proceed?
+[need to type 'yes' to confirm] yes
+Writing meta data...
+initializing activity log
+NOT initialized bitmap
+New drbd meta data block successfully created.
+success
+----
+
+Now load the DRBD kernel module and confirm that everything is sane
+
+[source,Bash]
+----
+# modprobe drbd# drbdadm up wwwdata# cat /proc/drbdversion: 8.3.6 (api:88/proto:86-90)
+GIT-hash: f3606c47cc6fcf6b3f086e425cb34af8b7a81bbf build by root@pcmk-1, 2009-12-08 11:22:57
+ 1: cs:WFConnection ro:Secondary/Unknown ds:Inconsistent/DUnknown C r----
+ ns:0 nr:0 dw:0 dr:0 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:12248
+----
+
+Repeat on the second node
+
+[source,Bash]
+----
+# ssh pcmk-2 -- drbdadm --force create-md wwwdata
+Writing meta data...
+initializing activity log
+NOT initialized bitmap
+New drbd meta data block successfully created.
+success
+# ssh pcmk-2 -- modprobe drbd
+WARNING: Deprecated config file /etc/modprobe.conf, all config files belong into /etc/modprobe.d/.
+# ssh pcmk-2 -- drbdadm up wwwdata
+# ssh pcmk-2 -- cat /proc/drbd
+version: 8.3.6 (api:88/proto:86-90)
+GIT-hash: f3606c47cc6fcf6b3f086e425cb34af8b7a81bbf build by root@pcmk-1, 2009-12-08 11:22:57
+ 1: cs:Connected ro:Secondary/Secondary ds:Inconsistent/Inconsistent C r----
+ ns:0 nr:0 dw:0 dr:0 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:12248
+----
+
+Now we need to tell DRBD which set of data to use. Since both sides
+contain garbage, we can run the following on pcmk-1:
+
+[source,Bash]
+----
+# drbdadm -- --overwrite-data-of-peer primary wwwdata
+# cat /proc/drbd
+version: 8.3.6 (api:88/proto:86-90)
+GIT-hash: f3606c47cc6fcf6b3f086e425cb34af8b7a81bbf build by root@pcmk-1, 2009-12-08 11:22:57
+1: cs:SyncSource ro:Primary/Secondary ds:UpToDate/Inconsistent C r----
+ ns:2184 nr:0 dw:0 dr:2472 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:10064
+ [=====>..............] sync'ed: 33.4% (10064/12248)K
+ finish: 0:00:37 speed: 240 (240) K/sec
+# cat /proc/drbd
+version: 8.3.6 (api:88/proto:86-90)
+GIT-hash: f3606c47cc6fcf6b3f086e425cb34af8b7a81bbf build by root@pcmk-1, 2009-12-08 11:22:57
+1: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r----
+ ns:12248 nr:0 dw:0 dr:12536 al:0 bm:1 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:0
+----
+
+pcmk-1 is now in the Primary state which allows it to be written to.
+Which means its a good point at which to create a filesystem and populate
+it with some data to serve up via our WebSite resource.
+
+
+=== Populate DRBD with Data ===
+
+[source,Bash]
+----
+# mkfs.ext4 /dev/drbd1
+mke2fs 1.41.4 (27-Jan-2009)
+Filesystem label=
+OS type: Linux
+Block size=1024 (log=0)
+Fragment size=1024 (log=0)
+3072 inodes, 12248 blocks
+612 blocks (5.00%) reserved for the super user
+First data block=1
+Maximum filesystem blocks=12582912
+2 block groups
+8192 blocks per group, 8192 fragments per group
+1536 inodes per group
+Superblock backups stored on blocks:
+ 8193
+
+Writing inode tables: done
+Creating journal (1024 blocks): done
+Writing superblocks and filesystem accounting information: done
+
+This filesystem will be automatically checked every 26 mounts or
+180 days, whichever comes first. Use tune2fs -c or -i to override.
+----
+
+Now mount the newly created filesystem so we can create our index file
+
+[source,Bash]
+----
+# mount /dev/drbd1 /mnt/
+# cat <<-END >/mnt/index.html
+ <html>
+ <body>My Test Site - drbd</body>
+ </html>
+ END
+# umount /dev/drbd1
+----
+
+== Configure the Cluster for DRBD ==
+
+One handy feature of the crm shell is that you can use it in
+interactive mode to make several changes atomically.
+
+First we launch the shell. The prompt will change to indicate you're
+in interactive mode.
+
+[source,Bash]
+----
+# crm cib
+crm(live) #
+----
+
+Next we must create a working copy or the current configuration. This is
+where all our changes will go. The cluster will not see any of them until
+we say its ok. Notice again how the prompt changes, this time to indicate
+that we're no longer looking at the live cluster.
