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Note: In the following we will assume that your instance is called hello (default) as well as that the hostname is hello as well.
Installing the Prometheus Node Exporter If all you want to do is monitor your gokrazy installation, just add the Prometheus node exporter:
gok add github.com/prometheus/node_exporter Installing the Prometheus Time Series Database To install the prometheus monitoring system, add the prometheus program to your gokrazy instance:">
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Note: In the following we will assume that your instance is called hello (default) as well as that the hostname is hello as well.
Installing the Prometheus Node Exporter If all you want to do is monitor your gokrazy installation, just add the Prometheus node exporter:
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Note: In the following we will assume that your instance is called hello (default) as well as that the hostname is hello as well.
Installing the Prometheus Node Exporter If all you want to do is monitor your gokrazy installation, just add the Prometheus node exporter:
gok add github.com/prometheus/node_exporter Installing the Prometheus Time Series Database To install the prometheus monitoring system, add the prometheus program to your gokrazy instance:">
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Note: In the following we will assume that your instance is called hello (default) as well as that the hostname is hello as well.
Installing the Prometheus Node Exporter If all you want to do is monitor your gokrazy installation, just add the Prometheus node exporter:
gok add github.com/prometheus/node_exporter Installing the Prometheus Time Series Database To install the prometheus monitoring system, add the prometheus program to your gokrazy instance:">
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<li><a href="#installing-the-prometheus-node-exporter">Installing the Prometheus Node Exporter</a></li>
<li><a href="#installing-the-prometheus-time-series-database">Installing the Prometheus Time Series Database</a>
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<li><a href="#option-a-build-web-assets">Option A: Build Web Assets</a></li>
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<h1 id="prometheus">Prometheus</h1>
<p><a href="https://github.com/prometheus/prometheus" rel="external">Prometheus</a> is monitoring system and
time series database.</p>
<p><strong>Note</strong>: In the following we will assume that your instance is called <code>hello</code>
(default) as well as that the hostname is <code>hello</code> as well.</p>
<h2 id="installing-the-prometheus-node-exporter">Installing the Prometheus Node Exporter<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>
<p>If all you want to do is monitor your gokrazy installation, just add the
Prometheus <a href="https://github.com/prometheus/node_exporter" rel="external">node exporter</a>:</p>
<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-bash" data-lang="bash"><span style="display:flex;"><span>gok add github.com/prometheus/node_exporter</span></span></code></pre></div>
<h2 id="installing-the-prometheus-time-series-database">Installing the Prometheus Time Series Database<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>
<p>To install the prometheus monitoring system, add the <code>prometheus</code> program to
your gokrazy instance:</p>
<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-bash" data-lang="bash"><span style="display:flex;"><span>gok add github.com/prometheus/prometheus/cmd/prometheus</span></span></code></pre></div>
<p>We need a valid prometheus config for prometheus to start successfully. Start
with the <a href="https://github.com/prometheus/prometheus/blob/main/documentation/examples/prometheus.yml" rel="external">default <code>prometheus.yml</code> from the prometheus
repository</a>.
Save it to your gokrazy instance directory, e.g.
