diff --git a/heartbeat/LVM b/heartbeat/LVM index 0d05dbd05..7d86fb417 100755 --- a/heartbeat/LVM +++ b/heartbeat/LVM @@ -1,672 +1,691 @@ #!/bin/sh # # # LVM # # Description: Manages an LVM volume as an HA resource # # # Author: Alan Robertson # Support: linux-ha@lists.linux-ha.org # License: GNU General Public License (GPL) # Copyright: (C) 2002 - 2005 International Business Machines, Inc. # # This code significantly inspired by the LVM resource # in FailSafe by Lars Marowsky-Bree # # # An example usage in /etc/ha.d/haresources: # node1 10.0.0.170 ServeRAID::1::1 LVM::myvolname # # See usage() function below for more details... # # OCF parameters are as below: # OCF_RESKEY_volgrpname # ####################################################################### # Initialization: : ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/lib/heartbeat} . ${OCF_FUNCTIONS_DIR}/ocf-shellfuncs ####################################################################### usage() { methods=`LVM_methods` methods=`echo $methods | tr ' ' '|'` cat < 1.0 Resource script for LVM. It manages an Linux Volume Manager volume (LVM) as an HA resource. Controls the availability of an LVM Volume Group The name of volume group. Volume group name If set, the volume group will be activated exclusively. This option works one of two ways. If the volume group has the cluster attribute set, then the volume group will be activated exclusively using clvmd across the cluster. If the cluster attribute is not set, the volume group will be activated exclusively using a tag and the volume_list filter. When the tag option is in use, the volume_list in lvm.con must be initialized. This can be as simple as setting 'volume_list = []' depending on your setup. Exclusive activation If "exclusive" is set on a non clustered volume group, this overrides the tag to be used. Exclusive activation tag If set, the volume group will be activated even only partial of the physical volumes available. It helps to set to true, when you are using mirroring logical volumes. Activate VG even with partial PV only EOF } # # methods: What methods/operations do we support? # LVM_methods() { cat < /dev/null 2>&1 if [ $? -ne 0 ]; then return fi ## # Now check to see if the initrd has been updated. # If not, the machine could boot and activate the VG outside # the control of pacemaker ## if [ "$(find /boot -name *.img -newer /etc/lvm/lvm.conf)" = "" ]; then ocf_log warn "LVM: Improper setup detected" ocf_log warn "* initrd image needs to be newer than lvm.conf" # While dangerous if not done the first time, there are many # cases where we don't simply want to fail here. Instead, # keep warning until the user remakes the initrd - or has # it done for them by upgrading the kernel. # # initrd can be updated using this command. # dracut -H -f /boot/initramfs-$(uname -r).img $(uname -r) # fi } ## # does this vg have our tag ## check_tags() { local owner=`vgs -o tags --noheadings $OCF_RESKEY_volgrpname | tr -d ' '` if [ -z "$owner" ]; then # No-one owns this VG yet return 1 fi if [ "$OUR_TAG" = "$owner" ]; then # yep, this is ours return 0 fi # some other tag is set on this vg return 2 } strip_tags() { local i for i in `vgs --noheadings -o tags $OCF_RESKEY_volgrpname | sed s/","/" "/g`; do ocf_log info "Stripping tag, $i" # LVM version 2.02.98 allows changing tags if PARTIAL vgchange --deltag $i $OCF_RESKEY_volgrpname done if [ ! -z `vgs -o tags --noheadings $OCF_RESKEY_volgrpname | tr -d ' '` ]; then ocf_log err "Failed to remove ownership tags from $OCF_RESKEY_volgrpname" return $OCF_ERR_GENERIC fi return $OCF_SUCCESS } set_tags() { check_tags case $? in 0) # we already own it. return $OCF_SUCCESS ;; 2) # other tags are set, strip them before setting if ! strip_tags; then return $OCF_ERR_GENERIC fi ;; *) : ;; esac vgchange --addtag $OUR_TAG $OCF_RESKEY_volgrpname if [ $? -ne 0 ]; then ocf_log err "Failed to add ownership tag to $OCF_RESKEY_volgrpname" return $OCF_ERR_GENERIC fi ocf_log info "New tag \"$OUR_TAG\" added to $OCF_RESKEY_volgrpname" return $OCF_SUCCESS } # # Return LVM status (silently) # LVM_status() { local