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‎SLEHA15SP5/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 SP5</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 SP5"/>
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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 SP5"/>
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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 SP5"/>
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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]

‎SLEHA15SP5/html/SLE-HA-administration/bk02ape.html‎

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‎SLEHA15SP5/html/SLE-HA-administration/book-administration.html‎

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‎SLEHA15SP5/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>

‎SLEHA15SP5/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

‎SLEHA15SP5/html/SLE-HA-administration/cha-ha-config-basics.html‎

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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:

‎SLEHA15SP5/html/SLE-HA-administration/cha-ha-lb.html‎

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</p><p>
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High availability is provided by detecting node or service failures and
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reconfiguring the whole virtual server system appropriately, as usual.
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</p><p>
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</p><p class="remark"><em><span class="remark">Most of the following items are taken from FATE#316459. Not
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sure if this is really correct. Needs technical proofreading by an
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expert.</span></em></p><p>
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There are several load balancing strategies. Here are some Layer 4
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strategies, suitable for Linux Virtual Server:
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</p><div class="itemizedlist"><ul class="itemizedlist"><li class="listitem"><p><span class="formalpara-title">Round robin. </span>
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servers that you want to use as backup for the load balancer. You can
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synchronize the configuration file with Csync2 as described in
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<a class="xref" href="cha-ha-ycluster.html#sec-ha-installation-setup-csync2" title="4.7. Transferring the configuration to all nodes">Section 4.7, “Transferring the configuration to all nodes”</a>.
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</p></li></ul></div></section></section><section class="sect1" id="sec-ha-lb-haproxy" data-id-title="Configuring load balancing with HAProxy"><div class="titlepage"><div><div><div class="title-container"><h2 class="title"><span class="title-number-name"><span class="title-number">17.3 </span><span class="title-name">Configuring load balancing with HAProxy</span></span> <a title="Permalink" class="permalink" href="cha-ha-lb.html#sec-ha-lb-haproxy">#</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_lb_haproxy.xml" title="Edit source document"> </a></div></div></div></div></div><p>
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</p></li></ul></div></section></section><section class="sect1" id="sec-ha-lb-haproxy" data-id-title="Configuring load balancing with HAProxy"><div class="titlepage"><div><div><div class="title-container"><h2 class="title"><span class="title-number-name"><span class="title-number">17.3 </span><span class="title-name">Configuring load balancing with HAProxy</span></span> <a title="Permalink" class="permalink" href="cha-ha-lb.html#sec-ha-lb-haproxy">#</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_lb_haproxy.xml" title="Edit source document"> </a></div></div></div></div></div><p class="remark"><em><span class="remark">
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This is a straightforward explanation how to set up a HA openSUSE
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13.1 http load balancer, but not using SLE HA tools, but plain
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vanilla openSUSE with vi.
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</span></em></p><p>
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The following section gives an overview of the HAProxy and how to
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set up on High Availability. The load balancer distributes all requests to its
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back-end servers. It is configured as active/passive, meaning if one
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</p></li><li class="step"><p>
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Create the file <code class="filename">/etc/haproxy/haproxy.cfg</code> with the
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following contents:
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</p><div class="verbatim-wrap"><pre class="screen">global <span class="callout" id="co-ha-lb-global">1</span>
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</p><em><span class="remark">toms 2014-09-17: Not sure about all the options.</span></em><div class="verbatim-wrap"><pre class="screen">global <span class="callout" id="co-ha-lb-global">1</span>
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maxconn 256
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daemon
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‎SLEHA15SP5/html/SLE-HA-administration/cha-ha-ocfs2.html‎

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resource. If you use the wizard, you still need to create an SBD
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partition on the shared storage and configure a STONITH resource as
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described in <a class="xref" href="cha-ha-ocfs2.html#pro-ocfs2-stonith" title="Configuring a STONITH resource">Procedure 21.1, “Configuring a STONITH resource”</a>.
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</p><p>
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</p><p class="remark"><em><span class="remark">taroth 2014-08-15: todo for next release: unify manual configuration
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and configuration via Hawk (use same resources, same options
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etc.), filed https://bugzilla.novell.com/show_bug.cgi?id=892116 for this</span></em></p><p>
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Using the OCFS2 template in the Hawk2 <span class="guimenu">Setup
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Wizard</span> also leads to a slightly different resource
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configuration than the manual configuration described in

