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‎SLEHA15SP4/html/SLE-HA-administration/app-ha-troubleshooting.html‎

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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head><title>Troubleshooting | Administration Guide | SLE HA 15 SP4</title><meta charset="UTF-8"/><meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes"/><link rel="stylesheet" type="text/css" href="static/css/style-new.css"/>
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<link rel="schema.dc" href="http://purl.org/dc/elements/1.1/"/><link rel="schema.dcterms" href="http://purl.org/dc/terms/"/>
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<meta name="dcterms.modified" content="2025-11-19"/><meta name="dcterms.created" content="2025-11-19"/><meta name="title" content="Troubleshooting | SLE HA 15 SP4"/>
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<meta name="dcterms.modified" content="2026-03-19"/><meta name="dcterms.created" content="2026-03-19"/><meta name="title" content="Troubleshooting | SLE HA 15 SP4"/>
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<meta name="description" content="Strange problems may occur that are not easy to understand, especially when starting to experiment with High Availability. However, there are several util…"/>
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<meta name="product-name" content="SUSE Linux Enterprise High Availability"/>
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<meta name="product-number" content="15 SP4"/>
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}
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],
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"dateModified": "2025-11-19T00:00+02:00",
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"dateModified": "2026-03-19T00:00+02:00",
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"datePublished": "2025-11-19T00:00+02:00",
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"datePublished": "2026-03-19T00:00+02:00",
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"about": [
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Certificate Authority, CA):</p><div class="procedure"><div class="procedure-contents"><ol class="procedure" type="1"><li class="step"><p>Replace <code class="filename">/etc/hawk/hawk.key</code> with the private
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key.</p></li><li class="step"><p>Replace <code class="filename">/etc/hawk/hawk.pem</code> with the
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certificate that Hawk2 should present.</p></li><li class="step"><p>
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Change ownership of the files to <code class="literal">root:haclient</code>
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and make the files accessible to the group:
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</p><div class="verbatim-wrap"><pre class="screen"><code class="prompt root"># </code><code class="command">chown root:haclient /etc/hawk/hawk.key /etc/hawk/hawk.pem</code>
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<code class="prompt root"># </code><code class="command">chmod 640 /etc/hawk/hawk.key /etc/hawk/hawk.pem</code></pre></div></li><li class="step"><p>
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Restart the Hawk2 services to reload the new certificate:
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</p><div class="verbatim-wrap"><pre class="screen"><code class="prompt root"># </code><code class="command">systemctl restart hawk-backend hawk</code></pre></div></li></ol></div></div><p>
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Change ownership of the files to <code class="literal">root:haclient</code>
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and make the files accessible to the group:</p><div class="verbatim-wrap"><pre class="screen"><code class="prompt root"># </code><code class="command">chown root:haclient /etc/hawk/hawk.key /etc/hawk/hawk.pem</code>
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<code class="prompt root"># </code><code class="command">chmod 640 /etc/hawk/hawk.key /etc/hawk/hawk.pem</code></pre></div></dd></dl></div></section><section class="sect1" id="sec-ha-troubleshooting-misc" data-id-title="Miscellaneous"><div class="titlepage"><div><div><div class="title-container"><h2 class="title"><span class="title-number-name"><span class="title-number">A7 </span><span class="title-name">Miscellaneous</span></span> <a title="Permalink" class="permalink" href="app-ha-troubleshooting.html#sec-ha-troubleshooting-misc">#</a></h2><div class="icons"><a target="_blank" class="icon-reportbug" title="Report an issue"> </a><a target="_blank" class="icon-editsource" href="https://github.com/SUSE/doc-sleha/edit/main/xml/ha_troubleshooting.xml" title="Edit source document"> </a></div></div></div></div></div><div class="variablelist"><dl class="variablelist"><dt id="id-1.4.7.3.9.2.1"><span class="term">How can I run commands on all cluster nodes?</span></dt><dd><p>
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</p><div class="verbatim-wrap"><pre class="screen"><code class="prompt root"># </code><code class="command">systemctl restart hawk-backend hawk</code></pre></div></li></ol></div></div></dd></dl></div></section><section class="sect1" id="sec-ha-troubleshooting-misc" data-id-title="Miscellaneous"><div class="titlepage"><div><div><div class="title-container"><h2 class="title"><span class="title-number-name"><span class="title-number">A7 </span><span class="title-name">Miscellaneous</span></span> <a title="Permalink" class="permalink" href="app-ha-troubleshooting.html#sec-ha-troubleshooting-misc">#</a></h2><div class="icons"><a target="_blank" class="icon-reportbug" title="Report an issue"> </a><a target="_blank" class="icon-editsource" href="https://github.com/SUSE/doc-sleha/edit/main/xml/ha_troubleshooting.xml" title="Edit source document"> </a></div></div></div></div></div><div class="variablelist"><dl class="variablelist"><dt id="id-1.4.7.3.9.2.1"><span class="term">How can I run commands on all cluster nodes?</span></dt><dd><p>
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Use the command <code class="command">crm cluster run</code> for this task. For example:
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</p><div class="verbatim-wrap"><pre class="screen"><code class="prompt root"># </code><code class="command">crm cluster run "ls -l /etc/corosync/*.conf"</code>
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INFO: [alice]

