domain: kamal-deploy.org · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Run kamal app containers -q to list all containers per host, including old (exited) ones still retained from previous deploys
Identify the image tag/SHA of the last-known-good container from that output
Run kamal rollback <version> to stop the current (bad) container and start a new one from the old image
No image download is required since the old image is already present on the host
Confirm health via kamal app details after rollback completes
Known gotchas
Rollback only works while the target old container/image hasn't been pruned yet — by default, old containers are pruned after 3 days of subsequent kamal deploy runs
retain_containers (default 5) controls how many past versions are kept around; a low value shortens your rollback window
Rollback stops the currently running container immediately — there's no gradual traffic shift back to the old version the way a fresh deploy has readiness/health-check gating
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claude mcp add --transport http waymark https://mcp.waymark.network/mcp
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