Add metacontroller for kubeflow 1.4

.flake8

@@ -0,0 +1,9 @@
+[flake8]
+max-line-length = 99
+select: E,W,F,C,N
+exclude:
+  venv
+  .git
+  build
+  dist
+  *.egg_info

.github/workflows/integrate.yaml

@@ -0,0 +1,75 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+
+jobs:
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Install dependencies
+      run: |
+        sudo apt update
+        sudo apt install tox
+    - name: Lint code
+      run: tox -vve lint
+
+  unit:
+    name: Unit Tests
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install dependencies
+        run: pip install tox
+      - name: Run unit tests
+        run: tox -vve unit
+
+  integration:
+    name: Integration Tests
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Setup operator environment
+      uses: charmed-kubernetes/actions-operator@main
+      with:
+        provider: microk8s
+
+    # TODO: Remove once the actions-operator does this automatically
+    - name: Configure kubectl
+      run: |
+        sg microk8s -c "microk8s config > ~/.kube/config"
+
+    - name: Test
+      run: |
+        sg microk8s -c "tox -vve integration -- --model testing"
+
+      # On failure, capture debugging resources
+    - name: Get all
+      run: kubectl get all -A
+      if: failure()
+
+    - name: Describe deployments
+      run: kubectl describe deployments -A
+      if: failure()
+
+    - name: Describe replicasets
+      run: kubectl describe replicasets -A
+      if: failure()
+
+    - name: Get juju status
+      run: juju status
+      if: failure()
+
+    - name: Get application logs
+      run: kubectl logs -n testing --tail 1000 -ljuju-app=metacontroller-operator
+      if: failure()
+
+    - name: Get application operator logs
+      run: kubectl logs -n testing --tail 1000 -ljuju-operator=metacontroller-operator
+      if: failure()

.github/workflows/publish.yaml

@@ -0,0 +1,45 @@
+name: Publish
+
+on:
+  push:
+    branches:
+      # TODO: Set this to 'main' when ready to publish
+      - master
+
+jobs:
+  charm:
+    name: Charm
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Check out code
+      uses: actions/checkout@v2
+
+    - name: Install dependencies
+      run: |
+        set -eux
+        sudo snap install charm --classic
+        sudo pip3 install charmcraft=
+        sudo snap install yq
+
+    - name: Publish charm
+      env:
+        CHARMSTORE_CREDENTIAL: ${{ secrets.CHARMSTORE_CREDENTIAL }}
+      run: |
+        set -eux
+        echo $CHARMSTORE_CREDENTIAL > ~/.go-cookies
+
+        CS_URL="cs:~kubeflow-charmers/metacontroller-operator"
+
+        # TODO: Make this loop over all resources
+        IMAGE=$(yq eval '.resources.noop.upstream-source' metadata.yaml)
+        charmcraft build
+        docker pull $IMAGE
+        charm push ./*.charm $CS_URL --resource oci-image=$IMAGE
+
+        REVISION=$(charm show $CS_URL --channel unpublished --format yaml | yq e .id-revision.Revision -)
+        OCI_VERSION=$(charm list-resources $CS_URL --format yaml --channel unpublished | yq e .0.revision -)
+        charm release \
+            --channel edge \
+            --resource oci-image-$OCI_VERSION \
+            $CS_URL-$REVISION

.gitignore

@@ -0,0 +1,8 @@
+venv/
+build/
+.tox/
+*.charm
+
+.coverage
+__pycache__/
+*.py[cod]

.jujuignore

@@ -0,0 +1,3 @@
+/venv
+*.py[cod]
+*.charm

charmcraft.yaml

@@ -0,0 +1,25 @@
+# Learn more about charmcraft.yaml configuration at:
+# https://juju.is/docs/sdk/charmcraft-config
+type: "charm"
+bases:
+  - build-on:
+    - name: "ubuntu"
+      channel: "20.04"
+    run-on:
+    - name: "ubuntu"
+      channel: "20.04"
+parts:
+# TODO/DEBUG: Including the below kubectl and charm parts USUALLY causes an infinite loop during `charmcraft pack`.
+# Omitting for now...
+  kubectl:
+    plugin: dump
+    source: .
+    override-pull: |
+      curl -sSLO https://dl.k8s.io/release/v1.22.1/bin/linux/amd64/kubectl
+      chmod +x kubectl
+    build-packages:
+      - curl
+  charm:
+    charm-python-packages: [setuptools, pip]  # Fixes jinja install during pack
+#    prime:
+#      - ./files/manifests/*.yaml

metadata.yaml

@@ -0,0 +1,22 @@
+name: metacontroller-operator
+display-name: Metacontroller-operator
+description: |
+  Metacontroller is an add-on for Kubernetes to make it easier to write and deploy custom controllers,
+  reducing the need for boilerplate code.
+
+  https://github.com/metacontroller/metacontroller
+summary: An add-on for Kubernetes to write and deploy custom controllers from simple scripts
+
+# Do I need this at all?  This would be if I'm maintaining things via pebble?
+containers:
+  noop:
+    resource: noop
+
+resources:
+  noop:
+    type: oci-image
+    description: ''
+    upstream-source: alpine
+
+# TODO: I don't really need this oci-image, everything gets downloaded by k8s.  This is really a config arg.  Will refactor
+# TODO: Try with recent metacontroller.  This is 3 years old...  Kubeflow Pipelines has a merged change with update

requirements.txt

@@ -0,0 +1,4 @@
+ops >= 1.2.0
+jinja2 < 4
+oci-image<1.1.0
+kubernetes < 19.0.0