Start making 3.8 python images

base and builder are currently pinned to 3.7, which makes it hard
to consider upgrading to python-3.8. To help with that, make
python-3.7 and python-3.8 images, but point latest as 3.7 for the
time being. Then add version-specific provides and FROM lines
so that we can start being deliberate and clear about our version
choice.

Change-Id: Ibf1d846d5c4a005547785124567ce2900e272a7a

.zuul.yaml

@@ -56,7 +56,7 @@
     name: system-config-build-image-jinja-init
     description: Build a jinja-init image.
     parent: system-config-build-image
-    requires: python-base-container-image
+    requires: python-base-3.7-container-image
     provides: jinja-init-container-image
     vars: &jinja-init_vars
       docker_images:
@@ -71,7 +71,7 @@
     name: system-config-upload-image-jinja-init
     description: Build and upload a jinja-init image.
     parent: system-config-upload-image
-    requires: python-base-container-image
+    requires: python-base-3.7-container-image
     provides: jinja-init-container-image
     vars: *jinja-init_vars
     files: *jinja-init_files
@@ -150,7 +150,7 @@
     name: system-config-build-image-haproxy-statsd
     description: Build a haproxy-statsd image.
     parent: system-config-build-image
-    requires: python-base-container-image
+    requires: python-base-3.7-container-image
     vars: &haproxy-statsd_vars
       docker_images:
         - context: docker/haproxy-statsd
@@ -164,7 +164,7 @@
     name: system-config-upload-image-haproxy-statsd
     description: Build and upload a haproxy-statsd image.
     parent: system-config-upload-image
-    requires: python-base-container-image
+    requires: python-base-3.7-container-image
     vars: *haproxy-statsd_vars
     files: *haproxy-statsd_files
 
@@ -511,63 +511,146 @@
     vars: *gerrit_vars_master
     files: *gerrit_files_master
 
-# python-builder jobs
+# python-builder-3.7 jobs
 - job:
-    name: system-config-build-image-python-builder
-    description: Build a python-builder image.
+    name: system-config-build-image-python-builder-3.7
+    description: Build a python-builder-3.7 image.
     parent: system-config-build-image
-    provides: python-builder-container-image
-    vars: &python-builder_vars
+    provides:
+      - python-builder-container-image
+      - python-builder-3.7-container-image
+    vars: &python-builder_3_7_vars
       docker_images:
         - context: docker/python-builder
           repository: opendevorg/python-builder
-    files: &python-builder_files
+          tags:
+            - 3.7
+            - latest
+          build_args:
+            - PYTHON_VERSION=3.7
+    files: &python-builder_3_7_files
       - docker/python-base/.*
       - docker/python-builder/.*
 
 - job:
-    name: system-config-upload-image-python-builder
-    description: Build and upload a python-builder image.
+    name: system-config-upload-image-python-builder-3.7
+    description: Build and upload a python-builder-3.7 image.
     parent: system-config-upload-image
-    provides: python-builder-container-image
-    vars: *python-builder_vars
-    files: *python-builder_files
+    provides:
+      - python-builder-container-image
+      - python-builder-3.7-container-image
+    vars: *python-builder_3_7_vars
+    files: *python-builder_3_7_files
 
 - job:
-    name: system-config-promote-image-python-builder
-    description: Promote a previously published python-builder image to latest.
+    name: system-config-promote-image-python-builder-3.7
+    description: Promote a previously published python-builder-3.7 image to latest.
     parent: system-config-promote-image
-    vars: *python-builder_vars
-    files: *python-builder_files
+    vars: *python-builder_3_7_vars
+    files: *python-builder_3_7_files
 
-# python-base jobs
+# python-builder-3.8 jobs
 - job:
-    name: system-config-build-image-python-base
-    description: Build a python-base image.
+    name: system-config-build-image-python-builder-3.8
+    description: Build a python-builder-3.8 image.
     parent: system-config-build-image
-    provides: python-base-container-image
-    vars: &python-base_vars
+    provides:
+      - python-builder-3.8-container-image
+    vars: &python-builder_3_8_vars
+      docker_images:
+        - context: docker/python-builder
+          repository: opendevorg/python-builder
+          tags:
+            - 3.8
+          build_args:
+            - PYTHON_VERSION=3.8
+    files: &python-builder_3_8_files
+      - docker/python-base/.*
+      - docker/python-builder/.*
+
+- job:
+    name: system-config-upload-image-python-builder-3.8
+    description: Build and upload a python-builder-3.8 image.
+    parent: system-config-upload-image
+    provides: python-builder-3.8-container-image
+    vars: *python-builder_3_8_vars
+    files: *python-builder_3_8_files
+
+- job:
+    name: system-config-promote-image-python-builder-3.8
+    description: Promote a previously published python-builder-3.8 image to latest.
+    parent: system-config-promote-image
+    vars: *python-builder_3_8_vars
+    files: *python-builder_3_8_files
+
+# python-base-3.7 jobs
+- job:
+    name: system-config-build-image-python-base-3.7
+    description: Build a python-base-3.7 image.
+    parent: system-config-build-image
+    provides:
+      - python-base-container-image
+      - python-base-3.7-container-image
+    vars: &python-base-3_7_vars
       docker_images:
         - context: docker/python-base
           repository: opendevorg/python-base
-    files: &python-base_files
+          tags:
+            - 3.7
+            - latest
+          build_args:
+            - PYTHON_VERSION=3.7
+    files: &python-base-3_7_files
       - docker/python-base/.*
       - docker/python-builder/.*
 
