tests: run podman directly instead of using containers.podman

[ptoscano]

Using the containers.podman collection to handle podman is a nice idea, however what that collection supports now is becoming more strict than what this role supports. Case in point: containers.podman now requires Python 3.6+ for the managed nodes, which breaks the testing of EL 7.

This means that sadly the setup of a self-deployed Candlepin needs to run podman commands manually; use the proper parameters for podman run depending on the OS.

The gymnastics of checking the return code & stderr of podman stop are needed because the --ignore option (which would be ideal) was introduced in podman 1.7.0, and EL 7 has podman 1.6.4.

There is no behaviour change.

[ptoscano]

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[ptoscano]

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[ptoscano]

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[ptoscano]

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[richm]

Another way to dynamically construct lists in an assignment statement where you want to omit some of the elements is like this:

    - name: Start Candlepin container
      command:
        argv:
          "{{ podman_run_cli }}"
      changed_when: false
      vars:
        podman_run_cli: [podman, run, --rm, --detach, --hostname, candlepin_host, --name, candlepin, --publish,
                                        8443:8443, --publish, 8080:8080] +
                                        {{ ['--privileged'] if (ansible_distribution in ['CentOS', 'RedHat']
                                            and ansible_distribution_major_version | int < 8)
                                            else [] }} + [ghcr.io/ptoscano/candlepin-unofficial]

Yes, it uses the "json" style of list definition, but I prefer readability to strict adherence of Ansible guidelines

hmm - the indentation is way off - maybe github is auto-indenting something?

[ptoscano]

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