‎SLEHA15SP4/html/SLE-HA-administration/bk02ape.html‎

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‎SLEHA15SP4/html/SLE-HA-administration/book-administration.html‎

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‎SLEHA15SP4/html/SLE-HA-administration/cha-ha-agents.html‎

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outlines the different OCF return codes. It also shows the type of
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recovery the cluster will initiate when the respective error code is
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received.
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</p><div class="table" id="id-1.4.4.8.5.7" data-id-title="OCF return codes"><div class="title-container"><div class="table-title-wrap"><div class="table-title"><span class="title-number-name"><span class="title-number">Table 10.2: </span><span class="title-name">OCF return codes </span></span><a title="Permalink" class="permalink" href="cha-ha-agents.html#id-1.4.4.8.5.7">#</a></div></div><div class="icons"><a target="_blank" class="icon-reportbug" title="Report an issue"> </a><a target="_blank" class="icon-editsource" href="https://github.com/SUSE/doc-sleha/edit/main/xml/ha_error_codes.xml" title="Edit source document"> </a></div></div><div class="table-contents"><table style="border-collapse: collapse; border-top: 1px solid ; border-bottom: 1px solid ; border-left: 1px solid ; border-right: 1px solid ; "><colgroup><col class="1"/><col class="2"/><col class="3"/><col class="4"/></colgroup><thead><tr><th style="border-right: 1px solid ; border-bottom: 1px solid ; ">
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</p><p class="remark"><em><span class="remark">taroth 2010-03-07: DEVs, please check if the information in the table is still valid</span></em></p><div class="table" id="id-1.4.4.8.5.7" data-id-title="OCF return codes"><div class="title-container"><div class="table-title-wrap"><div class="table-title"><span class="title-number-name"><span class="title-number">Table 10.2: </span><span class="title-name">OCF return codes </span></span><a title="Permalink" class="permalink" href="cha-ha-agents.html#id-1.4.4.8.5.7">#</a></div></div><div class="icons"><a target="_blank" class="icon-reportbug" title="Report an issue"> </a><a target="_blank" class="icon-editsource" href="https://github.com/SUSE/doc-sleha/edit/main/xml/ha_error_codes.xml" title="Edit source document"> </a></div></div><div class="table-contents"><table style="border-collapse: collapse; border-top: 1px solid ; border-bottom: 1px solid ; border-left: 1px solid ; border-right: 1px solid ; "><colgroup><col class="1"/><col class="2"/><col class="3"/><col class="4"/></colgroup><thead><tr><th style="border-right: 1px solid ; border-bottom: 1px solid ; ">
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<p>
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OCF Return Code
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</p>

‎SLEHA15SP4/html/SLE-HA-administration/cha-ha-concepts.html‎

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</p><div class="itemizedlist"><ul class="itemizedlist"><li class="listitem"><p>
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Active/active configurations
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</p></li><li class="listitem"><p>
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<em><span class="remark">toms 2018-09-20: Explain the meaning of these abbreviations
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(from Lars):</span></em>
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Active/passive configurations: N+1, N+M, N to 1, N to M
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</p></li><li class="listitem"><p>
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Hybrid physical and virtual clusters, allowing virtual servers to be

