DevOps Intermediate

What is Monitoring?

The practice of collecting, analyzing, and alerting on system metrics and logs to ensure application health and performance.

Monitoring provides visibility into system behavior. Metrics monitoring tracks CPU, memory, disk, and network usage. Application monitoring tracks response times, error rates, and throughput. Log monitoring aggregates and searches through application logs.

Popular tools include Prometheus + Grafana (metrics), ELK Stack (logs), Datadog (full-stack), and PagerDuty (alerting). The three pillars of observability are metrics, logs, and traces.

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Infrastructure as Code (IaC)

The practice of managing infrastructure through machine-readable configuration files rather than manual processes.

An agentless automation tool for configuration management, application deployment, and task automation using YAML playbooks.

A package manager for Kubernetes that simplifies deploying and managing applications using reusable, configurable charts.

A popular log management platform combining Elasticsearch (search), Logstash (processing), and Kibana (visualization).

An open-source automation server for building, testing, and deploying software through configurable CI/CD pipelines.

A tool by HashiCorp for securely managing secrets, encryption keys, and certificates with dynamic secret generation.

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