+
+[source,Bash]
+----
+cib crm(live) # cib new drbd
+INFO: drbd shadow CIB created
+crm(drbd) #
+----
+
+Now we can create our DRBD clone and display the revised configuration.
+
+[source,Bash]
+----
+crm(drbd) # configure primitive WebData ocf:linbit:drbd params drbd_resource=wwwdata \
+ op monitor interval=60s
+crm(drbd) # configure ms WebDataClone WebData meta master-max=1 master-node-max=1 \
+ clone-max=2 clone-node-max=1 notify=truecrm(drbd) # configure shownode pcmk-1
+node pcmk-2primitive WebData ocf:linbit:drbd \
+ params drbd_resource="wwwdata" \
+ op monitor interval="60s"primitive WebSite ocf:heartbeat:apache \
+ params configfile="/etc/httpd/conf/httpd.conf" \
+ op monitor interval="1min"
+primitive ClusterIP ocf:heartbeat:IPaddr2 \
+ params ip="192.168.122.101" cidr_netmask="32" \
+ op monitor interval="30s"ms WebDataClone WebData \
+ meta master-max="1" master-node-max="1" clone-max="2" clone-node-max="1" notify="true"
+location prefer-pcmk-1 WebSite 50: pcmk-1
+colocation website-with-ip inf: WebSite ClusterIP
+order apache-after-ip inf: ClusterIP WebSite
+property $id="cib-bootstrap-options" \
+ dc-version="1.1.5-bdd89e69ba545404d02445be1f3d72e6a203ba2f" \
+ cluster-infrastructure="openais" \
+ expected-quorum-votes="2" \
+ stonith-enabled="false" \
+ no-quorum-policy="ignore"
+rsc_defaults $id="rsc-options" \
+ resource-stickiness="100"
+----
+
+Once we're happy with the changes, we can tell the cluster to start using
+them and use crm_mon to check everything is functioning.
+
+[source,Bash]
+----
+crm(drbd) # cib commit drbdINFO: commited 'drbd' shadow CIB to the cluster
+crm(drbd) # quitbye
+# crm_mon
+============
+Last updated: Tue Sep 1 09:37:13 2009
+Stack: openais
+Current DC: pcmk-1 - partition with quorum
+Version: 1.1.5-bdd89e69ba545404d02445be1f3d72e6a203ba2f
+2 Nodes configured, 2 expected votes
+3 Resources configured.
+============
+
+Online: [ pcmk-1 pcmk-2 ]
+
+ClusterIP (ocf::heartbeat:IPaddr): Started pcmk-1
+WebSite (ocf::heartbeat:apache): Started pcmk-1Master/Slave Set: WebDataClone Masters: [ pcmk-2 ] Slaves: [ pcmk-1 ]
+----
+
+[NOTE]
+=======
+
+Include details on adding a second DRBD resource
+
+=======
+
+Now that DRBD is functioning we can configure a Filesystem resource to
+use it. In addition to the filesystem's definition, we also need to
+tell the cluster where it can be located (only on the DRBD Primary)
+and when it is allowed to start (after the Primary was promoted).
+
+Once again we'll use the shell's interactive mode
+
+[source,Bash]
+----
+# crm
+crm(live) # cib new fs
+INFO: fs shadow CIB created
+crm(fs) # configure primitive WebFS ocf:heartbeat:Filesystem \
+ params device="/dev/drbd/by-res/wwwdata" directory="/var/www/html" fstype="ext4"
+crm(fs) # configure colocation fs_on_drbd inf: WebFS WebDataClone:Master
+crm(fs) # configure order WebFS-after-WebData inf: WebDataClone:promote WebFS:start
+
+We also need to tell the cluster that Apache needs to run on the same
+machine as the filesystem and that it must be active before Apache can
+start.
+
+crm(fs) # configure colocation WebSite-with-WebFS inf: WebSite WebFS
+crm(fs) # configure order WebSite-after-WebFS inf: WebFS WebSite
+----
+
+Time to review the updated configuration:
+
+[source,Bash]
+----
+crm(fs) # crm configure show
+node pcmk-1
+node pcmk-2
+primitive WebData ocf:linbit:drbd \
+ params drbd_resource="wwwdata" \
+ op monitor interval="60s"
+primitive WebFS ocf:heartbeat:Filesystem \
+ params device="/dev/drbd/by-res/wwwdata" directory="/var/www/html" fstype="ext4"
+primitive WebSite ocf:heartbeat:apache \
+ params configfile="/etc/httpd/conf/httpd.conf" \
+ op monitor interval="1min"
+primitive ClusterIP ocf:heartbeat:IPaddr2 \
+ params ip="192.168.122.101" cidr_netmask="32" \
+ op monitor interval="30s"
+ms WebDataClone WebData \
+ meta master-max="1" master-node-max="1" clone-max="2" clone-node-max="1" notify="true"
+location prefer-pcmk-1 WebSite 50: pcmk-1
+colocation WebSite-with-WebFS inf: WebSite WebFS
+colocation fs_on_drbd inf: WebFS WebDataClone:Master
+colocation website-with-ip inf: WebSite ClusterIP
+order WebFS-after-WebData inf: WebDataClone:promote WebFS:start
+order WebSite-after-WebFS inf: WebFS WebSite
+order apache-after-ip inf: ClusterIP WebSite
+property $id="cib-bootstrap-options" \
+ dc-version="1.1.5-bdd89e69ba545404d02445be1f3d72e6a203ba2f" \
+ cluster-infrastructure="openais" \
+ expected-quorum-votes="2" \
+ stonith-enabled="false" \
+ no-quorum-policy="ignore"
+rsc_defaults $id="rsc-options" \
+ resource-stickiness="100"
+----
+
+After reviewing the new configuration, we again upload it and watch the
+cluster put it into effect.
