Monitoring & Logging
advancedTopic 10 of 11 in Cloud & DevOps
What it is
Monitoring tracks the health and performance of your applications and infrastructure in real time. Logging captures detailed records of what happened, so you can debug issues after the fact.
Why cloud & devops developers need it
You cannot fix what you cannot see. Monitoring alerts you when things break, and logs tell you why. Together, they are essential for keeping production systems reliable.
What to learn
Metrics, logs, and traces (the three pillars of observability)
Prometheus for metrics collection
Grafana for dashboards and visualisation
Log aggregation: ELK stack, CloudWatch, Loki
Alerting: setting thresholds and notifications
Application Performance Monitoring (APM)
Structured logging best practices
Incident response and post-mortems
Practice project
Monitoring Dashboard
Set up Prometheus and Grafana for a web app. Instrument the app to expose custom metrics (request count, response time), create a Grafana dashboard, and configure an alert for high error rates.