https://blog.serviciosrogeliowar.com/en/tags/node-exporter/Recent content in Node-Exporter on Servicios RogeliowarHugo -- gohugo.ioen© 2026 Rogelio Guerra RiverónThu, 30 Apr 2026 00:00:00 +0000https://blog.serviciosrogeliowar.com/en/posts/monitoring-prometheus-grafana-loki/Thu, 30 Apr 2026 00:00:00 +0000https://blog.serviciosrogeliowar.com/en/posts/monitoring-prometheus-grafana-loki/<p>A server without monitoring is a blind server. You don&rsquo;t know when the disk fills up, which container is consuming too much RAM, or how many 404 requests your web is generating. This article documents how I configured the complete stack: <a href="https://prometheus.io/" target="_blank" rel="noreferrer">Prometheus</a> + <a href="https://github.com/prometheus/node_exporter" target="_blank" rel="noreferrer">Node Exporter</a> + <a href="https://grafana.com/" target="_blank" rel="noreferrer">Grafana</a> + <a href="https://grafana.com/oss/loki/" target="_blank" rel="noreferrer">Loki</a> + <a href="https://grafana.com/docs/loki/latest/send-data/promtail/" target="_blank" rel="noreferrer">Promtail</a>.</p> <h2 class="relative group">The architecture <div id="the-architecture" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#the-architecture" aria-label="Anchor">#</a> </span> </h2> <div class="highlight-wrapper"><div class="highlight"><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>[Servidor doméstico] </span></span><span style="display:flex;"><span> ├── node-exporter → métricas del sistema (CPU, RAM, disco, red) </span></span><span style="display:flex;"><span> ├── docker-stats- → métricas de contenedores (textfile collector) </span></span><span style="display:flex;"><span> │ collector </span></span><span style="display:flex;"><span> ├── prometheus → recolecta y almacena métricas </span></span><span style="display:flex;"><span> ├── loki → agrega y almacena logs </span></span><span style="display:flex;"><span> ├── promtail → envía logs de Nginx y syslog a Loki </span></span><span style="display:flex;"><span> └── grafana → dashboards de todo lo anterior</span></span></code></pre></div></div> <p>All services run in Docker, coordinated by the same <code>docker-compose.yml</code>.</p>