+
+[source,Bash]
+----
+crm(fs) # cib commit fs
+INFO: commited 'fs' shadow CIB to the cluster
+crm(fs) # quit
+bye
+# crm_mon
+============
+Last updated: Tue Sep 1 10:08:44 2009
+Stack: openais
+Current DC: pcmk-1 - partition with quorum
+Version: 1.1.5-bdd89e69ba545404d02445be1f3d72e6a203ba2f
+2 Nodes configured, 2 expected votes
+4 Resources configured.
+============
+
+Online: [ pcmk-1 pcmk-2 ]
+
+ClusterIP (ocf::heartbeat:IPaddr): Started pcmk-1
+WebSite (ocf::heartbeat:apache): Started pcmk-1
+Master/Slave Set: WebDataClone
+ Masters: [ pcmk-1 ]
+ Slaves: [ pcmk-2 ]
+WebFS (ocf::heartbeat:Filesystem): Started pcmk-1
+----
+
+=== Testing Migration ===
+
+We could shut down the active node again, but another way to safely
+simulate recovery is to put the node into what is called "standby
+mode". Nodes in this state tell the cluster that they are not allowed
+to run resources. Any resources found active there will be moved
+elsewhere. This feature can be particularly useful when updating the
+resources' packages.
+
+Put the local node into standby mode and observe the cluster move all
+the resources to the other node. Note also that the node's status will
+change to indicate that it can no longer host resources.
+
+[source,Bash]
+----
+# crm node standby
+# crm_mon
+============
+Last updated: Tue Sep 1 10:09:57 2009
+Stack: openais
+Current DC: pcmk-1 - partition with quorum
+Version: 1.1.5-bdd89e69ba545404d02445be1f3d72e6a203ba2f
+2 Nodes configured, 2 expected votes
+4 Resources configured.
+============
+Node pcmk-1: standbyOnline: [ pcmk-2 ]
+
+ClusterIP (ocf::heartbeat:IPaddr): Started pcmk-2
+WebSite (ocf::heartbeat:apache): Started pcmk-2
+Master/Slave Set: WebDataClone
+ Masters: [ pcmk-2 ] Stopped: [ WebData:1 ]
+WebFS (ocf::heartbeat:Filesystem): Started pcmk-2
+----
+
+Once we've done everything we needed to on pcmk-1 (in this case nothing,
+we just wanted to see the resources move), we can allow the node to be a
+full cluster member again.
+
+[source,Bash]
+----
+# crm node online
+# crm_mon
+============
+Last updated: Tue Sep 1 10:13:25 2009
+Stack: openais
+Current DC: pcmk-1 - partition with quorum
+Version: 1.1.5-bdd89e69ba545404d02445be1f3d72e6a203ba2f
+2 Nodes configured, 2 expected votes
+4 Resources configured.
+============
+Online: [ pcmk-1 pcmk-2 ]
+ClusterIP (ocf::heartbeat:IPaddr): Started pcmk-2
+WebSite (ocf::heartbeat:apache): Started pcmk-2
+Master/Slave Set: WebDataClone
+ Masters: [ pcmk-2 ]
+ Slaves: [ pcmk-1 ]
+WebFS (ocf::heartbeat:Filesystem): Started pcmk-2
+----
+
+Notice that our resource stickiness settings prevent the services from
+migrating back to pcmk-1.
+
diff --git a/doc/Clusters_from_Scratch/en-US/Ch-Shared-Storage.xml b/doc/Clusters_from_Scratch/en-US/Ch-Shared-Storage.xml
deleted file mode 100644
index 4460ed52c9..0000000000
--- a/doc/Clusters_from_Scratch/en-US/Ch-Shared-Storage.xml
+++ /dev/null
@@ -1,528 +0,0 @@
-<?xml version='1.0' encoding='utf-8' ?>
-<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
-<!ENTITY % BOOK_ENTITIES SYSTEM "Clusters_from_Scratch.ent">
-%BOOK_ENTITIES;
-]>
-<chapter>
- <title>Replicated Storage with DRBD</title>
- <para>
- Even if you’re serving up static websites, having to manually synchronize the contents of that website to all the machines in the cluster is not ideal.
