Push monasca/base image on commit, periodicaly and on release

Remove docker `files` check.
This check works only in `check` and `gate` steps, but is not
functioning properly in `post` step and always fail resulting
in not pushed images of monasca/base.

Change-Id: Id960e831948ee87e078688e43b864b22a6ee11ae

.zuul.yaml

@@ -29,6 +29,12 @@
       jobs:
         - docker-publish-monasca-base
         - legacy-monasca-common-localrepo-upload
+    periodic:
+      jobs:
+        - docker-publish-monasca-base
+    release:
+      jobs:
+        - docker-publish-monasca-base
 
 - job:
     name: docker-build-monasca-base
@@ -38,8 +44,6 @@
     required-projects:
       - openstack/monasca-common
     attempts: 1
-    files:
-      - ^docker\/(?!example).*
     irrelevant-files:
       - ^.*\.rst$
       - ^.*\.md$

docker/build_base_image.sh

@@ -10,11 +10,10 @@ BASE_GIT_COMMIT=$(git rev-parse --verify HEAD)
 [ -z "${BASE_GIT_COMMIT}" ] && echo "No git commit hash found" && exit 1
 
 BASE_CREATION_TIME=$(date -u +"%Y-%m-%dT%H:%M:%SZ")
-# Docker tags don't like colons so use shorter version of ISO 8601 for them.
-BASE_CREATION_TIME_SHORT=$(date -d "$BASE_CREATION_TIME" -u +"%Y%m%dT%H%M%SZ")
+
+: "${MONASCA_COMMON_TAG:="master"}"
 
 docker build --no-cache \
     --build-arg BASE_CREATION_TIME="$BASE_CREATION_TIME" \
     --build-arg BASE_GIT_COMMIT="$BASE_GIT_COMMIT" \
-    --tag monasca/base:master \
-    --tag monasca/base:"$BASE_CREATION_TIME_SHORT" .
+    --tag monasca/base:"$MONASCA_COMMON_TAG" .

playbooks/run.yml

@@ -13,6 +13,8 @@
 
     - name: Build monasca-base Docker image
       shell: "{{ zuul.project.src_dir }}/docker/build_base_image.sh"
+      environment:
+        MONASCA_COMMON_TAG: "{{ zuul.tag if zuul.pipeline == 'release' else zuul.branch | basename }}"
       become: true
 
     - name: List images