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Prometheus guides
Hands-on guides that cover Prometheus. Every command is run and verified on a live server before it is published.
GuideMetrics from Your Server
node_exporter reads your Ubuntu server's CPU, memory, disk, and load, then publishes them as Prometheus metrics. Install it and read the raw numbers yourself.
GuideCollecting with Prometheus
Prometheus scrapes your exporters every few seconds and stores the history. Write the scrape config, point it at your targets, and confirm both report up.
GuideAlerting Before Users Notice
Turn PromQL queries into Prometheus alerting rules that page you before an outage, then route them through Alertmanager with two habits that beat noise.