Playbooks specify Docker CE 17.03.2 but actually install 18.03.1

[scottslowe]

The "docker" role in the Ansible playbooks specifies to install Docker CE 17.03.2, but when they are run against a CentOS 7.4 host (and this presumably will affect RHEL also, although I haven't tested yet) they actually install Docker CE 18.03.1. This version isn't yet validated for use with Kubernetes (although it may work just fine).

This output was taken from a CentOS 7.4 host after running the playbooks:

[centos@ip-10-16-13-114 ~]$ docker --version
Docker version 18.03.1-ce, build 9ee9f40
[centos@ip-10-16-13-114 ~]$ 

I ran into this problem recently with a customer. When I have a moment, I'll see about creating a PR to port the changes I implemented to fix this issue.

[scottslowe]

Used Wardroom to create some AMIs late last week; the playbooks are now installing Docker CE 18.06.

[scottslowe]

The only workaround I've found is this command:

yum --setopt=obsoletes=0 install docker-ce-selinux-17.03.2.ce docker-ce-17.03.2.ce

[timothysc]

/assign @detiber
/cc @chuckha

[ncdc]

xref moby/moby#33930 (comment)

[scottslowe]

This should be fixed via #83, so I'll go ahead and close this issue now.