📦 Installation Command
apt install prometheus prometheus-node-exporter
Prometheus Monitoring Port & Configuration
prometheus systemctl: prometheusTime-series database and monitoring system. Pull-based metrics collection, powerful PromQL.
🔌 Default Ports
9090
tcp
Prometheus web UI and API
9100
tcp
Node Exporter metrics
⚙️ Configuration Files
/etc/prometheus/prometheus.yml/etc/default/prometheus
📂 Default Directories
- config:
/etc/prometheus - data:
/var/lib/prometheus - logs:
/var/log/prometheus - rules:
/etc/prometheus/rules
🔐 Default Credentials
Username:N/A (no auth by default)
Password:N/A
💡 No built-in auth. Use reverse proxy with auth or --web.config.file for basic auth.
⚠️ Conflicts
✅ Works With
🛡️ Security Notes
Don't expose to internet without auth, use TLS, restrict scrape targets, use alertmanager for notifications
❓ Frequently Asked Questions
What port does Prometheus use?
Prometheus uses port 9090 for its web UI and API.
Where is Prometheus config?
Config at /etc/prometheus/prometheus.yml.
How does Prometheus collect metrics?
Prometheus scrapes metrics from targets defined in prometheus.yml at configured intervals.