‎SLEHA15SP4/html/SLE-HA-administration/cha-ha-config-basics.html‎

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details, see <a class="xref" href="cha-ha-monitor-clusters.html#sec-conf-hawk2-manage-monitor-status" title="11.1.1. Monitoring a single cluster">Section 11.1.1, “Monitoring a single cluster”</a>. If
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your cluster includes <code class="literal">guest nodes</code> (nodes that run
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the <code class="literal">pacemaker_remote</code> daemon), they are displayed, too.
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<em><span class="remark">taroth 2018-10-30: check and probably mention in more detail in
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'sec.conf.hawk2.manage.monitor.status' for next revision</span></em>
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The screen refreshes in near real-time: any status changes for nodes
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or resources are visible almost immediately.
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</p></li><li class="listitem"><p>
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<a class="xref" href="cha-ha-monitor-clusters.html#sec-conf-hawk2-manage-monitor-dash" title="11.1.2. Monitoring multiple clusters">Section 11.1.2, “Monitoring multiple clusters”</a>. If your cluster
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includes <code class="literal">guest nodes</code> (nodes that run
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the <code class="literal">pacemaker_remote</code> daemon), they are displayed, too.
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The screen
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<em><span class="remark">taroth 2018-10-30: check and probably mention in more detail in
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'sec.conf.hawk2.manage.monitor.status' for next revision</span></em>The screen
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refreshes in near real-time: any status changes for nodes or resources
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are visible almost immediately.
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</p></li></ul></div></dd><dt id="id-1.4.4.3.6.7.4.2.2"><span class="term"><span class="guimenu">Troubleshooting</span>
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</p><p>
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To display a short description of the parameter on the right-hand side of
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the screen, hover your mouse over a parameter.
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<em><span class="remark">taroth 2017-08-10: this does no longer seem to be the case
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@ayoub: are those descriptions gone on purpose?</span></em>
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</p><div class="figure" id="id-1.4.4.3.6.8.4.3.4"><div class="figure-contents"><div class="mediaobject"><a href="images/hawk2-cluster-config.png"><img src="images/hawk2-cluster-config.png" width="100%" alt="Hawk2—cluster configuration" title="Hawk2—cluster configuration"/></a></div></div><div class="title-container"><div class="figure-title-wrap"><div class="figure-title"><span class="title-number-name"><span class="title-number">Figure 5.1: </span><span class="title-name">Hawk2—cluster configuration </span></span><a title="Permalink" class="permalink" href="cha-ha-config-basics.html#id-1.4.4.3.6.8.4.3.4">#</a></div></div><div class="icons"><a target="_blank" class="icon-reportbug" title="Report an issue"> </a><a target="_blank" class="icon-editsource" href="https://github.com/SUSE/doc-sleha/edit/main/xml/ha_config_hawk2.xml" title="Edit source document"> </a></div></div></div></li><li class="step"><p>
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Check the values for <span class="guimenu">no-quorum-policy</span> and
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<span class="guimenu">stonith-enabled</span> and adjust them, if necessary:
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recommended to indent lines that belong to a certain subcommand to improve
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readability.
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</p><p>To use this script, use one of the following methods:</p><div class="verbatim-wrap"><pre class="screen"><code class="prompt root"># </code><code class="command">crm -f example.cli</code>
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<code class="prompt root"># </code><code class="command">crm &lt; example.cli</code></pre></div></section><section class="sect2" id="sec-ha-manual-config-clusterscripts" data-id-title="Using crmshs cluster scripts"><div class="titlepage"><div><div><div class="title-container"><h3 class="title"><span class="title-number-name"><span class="title-number">5.5.5 </span><span class="title-name">Using <code class="systemitem">crmsh</code>'s cluster scripts</span></span> <a title="Permalink" class="permalink" href="cha-ha-config-basics.html#sec-ha-manual-config-clusterscripts">#</a></h3><div class="icons"><a target="_blank" class="icon-reportbug" title="Report an issue"> </a><a target="_blank" class="icon-editsource" href="https://github.com/SUSE/doc-sleha/edit/main/xml/ha_config_cli.xml" title="Edit source document"> </a></div></div></div></div></div><p>Collecting information from all cluster nodes and deploying any
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<code class="prompt root"># </code><code class="command">crm &lt; example.cli</code></pre></div></section><section class="sect2" id="sec-ha-manual-config-clusterscripts" data-id-title="Using crmshs cluster scripts"><div class="titlepage"><div><div><div class="title-container"><h3 class="title"><span class="title-number-name"><span class="title-number">5.5.5 </span><span class="title-name">Using <code class="systemitem">crmsh</code>'s cluster scripts</span></span> <a title="Permalink" class="permalink" href="cha-ha-config-basics.html#sec-ha-manual-config-clusterscripts">#</a></h3><div class="icons"><a target="_blank" class="icon-reportbug" title="Report an issue"> </a><a target="_blank" class="icon-editsource" href="https://github.com/SUSE/doc-sleha/edit/main/xml/ha_config_cli.xml" title="Edit source document"> </a></div></div></div></div></div><p class="remark"><em><span class="remark">toms 2015-10-14: FATE#318211</span></em></p><p>Collecting information from all cluster nodes and deploying any
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changes is a key cluster administration task. Instead of performing
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the same procedures manually on different nodes (which is error-prone),
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you can use the <code class="systemitem">crmsh</code> cluster scripts.
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with <code class="command">crm status</code>:</p><div class="verbatim-wrap"><pre class="screen"><code class="prompt root"># </code><code class="command">crm status</code>
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[...]
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Clone Set: c-sysadmin [sysadmin]
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Started: [ alice bob ]</pre></div></section></section><section class="sect2" id="sec-ha-manual-config-template" data-id-title="Using configuration templates"><div class="titlepage"><div><div><div class="title-container"><h3 class="title"><span class="title-number-name"><span class="title-number">5.5.6 </span><span class="title-name">Using configuration templates</span></span> <a title="Permalink" class="permalink" href="cha-ha-config-basics.html#sec-ha-manual-config-template">#</a></h3><div class="icons"><a target="_blank" class="icon-reportbug" title="Report an issue"> </a><a target="_blank" class="icon-editsource" href="https://github.com/SUSE/doc-sleha/edit/main/xml/ha_config_cli.xml" title="Edit source document"> </a></div></div></div></div></div><div id="id-1.4.4.3.7.13.3" data-id-title="Deprecation notice" class="admonition note normal"><img class="symbol" alt="Note" title="Note" src="static/images/icon-note.svg"/><div class="admon-title">Note: Deprecation notice</div><p>The use of configuration templates is deprecated and will
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Started: [ alice bob ]</pre></div></section></section><section class="sect2" id="sec-ha-manual-config-template" data-id-title="Using configuration templates"><div class="titlepage"><div><div><div class="title-container"><h3 class="title"><span class="title-number-name"><span class="title-number">5.5.6 </span><span class="title-name">Using configuration templates</span></span> <a title="Permalink" class="permalink" href="cha-ha-config-basics.html#sec-ha-manual-config-template">#</a></h3><div class="icons"><a target="_blank" class="icon-reportbug" title="Report an issue"> </a><a target="_blank" class="icon-editsource" href="https://github.com/SUSE/doc-sleha/edit/main/xml/ha_config_cli.xml" title="Edit source document"> </a></div></div></div></div></div><p class="remark"><em><span class="remark">toms 2015-10-14: will be replaced by the crm cluster scripts</span></em></p><div id="id-1.4.4.3.7.13.3" data-id-title="Deprecation notice" class="admonition note normal"><img class="symbol" alt="Note" title="Note" src="static/images/icon-note.svg"/><div class="admon-title">Note: Deprecation notice</div><p>The use of configuration templates is deprecated and will
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be removed in the future. Configuration templates will be replaced
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by cluster scripts, see <a class="xref" href="cha-ha-config-basics.html#sec-ha-manual-config-clusterscripts" title="5.5.5. Using crmsh's cluster scripts">Section 5.5.5, “Using <code class="systemitem">crmsh</code>'s cluster scripts”</a>.
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</p></div><p>

