Multi multi distro support images

This patch:
1. Resolves an issue where the base image was overrided with python:3.6
2. Adds framework for creating new images of other distributions and
   gating against them.

Change-Id: Iaa8ec86f947189bf24d40e5594e015554f7abddb

.zuul.yaml

@@ -18,15 +18,15 @@
     check:
       jobs:
         - openstack-tox-pep8
-        - spyglass-docker-build-gate
+        - spyglass-docker-build-gate-ubuntu_xenial
     gate:
       jobs:
         - openstack-tox-pep8
-        - spyglass-docker-build-gate
+        - spyglass-docker-build-gate-ubuntu_xenial
     post:
       jobs:
-        - spyglass-docker-publish
         - spyglass-upload-git-mirror
+        - spyglass-docker-publish-ubuntu_xenial
 
 - nodeset:
     name: spyglass-single-node
@@ -35,25 +35,27 @@
         label: ubuntu-xenial
 
 - job:
-    name: spyglass-docker-build-gate
+    name: spyglass-docker-build-gate-ubuntu_xenial
     timeout: 1800
     run: tools/gate/playbooks/docker-image-build.yaml
     nodeset: spyglass-single-node
     vars:
       publish: false
+      distro: ubuntu_xenial
       tags:
         dynamic:
           patch_set: true
 
 - job:
-    name: spyglass-docker-publish
+    name: spyglass-docker-publish-ubuntu_xenial
     timeout: 1800
     run: tools/gate/playbooks/docker-image-build.yaml
-    nodeset: armada-single-node
+    nodeset: spyglass-single-node
     secrets:
       - airship_spyglass_quay_creds
     vars:
       publish: true
+      distro: ubuntu_xenial
       tags:
         dynamic:
           branch: true

Makefile

@@ -12,11 +12,12 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-SPYGLASS_BUILD_CTX  ?= .
+SPYGLASS_BUILD_CTX  ?= spyglass
 IMAGE_NAME          ?= spyglass
 IMAGE_PREFIX        ?= airshipit
 DOCKER_REGISTRY     ?= quay.io
 IMAGE_TAG           ?= latest
+HELM                ?= helm
 PROXY               ?= http://proxy.foo.com:8000
 NO_PROXY            ?= localhost,127.0.0.1,.svc.cluster.local
 USE_PROXY           ?= false
@@ -24,8 +25,11 @@ PUSH_IMAGE        ?= false
 # use this variable for image labels added in internal build process
 LABEL               ?= org.airshipit.build=community
 COMMIT              ?= $(shell git rev-parse HEAD)
-IMAGE             ?= $(DOCKER_REGISTRY)/$(IMAGE_PREFIX)/$(IMAGE_NAME):$(IMAGE_TAG)
+DISTRO              ?= ubuntu_xenial
+IMAGE               ?= $(DOCKER_REGISTRY)/$(IMAGE_PREFIX)/$(IMAGE_NAME):$(IMAGE_TAG)-${DISTRO}
 PYTHON_BASE_IMAGE   ?= python:3.6
+BASE_IMAGE          ?=
+
 export
 
 # Build all docker images for this project
@@ -55,6 +59,8 @@ lint: py_lint
 .PHONY: format
 format: py_format
 
+_BASE_IMAGE_ARG := $(if $(BASE_IMAGE),--build-arg FROM="${BASE_IMAGE}" ,)
+
 .PHONY: build_spyglass
 build_spyglass:
 ifeq ($(USE_PROXY), true)
@@ -62,8 +68,8 @@ ifeq ($(USE_PROXY), true)
 		--label "org.opencontainers.image.revision=$(COMMIT)" \
 		--label "org.opencontainers.image.created=$(shell date --rfc-3339=seconds --utc)" \
 		--label "org.opencontainers.image.title=$(IMAGE_NAME)" \
-		-f images/spyglass/Dockerfile \
+		-f images/spyglass/Dockerfile.$(DISTRO) \
-		--build-arg FROM=$(PYTHON_BASE_IMAGE) \
+		$(_BASE_IMAGE_ARG) \
 		--build-arg http_proxy=$(PROXY) \
 		--build-arg https_proxy=$(PROXY) \
 		--build-arg HTTP_PROXY=$(PROXY) \
@@ -76,8 +82,8 @@ else
 		--label "org.opencontainers.image.revision=$(COMMIT)" \
 		--label "org.opencontainers.image.created=$(shell date --rfc-3339=seconds --utc)" \
 		--label "org.opencontainers.image.title=$(IMAGE_NAME)" \
-		-f images/spyglass/Dockerfile \
+		-f images/spyglass/Dockerfile.$(DISTRO) \
-		--build-arg FROM=$(PYTHON_BASE_IMAGE) \
+		$(_BASE_IMAGE_ARG) \
 		--build-arg ctx_base=$(SPYGLASS_BUILD_CTX) .
 endif
 ifeq ($(PUSH_IMAGE), true)

tools/gate/playbooks/docker-image-build.yaml

@@ -22,6 +22,8 @@
             var: publish
         - debug:
             var: tags
+        - debug:
+            var: distro
         - debug:
             var: zuul
         - debug:
@@ -91,6 +93,7 @@
             chdir: "{{ zuul.project.src_dir }}"
             target: images
             params:
+              DISTRO: "{{ distro }}"
               IMAGE_TAG: "{{ item }}"
           with_items: "{{ image_tags.stdout_lines }}"
 
@@ -115,6 +118,7 @@
             params:
               DOCKER_REGISTRY: "quay.io"
               IMAGE_PREFIX: "airshipit"
+              DISTRO: "{{ distro }}"
               IMAGE_TAG: "{{ item }}"
               COMMIT: "{{ zuul.newrev | default('') }}"
               PUSH_IMAGE: "true"

tools/spyglass.sh

@@ -3,7 +3,7 @@
 set -e
 
 : ${WORKSPACE:=$(pwd)}
-: ${IMAGE:=quay.io/airshipit/spyglass:latest}
+: ${IMAGE:=quay.io/airshipit/spyglass:latest-ubuntu_xenial}
 
 : ${TERM_OPTS:=-t}