- For dynamic websites, such as a wiki, its not even an option.
- Not everyone care afford network-attached storage but somehow the data needs to be kept in sync.
- Enter DRBD which can be thought of as network based RAID-1.
- See <ulink url="http://www.drbd.org/">http://www.drbd.org</ulink>/ for more details.
- </para>
- <para>
- </para>
- <section>
- <title>Install the DRBD Packages</title>
- <para>
- Since its inclusion in the upstream 2.6.33 kernel, everything needed to use DRBD ships with &DISTRO; &DISTRO_VERSION;.
- All you need to do is install it:
- </para>
- <screen>
-[root@pcmk-1 ~]# <userinput>yum install -y drbd-pacemaker drbd-udev</userinput>
-Loaded plugins: presto, refresh-packagekit
-Setting up Install Process
-Resolving Dependencies
---> Running transaction check
----> Package drbd-pacemaker.x86_64 0:8.3.7-2.fc13 set to be updated
---> Processing Dependency: drbd-utils = 8.3.7-2.fc13 for package: drbd-pacemaker-8.3.7-2.fc13.x86_64
---> Running transaction check
----> Package drbd-utils.x86_64 0:8.3.7-2.fc13 set to be updated
---> Finished Dependency Resolution
-
-Dependencies Resolved
-
-=================================================================================
- Package Arch Version Repository Size
-=================================================================================
-Installing:
- drbd-pacemaker x86_64 8.3.7-2.fc13 fedora 19 k
-Installing for dependencies:
- drbd-utils x86_64 8.3.7-2.fc13 fedora 165 k
-
-Transaction Summary
-=================================================================================
-Install 2 Package(s)
-Upgrade 0 Package(s)
-
-Total download size: 184 k
-Installed size: 427 k
-Downloading Packages:
-Setting up and reading Presto delta metadata
-fedora/prestodelta | 1.7 kB 00:00
-Processing delta metadata
-Package(s) data still to download: 184 k
-(1/2): drbd-pacemaker-8.3.7-2.fc13.x86_64.rpm | 19 kB 00:01
-(2/2): drbd-utils-8.3.7-2.fc13.x86_64.rpm | 165 kB 00:02
----------------------------------------------------------------------------------
-Total 45 kB/s | 184 kB 00:04
-Running rpm_check_debug
-Running Transaction Test
-Transaction Test Succeeded
-Running Transaction
- Installing : drbd-utils-8.3.7-2.fc13.x86_64 1/2
- Installing : drbd-pacemaker-8.3.7-2.fc13.x86_64 2/2
-
-Installed:
- drbd-pacemaker.x86_64 0:8.3.7-2.fc13
-
-Dependency Installed:
- drbd-utils.x86_64 0:8.3.7-2.fc13
-
-Complete!
-[root@pcmk-1 ~]#
- </screen>
- </section>
- <section>
- <title>Configure DRBD</title>
- <para>
- Before we configure DRBD, we need to set aside some disk for it to use.
- </para>
- <section>
- <title>Create A Partition for DRBD</title>
- <para>
- If you have more than 1Gb free, feel free to use it.
- For this guide however, 1Gb is plenty of space for a single html file and sufficient for later holding the GFS2 metadata.
- </para>
- <screen>
-[root@pcmk-1 ~]# <userinput>lvcreate -n drbd-demo -L 1G VolGroup</userinput>
-  Logical volume "drbd-demo" created
-[root@pcmk-1 ~]# <userinput>lvs</userinput>
-  LV        VG       Attr   LSize   Origin Snap%  Move Log Copy%  Convert
-  <emphasis>drbd-demo VolGroup -wi-a- 1.00G</emphasis>                                      
-  lv_root   VolGroup -wi-ao   7.30G                                      
-  lv_swap   VolGroup -wi-ao 500.00M
- </screen>
- <para>
- Repeat this on the second node, be sure to use the same size partition.
