Maintenance Guide
Maintenance Overview
graph TD subgraph Regular Tasks Updates[System Updates] Backups[Backup Tasks] Monitoring[Health Checks] end subgraph Periodic Tasks Audit[Security Audits] Cleanup[Resource Cleanup] Review[Config Review] end Updates --> Verify[Verification] Backups --> Test[Backup Testing] Monitoring --> Alert[Alert Response]
Regular Maintenance
Daily Tasks
- Monitor system health
- Check cluster status
- Review resource usage
- Verify backup completion
- Check alert status
Weekly Tasks
- Review system logs
- Check storage usage
- Verify backup integrity
- Update documentation
Monthly Tasks
- Security updates
- Certificate rotation
- Resource optimization
- Performance review
Update Procedures
Flux Updates
graph LR PR[Pull Request] --> Review[Review Changes] Review --> Test[Test Environment] Test --> Deploy[Deploy to Prod] Deploy --> Monitor[Monitor Status]
Application Updates
- Review release notes
- Test in staging if available
- Update flux manifests
- Monitor deployment
- Verify functionality
Backup Management
Backup Strategy
graph TD Apps[Applications] --> Data[Data Backup] Config[Configurations] --> Git[Git Repository] Secrets[Secrets] --> Vault[Secret Storage] Data --> Verify[Verification] Git --> Verify Vault --> Verify
Backup Verification
- Regular restore testing
- Data integrity checks
- Recovery time objectives
- Backup retention policy
Resource Management
Cleanup Procedures
-
Remove unused resources
- Orphaned PVCs
- Completed jobs
- Old backups
- Unused configs
-
Storage optimization
- Compress old logs
- Archive unused data
- Clean container cache
Monitoring and Alerts
Key Metrics
- Node health
- Pod status
- Resource usage
- Storage capacity
- Network performance
Alert Response
- Acknowledge alert
- Assess impact
- Investigate root cause
- Apply fix
- Document resolution
Security Maintenance
Regular Tasks
graph TD Audit[Security Audit] --> Review[Review Findings] Review --> Update[Update Policies] Update --> Test[Test Changes] Test --> Document[Document Changes]
Security Checklist
- Review network policies
- Check certificate expiration
- Audit access controls
- Review secret rotation
- Scan for vulnerabilities
Troubleshooting Guide
Common Issues
-
Node Problems
- Check node status
- Review system logs
- Verify resource usage
- Check connectivity
-
Storage Issues
- Verify mount points
- Check permissions
- Monitor capacity
- Review I/O performance
-
Network Problems
- Check DNS resolution
- Verify network policies
- Review ingress status
- Test connectivity
Recovery Procedures
- Node Recovery
# Check node status
kubectl get nodes
# Drain node for maintenance
kubectl drain node-name
# Perform maintenance
# ...
# Uncordon node
kubectl uncordon node-name
- Storage Recovery
# Check PV status
kubectl get pv
# Check PVC status
kubectl get pvc
# Verify storage class
kubectl get sc
Documentation
Maintenance Logs
- Keep detailed records
- Document changes
- Track issues
- Update procedures
Review Process
- Regular documentation review
- Update procedures
- Verify accuracy
- Add new sections
Best Practices
-
Change Management
- Use git workflow
- Test changes
- Document updates
- Monitor results
-
Resource Management
- Regular cleanup
- Optimize usage
- Monitor trends
- Plan capacity
-
Security
- Regular audits
- Update policies
- Monitor access
- Review logs