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EN-C013-029-docker-vps-canary-rollback-lane

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[EN-C013-029] Docker/VPS Canary-Rollback Lane for Agent Infrastructure

Overview​

Instead of all-at-once updates, operators run staged Docker/VPS lanes: shadow, canary, then production, with rollback snapshots wired in from day one.

Use Case​

  • Promote container images through lane-specific compose stacks.
  • Auto-run smoke checks (agent reply, cron execution, tool health) before promotion.
  • Roll back in minutes using image pinning plus state backups when regressions appear.

Tools Used​

  • cron: scheduled health probes and pre-promotion checks
  • exec: compose deploy scripts and snapshot hooks
  • gateway: controlled restarts after validated config patches
  • sessions_spawn: isolated verification runs against staging lanes

Trend Signals (2026 Q1)​

  • Self-hosted operators on GitHub shift from "latest tag" deployment to explicit digest pinning.
  • VPS threads increasingly combine Caddy/Traefik edge controls with policy checks before rollout.
  • Chinese deployment notes call this "灰度发布+秒回滚", focusing on low-drama upgrades for solo maintainers.

Registry ID: EN-029 | Status: Verified | Language: English