DEVOPS
Block Vercel promote on Datadog Synthetics latency regression
On a manual promote request, triggers the Datadog Synthetic test suite against the Vercel preview and refuses the production promotion if p95 latency or availability falls below…
How it runs
The automated pipeline, trigger to output.
- TriggerManual promote request with deployment ID
- ActionResolve candidate preview URL from VercelVercel
- ActionRun Datadog Synthetic test batch against previewDatadog
- LogicCompare p95 latency and success rate to baseline
- ActionPromote to production or reject the promoteVercel
- OutputNotify Slack and log Datadog event on blockDatadog
What it does
When someone requests a production promote, this workflow kicks off your Datadog Synthetic test batch (API and browser checks) against the candidate Vercel preview URL, waits for results, and compares p95 response time and success rate to the baseline captured from the current production deployment. A regression past the budget blocks the promote and alerts on-call.
When to use it
Use it when latency and uptime, not just front-end scores, are your release gate. Ideal for API-heavy or globally-distributed apps already instrumented with Datadog Synthetics.
How it works
- 1A manual promote request triggers the workflow with the target Vercel deployment ID.
- 2The candidate preview URL is resolved from the Vercel API.
- 3The Datadog Synthetic test batch runs against that URL and the workflow polls until results land.
- 4A branch compares p95 latency and success rate to the baseline budget values.
- 5If the batch passes, the deployment is promoted to production; if it regresses, the promote is rejected.
- 6The outcome is sent to Slack and, on failure, a Datadog event is posted to mark the blocked release.
Set it up
What you configure once, before turning it on.
- 1Connect VercelDeploys, runtime logs, analytics.
- 2Connect DatadogMetrics, traces, log search.
- 3Connect SlackChannels, DMs, threads, mentions.
- 4Set each agent's modelWe leave models unset so you pick the tier — fast + cheap, or top-quality.
- 5Tune it to your dataEdit the prompts, filters, and field mappings so it matches how your team works.
- 6Test, then turn it onRun once against a sample, confirm the output, then enable the trigger.
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