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---
layout: pacemaker
title: Pacemaker Manual Pages
---
<section id="main">
<h1>Pacemaker Command Line Tools</h1>
<h2>Tool Summary</h2>
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<h2>The Right Tool for the Job</h2>
<p>
Pacemaker ships with a set of command-line tools to assist you
in managing your cluster. Their manual pages are all linked
above. Here are more details about the most important tools:
</p>
<div class="variablelist">
<dl>
<dt>
<span class="term">Monitoring Cluster Status</span>
</dt>
<dd>
<p>The <strong class="inline-command">crm_mon</strong> command
allows you to monitor your cluster's status and
configuration. Its output includes the number of nodes,
uname, uuid, status, the resources configured in your
cluster, and the current status of each. The output of
<strong class="inline-command">crm_mon</strong>
can be displayed at the console or printed into an XML or HTML
file. When provided with a cluster configuration file
without the status section,
<strong class="inline-command">crm_mon</strong>
creates an overview of nodes and resources as specified
in the file. See <a href="crm_mon.8.html"
title="crm_mon"><span class="refentrytitle">crm_mon</span>(8)</a>
for a detailed introduction to this tool's usage and
command syntax.
</p>
</dd>
<dt>
<span class="term">Managing the Cluster Configuration</span>
</dt>
<dd>
<p>The <strong class="inline-command">cibadmin</strong> command is
the low-level administrative command for manipulating
the Pacemaker CIB. It can be used to dump all or part of
the CIB, update all or part of it, modify all or part of
it, delete the entire CIB, or perform miscellaneous CIB
administrative operations. See <a href="cibadmin.8.html"
title="cibadmin">
<span class="refentrytitle">cibadmin(8)</a> for a
detailed introduction
to this tool's usage and command syntax.
</p>
<p>The <strong class="inline-command">crm_diff</strong> command
assists you in creating and applying XML patches. This
can be useful for visualizing the changes between two
versions of the cluster configuration or saving changes
so they can be applied at a later time
using <a href="cibadmin.8.html" title="cibadmin">
<span class="refentrytitle">cibadmin</span>(8)</a>.
See <a href="crm_diff.8.html" title="crm_diff">
<span class="refentrytitle">crm_diff</span>(8)</a> for a
detailed introduction to this tool's usage and command
syntax.
</p>
<p>The <strong class="inline-command">crm_verify</strong> command
checks the configuration database (CIB) for consistency
and other problems. It can check a file containing the
configuration or connect to a running cluster. It
reports two classes of problems. Errors must be fixed
before Pacemaker can work properly while warning
resolution is up to the administrator.
<strong class="inline-command">crm_verify</strong> assists in
creating new or modified configurations. You can take a
local copy of a CIB in the running cluster, edit it,
validate it
using <strong class="inline-command">crm_verify</strong> , then
put the new configuration into effect using
<strong class="inline-command">cibadmin</strong>
. See <a href="crm_verify.8.html" title="crm_verify">
<span class="refentrytitle">crm_verify</span>(8)</a>
for a detailed introduction to this tool's usage and
command syntax.
</p>
</dd>
<dt>
<span class="term">Manipulating Attributes</span>
</dt>
<dd>
<p>The <strong class="inline-command">crm_attribute</strong>
command lets you query and manipulate node attributes
and cluster configuration options that are used in the
CIB. See <a href="crm_attribute.8.html"
title="crm_attribute"> <span class="refentrytitle">crm_attribute</span>(8)</a>
for a detailed introduction to this tool's usage and
command syntax.</p>
</dd>
<dt>
<span class="term">Managing Resources</span>
</dt>
<dd>
<p>The <strong class="inline-command">crm_resource</strong>
command performs various resource-related actions on the
cluster. It lets you modify the definition of configured
resources, start and stop resources, or delete and
migrate resources between
nodes. See <a href="crm_resource.8.html"
title="crm_resource">
<span class="refentrytitle">crm_resource</span>(8)</a>
for a detailed introduction to this tool's usage and
command syntax.</p>
</dd>
<dt>
<span class="term">Managing Resource Fail Counts</span>
</dt>
<dd>
<p>The <strong class="inline-command">crm_failcount</strong>
command queries the number of failures per resource on a
given node. This tool can also be used to reset the
failcount, allowing the resource to again run on nodes
where it had failed too often.
See <a href="crm_failcount.8.html"
title="crm_failcount">
<span class="refentrytitle">crm_failcount</span>(8)</a>
for a detailed introduction to this tool's usage and
command syntax.</p>
</dd>
<dt>
<span class="term">Managing Nodes</span>
</dt>
<dd>
<p>The <strong class="inline-command">crm_standby</strong> command
can manipulate a node's standby attribute. Any node in
standby mode is no longer eligible to host resources and
any resources that are there must be moved. Standby mode
can be useful for performing maintenance tasks, such as
kernel updates. Remove the standby attribute from the
node as it should become a fully active member of the
cluster again. See <a href="crm_standby.8.html"
title="crm_standby">
<span class="refentrytitle">crm_standby</span>(8)</a>
for a detailed introduction to this tool's usage and
command syntax.
</p>
</dd>
</dl>
</div>
</section>

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