feat: updated to current state of extension development

- action-kit-sdk
- liveness/readiness probes
- helm-chart
- updated dependencies
- linting / auditing in ci

.github/workflows/ci.yml

@@ -11,10 +11,32 @@ on:
       - 'main'
 
 env:
+  REGISTRY: ghcr.io
   IMAGE_NAME: ${{ github.repository }}
 
 jobs:
-  build:
+  audit:
+    name: Audit
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - uses: actions/setup-go@v4
+        with:
+          go-version: '^1.20.0'
+
+      - name: Audit
+        run: |
+          go mod download
+          make audit
+
+  build-images:
+    name: Build Docker Images
+    needs:
+      - audit
     runs-on: ubuntu-latest
     permissions:
       contents: read
@@ -23,37 +45,31 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
 
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v2
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v2
 
-      - uses: actions/setup-go@v3
-        with:
-          go-version: '^1.18.0'
-
-      - name: Execute go tests
-        run: |
-          go mod download
-          go test ./...
-
       - name: Log in to the container registry
         if: github.event_name != 'pull_request'
         uses: docker/login-action@v2
         with:
-          username: ${{ secrets.DOCKER_USERNAME }}
-          password: ${{ secrets.DOCKER_PASSWORD }}
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Extract metadata (tags, labels) for Docker
         id: meta
         uses: docker/metadata-action@v4
         with:
-          images: steadybit/extension-datadog
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
 
       - name: Build and push Docker image
-        uses: docker/build-push-action@v3
+        uses: docker/build-push-action@v4
         with:
           context: ./
           push: ${{ github.event_name != 'pull_request' }}
@@ -64,3 +80,93 @@ jobs:
             NAME=${{ github.repository }}
             VERSION=${{ steps.meta.outputs.version }}
             REVISION=${{ github.sha }}
+
+  test-helm-charts:
+    name: "Test Helm Charts"
+    runs-on: ubuntu-latest
+    needs:
+      - build-images
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - name: Set up Helm
+        uses: azure/setup-helm@v3
+        with:
+          version: v3.9.0
+
+      - name: Add dependency chart repos
+        run: |
+          helm repo add steadybit https://steadybit.github.io/helm-charts
+
+      - uses: actions/setup-python@v4
+        with:
+          python-version: "3.10"
+
+      - name: Add unit testing plugin
+        run: |
+          helm plugin install https://github.com/quintush/helm-unittest
+
+      - name: Run unit tests
+        run: make charttesting
+
+      - name: Set up chart-testing
+        uses: helm/[email protected]
+
+      - name: Run chart-testing (lint)
+        run: ct lint --config chartTesting.yaml
+
+      - name: Run chart-testing (list-changed)
+        id: list-changed
+        run: |
+          changed=$(ct list-changed --config chartTesting.yaml)
+          if [[ -n "$changed" ]]; then
+            echo "::set-output name=changed::true"
+          fi
+
+      - name: Create kind cluster
+        uses: helm/[email protected]
+        if: steps.list-changed.outputs.changed == 'true'
+
+      - name: Run chart-testing (install)
+        run: ct install --config chartTesting.yaml
+
+
+  release-helm-chart:
+    name: "Release Helm Chart"
+    runs-on: ubuntu-latest
+    needs:
+      - test-helm-charts
+    if: github.ref == 'refs/heads/main'
+
+    permissions:
+      contents: write
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - name: Configure Git
+        run: |
+          git config user.name "$GITHUB_ACTOR"
+          git config user.email "[email protected]"
+
+      - name: Install Helm
+        uses: azure/setup-helm@v3
+        with:
+          version: v3.8.1
+
+      - name: Add dependency chart repos
+        run: |
+          helm repo add steadybit https://steadybit.github.io/helm-charts
+
+      - name: Run chart-releaser
+        uses: helm/[email protected]
+        with:
+          charts_dir: charts
+        env:
+          CR_TOKEN: "${{ secrets.GITHUB_TOKEN }}"

.gitignore

@@ -1,2 +1,3 @@
 /extension-datadog
 extension-datadog.iml
+/coverage.out

Dockerfile

@@ -3,7 +3,7 @@
 ##
 ## Build
 ##
-FROM golang:1.19-alpine AS build
+FROM golang:1.20-alpine AS build
 
 ARG NAME
 ARG VERSION
@@ -19,11 +19,11 @@ RUN go mod download
 COPY . .
 
 RUN go build \
-        -ldflags="\
-        -X 'github.com/steadybit/extension-kit/extbuild.ExtensionName=${NAME}' \
-        -X 'github.com/steadybit/extension-kit/extbuild.Version=${VERSION}' \
-        -X 'github.com/steadybit/extension-kit/extbuild.Revision=${REVISION}'" \
-        -o /extension-datadog
+    -ldflags="\
+    -X 'github.com/steadybit/extension-kit/extbuild.ExtensionName=${NAME}' \
+    -X 'github.com/steadybit/extension-kit/extbuild.Version=${VERSION}' \
+    -X 'github.com/steadybit/extension-kit/extbuild.Revision=${REVISION}'" \
+    -o ./extension
 
 ##
 ## Runtime
@@ -39,8 +39,9 @@ USER $USERNAME
 
 WORKDIR /
 
-COPY --from=build /extension-datadog /extension-datadog
+COPY --from=build /app/extension /extension
 
 EXPOSE 8090
+EXPOSE 8091
 
-ENTRYPOINT ["/extension-datadog"]
+ENTRYPOINT ["/extension"]

