mysql-server : Depends: mysql-server-5.5 but it is not going to be installed

[zoobab]

Mysql fails to inszall, probably because the mirrors moved:

See also for a better copy/paste:

https://pastee.org/pqpkm

• 16:40 root@turmes ~/docker-monit (master)# docker build -t TAG . Uploading context 72.7 kB Uploading context Step 0 : FROM ubuntu:12.04 ---> 74fe38d11401 Step 1 : MAINTAINER Shoichi Kaji (skaji@cpan.org) ---> Using cache ---> 371a2ef419e4 Step 2 : ENV DEBIAN_FRONTEND noninteractive ---> Using cache ---> 71e3eebd4c22 Step 3 : RUN echo "deb http://jp.archive.ubuntu.com/ubuntu precise main universe" > /etc/apt/sources.list ---> Using cache ---> 4d98a47ef272 Step 4 : RUN apt-get update -y --force-yes ---> Using cache ---> 36955b37768b Step 5 : RUN apt-get install monit -y --force-yes ---> Using cache ---> 76d243cb100b Step 6 : ADD monitrc /etc/monit/monitrc ---> Using cache ---> bc3f00f9b5de Step 7 : RUN chown root:root /etc/monit/monitrc ---> Using cache ---> 2c3aa0223cfd Step 8 : RUN chmod 700 /etc/monit/monitrc ---> Using cache ---> 9aa913c4bda7 Step 9 : RUN bash -c 'echo "root:root" | chpasswd' ---> Using cache ---> b2b5ba37b05f Step 10 : RUN apt-get install openssh-server -y --force-yes ---> Using cache ---> 782621f7eaba Step 11 : RUN mkdir /var/run/sshd ---> Using cache ---> 81651ddbf903 Step 12 : RUN chown root:root /var/run/sshd ---> Using cache ---> 81a2272fcae8 Step 13 : RUN chmod 700 /var/run/sshd ---> Using cache ---> a9f9d737f2dc Step 14 : ADD monit.sshd /etc/monit/conf.d/sshd ---> Using cache ---> 14f1cb6e2917 Step 15 : RUN chown root:root /etc/monit/conf.d/sshd ---> Using cache ---> 73d835155855 Step 16 : RUN chmod 700 /etc/monit/conf.d/sshd ---> Using cache ---> 06939e952b93 Step 17 : ADD debconf-set-selections /root/debconf-set-selections ---> Using cache ---> 2fa1ec6fc341 Step 18 : RUN cat /root/debconf-set-selections | debconf-set-selections; apt-get install mysql-server -y --force-yes ---> Running in dd5f7a5d6f0d

Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation:

The following packages have unmet dependencies: mysql-server : Depends: mysql-server-5.5 but it is not going to be installed : Unable to correct problems, you have held broken packages. 2014/05/21 16:43:21 build: The command [/bin/sh -c cat /root/debconf-set-selections | debconf-set-selections; apt-get install mysql-server -y --force-yes] returned a non-zero code: 100 zsh: exit 1 docker build -t TAG .

[skaji]

Thank you for reporting this.

In https://github.com/shoichikaji/docker-monit/commit/beb0a301f8acf963a5e8ac7c691b4b3935cba4c2, I changed /etc/apt/sources.list so that apt-get select a mirror close to you.

BTW this docker image has some problems. eg: there is no init process which reaps zombie processes. I recently noticed https://github.com/phusion/baseimage-docker is much better.

[zoobab]

Thanks, it seems to fix the issue.

About the missing init, do you think it is the source of the defuncts processes?

BTW I have those defuncts problems with other distros as well, so that might be monit related.

[skaji]

Quote from https://github.com/phusion/baseimage-docker:

According to the Unix process model, the init process -- PID 1 -- inherits all orphaned child processes and must reap them. Most Docker containers do not have an init process that does this correctly, and as a result their containers become filled with zombie processes over time.

So if we run monit as the PID 1 process, monit must have a responsibility for reaping orphaned child processes. But monit doesn't have such a feature.

I recommend you to use baseimage-docker instead.