 - job:
-    name: system-config-upload-image-python-base
-    description: Build and upload a python-base image.
+    name: system-config-upload-image-python-base-3.7
+    description: Build and upload a python-base-3.7 image.
     parent: system-config-upload-image
-    provides: python-base-container-image
-    vars: *python-base_vars
-    files: *python-base_files
+    provides: python-base-3.7-container-image
+    vars: *python-base-3_7_vars
+    files: *python-base-3_7_files
 
 - job:
-    name: system-config-promote-image-python-base
-    description: Promote a previously published python-base image to latest.
+    name: system-config-promote-image-python-base-3.7
+    description: Promote a previously published python-base-3.7 image to latest.
     parent: system-config-promote-image
-    vars: *python-base_vars
-    files: *python-base_files
+    vars: *python-base-3_7_vars
+    files: *python-base-3_7_files
+
+# python-base-3.8 jobs
+- job:
+    name: system-config-build-image-python-base-3.8
+    description: Build a python-base-3.8 image.
+    parent: system-config-build-image
+    provides: python-base-3.8-container-image
+    vars: &python-base-3_8_vars
+      docker_images:
+        - context: docker/python-base
+          repository: opendevorg/python-base
+          tags:
+            - 3.8
+          build_args:
+            - PYTHON_VERSION=3.8
+    files: &python-base-3_8_files
+      - docker/python-base/.*
+      - docker/python-builder/.*
+
+- job:
+    name: system-config-upload-image-python-base-3.8
+    description: Build and upload a python-base-3.8 image.
+    parent: system-config-upload-image
+    provides: python-base-3.8-container-image
+    vars: *python-base-3_8_vars
+    files: *python-base-3_8_files
+
+- job:
+    name: system-config-promote-image-python-base-3.8
+    description: Promote a previously published python-base-3.8 image to latest.
+    parent: system-config-promote-image
+    vars: *python-base-3_8_vars
+    files: *python-base-3_8_files
 
