Michael Stapelberg
281 lines
21 KiB
HTML
281 lines
21 KiB
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Client side (gokrazy) To enable remote syslog, you need to configure a target. gokrazy checks the following sources in order, using the first value found:">
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Client side (gokrazy) To enable remote syslog, you need to configure a target. gokrazy checks the following sources in order, using the first value found:">
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Client side (gokrazy) To enable remote syslog, you need to configure a target. gokrazy checks the following sources in order, using the first value found:">
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Client side (gokrazy) To enable remote syslog, you need to configure a target. gokrazy checks the following sources in order, using the first value found:">
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<li><a href="#option-1-linux-kernel-command-line">Option 1: Linux kernel command line</a></li>
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<li><a href="#option-2-permanent-data-partition-perm">Option 2: permanent data partition (<code>/perm</code>)</a></li>
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<h1 id="remote-syslog-sending-gokrazy-logs-over-the-network">Remote Syslog: sending gokrazy logs over the network</h1>
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<p>If you update your gokrazy installations daily, as we recommend you do, logs
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will be cleared daily as a side effect of rebooting the device. You can use
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<a href="https://en.wikipedia.org/wiki/Syslog#Network_protocol" rel="external">Remote Syslog</a> to
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persist logs elsewhere for later analysis.</p>
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<h2 id="client-side-gokrazy">Client side (gokrazy)<span class="btn cstyle anchor copyanchor scrollanchor link noborder notitle interactive"><button type="button" title="Copy link to clipboard"><i class="fa-fw fas fa-link fa-lg"></i></button></span></h2>
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<p>To enable remote syslog, you need to configure a target. gokrazy checks the
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following sources in order, using the first value found:</p>
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<h3 id="option-1-linux-kernel-command-line">Option 1: Linux kernel command line<span class="btn cstyle anchor copyanchor scrollanchor link noborder notitle interactive"><button type="button" title="Copy link to clipboard"><i class="fa-fw fas fa-link fa-lg"></i></button></span></h3>
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<p>Specify the target via the <code>gokrazy.remote_syslog.target</code> kernel command line
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parameter. This is primarily intended for integration tests where Linux is being
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booted from a qemu microvm.</p>
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<h3 id="option-2-permanent-data-partition-perm">Option 2: permanent data partition (<code>/perm</code>)<span class="btn cstyle anchor copyanchor scrollanchor link noborder notitle interactive"><button type="button" title="Copy link to clipboard"><i class="fa-fw fas fa-link fa-lg"></i></button></span></h3>
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<p>Create the file <code>remote_syslog/target</code> on the permanent data partition. This
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allows changing the target at runtime without rebuilding the image.</p>
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<div class="highlight actionbar-wrapper wrap-code" dir="auto"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code class="language-shell" data-lang="shell"><span style="display:flex;"><span><span style="color:#75715e"># The following assumes you already created a file system</span>
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</span></span><span style="display:flex;"><span><span style="color:#75715e"># on the permanent data partition. Otherwise, please use:</span>
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</span></span><span style="display:flex;"><span><span style="color:#75715e"># sudo mkfs.ext4 /dev/disk/by-partuuid/2e18c40c-04</span>
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</span></span><span style="display:flex;"><span>
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</span></span><span style="display:flex;"><span>sudo mount /dev/disk/by-partuuid/2e18c40c-04 /mnt
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</span></span><span style="display:flex;"><span>echo 10.0.0.76:514 | sudo tee /mnt/remote_syslog/target
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</span></span><span style="display:flex;"><span>sudo umount /mnt</span></span></code></pre></div>
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<h3 id="option-3-gokrazy-config-etcgokrazy">Option 3: gokrazy config (<code>/etc/gokrazy</code>)<span class="btn cstyle anchor copyanchor scrollanchor link noborder notitle interactive"><button type="button" title="Copy link to clipboard"><i class="fa-fw fas fa-link fa-lg"></i></button></span></h3>
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<p>Include the file <code>remote_syslog/target</code> in the <code>/etc/gokrazy</code> directory of your
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gokrazy image. This bakes the configuration into the image at build time.</p>
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<p>I recommend using a (static) IP address for increased reliability, so that
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remote syslog works even when DNS does not.</p>
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<h2 id="server-side-syslog-ng">Server side (syslog-ng)<span class="btn cstyle anchor copyanchor scrollanchor link noborder notitle interactive"><button type="button" title="Copy link to clipboard"><i class="fa-fw fas fa-link fa-lg"></i></button></span></h2>
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<p>To run a syslog server on gokrazy, check out <a href="https://github.com/gokrazy/syslogd" rel="external">https://github.com/gokrazy/syslogd</a>.</p>
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<p>If you want to run your syslog server on a regular Linux distribution, this is
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how I instructed <a href="https://en.wikipedia.org/wiki/Syslog-ng" rel="external">syslog-ng</a> via its
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<code>/etc/syslog-ng/syslog-ng.conf</code> to write syslog messages it received from
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e.g. host <code>gokrazy</code> to <code>/var/log/remote/gokrazy-log</code>:</p>
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<div class="highlight actionbar-wrapper wrap-code" dir="auto"><pre tabindex="0"><code>source net { network(ip(10.0.0.76) transport("udp")); };
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destination remote { file("/var/log/remote/${FULLHOST}-log"); };
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log { source(net); destination(remote); };</code></pre></div>
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<li class="" data-nav-url="/userguide/rsync-backups/index.html"><a class="padding" href="/userguide/rsync-backups/index.html">Permanent data backup with the gokrazy rsync</a></li></ul></li>
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