Support Ubuntu build hosts for image managment - Docker only

[cbbayburt]

One of the requirements for the initial Ubuntu support is to make image management working in Ubuntu build hosts.

Tasks

• Adapt various Salt states related to image management
  • https://github.com/uyuni-project/uyuni/tree/ubuntu-support/susemanager-utils/susemanager-sls/salt/images
  • https://github.com/uyuni-project/uyuni/blob/ubuntu-support/susemanager-utils/susemanager-sls/salt/services/docker.sls

[Shirocco88]

Hint: container_build_host Entitlement for Debian-9/10 and Ubuntu-16/18/20 is already enabled;

see https://github.com/uyuni-project/uyuni/blob/master/schema/spacewalk/common/data/rhnServerServerGroupArchCompat.sql#L761

insert into rhnServerServerGroupArchCompat ( server_arch_id, server_group_type)
    values (lookup_server_arch('amd64-debian-linux'),
            lookup_sg_type('container_build_host'));

[Shirocco88]

Hint: at the moment there is OS-Blacklisting for container_build_host Entitlement in MinionServer.java#L134 aktiv.
==> all Ubuntu-/Debian releases are enabled.

https://github.com/uyuni-project/uyuni/blob/master/java/code/src/com/redhat/rhn/domain/server/MinionServer.java#L134
SNIP

     * Return <code>true</code> if OS on this system supports Containerization,
     * <code>false</code> otherwise.
     * <p>
     * Note: For SLES, we are only checking if it's not 10 nor 11.
     * Older than SLES 10 are not being checked.
     * </p>
     *
     * @return <code>true</code> if OS supports Containerization
     */
    @Override
    public boolean doesOsSupportsContainerization() {
        return !isSLES10() && !isSLES11();
    }