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EN-C008-023-docker-vps-resilient-rollout

English

[EN-C008-023] Docker/VPS Resilient Rollout: Blue-Green with Fast Failover

Overview​

Operators deploy OpenClaw workloads on dual VPS nodes (primary/standby) with Docker Compose profiles, health checks, and tunnel-level rerouting for near-zero downtime maintenance.

Use Case​

  • Blue-green Gateway updates: warm up a standby stack, shift traffic, verify, then retire old primary.
  • Replicated state strategy: periodic sync for non-critical artifacts plus strict backup cadence for config and memory files.
  • Incident posture: watchdog detects unhealthy primary and promotes standby within minutes.

Tools Used​

  • exec: remote orchestration hooks for compose deploy/health scripts
  • cron: continuous health polling and backup verification windows
  • nodes: run diagnostics from geographically different nodes before cutover
  • message: publish deployment status and rollback notices

Trend Signals (2026 Q1)​

  • Reddit r/selfhosted posts highlight Docker+VPS failover patterns (Compose profiles, watchdog, fast promote/demote operations).
  • GitHub homelab repos show increased adoption of automated failover playbooks and tunnel rerouting.
  • Chinese dev communities discuss “线上踩坑复盘 + 推荐配置” as a standard post-deployment practice.

Registry ID: EN-023 | Status: Verified | Language: English