‎SLEHA15SP4/html/SLE-HA-administration/cha-ha-drbd.html‎

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</p><p>
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The following procedures assume that the cluster nodes use the TCP port <code class="literal">7788</code>.
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Make sure this port is open in your firewall.
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</p></div><p>
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</p></div><p class="remark"><em><span class="remark">toms 2014-02-13: phil: perhaps the example should be changed to
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use an LV instead;band eg. "nfs" instead of "r0".</span></em></p><p>
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To set up DRBD, perform the following procedures:
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</p><div class="orderedlist"><ol class="orderedlist" type="1"><li class="listitem"><p>
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<a class="xref" href="cha-ha-drbd.html#sec-ha-drbd-prepare" title="23.3.1. Preparing your system to use DRBD">Section 23.3.1, “Preparing your system to use DRBD”</a>
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Configuration</span> › <span class="guimenu">Booting</span> as it is
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(by default it is <code class="literal">off</code>); do not change that as
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Pacemaker manages this service.
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</p></li><li class="step"><p>If you have a firewall running, enable <span class="guimenu">Open Port in
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</p></li><li class="step"><em><span class="remark">toms 2015-09-29: FATE#318391</span></em><p>If you have a firewall running, enable <span class="guimenu">Open Port in
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Firewall</span>.</p></li><li class="step"><p>Go to the <span class="guimenu">Resource Configuration</span> entry.
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Select <span class="guimenu">Add</span> to create a new resource (see
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<a class="xref" href="cha-ha-drbd.html#fig-ha-drbd-yast-resconfig" title="Resource configuration">Figure 23.2, “Resource configuration”</a>).
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and finish with <span class="guimenu">Save</span>.
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</p></li><li class="step"><p>Close the resource configuration with <span class="guimenu">Ok</span>
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and <span class="guimenu">Finish</span>.
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</p></li><li class="step"><p>If you use LVM with DRBD, it is necessary to change some options
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</p></li><li class="step"><em><span class="remark">toms 2015-09-30: FATE#317957</span></em><p>If you use LVM with DRBD, it is necessary to change some options
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in the LVM configuration file (see the <span class="guimenu">LVM
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Configuration</span> entry). This change can be done by the
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YaST DRBD module automatically.

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