CI: Move image building to a role

This role can be then used in kolla-ansible instead of setup_gate.sh

Change-Id: Ibf04bd90a15e7d3949214d15a8b8e25f2050bb65

.zuul.d/base.yaml

@@ -146,6 +146,7 @@
       kolla_logs_dir: "{{ zuul_output_dir }}/logs/kolla"
       kolla_build_logs_dir: "{{ kolla_logs_dir }}/build"
       virtualenv_path: "/tmp/kolla-virtualenv"
+      kolla_build_template_overrides_path: "{{ zuul.executor.work_root }}/{{ zuul.projects['opendev.org/openstack/kolla'].src_dir }}/tests/templates/template_overrides.j2"
 
 - job:
     name: kolla-base-podman

roles/kolla-build/defaults/main.yml

@@ -0,0 +1,4 @@
+---
+kolla_build_logs_dir: "{{ zuul_output_dir }}/logs/kolla/build"
+kolla_build_template_overrides_path: ""
+kolla_build_venv_path: "/tmp/kolla-virtualenv"

roles/kolla-build/tasks/main.yml

@@ -0,0 +1,16 @@
+---
+- name: Template template_overrides.j2
+  ansible.builtin.template:
+    src: "{{ kolla_build_template_overrides_path }}"
+    dest: /etc/kolla/template_overrides.j2
+  when: kolla_build_template_overrides_path | length > 0
+
+- name: Run kolla-build to template out dockerfiles
+  ansible.builtin.command:
+    cmd: >-
+      {{ kolla_build_venv_path }}/bin/kolla-build --template-only
+      --work-dir {{ kolla_build_logs_dir }}/work_dir
+
+- name: Run kolla-build
+  ansible.builtin.command:
+    cmd: "{{ kolla_build_venv_path }}/bin/kolla-build"

tests/playbooks/run.yml

@@ -38,13 +38,5 @@
     - import_role:
         name: kolla-build-config
 
-    - name: Template template_overrides.j2
-      template:
-        src: "{{ zuul.executor.work_root }}/{{ zuul.project.src_dir }}/tests/templates/template_overrides.j2"
-        dest: /etc/kolla/template_overrides.j2
-
-    - name: Run kolla-build to template out dockerfiles
-      command: "{{ virtualenv_path }}/bin/kolla-build --template-only --work-dir {{ kolla_build_logs_dir }}/work_dir"
-
-    - name: Run kolla-build
-      command: "{{ virtualenv_path }}/bin/kolla-build"
+    - import_role:
+        name: kolla-build