[tripleo] Issue finding /etc/docker directory in Centos 8 Overcloud Deployment

Alex Schultz aschultz at redhat.com
Sat Oct 23 04:47:36 UTC 2021

Depends on your desired feature configuration.


In train on CentOS 8 you need to specify podman.yaml for containerized
deployment due to the lack of docker.


It's -e /use/share/openstack-tripleo-heat-templates/environments/podman.yaml

This was switched in Ussuri but because train could be installed on 7 or 8
it had this issue.

On Fri, Oct 22, 2021, 10:39 PM Anirudh Gupta <anyrude10 at gmail.com> wrote:

> Hi Alex
> Thanks for your reply.
> I am relatively new to TripleO, Can you please suggest what environment
> files are necessary to be passed?
> Regards
> Anirudh Gupta
> On Fri, 22 Oct, 2021, 8:34 pm Alex Schultz, <aschultz at redhat.com> wrote:
>> You need to specify the podman environment file for the overcloud
>> deploy.  You are missing some environment files that are necessary to
>> deploy. You can't just run `openstack overcloud deploy --templates`.  You
>> should be passing addition files for configuration and networking related
>> parameters.
>> On Fri, Oct 22, 2021, 8:53 AM Anirudh Gupta <anyrude10 at gmail.com> wrote:
>>> Hi Team,
>>> I am trying to install Tripleo Train Release on Centos 8
>>> I have successfully installed Undercloud.
>>> For overcloud images, I have downloaded and uploaded images given on
>>> rdo_trunk
>>> https://images.rdoproject.org/centos8/train/rdo_trunk/current-tripleo/
>>> For deployment of overcloud, I executed the command
>>> openstack overcloud deploy --templates
>>> This command successfully creates a stack, executed the SSH on the
>>> machines successfully and then started some ansible tasks.
>>> During execution of ansible tasks, it gave a error at below task
>>> TASK | manage /etc/docker/daemon.json
>>> *The error message clearly states that directory /etc/docker is not
>>> found.*
>>> This task is present at path "
>>> */usr/share/ansible/roles/container-registry/tasks/docker.yml"*
>>> Since, in Centos 8 docker has been replaced with Podman, this error is
>>> bound to happen
>>> Commenting this particular task can be a workaround, but I have no idea
>>> what would be the impact of this.
>>> There are multiple tasks which makes use of /etc/docker directory
>>> Is there any way to resolve this?
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