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
- Check Ceph cluster health
- Verify CephFS status
- Monitor storage capacity
- Review OSD performance
- Check MDS responsiveness
- Verify PVC mount status
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 Ceph cluster health
kubectl -n rook-ceph get cephcluster
kubectl -n rook-ceph exec -it deploy/rook-ceph-tools -- ceph status

# Check PV status
kubectl get pv

# Check PVC status
kubectl get pvc -A

# Verify storage class
kubectl get sc

# Check CephFS status
kubectl -n rook-ceph exec -it deploy/rook-ceph-tools -- ceph fs status

# Check OSD status
kubectl -n rook-ceph exec -it deploy/rook-ceph-tools -- ceph osd tree

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