Resources
Technical Runbooks
Battle-tested operational procedures from our incident response team. Copy, paste, resolve.
Kubernetes
CrashLoopBackOff Recovery
- Check pod logs: kubectl logs <pod>
- Describe pod for events: kubectl describe pod <pod>
- Check OOM: look for "OOMKilled" in last state
- Fix: update resource limits or fix application error
- Verify: watch pod restart count stabilize
PostgreSQL
Replication Lag Recovery
- Check lag: SELECT pg_last_wal_replay_lsn()
- Identify cause: long-running queries, I/O bottleneck, network
- If I/O: increase WAL sender buffer, check IOPS
- If query: pg_terminate_backend() the blocker
- Monitor: check pg_stat_replication continuously
Security
AWS IAM Key Rotation
- Create new access key via IAM console or CLI
- Update all applications with new key
- Verify traffic flowing with new key (CloudTrail)
- Wait 24h to confirm no legacy usage
- Deactivate then delete old key
Incident Response
Production Outage Checklist
- Page on-call engineer (PagerDuty)
- Open incident channel in Slack
- Check dashboards: Grafana → service overview
- Check recent deploys: git log --since="2 hours ago"
- Communicate: update status page within 10 min
CI/CD
Failed Deployment Rollback
- Identify failed deploy: check CI pipeline logs
- Rollback: kubectl rollout undo deployment/<name>
- Verify: kubectl rollout status deployment/<name>
- Check: curl health endpoint, verify 200
- Post-mortem: tag failed commit, create issue
AWS
EBS Volume Full Recovery
- SSH/SSM into instance
- Find full volume: df -h, identify mount point
- Clear space: logs, tmp, old deploy artifacts
- If root vol: extend via AWS console → modify volume
- Resize filesystem: sudo growpart + resize2fs
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