<code>~/gokrazy/hello/prometheus.yml</code>.</p>
<p>Open your instances config.json in your editor:</p>
<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-bash" data-lang="bash"><span style="display:flex;"><span>gok edit</span></span></code></pre></div>
<p>To use the prometheus config file, we need to do two things in the gokrazy
config:</p>
<ol>
<li>Copy over the <code>prometheus.yml</code> with <a href="/userguide/package-config/index.html#extrafiles">Package config: Extra
files</a></li>
<li>Add <a href="/userguide/package-config/index.html#flags">Package config: Command-line flags</a></li>
<li>We also add <code>WaitForClock</code> to get accurate timestamps for our timeseries data</li>
</ol>
<p>Your config should look something like this:</p>
<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;display:grid;"><code class="language-json" data-lang="json"><span style="display:flex;"><span>{
</span></span><span style="display:flex;"><span> <span style="color:#f92672">&#34;Hostname&#34;</span>: <span style="color:#e6db74">&#34;hello&#34;</span>,
</span></span><span style="display:flex;"><span> <span style="color:#f92672">&#34;Packages&#34;</span>: [
</span></span><span style="display:flex;"><span> <span style="color:#e6db74">&#34;github.com/gokrazy/fbstatus&#34;</span>,
</span></span><span style="display:flex;"><span> <span style="color:#e6db74">&#34;github.com/gokrazy/hello&#34;</span>,
</span></span><span style="display:flex;"><span> <span style="color:#e6db74">&#34;github.com/gokrazy/serial-busybox&#34;</span>,
</span></span><span style="display:flex;"><span> <span style="color:#e6db74">&#34;github.com/gokrazy/breakglass&#34;</span>,
</span></span><span style="display:flex;"><span> <span style="color:#e6db74">&#34;github.com/prometheus/prometheus&#34;</span>
</span></span><span style="display:flex;"><span> ],
</span></span><span style="display:flex;"><span> <span style="color:#f92672">&#34;PackageConfig&#34;</span>: {
</span></span><span style="display:flex; background-color:#3c3d38"><span> <span style="color:#f92672">&#34;github.com/prometheus/prometheus&#34;</span>: {
</span></span><span style="display:flex; background-color:#3c3d38"><span> <span style="color:#f92672">&#34;CommandLineFlags&#34;</span>: [
</span></span><span style="display:flex; background-color:#3c3d38"><span> <span style="color:#e6db74">&#34;--config.file=/etc/prometheus/prometheus.yml&#34;</span>
</span></span><span style="display:flex; background-color:#3c3d38"><span> ],
</span></span><span style="display:flex; background-color:#3c3d38"><span> <span style="color:#f92672">&#34;WaitForClock&#34;</span>: <span style="color:#66d9ef">true</span>,
</span></span><span style="display:flex; background-color:#3c3d38"><span> <span style="color:#f92672">&#34;ExtraFilePaths&#34;</span>: {
</span></span><span style="display:flex; background-color:#3c3d38"><span> <span style="color:#f92672">&#34;/etc/prometheus/prometheus.yml&#34;</span>: <span style="color:#e6db74">&#34;prometheus.yml&#34;</span>
</span></span><span style="display:flex; background-color:#3c3d38"><span> }
</span></span><span style="display:flex; background-color:#3c3d38"><span> }
</span></span><span style="display:flex;"><span> }
</span></span><span style="display:flex;"><span>}</span></span></code></pre></div>
<p>Then, deploy as usual:</p>
<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-bash" data-lang="bash"><span style="display:flex;"><span>gok update</span></span></code></pre></div>
<p>In theory, this is enough to deploy prometheus, but unfortunately we are missing
the web assets for the web UI which are not included in our build of prometheus.</p>
<p>You can use prometheus as is, if you never want to go to the web UI on
<code>hello:9090</code>. If you visit the web UI anyway, you will get this (or a similar)
error:</p>
<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-text" data-lang="text"><span style="display:flex;"><span>Error opening React index.html: open web/ui/static/react/index.html: no such file or directory</span></span></code></pre></div>
<p>To get the web UI to work, we first need the missing files. You have two
options:</p>
<h3 id="option-a-build-web-assets">Option A: Build Web Assets<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>
<p>Follow <a href="https://github.com/prometheus/prometheus?tab=readme-ov-file#building-from-source" rel="external">Prometheus → Building from
source</a>,
meaning:</p>
<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-bash" data-lang="bash"><span style="display:flex;"><span>git clone https://github.com/prometheus/prometheus
</span></span><span style="display:flex;"><span>cd prometheus
</span></span><span style="display:flex;"><span>make assets-compress</span></span></code></pre></div>
<p>Instruct gokrazy to use this build of Prometheus:</p>
