DEVOPS

Auto-purge then rollback when a deploy cratered the cache-hit ratio

After a Vercel production deploy, if the Cloudflare cache-hit ratio collapses, attempts a targeted cache purge first and re-measures; if it still fails, rolls back the deployment…

CategoryDevOps
Enginesim
Difficultyadvanced
Triggerwebhook
Steps7
Setup~25 min

How it runs

The automated pipeline, trigger to output.

  • TriggerVercel production deploy succeededVercelVercel
  • ActionSample cache-hit ratio after bakeCloudflareCloudflare
  • LogicExit if healthy, continue if collapsed
  • ActionTargeted Cloudflare purge, then re-sampleCloudflareCloudflare
  • LogicStop if recovered, else proceed to rollback
  • ActionRoll back Vercel deploymentVercelVercel
  • OutputFile Linear issue with remediation trailLinearLinear

What it does

This workflow is a self-healing guard for cache regressions. When a production deploy tanks the Cloudflare cache-hit ratio, it first tries the cheap fix, a targeted purge to clear stale or poisoned entries, then re-measures. If the ratio recovers, it stops. If not, it treats the deploy as the cause, rolls back to the previous production deployment, and files a tracked issue.

When to use it

Use it when origin load from a cache miss storm is expensive enough to justify automated remediation. It suits mature teams comfortable with automated rollback who want the system to attempt recovery and escalate to a human only when remediation fails.

How it works

  1. 1A Vercel production deployment-succeeded webhook fires.
  2. 2Sample the Cloudflare cache-hit ratio after a short bake window.
  3. 3Branch: if the ratio is healthy, exit; if it collapsed, continue.
  4. 4Issue a targeted Cloudflare cache purge and wait, then re-sample the ratio.
  5. 5Branch: if recovered, stop; if still failing, roll back the Vercel deployment to the prior production build.
  6. 6File a Linear issue capturing the deploy, the purge attempt, and the rollback for follow-up.

Set it up

What you configure once, before turning it on.

  1. 1
    Connect VercelDeploys, runtime logs, analytics.
  2. 2
    Connect CloudflareWorkers, Pages, R2, KV — the edge stack.
  3. 3
    Connect LinearIssues, projects, cycles, triage.
  4. 4
    Set each agent's modelWe leave models unset so you pick the tier — fast + cheap, or top-quality.
  5. 5
    Tune it to your dataEdit the prompts, filters, and field mappings so it matches how your team works.
  6. 6
    Test, then turn it onRun once against a sample, confirm the output, then enable the trigger.

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