Ubuntu 12.04 in docker "service mysql start"
I need ubuntu 12.04 when developing web services (sshd, apache2.2, php5.3, mysql-server). I have ubuntu 14.04, I have docker installed.
Then I started the container:
docker run -t -i ubuntu:12.04 /bin/bash
Then:
apt-get update && apt-get install -y mysql-server
After that: mysql start service, mysql status service is not running. If I run a container with 14.04 ubuntu it works well. This same issue is related to the sshd server.
apache2 service status, apache2 stop service, apache2 start service works well.
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There is no initialization process in the container. Therefore, the runic level cannot be determined. If there is an unknown runlevel, the upstart cannot start mysql .... see /etc/init/mysql.conf
...
start on runlevel [2345]
...
If you try to check the runlevel:
$ runlevel unknown
... you see it is unknown.
In Docker, this is the usual way to run an application in the foreground.
/usr/bin/mysqld_safe
If you want to run more than one application, you can use supervisord.
https://docs.docker.com/articles/using_supervisord/
Additionally, I found a Dockerfile that runs init inside the ubuntu container: 12.04 docker. Really nice job:
https://github.com/tianon/dockerfiles/blob/master/sbin-init/ubuntu/upstart/12.04/Dockerfile
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