- </para>
-
- <screen>
-[root@pcmk-2 ~]# <userinput>lvs</userinput>
-  LV      VG       Attr   LSize   Origin Snap%  Move Log Copy%  Convert
-  lv_root VolGroup -wi-ao   7.30G                                      
-  lv_swap <emphasis>VolGroup</emphasis> -wi-ao 500.00M                                      
-[root@pcmk-2 ~]# <userinput>lvcreate -n drbd-demo -L 1G VolGroup</userinput>
- <emphasis> Logical volume "drbd-demo" created</emphasis>
-[root@pcmk-2 ~]# <userinput>lvs</userinput>
-  LV        VG       Attr   LSize   Origin Snap%  Move Log Copy%  Convert
-  <emphasis>drbd-demo VolGroup -wi-a- 1.00G </emphasis>                                     
-  lv_root   VolGroup -wi-ao   7.30G                                      
-  lv_swap   VolGroup -wi-ao 500.00M
- </screen>
- </section>
-
- <section>
- <title>Write the DRBD Config</title>
- <para>
- There is no series of commands for build a DRBD configuration, so simply copy the configuration below to /etc/drbd.conf
- </para>
- <para>
- Detailed information on the directives used in this configuration (and other alternatives) is available from <ulink url="http://www.drbd.org/users-guide/ch-configure.html">http://www.drbd.org/users-guide/ch-configure.html</ulink>
- </para>
- <warning>
- <para>
- Be sure to use the names and addresses of <emphasis>your</emphasis> nodes if they differ from the ones used in this guide.
- </para>
- </warning>
- <screen>
-global {
-  usage-count yes;
-}
-common {
-  protocol C;
-}
-resource wwwdata {
-  meta-disk internal;
-  device    /dev/drbd1;
-  syncer {
-    verify-alg sha1;
-  }
-  net {
-    allow-two-primaries;
-  }
- <emphasis> on pcmk-1</emphasis> {
-    disk      /dev/mapper/<emphasis>VolGroup</emphasis>-drbd--demo;
-    address   192.168.122.101<emphasis>:7789;</emphasis>
-  }
-  <emphasis>on</emphasis>
-<emphasis>pcmk-2</emphasis> {
-    disk      /dev/mapper/<emphasis>VolGroup</emphasis>-drbd--demo;
-    address   192.168.122.102<emphasis>:7789;</emphasis>
-  }
-}
- </screen>
- <note>
- <para>
- TODO: Explain the reason for the allow-two-primaries option
- </para>
- </note>
- </section>
-
- <section>
- <title>Initialize and Load DRBD</title>
- <para>
- With the configuration in place, we can now perform the DRBD initialization
- </para>
- <screen>
-[root@pcmk-1 ~]# <userinput>drbdadm create-md wwwdata</userinput>
-md_offset 12578816
-al_offset 12546048
-bm_offset 12541952
-
-Found some data
- ==&gt; This might destroy existing data! &lt;==
-
-Do you want to proceed?
-[need to type 'yes' to confirm] <userinput>yes</userinput>
-
-Writing meta data...
-initializing activity log
-NOT initialized bitmap
-New drbd meta data block successfully created.
-success
- </screen>
- <para>
- Now load the DRBD kernel module and confirm that everything is sane
- </para>
- <screen>
-[root@pcmk-1 ~]# <userinput>modprobe drbd</userinput>
-[root@pcmk-1 ~]# <userinput>drbdadm up wwwdata</userinput>
-[root@pcmk-1 ~]# <userinput>cat /proc/drbd</userinput>
-version: 8.3.6 (api:88/proto:86-90)
-GIT-hash: f3606c47cc6fcf6b3f086e425cb34af8b7a81bbf build by root@pcmk-1, 2009-12-08 11:22:57
-
-<emphasis> 1: cs:WFConnection ro:Secondary/Unknown ds:Inconsistent/DUnknown C r--</emphasis>--
-    ns:0 nr:0 dw:0 dr:0 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:12248
-[root@pcmk-1 ~]#
-
-Repeat on the second node
-drbdadm --force create-md wwwdata
-modprobe drbd
-drbdadm up wwwdata
-cat /proc/drbd
-[root@pcmk-2 ~]# <userinput>drbdadm --force create-md wwwdata</userinput>
-Writing meta data...
-initializing activity log
-NOT initialized bitmap
-New drbd meta data block successfully created.
-success
-[root@pcmk-2 ~]# <userinput>modprobe drbd</userinput>
-WARNING: Deprecated config file /etc/modprobe.conf, all config files belong into /etc/modprobe.d/.
-[root@pcmk-2 ~]# <userinput>drbdadm up wwwdata</userinput>
-[root@pcmk-2 ~]# <userinput>cat /proc/drbd</userinput>
-version: 8.3.6 (api:88/proto:86-90)
-GIT-hash: f3606c47cc6fcf6b3f086e425cb34af8b7a81bbf build by root@pcmk-1, 2009-12-08 11:22:57
-
-<emphasis> 1: cs:Connected ro:Secondary/Secondary ds:Inconsistent/Inconsistent C r----</emphasis>
-    ns:0 nr:0 dw:0 dr:0 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:12248
- </screen>
- <para>
- Now we need to tell DRBD which set of data to use.
