Unable to install docker when using the latest centos7 image due to systemd file conflicts

[sidharta-s]

The issue can be reproduced using the simple Dockerfile shown below.

q (07:09:57) ~/test$ cat Dockerfile.test
FROM docker.io/centos:centos7
RUN yum install -y docker
CMD ["/bin/bash"]
q (07:10:03) ~/test$ docker build -f Dockerfile.test .

This results in errors like these :

Transaction check error:
  file /usr/lib64/libsystemd-daemon.so.0 from install of systemd-libs-219-19.el7.x86_64 conflicts with file from package systemd-container-libs-208.20-6.el7.centos.x86_64
  file /usr/lib64/libsystemd-id128.so.0 from install of systemd-libs-219-19.el7.x86_64 conflicts with file from package systemd-container-libs-208.20-6.el7.centos.x86_64
  file /usr/lib64/libsystemd-journal.so.0 from install of systemd-libs-219-19.el7.x86_64 conflicts with file from package systemd-container-libs-208.20-6.el7.centos.x86_64
  file /usr/lib64/libsystemd-login.so.0 from install of systemd-libs-219-19.el7.x86_64 conflicts with file from package systemd-container-libs-208.20-6.el7.centos.x86_64
  file /usr/lib64/libudev.so.1 from install of systemd-libs-219-19.el7.x86_64 conflicts with file from package systemd-container-libs-208.20-6.el7.centos.x86_64
  file /usr/lib64/security/pam_systemd.so from install of systemd-libs-219-19.el7.x86_64 conflicts with file from package systemd-container-libs-208.20-6.el7.centos.x86_64

In case it matters, I am running docker engine 1.9.0 on CentOS 7.1 .

[jperrin]

Correct. This is caused by the removal of systemd-container from 7.2. Do a new docker pull centos:7 to resolve it.

[sidharta-s]

I'll try this out, thanks!

[buley]

Is there a webhook anywhere we can use to update our Centos base images when a build is shipped?

[jperrin]

I know there have been several attempts at submitting a feature like this to docker, but I don't think any of them have been merged in yet. I would check with docker folks to see.

[buley]

Thanks @jperrin. I'll investigate. I use a CentOS base image to which add my user needs, etc. Anything that ran yum update in the Dockerfile broke following this change, since my base image wasn't updated but those containers using it were updating their packages.

[sidharta-s]

It looks like using an older image 7.1 image causes issues when installing docker. This fails :

q (19:58:30) ~/test$ cat Dockerfile.test
FROM docker.io/centos:centos7.1.1503
RUN yum install -y docker-1.8.2
CMD ["/bin/bash"]
q (19:58:32) ~/test$ docker build -f Dockerfile.test .

[jperrin]

point-in-time releases will require added attention, yes. This is because the 7.1.1503 container is trying to pull from current repositories. You'll have to apply updates and work around systemd-container vs systemd dep issues.

[jay-johnson]

Had to update my base image like @buley. Thanks for the fix @jperrin