 # gerrit-base jobs
 - job:
@@ -577,7 +660,7 @@
     required-projects: &gerrit_base_projects
       - opendev/jeepyb
       - opendev/system-config
-    requires: python-builder-container-image
+    requires: python-builder-3.7-container-image
     provides: gerrit-base-container-image
     vars: &gerrit-base_vars
       docker_images:
@@ -591,7 +674,7 @@
     name: system-config-upload-image-gerrit-base
     description: Build and upload a gerrit-base image.
     parent: system-config-upload-image
-    requires: python-builder-container-image
+    requires: python-builder-3.7-container-image
     provides: gerrit-base-container-image
     required-projects: *gerrit_base_projects
     vars: *gerrit-base_vars
@@ -1316,12 +1399,12 @@
         - system-config-build-image-gerrit-base:
             dependencies:
               - name: opendev-buildset-registry
-              - name: system-config-build-image-python-builder
+              - name: system-config-build-image-python-builder-3.7
                 soft: true
         - system-config-build-image-gerrit-2.13:
             dependencies:
               - name: opendev-buildset-registry
-              - name: system-config-build-image-python-builder
+              - name: system-config-build-image-python-builder-3.7
                 soft: true
               - name: system-config-build-image-gerrit-base
                 soft: true
@@ -1351,12 +1434,12 @@
         - system-config-upload-image-gerrit-base:
             dependencies:
               - name: opendev-buildset-registry
-              - name: system-config-upload-image-python-builder
+              - name: system-config-upload-image-python-builder-3.7
                 soft: true
         - system-config-upload-image-gerrit-2.13:
             dependencies:
               - name: opendev-buildset-registry
-              - name: system-config-upload-image-python-builder
+              - name: system-config-upload-image-python-builder-3.7
                 soft: true
               - name: system-config-upload-image-gerrit-base
                 soft: true
@@ -1424,7 +1507,7 @@
         - system-config-build-image-jinja-init:
             dependencies:
               - name: opendev-buildset-registry
-              - name: system-config-build-image-python-base
+              - name: system-config-build-image-python-base-3.7
                 soft: true
         - system-config-build-image-gitea-init:
             dependencies:
@@ -1435,10 +1518,12 @@
         - system-config-build-image-haproxy-statsd:
             dependencies:
               - name: opendev-buildset-registry
-              - name: system-config-build-image-python-base
+              - name: system-config-build-image-python-base-3.7
                 soft: true
-        - system-config-build-image-python-base
-        - system-config-build-image-python-builder
+        - system-config-build-image-python-base-3.7
+        - system-config-build-image-python-base-3.8
+        - system-config-build-image-python-builder-3.7
+        - system-config-build-image-python-builder-3.8
     check-arm64:
       jobs:
         - system-config-run-mirror-arm64
@@ -1473,7 +1558,7 @@
         - system-config-upload-image-jinja-init:
             dependencies:
               - name: opendev-buildset-registry
-              - name: system-config-upload-image-python-base
+              - name: system-config-upload-image-python-base-3.7
                 soft: true
         - system-config-upload-image-gitea-init:
             dependencies:
@@ -1484,18 +1569,22 @@
         - system-config-upload-image-haproxy-statsd:
             dependencies:
               - name: opendev-buildset-registry
-              - name: system-config-upload-image-python-base
+              - name: system-config-upload-image-python-base-3.7
                 soft: true
-        - system-config-upload-image-python-base
-        - system-config-upload-image-python-builder
+        - system-config-upload-image-python-base-3.7
+        - system-config-upload-image-python-base-3.8
+        - system-config-upload-image-python-builder-3.7
+        - system-config-upload-image-python-builder-3.8
     promote:
       jobs:
         - system-config-promote-image-jinja-init
         - system-config-promote-image-gitea-init
         - system-config-promote-image-gitea
         - system-config-promote-image-haproxy-statsd
-        - system-config-promote-image-python-base
-        - system-config-promote-image-python-builder
+        - system-config-promote-image-python-base-3.7
+        - system-config-promote-image-python-base-3.8
+        - system-config-promote-image-python-builder-3.7
+        - system-config-promote-image-python-builder-3.8
     periodic:
       jobs:
         - developer-openstack-goaccess-report

docker/gerrit/base/Dockerfile

@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM docker.io/opendevorg/python-builder as builder
+FROM docker.io/opendevorg/python-builder:3.7 as builder
 
 COPY . /tmp/src
 RUN assemble

docker/haproxy-statsd/Dockerfile

@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM docker.io/opendevorg/python-base
+FROM docker.io/opendevorg/python-base:3.7
 
 COPY haproxy-statsd.py /usr/local/bin
 RUN pip install statsd

docker/jinja-init/Dockerfile

@@ -12,7 +12,7 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-FROM docker.io/opendevorg/python-base as build
+FROM docker.io/opendevorg/python-base:3.7 as build
 
 RUN apt-get update && apt-get -y install \
     git \
@@ -25,7 +25,7 @@ WORKDIR /src/jinja-init
 
 RUN git checkout 8c13a44124a5a363519df787b1cd0abd1198b8df
 
-FROM docker.io/opendevorg/python-base as jinja-init
+FROM docker.io/opendevorg/python-base:3.7 as jinja-init
 
 RUN pip install jinja2
 

docker/python-base/Dockerfile

@@ -13,7 +13,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM docker.io/library/python:3.7-slim
+ARG PYTHON_VERSION=3.7
+FROM docker.io/library/python:${PYTHON_VERSION}-slim
 
 RUN echo 'APT::Install-Recommends "0";' > /etc/apt/apt.conf.d/95disable-recommends
 

docker/python-builder/Dockerfile

@@ -13,7 +13,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM docker.io/library/python:3.7-slim as fake-python
+ARG PYTHON_VERSION=3.7
+FROM docker.io/library/python:${PYTHON_VERSION}-slim as fake-python
 
 WORKDIR /tmp
 RUN apt-get update \
@@ -22,7 +23,7 @@ RUN apt-get update \
 COPY python3-dev.control /tmp/python3-dev.control
 RUN equivs-build /tmp/python3-dev.control
 
-FROM docker.io/library/python:3.7-slim
+FROM docker.io/library/python:${PYTHON_VERSION}-slim
 
 RUN echo 'APT::Install-Recommends "0";' > /etc/apt/apt.conf.d/95disable-recommends