gps-denied-desktop/_docs/00_templates/rollback_strategy.md

Rollback Strategy Template

Overview

Field	Value
Service/Component	[Name]
Last Updated	[YYYY-MM-DD]
Owner	[Team/Person]
Max Rollback Time	[Target: X minutes]

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Rollback Triggers

Automatic Rollback Triggers

• Health check failures > 3 consecutive
• Error rate > 10% for 5 minutes
• P99 latency > 2x baseline for 5 minutes
• Critical alert triggered

Manual Rollback Triggers

• User-reported critical bug
• Data corruption detected
• Security vulnerability discovered
• Stakeholder decision

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Pre-Rollback Checklist

• Incident acknowledged and documented
• Stakeholders notified of rollback decision
• Current state captured (logs, metrics snapshot)
• Rollback target version identified
• Database state assessed (migrations reversible?)

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Rollback Procedures

Application Rollback

Option 1: Revert Deployment (Preferred)

# Using CI/CD
# Trigger previous successful deployment

# Manual (if needed)
git revert <commit-hash>
git push origin main

Option 2: Blue-Green Switch

# Switch traffic to previous version
# [Platform-specific commands]

Option 3: Feature Flag Disable

# Disable feature flag
# [Feature flag system commands]

Database Rollback

If Migration is Reversible

# Run down migration
# [Migration tool command]

If Migration is NOT Reversible

1. Restore from backup
2. Point-in-time recovery to pre-deployment
3. WARNING: May cause data loss - requires approval

Configuration Rollback

# Restore previous configuration
# [Config management commands]

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Post-Rollback Verification

Immediate (0-5 minutes)

• Service responding to health checks
• No error spikes in logs
• Basic functionality verified

Short-term (5-30 minutes)

• All critical paths functional
• Error rate returned to baseline
• Performance metrics normal

Extended (30-60 minutes)

• No delayed issues appearing
• User reports resolved
• All alerts cleared

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Communication Plan

During Rollback

Audience	Message	Channel
Engineering	"Initiating rollback due to [reason]"	Slack
Stakeholders	"Service issue detected, rollback in progress"	Email
Users	"We're aware of issues and working on a fix"	Status page

After Rollback

Audience	Message	Channel
Engineering	"Rollback complete, monitoring"	Slack
Stakeholders	"Service restored, post-mortem scheduled"	Email
Users	"Issue resolved, service fully operational"	Status page

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Known Limitations

Cannot Rollback If:

• Database migration deleted columns with data
• External API contracts changed
• Third-party integrations updated

Partial Rollback Scenarios

• When only specific components affected
• When data migration is complex

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Recovery After Rollback

Investigation

1. Collect all relevant logs
2. Identify root cause
3. Document findings

Re-deployment Planning

1. Fix identified in development
2. Additional tests added
3. Staged rollout planned
4. Monitoring enhanced

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Rollback Testing

Test Schedule

• Monthly rollback drill
• After major infrastructure changes
• Before critical releases

Test Scenarios

1. Application rollback
2. Database rollback (in staging)
3. Configuration rollback

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Contacts

Role	Name	Contact
On-call
Database Admin
Platform Team