Documentation for docker should include details about using --init

[kratsg]

See this (old) blog post: https://blog.phusion.nl/2015/01/20/docker-and-the-pid-1-zombie-reaping-problem/ and this solution (https://github.com/krallin/tini) which is now built into docker via --init. The shell scripts run by shell2http will typically become zombie and won't be cleaned up without --init or an init-script in the docker image.

[msoap]

Hi @kratsg, sorry for dalay, I don't see this problem in my docker containers even if they have been running for months and are heavily used. Could you please provide minimal example like Dockerfile with build/run command and with such issue (and without --init)?

[kratsg]

Hi @msoap that's fine -- see this repo which contains the Dockerfile. Nothing very complicated, but we've observed zombie processes not getting cleaned up over time. The solution is to run the docker image with --init which you can't specify as part of the Dockerfile unless you include tini manually.