‎SLEHA15SP5/html/SLE-HA-administration/cha-ha-rear.html‎

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with their original file size. Therefore, it is impossible to
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restore the snapshots as they have been before on the original
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system.
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</p></dd><dt id="id-1.4.5.10.3.8.3.3"><span class="term">Your SLE system needs matching ReaR configuration</span></dt><dd><p>
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</p></dd><dt id="id-1.4.5.10.3.8.3.3"><span class="term">Your SLE system needs matching ReaR configuration</span></dt><dd><p class="remark"><em><span class="remark">toms 2018-04-18: See https://github.com/rear/rear/issues/1368#issuecomment-302410707</span></em></p><p>
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For example, the setups in SLE12 GA, SLE12 SP1, and SLE12 SP2 have several
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incompatible Btrfs default structures. As such, it is
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crucial to use a matching ReaR configuration file. See the example
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files <code class="filename">/usr/share/rear/conf/examples/SLE12*-btrfs-example.conf</code>.
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<em><span class="remark">toms 2018-04-18: https://github.com/rear/rear/issues/1368#issuecomment-302410707</span></em>
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</p></dd></dl></div></section><section class="sect2" id="sec-ha-rear-concept-scenarios" data-id-title="Scenarios and backup tools"><div class="titlepage"><div><div><div class="title-container"><h3 class="title"><span class="title-number-name"><span class="title-number">27.1.7 </span><span class="title-name">Scenarios and backup tools</span></span> <a title="Permalink" class="permalink" href="cha-ha-rear.html#sec-ha-rear-concept-scenarios">#</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_rear.xml" title="Edit source document"> </a></div></div></div></div></div><p>
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ReaR can create a disaster recovery system (including a system-specific
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recovery installer) that can be booted from a local medium (like a hard

‎SLEHA15SP5/html/SLE-HA-administration/cha-ha-samba.html‎

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ip:1 (ocf:heartbeat:IPaddr2): Started factory-1</pre></div></li><li class="step"><p>
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Test from a client machine. On a Linux client, run the following
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command to see if you can copy files from and to the system:
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</p><div class="verbatim-wrap"><pre class="screen"><code class="prompt root"># </code><code class="command">smbclient //192.168.2.222/myshare</code></pre></div></li></ol></div></div></section><section class="sect1" id="sec-ha-samba-ad" data-id-title="Joining an Active Directory domain"><div class="titlepage"><div><div><div class="title-container"><h2 class="title"><span class="title-number-name"><span class="title-number">26.3 </span><span class="title-name">Joining an Active Directory domain</span></span> <a title="Permalink" class="permalink" href="cha-ha-samba.html#sec-ha-samba-ad">#</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_samba.xml" title="Edit source document"> </a></div></div></div></div></div><p>
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</p><div class="verbatim-wrap"><pre class="screen"><code class="prompt root"># </code><code class="command">smbclient //192.168.2.222/myshare</code></pre></div></li></ol></div></div></section><section class="sect1" id="sec-ha-samba-ad" data-id-title="Joining an Active Directory domain"><div class="titlepage"><div><div><div class="title-container"><h2 class="title"><span class="title-number-name"><span class="title-number">26.3 </span><span class="title-name">Joining an Active Directory domain</span></span> <a title="Permalink" class="permalink" href="cha-ha-samba.html#sec-ha-samba-ad">#</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_samba.xml" title="Edit source document"> </a></div></div></div></div></div><p class="remark"><em><span class="remark">toms 2013-04-02: Needs changes</span></em></p><p>
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Active Directory (AD) is a directory service for Windows server systems.
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</p><p>
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The following instructions outline how to join a CTDB cluster to an

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