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<h2>FAQ</h2>
<p class="question">Q: Where can I get Pacemaker?</p>
<p class="answer">A: Pacemaker ships as part of most modern
distributions, so you can usually just launch your
favorite package manager on:
<ul>
<li>openSUSE and SUSE Linux Enterprise Server (SLES)</li>
<li>Fedora and derivatives such as Red Hat Enterprise Linux (RHEL)
and CentOS</li>
<li>Debian and derivatives such as Ubuntu (with the exception of
Debian 8 "jessie", for which see the <a
href="https://wiki.debian.org/Debian-HA">Debian-HA team</a> for
or <a href="http://www.clusterlabs.org/doc/en-US/Pacemaker/1.1-crmsh/html/Pacemaker_Explained/_upstart.html">Upstart</a>.
</p>
<p class="question">Q: Can I use Pacemaker with Heartbeat?</p>
<p class="answer">A: Yes. Pacemaker started off life as part
of the <a href="http://linux-ha.org">Heartbeat</a> project and continues to support it as an
alternative to Corosync. See
this <a href="http://www.linux-ha.org/wiki/Configuration">documentation</a> for more details</p>
<p class="question">Q: Can I use Pacemaker with CMAN?</p>
<p class="answer">A: Yes. Pacemaker added support
for <a href="https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Linux/6/html/High_Availability_Add-On_Overview/ch-cman.html">CMAN
v3</a> in version 1.1.5 to better integrate with distros
that have traditionally shipped and/or supported the RHCS
cluster stack instead of Pacemaker. This is particularly
relevant for those looking to use GFS2 or OCFS2. See
the <a href="http://www.clusterlabs.org/doc/en-US/Pacemaker/1.1-plugin/html/Clusters_from_Scratch/ch08s02.html">documentation</a>
for more details</p>
<p class="question">Q: Can I use Pacemaker with Corosync 1.x?</p>
<p class="answer">A: Yes. You will need to configure
<a href="http://corosync.org">Corosync</a> to load Pacemaker's custom plugin to provide the
membership and quorum information we require. See
the <a href="http://www.clusterlabs.org/doc/en-US/Pacemaker/1.1-plugin/html/Clusters_from_Scratch/s-configure-corosync.html">documentation</a> for more details.</p>
<p class="question">Q: Can I use Pacemaker with Corosync 2.x?</p>
<p class="answer">A: Yes. Pacemaker can obtain the
membership and quorum information it requires directly from
<a href="http://corosync.org">Corosync</a> in this configuration. See
the <a href="http://www.clusterlabs.org/doc/en-US/Pacemaker/1.1-pcs/html/Clusters_from_Scratch/_cluster_software_installation.html">documentation</a> for more details.</p>
<p class="question">Q: Do I need a fencing device?</p>
<p class="answer">A: Yes. Fencing is the only 100% reliable
way to ensure the integrity of your data and that
applications are only active on one host. Although
Pacemaker is technically able to function without Fencing,
there are a good reasons SUSE and Red Hat will not support
such a configuration.
</p>
<p class="question">Q: Do I need to know XML to configure Pacemaker?</p>
<p class="answer">A: No. Although Pacemaker uses XML as its
native configuration format, there
exist <a href="/#addons">2 CLIs and at least 4 GUIs</a>
that present the configuration in a human friendly format.
</p>
<p class="question">Q: How do I synchronize the cluster configuration?</p>
<p class="answer">A: Any changes to Pacemaker's
configuration are automatically replicated to other
machines. The configuration is also versioned, so any
offline machines will be updated when they return.
</p>
<p class="question">Q: Should I choose pcs or crmsh?</p>
<p class="answer">A: Arguably the best advice is to use
whichever one comes with your distro. This is the one
that will be tailored to that environment, receive regular
bugfixes and feature in the documentation.
</p>
<p class="answer">
Of course, for years people have been side-loading all of
Pacemaker onto enterprise distros that didn't ship it, so
doing the same for just a configuration tool should be
easy if your favorite distro does not ship your favorite
tool.
</p>
<p class="question">Q: What if my question isn't here?</p>
<p class="answer">A: See the <a href="help.html">getting help</a> section and let us know!</p>