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#sidecar

2 stories

DevOps & CI/CD Bug Report

Istio 503 "upstream connect error" in the first seconds of every pod: app started before the proxy

Sofia Andersson · Oct 14, 2026 · 7 min read

After adding Istio to our EKS cluster, every rollout produced a burst of failures: startup jobs could not reach the database and calls returned 503 upstream connect error. The application started before its Envoy sidecar was ready. How we proved it and fixed it with native sidecars and holdApplicationUntilProxyStarts.

Banner: a finished batch worker leaves while a helper container keeps the lights on in an empty Pod

DevOps & CI/CD Bug Report

Kubernetes Job never completes because the sidecar keeps running: fixing it with native sidecars

John Nguyen · Jul 25, 2026 · 10 min read

Our nightly export finished its work in 20 minutes, yet the Job sat at 0/1 completions for six hours and then failed with DeadlineExceeded. The database proxy sidecar never exited. We replaced shutdown hacks with native sidecars (restartPolicy: Always init containers) and show a full repro.