proxmox/docs/03-deployment/CHANGE_MANAGEMENT.md

Change Management Process

Last Updated: 2025-01-20
Document Version: 1.0
Status: Active Documentation

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Overview

This document defines the change management process for the Proxmox infrastructure, ensuring all changes are properly planned, approved, implemented, and documented.

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Change Types

Standard Changes

Definition: Pre-approved, low-risk changes that follow established procedures.

Examples:

• Routine maintenance
• Scheduled updates
• Standard VM/container deployments

Process:

• No formal approval required
• Document in change log
• Follow standard procedures

Normal Changes

Definition: Changes that require review and approval but are not emergency.

Examples:

• Network configuration changes
• Storage modifications
• Security updates
• New service deployments

Process:

• Submit change request
• Review and approval
• Schedule implementation
• Document results

Emergency Changes

Definition: Urgent changes required to resolve critical issues.

Examples:

• Security patches
• Critical bug fixes
• Service restoration

Process:

• Implement immediately
• Document during/after
• Post-implementation review
• Retrospective approval

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Change Request Process

1. Change Request Submission

Required Information:

1. Change Details:

   • Description of change
   • Reason for change
   • Expected impact

2. Technical Details:

   • Systems affected
   • Implementation steps
   • Rollback plan

3. Risk Assessment:

   • Risk level (Low/Medium/High)
   • Potential impact
   • Mitigation strategies

4. Timeline:

   • Proposed implementation date
   • Estimated duration
   • Maintenance window (if needed)

2. Change Review

Review Criteria:

1. Technical Review:

   • Feasibility
   • Impact assessment
   • Risk evaluation

2. Business Review:

   • Business impact
   • Resource requirements
   • Timeline alignment

3. Security Review:

   • Security implications
   • Compliance requirements
   • Risk assessment

3. Change Approval

Approval Levels:

• Standard Changes: No approval required
• Normal Changes: Infrastructure lead approval
• High-Risk Changes: Management approval
• Emergency Changes: Post-implementation approval

4. Change Implementation

Pre-Implementation:

1. Preparation:

   • Verify backups
   • Prepare rollback plan
   • Notify stakeholders
   • Schedule maintenance window (if needed)

2. Implementation:

   • Follow documented procedures
   • Document steps taken
   • Monitor for issues

3. Verification:

   • Test functionality
   • Verify system health
   • Check logs for errors

5. Post-Implementation

Activities:

1. Documentation:

   • Update documentation
   • Document any issues
   • Update change log

2. Review:

   • Post-implementation review
   • Lessons learned
   • Process improvements

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Change Request Template

# Change Request

## Change Information
- **Requestor:** [Name]
- **Date:** [Date]
- **Change Type:** [Standard/Normal/Emergency]
- **Priority:** [Low/Medium/High/Critical]

## Change Description
[Detailed description of the change]

## Reason for Change
[Why is this change needed?]

## Systems Affected
[List of systems, VMs, containers, or services]

## Implementation Plan
[Step-by-step implementation plan]

## Rollback Plan
[How to rollback if issues occur]

## Risk Assessment
- **Risk Level:** [Low/Medium/High]
- **Potential Impact:** [Description]
- **Mitigation:** [How to mitigate risks]

## Testing Plan
[How the change will be tested]

## Timeline
- **Proposed Date:** [Date]
- **Estimated Duration:** [Time]
- **Maintenance Window:** [If applicable]

## Approval
- **Reviewed By:** [Name]
- **Approved By:** [Name]
- **Date:** [Date]

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Change Log

Change Log Format

Date	Change ID	Description	Type	Status	Implemented By
2025-01-20	CHG-001	Network VLAN configuration	Normal	Completed	[Name]
2025-01-19	CHG-002	Security patch deployment	Emergency	Completed	[Name]

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Best Practices

1. Plan Ahead:

   • Submit change requests early
   • Allow time for review
   • Schedule during maintenance windows

2. Document Everything:

   • Document all changes
   • Keep change log updated
   • Update procedures

3. Test First:

   • Test in non-production
   • Verify rollback procedures
   • Document test results

4. Communicate:

   • Notify stakeholders
   • Provide status updates
   • Document issues

5. Review Regularly:

   • Review change process
   • Identify improvements
   • Update procedures

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Emergency Change Process

When to Use

• Critical security issues
• Service outages
• Data loss prevention
• Regulatory compliance

Process

1. Implement Immediately:

   • Take necessary action
   • Document as you go
   • Notify stakeholders

2. Post-Implementation:

   • Complete change request
   • Document what was done
   • Conduct review

3. Retrospective:

   • Review emergency change
   • Identify improvements
   • Update procedures

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Related Documentation

• OPERATIONAL_RUNBOOKS.md - Operational procedures
• DISASTER_RECOVERY.md - Disaster recovery
• DEPLOYMENT_READINESS.md - Deployment procedures

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Last Updated: 2025-01-20
Review Cycle: Quarterly