- Since both sides contain garbage, we can run the following on pcmk-1:
- </para>
- <screen>
-[root@pcmk-1 ~]# <userinput>drbdadm -- --overwrite-data-of-peer primary wwwdata</userinput>
-[root@pcmk-1 ~]# <userinput>cat /proc/drbd</userinput>
-version: 8.3.6 (api:88/proto:86-90)
-GIT-hash: f3606c47cc6fcf6b3f086e425cb34af8b7a81bbf build by root@pcmk-1, 2009-12-08 11:22:57
- 1: cs:SyncSource ro:Primary/Secondary ds:UpToDate/<emphasis>Inconsistent</emphasis> C r----
-    ns:2184 nr:0 dw:0 dr:2472 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:10064
-        [=====&gt;..............] sync'ed: 33.4% (10064/12248)K
-        finish: 0:00:37 speed: 240 (240) K/sec
-[root@pcmk-1 ~]# <userinput>cat /proc/drbd</userinput>
-version: 8.3.6 (api:88/proto:86-90)
-GIT-hash: f3606c47cc6fcf6b3f086e425cb34af8b7a81bbf build by root@pcmk-1, 2009-12-08 11:22:57
- 1: <emphasis>cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate</emphasis> C r----
-    ns:12248 nr:0 dw:0 dr:12536 al:0 bm:1 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:0
- </screen>
- <para>
- pcmk-1 is now in the Primary state which allows it to be written to.
- Which means its a good point at which to create a filesystem and populate it with some data to serve up via our WebSite resource.
- </para>
- </section>
- <section>
- <title>Populate DRBD with Data</title>
- <screen>
-[root@pcmk-1 ~]# <userinput>mkfs.ext4 /dev/drbd1</userinput>
-mke2fs 1.41.4 (27-Jan-2009)
-Filesystem label=
-OS type: Linux
-Block size=1024 (log=0)
-Fragment size=1024 (log=0)
-3072 inodes, 12248 blocks
-612 blocks (5.00%) reserved for the super user
-First data block=1
-Maximum filesystem blocks=12582912
-2 block groups
-8192 blocks per group, 8192 fragments per group
-1536 inodes per group
-Superblock backups stored on blocks:
-        8193
-
-Writing inode tables: done                            
-Creating journal (1024 blocks): done
-Writing superblocks and filesystem accounting information: done
-
-This filesystem will be automatically checked every 26 mounts or
-180 days, whichever comes first.  Use tune2fs -c or -i to override.
-
-Now mount the newly created filesystem so we can create our index file
-mount /dev/drbd1 /mnt/
-cat &lt;&lt;-END &gt;/mnt/index.html
-&lt;html&gt;
-&lt;body&gt;My Test Site - drbd&lt;/body&gt;
-&lt;/html&gt;
-END
-umount /dev/drbd1
-[root@pcmk-1 ~]# <userinput>mount /dev/drbd1 /mnt/</userinput>
-[root@pcmk-1 ~]# <userinput>cat &lt;&lt;-END &gt;/mnt/index.html</userinput>
-&gt; &lt;html&gt;
-&gt; &lt;body&gt;My Test Site - drbd&lt;/body&gt;
-&gt; &lt;/html&gt;
-&gt; END
-[root@pcmk-1 ~]# <userinput>umount /dev/drbd1</userinput>
- </screen>
- </section>
- </section>
- <section>
- <title>Configure the Cluster for DRBD</title>
- <para>
- One handy feature of the crm shell is that you can use it in interactive mode to make several changes atomically.
- </para>
- <para>
- First we launch the shell. The prompt will change to indicate you’re in interactive mode.
- </para>
- <screen>
-[root@pcmk-1 ~]# <userinput>crm</userinput>
-cib crm(live)#
- </screen>
- <para>
- Next we must create a working copy or the current configuration.
- This is where all our changes will go.
- The cluster will not see any of them until we say its ok.
- Notice again how the prompt changes, this time to indicate that we’re no longer looking at the live cluster.
- </para>
- <screen>
-cib crm(live)# <userinput>cib new drbd</userinput>
-INFO: drbd shadow CIB created
-crm(drbd)#
- </screen>
- <para>
- Now we can create our DRBD clone and display the revised configuration.
