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Add shutdown details to README

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James Ravn
2017-04-07 11:44:20 +01:00
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commit f706ea8d92
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README.md
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@@ -201,6 +201,22 @@ In `Dockerfile`:
RUN chmod +x /etc/my_init.d/logtime.sh
<a name="environment_variables"></a>
#### Shutting down your process
`/sbin/my_init` handles termination of children processes at shutdown. When it receives a SIGTERM
it will pass the signal onto the child process for correct shutdown. If your process is started with
a shell script, make sure you `exec` the actual process, otherwise the shell will receive the signal
and not your process.
`/sbin/my_init` will terminate processes after a 5 second timeout. This can be adjusted by setting
environment variables:
# Give children processes 5 minutes to timeout
ENV KILL_PROCESS_TIMEOUT=300
# Give all other processes (such as those which have been forked) 5 minutes to timeout
ENV KILL_ALL_PROCESSES_TIMEOUT=300
### Environment variables
If you use `/sbin/my_init` as the main container command, then any environment variables set with `docker run --env` or with the `ENV` command in the Dockerfile, will be picked up by `my_init`. These variables will also be passed to all child processes, including `/etc/my_init.d` startup scripts, Runit and Runit-managed services. There are however a few caveats you should be aware of: