Grab logs in the case of errors

More importantly, put the log collection in an always
section of block, otherwise we won't get logs if a
playbook fails, which is pretty much exactly when we
want to get logs.

Change-Id: Ia8e581e522f75a5f5945bc2143eec63b93381a94

playbooks/zuul/run-production-playbook.yaml

@@ -15,31 +15,41 @@
 
 - hosts: bridge.openstack.org
   tasks:
-    - name: Log a playbook start header
-      become: yes
-      shell: 'echo "Running {{ ansible_date_time.iso8601 }}: ansible-playbook -v -f {{ ansible_forks }} /opt/system-config/playbooks/{{ playbook_name }}" > /var/log/ansible/{{ playbook_name }}.log'
+    - name: Ensure run dir
+      file:
+        state: directory
+        path: /var/run/ansible
 
-    - name: Run specified playbook on bridge.o.o and redirect output
-      become: yes
-      shell: 'ansible-playbook -v -f {{ ansible_forks }} /opt/system-config/playbooks/{{ playbook_name }} >> /var/log/ansible/{{ playbook_name }}.log'
+    - name: Run the production playbook and capture logs
+      block:
 
-    # Not using normal zuul job roles as bridge.openstack.org is not a
-    # test node with all the normal bits in place.
-    - name: Collect log output
-      synchronize:
-        dest: "{{ zuul.executor.log_root }}/{{ playbook_name }}.log"
-        mode: pull
-        src: "/var/log/ansible/{{ playbook_name }}.log"
-        verify_host: true
-      when: infra_prod_playbook_collect_log
+      - name: Log a playbook start header
+        become: yes
+        shell: 'echo "Running {{ ansible_date_time.iso8601 }}: ansible-playbook -v -f {{ ansible_forks }} /opt/system-config/playbooks/{{ playbook_name }}" > /var/log/ansible/{{ playbook_name }}.log'
 
-    - name: Return playbook log artifact to Zuul
-      when: infra_prod_playbook_collect_log
-      zuul_return:
-        data:
-          zuul:
-            artifacts:
-              - name: "Playbook Log"
-                url: "{{ playbook_name }}.log"
-                metadata:
-                  type: text
+      - name: Run specified playbook on bridge.o.o and redirect output
+        become: yes
+        shell: 'ansible-playbook -v -f {{ ansible_forks }} /opt/system-config/playbooks/{{ playbook_name }} >> /var/log/ansible/{{ playbook_name }}.log'
+
+      always:
+
+        # Not using normal zuul job roles as bridge.openstack.org is not a
+        # test node with all the normal bits in place.
+        - name: Collect log output
+          synchronize:
+            dest: "{{ zuul.executor.log_root }}/{{ playbook_name }}.log"
+            mode: pull
+            src: "/var/log/ansible/{{ playbook_name }}.log"
+            verify_host: true
+          when: infra_prod_playbook_collect_log
+
+        - name: Return playbook log artifact to Zuul
+          when: infra_prod_playbook_collect_log
+          zuul_return:
+            data:
+              zuul:
+                artifacts:
+                  - name: "Playbook Log"
+                    url: "{{ playbook_name }}.log"
+                    metadata:
+                      type: text