Add an example that shows starting apache in the foreground

Signed-off-by: Sven Dowideit <SvenDowideit@home.org.au>
This commit is contained in:
Sven Dowideit 2014-11-18 11:42:54 -08:00
parent 9a917e732c
commit 8d3b13bd7a
1 changed files with 11 additions and 0 deletions

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@ -591,6 +591,17 @@ To examine the result further, you can use `docker exec`:
And you can gracefully request `top` to shut down using `docker stop test`.
The following `Dockerfile` shows using the `ENTRYPOINT` to run Apache in the
foreground (i.e., as `PID 1`):
```
FROM debian:stable
RUN apt-get update && apt-get install -y --force-yes apache2
EXPOSE 80 443
VOLUME ["/var/www", "/var/log/apache2", "/etc/apache2"]
ENTRYPOINT ["/usr/sbin/apache2ctl", "-D", "FOREGROUND"]
```
If you need to write a starter script for a single executable, you can ensure that
the final executable receives the Unix signals by using `exec` and `gosu`
(see [the Dockerfile best practices](/articles/dockerfile_best-practices/#entrypoint)