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kevinveenbirkenbachandClaude Opus 5
2f461b75bf
The generated tcp and http_status probes built their request with echo -e, and echo appends a newline, so the bytes on the wire ended with a stray bare LF after the header terminator of a Connection: close request. uvicorn's h11 reader treats that as trailing data and answers 400 before the handler's 200 reaches the socket, so the probe's grep for a 2xx or 3xx status line never matched and the container stayed unhealthy for good. In compose the name resolves straight to the container, so an unhealthy but running service still served and only the backup drill noticed, failing with litellm is running/unhealthy after 1200s. In swarm a task joins the service VIP only once it is healthy, so the litellm service sat at 0/1 with no backend and every consumer of http://litellm:4000 got ECONNREFUSED, which is where the openwebui model publishing died. The tcp flavor had been masking the same malformed request all along, because its grep for HTTP/1 matches 400 Bad Request as happily as 200. printf is a bash builtin like echo and the probe already requires bash for /dev/tcp, so nothing new is demanded of the image. The new test runs the generated request through bash and compares the bytes. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>