rollback-strategy

name	rollback-strategy
description	回滚策略 — 更新失败时的安全回滚机制，保护系统状态不被破坏
version	1.0.0
license	MIT
metadata	{"author":"blackplume233","actant-tags":"rollback,safety,recovery,updater","layer":"auxiliary","agent":"updater"}

Rollback Strategy

Overview

Safe rollback mechanism when updates fail; protect system state from corruption.

Pre-Update Snapshot

• Create full snapshot of config, state, and critical data before update
• Store snapshot in versioned backup location (e.g., .backups/pre-update-{timestamp})
• Include checksums for integrity verification

Rollback Triggers

Trigger	Condition	Action
Health check failure	Post-update health probe fails	Immediate rollback
Test failure	Smoke tests or regression tests fail	Rollback and alert
Timeout	Update exceeds max allowed duration	Abort and rollback
User abort	User cancels during update	Clean rollback

Rollback Procedure

1. Config restore: Revert config files to pre-update snapshot
2. Dependency downgrade: Reinstall previous package versions from lockfile
3. State recovery: Restore persisted state (sessions, caches) from backup
4. Verification: Run post-rollback health check

Post-Rollback Verification

• Confirm system is operational; run minimal smoke tests
• Report rollback success/failure to user; suggest manual inspection if needed
• Preserve rollback logs for debugging