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<article class="markdown-body">
<header>
<h1 class="title">Ansible Role: Kernel Crash Dump</h1>
</header>
<hr>
<nav id="TOC">
<h1 class="toc-title">Contents</h1>
<ul>
<li><a href="#warning" id="toc-warning">Warning</a></li>
<li><a href="#requirements" id="toc-requirements">Requirements</a>
<ul>
<li><a href="#collection-requirements"
id="toc-collection-requirements">Collection requirements</a></li>
</ul></li>
<li><a href="#role-variables" id="toc-role-variables">Role
Variables</a></li>
<li><a href="#ansible-facts-returned-by-the-role"
id="toc-ansible-facts-returned-by-the-role">Ansible Facts Returned by
the Role</a></li>
<li><a href="#rpm-ostree" id="toc-rpm-ostree">rpm-ostree</a></li>
<li><a href="#license" id="toc-license">License</a></li>
</ul>
</nav>
<hr>
<p>An ansible role which configures kdump.</p>
<h1 id="warning">Warning</h1>
<p>The role replaces the kdump configuration of the managed host.
Previous settings will be lost, even if they are not specified in the
role variables. Currently, this includes replacing at least the
following configuration file:</p>
<ul>
<li><code>/etc/kdump.conf</code></li>
</ul>
<h1 id="requirements">Requirements</h1>
<p>See below</p>
<h2 id="collection-requirements">Collection requirements</h2>
<p>The role requires external collections only for management of
<code>rpm-ostree</code> nodes. Please run the following command to
install them if you need to manage <code>rpm-ostree</code> nodes:</p>
<div class="sourceCode" id="cb1"><pre
class="sourceCode bash"><code class="sourceCode bash"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="ex">ansible-galaxy</span> collection install <span class="at">-vv</span> <span class="at">-r</span> meta/collection-requirements.yml</span></code></pre></div>
<h1 id="role-variables">Role Variables</h1>
<p><strong>kdump_target</strong>: Can be specified to write vmcore to a
location that is not in the root file system. If <code>type</code> is
<code>raw</code> or a filesystem type, location points to a partition
(by device node name, label, or uuid). For example:</p>
<div class="sourceCode" id="cb2"><pre
class="sourceCode yaml"><code class="sourceCode yaml"><span id="cb2-1"><a href="#cb2-1" aria-hidden="true" tabindex="-1"></a><span class="fu">kdump_target</span><span class="kw">:</span></span>
<span id="cb2-2"><a href="#cb2-2" aria-hidden="true" tabindex="-1"></a><span class="at"> </span><span class="fu">type</span><span class="kw">:</span><span class="at"> raw</span></span>
<span id="cb2-3"><a href="#cb2-3" aria-hidden="true" tabindex="-1"></a><span class="at"> </span><span class="fu">location</span><span class="kw">:</span><span class="at"> /dev/sda1</span></span></code></pre></div>
<p>or for an <code>ext4</code> filesystem:</p>
<div class="sourceCode" id="cb3"><pre
class="sourceCode yaml"><code class="sourceCode yaml"><span id="cb3-1"><a href="#cb3-1" aria-hidden="true" tabindex="-1"></a><span class="fu">kdump_target</span><span class="kw">:</span></span>
<span id="cb3-2"><a href="#cb3-2" aria-hidden="true" tabindex="-1"></a><span class="at"> </span><span class="fu">type</span><span class="kw">:</span><span class="at"> ext4</span></span>
<span id="cb3-3"><a href="#cb3-3" aria-hidden="true" tabindex="-1"></a><span class="at"> </span><span class="fu">location</span><span class="kw">:</span><span class="at"> </span><span class="st">"12e3e25f-534e-4007-a40c-e7e080a933ad"</span></span></code></pre></div>
<p>If <code>type</code> is <code>ssh</code>, location points to a
server: example:</p>
<div class="sourceCode" id="cb4"><pre
class="sourceCode yaml"><code class="sourceCode yaml"><span id="cb4-1"><a href="#cb4-1" aria-hidden="true" tabindex="-1"></a><span class="at"> </span><span class="fu">type</span><span class="kw">:</span><span class="at"> ssh</span></span>
<span id="cb4-2"><a href="#cb4-2" aria-hidden="true" tabindex="-1"></a><span class="at"> </span><span class="fu">location</span><span class="kw">:</span><span class="at"> [email protected]</span></span></code></pre></div>
<p>Similarly for <code>nfs</code>, <code>location</code> points to an
nfs server:</p>
<div class="sourceCode" id="cb5"><pre
class="sourceCode yaml"><code class="sourceCode yaml"><span id="cb5-1"><a href="#cb5-1" aria-hidden="true" tabindex="-1"></a><span class="at"> </span><span class="fu">type</span><span class="kw">:</span><span class="at"> nfs</span></span>
<span id="cb5-2"><a href="#cb5-2" aria-hidden="true" tabindex="-1"></a><span class="at"> </span><span class="fu">location</span><span class="kw">:</span><span class="at"> nfs.example.com</span></span></code></pre></div>
<p>Only the <code>ssh</code> type is considered stable, support for the
other types is experimental.</p>
<p><strong>kdump_path</strong>: The path to which vmcore will be
written. If <code>kdump_target</code> is not null, path is relative to
that dump target. Otherwise, it must be an absolute path in the root
file system.</p>
<p><strong>kdump_core_collector</strong>: A command to copy the vmcore.
If null, uses <code>makedumpfile</code> with options depending on the
<code>kdump_target.type</code>.</p>
<p><strong>kdump_system_action</strong>: The action that is performed
when dumping the core file fails. Can be <code>reboot</code>,
<code>halt</code>, <code>poweroff</code>, or <code>shell</code>.</p>
<p><strong>kdump_auto_reset_crashkernel</strong>: Whether to reset
kernel crashkernel to new default value or not when kexec-tools updates
the default crashkernel value and existing kernels using the old default
kernel crashkernel value.</p>
<p><strong>kdump_dracut_args</strong>: Pass extra dracut options when
rebuilding kdump initrd.</p>
<p><strong>kdump_reboot_ok</strong>: If you run the role on a managed
node that does not have memory reserved for crash kernel, i.e. the file
<code>/sys/kernel/kexec_crash_size</code> contains <code>0</code>, it
might be required to reboot the managed node to configure kdump.</p>
<p>By default, the role does not reboot the managed node. If a managed
node requires reboot, the role sets the
<code>kdump_reboot_required</code> fact and fails, so that the user can
reboot the managed node when needed. If you want the role to reboot the
system if required, set this variable to <code>true</code>. You do not
need to re-execute the role after boot.</p>
<p>Default: <code>false</code></p>
<h1 id="ansible-facts-returned-by-the-role">Ansible Facts Returned by
the Role</h1>
<p><strong>kdump_reboot_required</strong>: The role sets this fact if
the managed node requires reboot to complete kdump configuration.
Re-execute the role after boot to ensure that kdump is working.</p>
<h1 id="rpm-ostree">rpm-ostree</h1>
<p>See README-ostree.md</p>
<h1 id="license">License</h1>
<p>MIT</p>
</article>
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