<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-bash" data-lang="bash"><span style="display:flex;"><span>gok -i hello add .</span></span></code></pre></div>
<p>Configure gokrazy to build Prometheus with the <code>builtinassets</code> <a href="/userguide/instance-config/index.html#packagegobuildtags">Go build
tag</a>:</p>
<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;display:grid;"><code class="language-json" data-lang="json"><span style="display:flex;"><span>{
</span></span><span style="display:flex;"><span> <span style="color:#f92672">&#34;Hostname&#34;</span>: <span style="color:#e6db74">&#34;hello&#34;</span>,
</span></span><span style="display:flex;"><span> <span style="color:#f92672">&#34;Packages&#34;</span>: [
</span></span><span style="display:flex;"><span> <span style="color:#e6db74">&#34;github.com/gokrazy/fbstatus&#34;</span>,
</span></span><span style="display:flex;"><span> <span style="color:#e6db74">&#34;github.com/gokrazy/hello&#34;</span>,
</span></span><span style="display:flex;"><span> <span style="color:#e6db74">&#34;github.com/gokrazy/serial-busybox&#34;</span>,
</span></span><span style="display:flex;"><span> <span style="color:#e6db74">&#34;github.com/gokrazy/breakglass&#34;</span>,
</span></span><span style="display:flex;"><span> <span style="color:#e6db74">&#34;github.com/prometheus/prometheus&#34;</span>
</span></span><span style="display:flex;"><span> ],
</span></span><span style="display:flex;"><span> <span style="color:#f92672">&#34;PackageConfig&#34;</span>: {
</span></span><span style="display:flex; background-color:#3c3d38"><span> <span style="color:#f92672">&#34;github.com/prometheus/prometheus&#34;</span>: {
</span></span><span style="display:flex; background-color:#3c3d38"><span> <span style="color:#f92672">&#34;GoBuildTags&#34;</span>: [
</span></span><span style="display:flex; background-color:#3c3d38"><span> <span style="color:#e6db74">&#34;builtinassets&#34;</span>
</span></span><span style="display:flex; background-color:#3c3d38"><span> ],
</span></span><span style="display:flex;"><span> <span style="color:#f92672">&#34;CommandLineFlags&#34;</span>: [
</span></span><span style="display:flex;"><span> <span style="color:#e6db74">&#34;--config.file=/etc/prometheus/prometheus.yml&#34;</span>
</span></span><span style="display:flex;"><span> ],
</span></span><span style="display:flex;"><span> <span style="color:#f92672">&#34;WaitForClock&#34;</span>: <span style="color:#66d9ef">true</span>,
</span></span><span style="display:flex;"><span> <span style="color:#f92672">&#34;ExtraFilePaths&#34;</span>: {
</span></span><span style="display:flex;"><span> <span style="color:#f92672">&#34;/etc/prometheus/prometheus.yml&#34;</span>: <span style="color:#e6db74">&#34;prometheus.yml&#34;</span>
</span></span><span style="display:flex;"><span> }
</span></span><span style="display:flex;"><span> }
</span></span><span style="display:flex;"><span> }
</span></span><span style="display:flex;"><span>}</span></span></code></pre></div>
<p>To update Prometheus, youll need to update your Prometheus dir instead of using
<code>gok get</code>:</p>
<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-bash" data-lang="bash"><span style="display:flex;"><span>git pull <span style="color:#f92672">&amp;&amp;</span> make assets-compress</span></span></code></pre></div>
<h3 id="option-b-download-web-assets">Option B: Download Web Assets<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>
<p>The web assets are released with every prometheus release and you need to update
them by hand with every new version.</p>
<ol>
<li>Go to <a href="https://github.com/prometheus/prometheus/releases" rel="external">https://github.com/prometheus/prometheus/releases</a></li>
<li>Expand the section &ldquo;Assets&rdquo; for the lastest release</li>
<li>Download <code>prometheus-web-ui-VERSION.tar.gz</code> with <code>VERSION</code> being something
like <code>2.46.0</code>
(example url for version 2.46.0:
<a href="https://github.com/prometheus/prometheus/releases/download/v2.46.0/prometheus-web-ui-2.46.0.tar.gz" rel="external">https://github.com/prometheus/prometheus/releases/download/v2.46.0/prometheus-web-ui-2.46.0.tar.gz</a>)</li>
<li>Extract the archive file: <code>tar xf prometheus-web-ui-2.46.0.tar.gz</code></li>
<li>Enable <a href="https://github.com/gokrazy/breakglass" rel="external">breakglass</a> via gokrazy web</li>
<li>Create the right folder on your device:
<code>ssh hello mkdir -p /perm/home/prometheus/web/ui</code></li>
<li>Copy over the <code>static/</code> directory you exctracted from the tar file:
<code>scp -r static/ hello:/perm/home/prometheus/web/ui</code></li>
<li>Go to <code>hello:9090</code> to check if the web UI is working</li>
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