[tripleo-podman] Install specific version of buildah

tripleo_podman_buildah_login.yml playbook from tripleo_podman
role is used in periodic jobs in upstream & downstream to push
containers.

In CentOS/RHEL, buildah comes from multiple repos, sometimes
untested package from diffferent repo get installed causing
issues. Making it parameterized will help to install specific
version of buildah and avoid breakage.

Change-Id: I751452d4f60ceedd099f76e8127694a96a0b9549
Signed-off-by: Chandan Kumar (raukadah) <chkumar@redhat.com>
(cherry picked from commit bc80c2aa89)

tripleo_ansible/roles/tripleo-podman/defaults/main.yml

@@ -21,6 +21,7 @@ tripleo_container_registry_insecure_registries: []
 tripleo_container_registry_login: false
 tripleo_container_registry_logins: {}
 tripleo_podman_packages: "{{ _tripleo_podman_packages | default([]) }}"
+tripleo_buildah_packages: "{{ _tripleo_buildah_packages | default([]) }}"
 tripleo_podman_purge_packages: "{{ _tripleo_podman_purge_packages | default([]) }}"
 tripleo_podman_tls_verify: true
 tripleo_podman_debug: false

tripleo_ansible/roles/tripleo-podman/tasks/tripleo_podman_buildah_login.yml

@@ -14,12 +14,23 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+- name: Gather variables for each operating system for installing buildah
+  include_vars: "{{ item }}"
+  with_first_found:
+    - skip: true
+      files:
+        - "{{ ansible_distribution | lower }}-{{ ansible_distribution_version | lower }}.yml"
+        - "{{ ansible_distribution | lower }}-{{ ansible_distribution_major_version | lower }}.yml"
+        - "{{ ansible_os_family | lower }}-{{ ansible_distribution_major_version | lower }}.yml"
+        - "{{ ansible_distribution | lower }}.yml"
+        - "{{ ansible_os_family | lower }}-{{ ansible_distribution_version.split('.')[0] }}.yml"
+        - "{{ ansible_os_family | lower }}.yml"
 
 - name: ensure buildah is installed
   become: true
   package:
-    name: "buildah"
+    name: "{{ tripleo_buildah_packages }}"
-    state: latest
+    state: present
 
 - name: Perform container registry login(s) with buildah
   become: true

tripleo_ansible/roles/tripleo-podman/vars/redhat.yml

@@ -18,6 +18,9 @@
 _tripleo_podman_packages:
   - podman
 
+_tripleo_buildah_packages:
+  - buildah-1.11.6
+
 _tripleo_podman_purge_packages:
   - docker
   - docker-ce