Makefile

@@ -0,0 +1,77 @@
+# ==================================================================================== #
+# HELPERS
+# ==================================================================================== #
+
+## help: print this help message
+.PHONY: help
+help:
+	@echo 'Usage:'
+	@sed -n 's/^##//p' ${MAKEFILE_LIST} | column -t -s ':' |  sed -e 's/^/ /'
+
+
+# ==================================================================================== #
+# QUALITY CONTROL
+# ==================================================================================== #
+
+## tidy: format code and tidy modfile
+.PHONY: tidy
+tidy:
+	go fmt ./...
+	go mod tidy -v
+
+## audit: run quality control checks
+.PHONY: audit
+audit:
+	go vet ./...
+	go run honnef.co/go/tools/cmd/staticcheck@latest -checks=all,-ST1000,-U1000,-ST1003 ./...
+	go test -race -vet=off -coverprofile=coverage.out ./...
+	go mod verify
+
+## charttesting: Run Helm chart unit tests
+.PHONY: charttesting
+charttesting:
+	for dir in charts/steadybit-extension-*; do \
+    echo "Unit Testing $$dir"; \
+    helm unittest $$dir; \
+  done
+
+## chartlint: Lint charts
+.PHONY: chartlint
+chartlint:
+	ct lint --config chartTesting.yaml
+
+# ==================================================================================== #
+# BUILD
+# ==================================================================================== #
+
+## build: build the extension
+.PHONY: build
+build:
+	go mod verify
+	go build -o=./extension
+
+## run: run the extension
+.PHONY: run
+run: tidy build
+	./extension
+
+## container: build the container image
+.PHONY: container
+container:
+	docker build -t extension-datadog:latest .
+
+# ==================================================================================== #
+# EJECT
+# ==================================================================================== #
+
+## eject: remove / clear up files associated with the scaffold repository
+.PHONY: eject
+eject:
+	rm CHANGELOG.md
+	mv CHANGELOG.SCAFFOLD.md CHANGELOG.md
+	rm CONTRIBUTING.md
+	mv CONTRIBUTING.SCAFFOLD.md CONTRIBUTING.md
+	rm README.md
+	mv README.SCAFFOLD.md README.md
+	rm LICENSE
+	mv LICENSE.SCAFFOLD LICENSE

chartTesting.yaml

@@ -0,0 +1,8 @@
+# See https://github.com/helm/chart-testing#configuration
+remote: origin
+target-branch: main
+chart-dirs:
+  - charts
+chart-repos:
+  - steadybit=https://steadybit.github.io/helm-charts
+helm-extra-args: --timeout 600s

charts/steadybit-extension-datadog/.helmignore

@@ -0,0 +1,24 @@
+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*.orig
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/
+tests/

charts/steadybit-extension-datadog/Chart.lock

@@ -0,0 +1,6 @@
+dependencies:
+- name: extensionlib
+  repository: https://steadybit.github.io/helm-charts
+  version: 1.1.0
+digest: sha256:50f7816a312812729400e1ead5cfe1a89de8aabcc66ff2cc6eac262d0952912b
+generated: "2023-04-20T13:50:40.570522+02:00"

charts/steadybit-extension-datadog/Chart.yaml

@@ -0,0 +1,25 @@
+apiVersion: v2
+name: steadybit-extension-datadog
+description: Steadybit Kubernetes extension Helm chart for Datadog.
+version: 1.4.3
+appVersion: latest
+home: https://www.steadybit.com/
+icon: https://steadybit-website-assets.s3.amazonaws.com/logo-symbol-transparent.png
+maintainers:
+  - email: [email protected]
+    name: reuda
+sources:
+  - https://github.com/steadybit/extension-datadog
+annotations:
+  artifacthub.io/images: |
+    - name: logo
+      image: https://steadybit-website-assets.s3.amazonaws.com/logo-symbol-transparent.png
+  artifacthub.io/links: |-
+    - name: Steadybit website
+      url: https://www.steadybit.com
+    - name: Steadybit reliability hub
+      url: https://hub.steadybit.com
+dependencies:
+  - name: extensionlib
+    version: 1.1.0
+    repository: https://steadybit.github.io/helm-charts

charts/steadybit-extension-datadog/README.md

@@ -0,0 +1,30 @@
+# Steadybit Datadog Extension 
+
+This Helm chart adds the Steadybit Datadog extension to your Kubernetes cluster via a deployment.
+
+## Quick Start
+
+### Add Steadybit Helm repository
+
+```
+helm repo add steadybit https://steadybit.github.io/helm-charts
+helm repo update
+```
+
+### Installing the Chart
+
+To install the chart with the name `steadybit-extension-datadog`. To learn more about supported the supported values for `datadog.siteParameter` and `datadog.siteUrl`, please see [Datadog's site documentation page](https://docs.datadoghq.com/getting_started/site/#access-the-datadog-site). You may alternatively decide to configure the `datadog.*` values through a pre-existing secret. See the documentation for [`datadog.existingSecret`](https://github.com/steadybit/helm-charts/blob/main/charts/steadybit-extension-datadog/values.yaml#L15) to learn more.
+
+```bash
+$ helm upgrade steadybit-extension-datadog \
+    --install \
+    --wait \
+    --timeout 5m0s \
+    --create-namespace \
+    --namespace steadybit-extension \
+    --set datadog.apiKey="{{API_KEY}}" \
+    --set datadog.applicationKey="{{APPLICATION_KEY}}" \
+    --set datadog.siteParameter="datadoghq.eu" \
+    --set datadog.siteUrl="https://app.datadoghq.eu" \
+    steadybit/steadybit-extension-datadog
+```

charts/steadybit-extension-datadog/templates/_helpers.tpl

@@ -0,0 +1,8 @@
+{{/* vim: set filetype=mustache: */}}
+
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "secret.name" -}}
+{{- default "steadybit-extension-datadog" .Values.datadog.existingSecret -}}
+{{- end -}}