CI: Build a matrix of images

RUNTIME={docker,cri-containerd} × NETWORK={weave,bridge}

Building the ISOs took long enough that things occasionally timed out during
testing. Perhaps increasing the resource class would help there, but for now
just build (and discard) tar versions of each.

Eventually it might be nice to publish the results as artifacts, however they
are quite large so doing so for every PR would be a bit much. Docker based
images are 1.5G (master) + 900M (node) and cri-containerd ones are 600M (for
both). Remember we would likely want iso-bios and iso-efi so doubling the size.

Signed-off-by: Ian Campbell <ijc@docker.com>

.circleci/config.yml

@@ -67,6 +67,51 @@ image_cache_build: &image_cache_build
         root: /workspace
         paths: packages
 
+image_build: &image_build
+  docker:
+    - image: debian:stretch
+  steps:
+    - run:
+        name: Configure $PATH
+        command: echo 'export PATH=/workspace/bin:$PATH' >> $BASH_ENV
+    - run:
+        name: Install packages
+        # ca-certificates are needed for attach_workspace (and git over https)
+        command: apt-get update && apt-get install -y ca-certificates curl git make openssh-client
+    - attach_workspace:
+        at: /workspace
+    - checkout
+    - setup_remote_docker:
+        version: 17.06.1-ce
+    - run:
+        name: Importing packages from workspace
+        command: |
+          docker image load --input /workspace/packages/kubelet.tar
+          case "$KUBE_RUNTIME" in
+          docker)
+              docker image load --input /workspace/packages/kubernetes-docker-image-cache-common.tar
+              docker image load --input /workspace/packages/kubernetes-docker-image-cache-control-plane.tar
+              ;;
+          cri-containerd)
+              docker image load --input /workspace/packages/cri-containerd.tar
+              ;;
+          *)
+              echo "Unknown $KUBE_RUNTIME"
+              exit 1
+              ;;
+          esac
+          echo
+          docker image ls --all
+    - run:
+        name: Build images
+        command: |
+          mkdir -p /workspace/images/kube-$KUBE_RUNTIME-$KUBE_NETWORK
+          df -h .
+          # KUBE_FORMATS="iso-efi iso-bios" times out or fails for larger docker images.
+          # Just do tar for now.
+          make KUBE_FORMATS="tar" kube-master.iso kube-node.iso
+          #mv kube-master*.iso kube-node*.iso /workspace/images/kube-$KUBE_RUNTIME-$KUBE_NETWORK
+
 version: 2
 jobs:
   dependencies:
@@ -144,6 +189,32 @@ jobs:
   pkg-image-cache-control-plane:
     <<: *image_cache_build
 
+  image-docker-weave:
+    <<: *image_build
+    # Needs to be configured/enabled by CircleCI person
+    #resource_class: large
+    environment:
+      - KUBE_RUNTIME: docker
+      - KUBE_NETWORK: weave
+  image-docker-bridge:
+    <<: *image_build
+    # Needs to be configured/enabled by CircleCI person
+    #resource_class: large
+    environment:
+      - KUBE_RUNTIME: docker
+      - KUBE_NETWORK: bridge
+
+  image-cri-containerd-weave:
+    <<: *image_build
+    environment:
+      - KUBE_RUNTIME: cri-containerd
+      - KUBE_NETWORK: weave
+  image-cri-containerd-bridge:
+    <<: *image_build
+    environment:
+      - KUBE_RUNTIME: cri-containerd
+      - KUBE_NETWORK: bridge
+
   pkgs:
     docker:
       - image: debian:stretch
@@ -192,9 +263,41 @@ workflows:
       - pkg-image-cache-control-plane:
           requires:
             - dependencies
+
+      - image-docker-weave:
+          requires:
+            - dependencies
+            - pkg-kubelet
+            - pkg-image-cache-common
+            - pkg-image-cache-control-plane
+      - image-docker-bridge:
+          requires:
+            - dependencies
+            - pkg-kubelet
+            - pkg-image-cache-common
+            - pkg-image-cache-control-plane
+      - image-cri-containerd-weave:
+          requires:
+            - dependencies
+            - pkg-kubelet
+            - pkg-cri-containerd
+      - image-cri-containerd-bridge:
+          requires:
+            - dependencies
+            - pkg-kubelet
+            - pkg-cri-containerd
+
       - pkgs:
+          # We want everything to have passed, which is a bit
+          # tedious. Some of these are already covered transitively,
+          # but be more explicit.
           requires:
+            - check-hashes
             - pkg-kubelet
             - pkg-cri-containerd
             - pkg-image-cache-common
             - pkg-image-cache-control-plane
+            - image-docker-weave
+            - image-docker-bridge
+            - image-cri-containerd-weave
+            - image-cri-containerd-bridge