CI: test base container image build in seed jobs

Currently we do not have any coverage of building container images. This
change adds a basic test of building the base image to the seed jobs.

A potential future enhancement could involve pushing to a local registry
running on the seed.

Change-Id: Id7378dd844aca7cb5634535308eba0f60342c81d

playbooks/kayobe-seed-base/overrides.yml.j2

@@ -10,7 +10,9 @@ docker_registry_mirrors:
 kolla_docker_namespace: "openstack.kolla"
 # use the published images from a site mirror of quay.io
 kolla_docker_registry: "{{ zuul_site_mirror_fqdn }}:4447"
-kolla_source_url: "{{ ansible_env.PWD ~ '/' ~ zuul.projects['opendev.org/openstack/kolla'].src_dir }}"
+# NOTE(mgoddard): The kolla repository is copied to /tmp/kolla and made
+# readable by the stack user.
+kolla_source_url: "/tmp/kolla"
 kolla_source_version: "{{ zuul.projects['opendev.org/openstack/kolla'].checkout }}"
 kolla_ansible_source_url: "{{ ansible_env.PWD ~ '/' ~ zuul.projects['opendev.org/openstack/kolla-ansible'].src_dir }}"
 kolla_ansible_source_version: "{{ zuul.projects['opendev.org/openstack/kolla-ansible'].checkout }}"

playbooks/kayobe-seed-base/run.yml

@@ -9,3 +9,21 @@
       shell:
         cmd: "{{ kayobe_src_dir }}/dev/seed-deploy.sh &> {{ logs_dir }}/ansible/seed-deploy"
         executable: /bin/bash
+
+    # NOTE(mgoddard): The stack user cannot read the kolla source code, which
+    # lives in the zuul user's home directory. Copy it to a readable location.
+    - name: Create a readable copy of kolla source code
+      become: true
+      copy:
+        src: "{{ ansible_env.PWD ~ '/' ~ zuul.projects['opendev.org/openstack/kolla'].src_dir }}"
+        dest: /tmp
+        owner: stack
+        group: stack
+        remote_src: true
+
+    - name: Ensure base container image is built
+      shell:
+        cmd: >
+          source {{ kayobe_src_dir }}/dev/environment-setup.sh &&
+          kayobe seed container image build ^base &> {{ logs_dir }}/ansible/container-image-build
+        executable: /bin/bash