Remove image push logic from installer roles

I’m going to be reusing this code on the Tower side, and I’m trying to refactor some of the AWX specific bits out. There will probably be more to come, but this is a good start.

installer/roles/image_build/tasks/main.yml

@@ -89,11 +89,11 @@
 
 - name: Set awx_web image name
   set_fact:
-    awx_web_image: "{{ awx_web_image|default('awx_web') }}"
+    web_image: "{{ web_image|default('awx_web') }}"
 
 - name: Set awx_task image name
   set_fact:
-    awx_task_image: "{{ awx_task_image|default('awx_task') }}"
+    task_image: "{{ task_image|default('awx_task') }}"
 
 - name: Ensure directory exists
   file:
@@ -195,7 +195,7 @@
       no_proxy: "{{ no_proxy | default('') }}"
     path: "{{ docker_base_path }}"
     dockerfile: Dockerfile
-    name: "{{ awx_web_image }}"
+    name: "{{ web_image }}"
     tag: "{{ awx_version }}"
   delegate_to: localhost
 
@@ -207,11 +207,17 @@
       no_proxy: "{{ no_proxy | default('') }}"
     path: "{{ docker_base_path }}"
     dockerfile: Dockerfile.task
-    name: "{{ awx_task_image }}"
+    name: "{{ task_image }}"
     tag: "{{ awx_version }}"
     pull: no
   delegate_to: localhost
 
+- name: Tag task and web images as latest
+  command: "docker tag {{ item }}:{{ awx_version }} {{ item }}:latest"
+  with_items:
+    - "{{ task_image }}"
+    - "{{ web_image }}"
+
 - name: Clean docker base directory
   file:
     path: "{{ docker_base_path }}"

installer/roles/image_build/templates/Dockerfile.task.j2

@@ -1,4 +1,4 @@
-FROM {{ awx_web_image }}:{{ awx_version }}
+FROM {{ web_image }}:{{ awx_version }}
 USER 0
 RUN sudo yum -y remove nginx
 USER 1000