rc=1 loglevel="debug" # Set the log level of the error message if [ "X${2}" = "X" ]; then loglevel="err" if ocf_is_probe; then loglevel="warn" else if [ ${OP_METHOD} = "stop" ]; then loglevel="info" fi fi fi if [ -d /dev/$1 ]; then test "`cd /dev/$1 && ls`" != "" rc=$? if [ $rc -ne 0 ]; then ocf_log err "VG $1 with no logical volumes is not supported by this RA!" fi fi if [ $rc -ne 0 ]; then ocf_log $loglevel "LVM Volume $1 is not available (stopped)" rc=$OCF_NOT_RUNNING else case $(get_vg_mode) in 1) # exclusive with tagging. # If vg is running, make sure the correct tag is present. Otherwise we # can not guarantee exclusive activation. if ! check_tags; then ocf_log err "WARNING: $OCF_RESKEY_volgrpname is active without the cluster tag, \"$OUR_TAG\"" rc=$OCF_ERR_GENERIC fi # make sure the environment for tags activation is still valid if ! verify_tags_environment; then rc=$OCF_ERR_GENERIC fi # let the user know if their initrd is older than lvm.conf. check_initrd_warning ;; *) : ;; esac fi if [ "X${2}" = "X" ]; then # status call return return $rc fi # Report on LVM volume status to stdout... if [ $rc -eq 0 ]; then echo "Volume $1 is available (running)" else echo "Volume $1 is not available (stopped)" fi return $rc } get_activate_options() { local options="-a" case $(get_vg_mode) in 0) options="${options}ly";; 1) options="${options}y --config activation{volume_list=[\"@${OUR_TAG}\"]}";; 2) options="${options}ey";; esac if ocf_is_true "$OCF_RESKEY_partial_activation" ; then options="${options} --partial" fi # for clones (clustered volume groups), we'll also have to force # monitoring, even if disabled in lvm.conf. if ocf_is_clone; then options="$options --monitor y" fi echo $options } ## # Attempt to deactivate vg cluster wide and then start the vg exclusively ## retry_exclusive_start() { local vgchange_options=$(get_activate_options) # Deactivate each LV in the group one by one cluster wide set -- $(lvs -o name,attr --noheadings $OCF_RESKEY_volgrpname 2> /dev/null) while [ $# -ge 2 ]; do case $2 in ????ao*) # open LVs cannot be deactivated. return $OCF_ERR_GENERIC;; *) if ! lvchange -an $OCF_RESKEY_volgrpname/$1; then ocf_log err "Unable to perform required deactivation of $OCF_RESKEY_volgrpname/$1 before starting" return $OCF_ERR_GENERIC fi ;; esac shift 2 done ocf_run vgchange $vgchange_options $OCF_RESKEY_volgrpname } # # Enable LVM volume # LVM_start() { local vgchange_options=$(get_activate_options) local vg=$1 local clvmd=0 # TODO: This MUST run vgimport as well ocf_log info "Activating volume group $vg" if [ "$LVM_MAJOR" -eq "1" ]; then ocf_run vgscan $vg else ocf_run vgscan fi case $(get_vg_mode) in 2) clvmd=1 ;; 1) if ! set_tags; then return $OCF_ERR_GENERIC fi ;; *) : ;; esac if ! ocf_run vgchange $vgchange_options $vg; then if [ $clvmd -eq 0 ]; then return $OCF_ERR_GENERIC fi # Failure to exclusively activate cluster vg.: # This could be caused by a remotely active LV, Attempt # to disable volume group cluster wide and try again. # Allow for some settling sleep 5 if ! retry_exclusive_start; then return $OCF_ERR_GENERIC fi fi if LVM_status $vg; then : OK Volume $vg activated just fine! return $OCF_SUCCESS else ocf_log err "LVM: $vg did not activate correctly" return $OCF_NOT_RUNNING fi } # # Disable the LVM volume # LVM_stop() { local res=$OCF_ERR_GENERIC local vgchange_options="-aln" local vg=$1 if ! vgs $vg > /dev/null 2>&1; then ocf_log info "Volume group $vg not found" return $OCF_SUCCESS fi ocf_log info "Deactivating volume group $vg" case $(get_vg_mode) in 1) vgchange_options="-an" ;; esac for i in $(seq 10) do ocf_run vgchange $vgchange_options $vg res=$? if LVM_status $vg; then ocf_log err "LVM: $vg did not stop correctly" res=1 fi if [ $res -eq 0 ]; then break fi res=$OCF_ERR_GENERIC ocf_log warn "$vg still Active" ocf_log info "Retry deactivating volume group $vg" sleep 1 which udevadm > /dev/null 2>&1 && udevadm settle --timeout=5 done case $(get_vg_mode) in 1) if [ $res -eq 0 ]; then strip_tags res=$? fi ;; esac return $res } # # Check whether the OCF instance parameters are valid # LVM_validate_all() { check_binary $AWK + ## + # lvmetad is a daemon that caches lvm metadata to improve the + # performance of LVM commands. This daemon should never be used when + # volume groups exist that are being managed by the cluster. The lvmetad + # daemon introduces a response lag, where certain LVM commands look like + # they have completed (like vg activation) when in fact the command + # is still in progress by the lvmetad. This can cause reliability issues + # when managing volume groups in the cluster. For Example, if you have a + # volume group that is a dependency for another application, it is possible + # the cluster will think the volume group is activated and attempt to start + # the application before volume group is really accesible... lvmetad is bad. + ## + lvm dumpconfig global/use_lvmetad | grep 'use_lvmetad.*=.*1' > /dev/null 2>&1 + if [ $? -eq 0 ]; then + # for now warn users that lvmetad is enabled and that they should disable it. In the + # future we may want to consider refusing to start, or killing the lvmetad daemon. + ocf_log warn "Disable lvmetad in lvm.conf. lvmetad should never be enabled in a clustered environment. Set use_lvmetad=0 and kill the lvmetad process" + fi + ## # Off-the-shelf tests... ## VGOUT=`vgck ${VOLUME} 2>&1` if [ $? -ne 0 ]; then ocf_log err "Volume group [$VOLUME] does not exist or contains error! ${VGOUT}" exit $OCF_ERR_GENERIC fi ## # Does the Volume Group exist? ## if [ "$LVM_MAJOR" = "1" ]; then VGOUT=`vgdisplay ${VOLUME} 2>&1` else VGOUT=`vgdisplay -v ${VOLUME} 2>&1` fi if [ $? -ne 0 ]; then ocf_log err "Volume group [$VOLUME] does not exist or contains error! ${VGOUT}" exit $OCF_ERR_GENERIC fi ## # If exclusive activation is not enabled, then # further checking of proper setup is not necessary ## if ! ocf_is_true "$OCF_RESKEY_exclusive"; then return $OCF_SUCCESS; fi ## # Having cloned lvm resources with exclusive vg activation makes no sense at all. ## if ocf_is_clone; then ocf_log err "cloned lvm resources can not be activated exclusively" exit $OCF_ERR_CONFIGURED fi ## # Make sure the cluster attribute is set and clvmd is up when exclusive # activation is enabled. Otherwise we can't exclusively activate the volume group. ## case $(get_vg_mode) in 1) # exclusive activation using tags if ! verify_tags_environment; then exit $OCF_ERR_GENERIC fi ;; 2) # exclusive activation with clvmd ## # verify is clvmd running ## if ! ps -C clvmd > /dev/null 2>&1; then ocf_log err "$OCF_RESKEY_volgrpname has the cluster attribute set, but 'clvmd' is not running" exit $OCF_ERR_GENERIC fi ;; *) : ;; esac return $OCF_SUCCESS } # # 'main' starts here... # if [ $# -ne 1 ] then usage exit $OCF_ERR_ARGS fi case $1 in meta-data) meta_data exit $OCF_SUCCESS;; methods) LVM_methods exit $?;; usage) usage exit $OCF_SUCCESS;; *) ;; esac if [ -z "$OCF_RESKEY_volgrpname" ] then ocf_log err "You must identify the volume group name!" exit $OCF_ERR_CONFIGURED fi # Get the LVM version number, for this to work we assume(thanks to panjiam): # # LVM1 outputs like this # # # vgchange --version # vgchange: Logical Volume Manager 1.0.3 # Heinz Mauelshagen, Sistina Software 19/02/2002 (IOP 10) # # LVM2 and higher versions output in this format # # # vgchange --version # LVM version: 2.00.15 (2004-04-19) # Library version: 1.00.09-ioctl (2004-03-31) # Driver version: 4.1.0 LVM_VERSION=`vgchange --version 2>&1 | \ $AWK '/Logical Volume Manager/ {print $5"\n"; exit; } /LVM version:/ {printf $3"\n"; exit;}'` rc=$? if ( [ $rc -ne 0 ] || [ -z "$LVM_VERSION" ] ) then ocf_log err "LVM: $1 could not determine LVM version. Try 'vgchange --version' manually and modify $0 ?" exit $OCF_ERR_INSTALLED fi LVM_MAJOR="${LVM_VERSION%%.*}" VOLUME=$OCF_RESKEY_volgrpname OP_METHOD=$1 if [ -n "$OCF_RESKEY_tag" ]; then OUR_TAG=$OCF_RESKEY_tag fi # What kind of method was invoked? case "$1" in start) LVM_validate_all LVM_start $VOLUME exit $?;; stop) LVM_stop $VOLUME exit $?;; status) LVM_status $VOLUME $1 exit $?;; monitor) LVM_status $VOLUME exit $?;; validate-all) LVM_validate_all ;; *) usage exit $OCF_ERR_UNIMPLEMENTED;; esac