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#graceful-shutdown

2 stories

Banner: container app never receives SIGTERM because the shell is PID 1

DevOps & CI/CD Bug Report

Every deploy waits 30 seconds and kills jobs: shell-form CMD swallows SIGTERM

Ryan Pham · Jan 28, 2026 · 6 min read

Our queue workers took exactly 30 seconds to stop on every deploy and lost the job they were processing. Exit code 137 in every pod. The Dockerfile used shell-form CMD, so /bin/sh was PID 1 and never forwarded SIGTERM to Node. Exec form plus a real shutdown handler fixed it.

Banner: Kubernetes rolling update where traffic hits pods that are starting up or shutting down

Cloud & Infrastructure Bug Report

502 and 503 spikes on every Kubernetes rollout: readiness probes, preStop and graceful shutdown

Daniel Tran · Feb 20, 2025 · 8 min read

Every deploy of our Go pricing API produced 30 to 60 seconds of 502 and 503 errors. New pods got traffic before they were ready, and old pods exited while the ingress still routed to them. A readiness probe, a preStop sleep and real graceful shutdown made rollouts clean.