SRE and reliability¶

Site reliability engineering, observability, chaos engineering, and disaster recovery - everything in the repo about keeping systems up and knowing when they're not. SRE overlaps with observability but pulls in DR patterns, chaos engineering, multi-region design, and the certs that test those.

flowchart LR
  SLO[Define SLOs<br/>availability, latency, error rate] --> OBS[Observability:<br/>logs, metrics, traces]
  OBS --> DET[Detect: alerts on<br/>SLO burn]
  DET --> IR[Incident response:<br/>runbooks, on-call]
  IR --> POSTM[Postmortem +<br/>action items]
  POSTM --> CHAOS[Chaos eng:<br/>verify fixes hold]
  CHAOS --> SLO

Learn¶

• Observability basics - logs, metrics, traces, the three pillars
• Eventual consistency - reliability under partial failure
• Idempotency explained - retry-safe operations are the foundation of resilience
• Regions and availability zones - the geography of resilience
• Queues vs streams - decoupling for reliability

Compare¶

• Observability and monitoring - CloudWatch vs Azure Monitor vs Cloud Operations vs Datadog vs New Relic
• Messaging and queues - SQS, Service Bus, Pub/Sub, Kafka - decoupling layer

Reference¶

• Architecture pattern: disaster recovery - backup/restore, pilot light, warm standby, multi-site
• Architecture pattern: multi-region active-active - the always-on shape
• Architecture pattern: chaos engineering - failure-injection patterns
• Architecture pattern: cell-based architecture - blast-radius reduction
• Troubleshooting: AWS, Azure, GCP, Kubernetes

Build¶

• Set up a monitoring stack - Prometheus + Grafana + Alertmanager
• Run a DR drill - tested failover, measured RTO / RPO

Certify¶

Certs that test reliability and ops:

Associate - AWS SysOps / CloudOps (SOA-C02 / SOA-C03) - the AWS reliability cert - Azure Administrator (AZ-104) - day-2 ops on Azure - GCP Associate Cloud Engineer - Kubernetes CKA - K8s reliability

Professional - AWS DevOps Engineer Pro (DOP-C02) - the SRE-flavored AWS cert - Azure DevOps Engineer Expert (AZ-400) - GCP Professional Cloud DevOps Engineer - GCP Professional Cloud Architect - reliability at scale

Roadmap¶

The career-track view: DevOps / SRE roadmap.

Related topics¶

• Observability - the telemetry foundation SRE depends on
• Kubernetes - K8s ops is the modern SRE day job
• FinOps - reliability and cost are sibling concerns