Observability · 16 min
Prometheus Alerting With Alertmanager, Slack and Grafana
Write Prometheus alert rules, route them through Alertmanager to a Slack channel, add recovery alerts, and build a node_exporter dashboard in Grafana.
systemd
4 notes
Observability · 22 min
Prometheus Setup: node_exporter, TLS, Docker and Relabeling
Install Prometheus and node_exporter as systemd services, scrape a second VM over TLS with basic auth, monitor Docker with cAdvisor, and apply relabeling and the Pushgateway.
Linux · 4 min
Running Tomcat as a systemd Service
Write a systemd unit that runs Apache Tomcat as a dedicated non-root user, starts it at boot, restarts it after a crash, and is managed with systemctl.
Linux · 16 min
Essential Linux Commands for DevOps
A task-based Linux command reference: navigating and managing files, reading logs, grep, sed, cut and awk, redirection, Vim, services, and basic networking.