ansible: swift: Fix swift-object-expirer restart loop

The swift-object-expirer is provided by the 'openstack-swift-proxy'
package and thus it is unavailable on swift-object image. This change
adds a new Docker image to fulfill this requirement and stop using
swift-object image in this case.

This image is needed while RDO does not fix the packaging. The issue
is being tracked in:

  https://bugzilla.redhat.com/show_bug.cgi?id=1382921

Change-Id: Idc7ee92d756d8923da2198ede33abf5ed1142041
Closes-Bug: 1630425

ansible/roles/swift/defaults/main.yml

@@ -20,6 +20,10 @@ swift_object_image: "{{ docker_registry ~ '/' if docker_registry else '' }}{{ do
 swift_object_tag: "{{ openstack_release }}"
 swift_object_image_full: "{{ swift_object_image }}:{{ swift_object_tag }}"
 
+swift_object_expirer_image: "{{ docker_registry ~ '/' if docker_registry else '' }}{{ docker_namespace }}/{{ kolla_base_distro }}-{{ kolla_install_type }}-swift-object-expirer"
+swift_object_expirer_tag: "{{ openstack_release }}"
+swift_object_expirer_image_full: "{{ swift_object_expirer_image }}:{{ swift_object_expirer_tag }}"
+
 swift_rsyncd_image: "{{ docker_registry ~ '/' if docker_registry else '' }}{{ docker_namespace }}/{{ kolla_base_distro }}-{{ kolla_install_type }}-swift-rsyncd"
 swift_rsyncd_tag: "{{ openstack_release }}"
 swift_rsyncd_image_full: "{{ swift_rsyncd_image }}:{{ swift_rsyncd_tag }}"

ansible/roles/swift/tasks/start.yml

@@ -218,7 +218,7 @@
   kolla_docker:
     action: "start_container"
     common_options: "{{ docker_common_options }}"
-    image: "{{ swift_object_image_full }}"
+    image: "{{ swift_object_expirer_image_full }}"
     name: "swift_object_expirer"
     volumes:
       - "{{ node_config_directory }}/swift/:/var/lib/kolla/swift/:ro"

docker/swift/swift-object-expirer/Dockerfile.j2

@@ -0,0 +1,25 @@
+FROM {{ namespace }}/{{ image_prefix }}swift-base:{{ tag }}
+MAINTAINER {{ maintainer }}
+
+{% block swift_object_expirer_header %}{% endblock %}
+
+{% import "macros.j2" as macros with context %}
+
+{% if install_type == 'binary' %}
+    {% if base_distro in ['centos', 'fedora', 'oraclelinux', 'rhel'] %}
+        # RDO has it packaged in the wrong package for now. The issue is being
+        # tracked in https://bugzilla.redhat.com/show_bug.cgi?id=1382921
+        {% set swift_object_expirer_packages = ['openstack-swift-proxy'] %}
+    {% elif base_distro in ['ubuntu'] %}
+        {% set swift_object_expirer_packages = ['swift-object'] %}
+    {% endif %}
+
+{{ macros.install_packages(swift_object_expirer_packages | customizable("packages")) }}
+
+{% endif %}
+
+{% block swift_object_expirer_footer %}{% endblock %}
+{% block footer %}{% endblock %}
+{{ include_footer }}
+
+USER swift