- </para>
- <screen>
-crm(drbd)# <userinput>configure primitive WebData ocf:linbit:drbd params drbd_resource=wwwdata \</userinput>
-<userinput>        op monitor interval=60s</userinput>
-crm(drbd)# <userinput>configure ms WebDataClone WebData meta master-max=1 master-node-max=1 \</userinput>
-<userinput>        clone-max=2 clone-node-max=1 notify=true</userinput>
-crm(drbd)# <userinput>configure show</userinput>
-node pcmk-1
-node pcmk-2
-<emphasis>primitive WebData ocf:linbit:drbd \</emphasis>
-<emphasis> params drbd_resource="wwwdata" \</emphasis>
-<emphasis> op monitor interval="60s"</emphasis>
-primitive WebSite ocf:heartbeat:apache \
-        params configfile="/etc/httpd/conf/httpd.conf" \
-        op monitor interval="1min"
-primitive ClusterIP ocf:heartbeat:IPaddr2 \
-        params ip="192.168.122.101" cidr_netmask="32" \
-        op monitor interval="30s"
-<emphasis>ms WebDataClone WebData \</emphasis>
-<emphasis> meta master-max="1" master-node-max="1" clone-max="2" clone-node-max="1" notify="true"</emphasis>
-location prefer-pcmk-1 WebSite 50: pcmk-1
-colocation website-with-ip inf: WebSite ClusterIP
-order apache-after-ip inf: ClusterIP WebSite
-property $id="cib-bootstrap-options" \
-        dc-version="1.1.5-bdd89e69ba545404d02445be1f3d72e6a203ba2f" \
-        cluster-infrastructure="openais" \
-        expected-quorum-votes="2" \
-        stonith-enabled="false" \
-        no-quorum-policy="ignore"
-rsc_defaults $id="rsc-options" \
-        resource-stickiness="100"
- </screen>
- <para>
- Once we’re happy with the changes, we can tell the cluster to start using them and use crm_mon to check everything is functioning.
- </para>
- <screen>
-crm(drbd)# <userinput>cib commit drbd</userinput>
-INFO: commited 'drbd' shadow CIB to the cluster
-crm(drbd)# <userinput>quit</userinput>
-bye
-[root@pcmk-1 ~]# <userinput>crm_mon</userinput>
-============
-Last updated: Tue Sep  1 09:37:13 2009
-Stack: openais
-Current DC: pcmk-1 - partition with quorum
-Version: 1.1.5-bdd89e69ba545404d02445be1f3d72e6a203ba2f
-2 Nodes configured, 2 expected votes
-3 Resources configured.
-============
-
-Online: [ pcmk-1 pcmk-2 ]
-
-ClusterIP        (ocf::heartbeat:IPaddr):        Started pcmk-1
-WebSite (ocf::heartbeat:apache):        Started pcmk-1
-<emphasis>Master/Slave Set: WebDataClone</emphasis>
-<emphasis> Masters: [ pcmk-2 ]</emphasis>
-<emphasis> Slaves: [ pcmk-1 ]</emphasis>
- </screen>
- <note>
- <para>
- Include details on adding a second DRBD resource
- </para>
- </note>
- <para>
- Now that DRBD is functioning we can configure a Filesystem resource to use it.
- In addition to the filesystem’s definition, we also need to tell the cluster where it can be located (only on the DRBD Primary) and when it is allowed to start (after the Primary was promoted).
- </para>
- <para>
- Once again we’ll use the shell’s interactive mode
- </para>
- <screen>
-[root@pcmk-1 ~]# <userinput>crm</userinput>
-crm(live)# <userinput>cib new fs</userinput>
-INFO: fs shadow CIB created
-crm(fs)# <userinput>configure primitive WebFS ocf:heartbeat:Filesystem \</userinput>
-<userinput>        params device="/dev/drbd/by-res/wwwdata" directory="/var/www/html" fstype="ext4"</userinput>
-crm(fs)# <userinput>configure colocation fs_on_drbd inf: WebFS WebDataClone:Master</userinput>
-crm(fs)# <userinput>configure order WebFS-after-WebData inf: WebDataClone:promote WebFS:start</userinput>
- </screen>
- <para>
- We also need to tell the cluster that Apache needs to run on the same machine as the filesystem and that it must be active before Apache can start.
- </para>
- <screen>
-crm(fs)# <userinput>configure colocation WebSite-with-WebFS inf: WebSite WebFS</userinput>
-crm(fs)# <userinput>configure order WebSite-after-WebFS inf: WebFS WebSite</userinput>
- </screen>
- <para>
- Time to review the updated configuration:
- </para>
- <screen>
-[root@pcmk-1 ~]# <userinput>crm configure show</userinput>
-node pcmk-1
-node pcmk-2
-primitive WebData ocf:linbit:drbd \
-        params drbd_resource="wwwdata" \
-        op monitor interval="60s"
-primitive WebFS ocf:heartbeat:Filesystem \
-        params device="/dev/drbd/by-res/wwwdata" directory="/var/www/html" fstype="ext4"
-primitive WebSite ocf:heartbeat:apache \
-        params configfile="/etc/httpd/conf/httpd.conf" \
-        op monitor interval="1min"
-primitive ClusterIP ocf:heartbeat:IPaddr2 \
-        params ip="192.168.122.101" cidr_netmask="32" \
-        op monitor interval="30s"
-ms WebDataClone WebData \
-        meta master-max="1" master-node-max="1" clone-max="2" clone-node-max="1" notify="true"
-location prefer-pcmk-1 WebSite 50: pcmk-1
-colocation WebSite-with-WebFS inf: WebSite WebFS
-colocation fs_on_drbd inf: WebFS WebDataClone:Master
-colocation website-with-ip inf: WebSite ClusterIP
-order WebFS-after-WebData inf: WebDataClone:promote WebFS:start
-order WebSite-after-WebFS inf: WebFS WebSite
-order apache-after-ip inf: ClusterIP WebSite
-property $id="cib-bootstrap-options" \
-        dc-version="1.1.5-bdd89e69ba545404d02445be1f3d72e6a203ba2f" \
-        cluster-infrastructure="openais" \
-        expected-quorum-votes="2" \
-        stonith-enabled="false" \
-        no-quorum-policy="ignore"
-rsc_defaults $id="rsc-options" \
-        resource-stickiness="100"
- </screen>
- <para>
- After reviewing the new configuration, we again upload it and watch the cluster put it into effect.
