5.2 Rollback Using Git

Git provides rollback capabilities when automation deployment fails.

Rollback Methods

Method 1: Git Revert

# Identify problematic commit
git log --oneline

# Revert specific commit
git revert a3f21c9

# Push revert
git push origin main

# Re-run Terraform/Ansible with reverted code
terraform apply

Method 2: Reset to Previous Commit

# WARNING: Destructive operation
# Reset to previous commit
git reset --hard HEAD~1

# Force push (requires branch protection override)
git push --force-with-lease origin main

Method 3: Terraform State Rollback

# List state versions
terraform state list

# Restore previous state
terraform state pull > backup.tfstate
terraform state push previous-state.tfstate

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Related Sections: - 5.1 Branching Strategy - Chapter 10: Validation & Testing