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

  1. Monitor system health
    • Check cluster status
    • Review resource usage
    • Verify backup completion
    • Check alert status

Weekly Tasks

  1. Review system logs
  2. Check storage usage
  3. Verify backup integrity
  4. Update documentation

Monthly Tasks

  1. Security updates
  2. Certificate rotation
  3. Resource optimization
  4. 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

  1. Review release notes
  2. Test in staging if available
  3. Update flux manifests
  4. Monitor deployment
  5. 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

  1. Remove unused resources

    • Orphaned PVCs
    • Completed jobs
    • Old backups
    • Unused configs
  2. 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

  1. Acknowledge alert
  2. Assess impact
  3. Investigate root cause
  4. Apply fix
  5. 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

  1. Node Problems

    • Check node status
    • Review system logs
    • Verify resource usage
    • Check connectivity
  2. Storage Issues

    • Verify mount points
    • Check permissions
    • Monitor capacity
    • Review I/O performance
  3. Network Problems

    • Check DNS resolution
    • Verify network policies
    • Review ingress status
    • Test connectivity

Recovery Procedures

  1. Node Recovery
# Check node status
kubectl get nodes

# Drain node for maintenance
kubectl drain node-name

# Perform maintenance
# ...

# Uncordon node
kubectl uncordon node-name
  1. 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

  1. Regular documentation review
  2. Update procedures
  3. Verify accuracy
  4. Add new sections

Best Practices

  1. Change Management

    • Use git workflow
    • Test changes
    • Document updates
    • Monitor results
  2. Resource Management

    • Regular cleanup
    • Optimize usage
    • Monitor trends
    • Plan capacity
  3. Security

    • Regular audits
    • Update policies
    • Monitor access
    • Review logs