- </para>
- <screen>
-crm(fs)# <userinput>cib commit fs</userinput>
-INFO: commited 'fs' shadow CIB to the cluster
-crm(fs)# <userinput>quit</userinput>
-bye
-[root@pcmk-1 ~]# <userinput>crm_mon</userinput>
-============
-Last updated: Tue Sep  1 10:08:44 2009
-Stack: openais
-Current DC: pcmk-1 - partition with quorum
-Version: 1.1.5-bdd89e69ba545404d02445be1f3d72e6a203ba2f
-2 Nodes configured, 2 expected votes
-4 Resources configured.
-============
-
-Online: [ pcmk-1 pcmk-2 ]
-
-ClusterIP        (ocf::heartbeat:IPaddr):        Started pcmk-1
-<emphasis>WebSite (ocf::heartbeat:apache): Started pcmk-1</emphasis>
-Master/Slave Set: WebDataClone
-        Masters: [ pcmk-1 ]
-        Slaves: [ pcmk-2 ]
-<emphasis>WebFS (ocf::heartbeat:Filesystem): Started pcmk-1</emphasis>
- </screen>
- <section>
- <title>Testing Migration</title>
- <para>
- We could shut down the active node again, but another way to safely simulate recovery is to put the node into what is called "standby mode".
- Nodes in this state tell the cluster that they are not allowed to run resources.
- Any resources found active there will be moved elsewhere.
- This feature can be particularly useful when updating the resources’ packages.
- </para>
- <para>
- Put the local node into standby mode and observe the cluster move all the resources to the other node.
- Note also that the node’s status will change to indicate that it can no longer host resources.
- </para>
- <screen>
-[root@pcmk-1 ~]# <userinput>crm node standby</userinput>
-[root@pcmk-1 ~]# <userinput>crm_mon</userinput>
-============
-Last updated: Tue Sep  1 10:09:57 2009
-Stack: openais
-Current DC: pcmk-1 - partition with quorum
-Version: 1.1.5-bdd89e69ba545404d02445be1f3d72e6a203ba2f
-2 Nodes configured, 2 expected votes
-4 Resources configured.
-============
-
-<emphasis>Node pcmk-1: standby</emphasis>
-Online: [ pcmk-2 ]
-
-ClusterIP        (ocf::heartbeat:IPaddr):        <emphasis>Started pcmk-2</emphasis>
-WebSite (ocf::heartbeat:apache):        <emphasis>Started pcmk-2</emphasis>
-Master/Slave Set: WebDataClone
-        <emphasis>Masters: [ pcmk-2 ]</emphasis>
-        Stopped: [ WebData:1 ]
-WebFS   (ocf::heartbeat:Filesystem):    <emphasis>Started pcmk-2</emphasis>
- </screen>
- <para>
- Once we’ve done everything we needed to on pcmk-1 (in this case nothing, we just wanted to see the resources move), we can allow the node to be a full cluster member again.
- </para>
- <screen>
-[root@pcmk-1 ~]# <userinput>crm node online</userinput>
-[root@pcmk-1 ~]# <userinput>crm_mon</userinput>
-============
-Last updated: Tue Sep  1 10:13:25 2009
-Stack: openais
-Current DC: pcmk-1 - partition with quorum
-Version: 1.1.5-bdd89e69ba545404d02445be1f3d72e6a203ba2f
-2 Nodes configured, 2 expected votes
-4 Resources configured.
-============
-
-<emphasis>Online: [ pcmk-1 pcmk-2 ]</emphasis>
-
-ClusterIP        (ocf::heartbeat:IPaddr):        Started pcmk-2
-WebSite (ocf::heartbeat:apache):        Started pcmk-2
-Master/Slave Set: WebDataClone
-        Masters: [ pcmk-2 ]
-        Slaves: [ pcmk-1 ]
-WebFS   (ocf::heartbeat:Filesystem):    Started pcmk-2
- </screen>
- <para>
- Notice that our resource stickiness settings prevent the services from migrating back to pcmk-1.
- </para>
- </section>
- </section>
-</chapter>
-

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