refactor: CI only pulls each minikube once for each kubernetes version

.github/workflows/build.yml

@@ -1,39 +1,73 @@
-name: Build
+name: Build with Kubernetes
 
 env:
   MAVEN_ARGS: -V -ntp -e
 
 on:
   workflow_call:
+    inputs:
+      kube-version:
+        type: string
+        required: true
 
 jobs:
+  set_up_kubernetes:
+    name: Set up Kubernetes ${{ inputs.kube-version }}
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Minikube
+        uses: manusa/[email protected]
+        with:
+          minikube version: 'v1.34.0'
+          kubernetes version: '${{ inputs.kube-version }}'
+          driver: 'docker'
+          github token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Save minikube directory
+        id: minikube
+        run: |
+          echo "minikube-dir=$MINIKUBE_HOME" >> $GITHUB_OUTPUT
+
+      - name: Upload minikube
+        uses: actions/upload-artifact@v4
+        with:
+          name: minikube-${{ inputs.kube-version }}
+          path: ${{ steps.minikube.outputs.minikube-dir }}
+          include-hidden-files: true
+
   integration_tests:
+    name: "JDK: ${{ matrix.java }}, IT category: ${{ matrix.it-category }}"
+    needs: set_up_kubernetes
     strategy:
       matrix:
         java: [ 17, 21 ]
-        kubernetes: [ 'v1.29.12','1.30.8', '1.31.4', '1.32.0' ]
         it-category: [ 'baseapi', 'dependent', 'workflow' ]
     uses: ./.github/workflows/integration-tests.yml
     with:
+      kube-version: ${{ inputs.kube-version }}
       java-version: ${{ matrix.java }}
-      kube-version: ${{ matrix.kubernetes }}
       it-category: ${{ matrix.it-category }}
 
   http_client_tests:
+    name: "JDK: ${{ matrix.java }}, IT category: ${{ matrix.it-category }}, HTTP client: ${{ matrix.httpclient }}"
+    needs: set_up_kubernetes
     strategy:
       matrix:
         java: [ 17, 21 ]
-        kubernetes: [ 'v1.29.12','1.30.8', '1.31.4', '1.32.0' ]
         it-category: [ 'baseapi' ]
         httpclient: [ 'vertx', 'jdk', 'jetty' ]
     uses: ./.github/workflows/integration-tests.yml
     with:
+      kube-version: ${{ inputs.kube-version }}
       java-version: ${{ matrix.java }}
-      kube-version: ${{ matrix.kubernetes }}
       it-category: ${{ matrix.it-category }}
       http-client: ${{ matrix.httpclient }}
 
   special_integration_tests:
+    name: "Special integration tests (${{ matrix.java }})"
+    needs: set_up_kubernetes
     runs-on: ubuntu-latest
     strategy:
       matrix:
@@ -47,3 +81,13 @@ jobs:
           java-version: ${{ matrix.java }}
       - name: Run Special Integration Tests
         run: ./mvnw ${MAVEN_ARGS} -B package -P minimal-watch-timeout-dependent-it --file pom.xml
+
+  delete_kubernetes:
+    needs: [ integration_tests, http_client_tests, special_integration_tests ]
+    if: always()
+    name: Delete Kubernetes ${{ inputs.kube-version }} artifact
+    runs-on: ubuntu-latest
+    steps:
+      - uses: geekyeggo/delete-artifact@v5
+        with:
+          name: minikube-${{ inputs.kube-version }}

.github/workflows/integration-tests.yml

@@ -28,6 +28,7 @@ on:
 
 jobs:
   integration_tests:
+    name: "Experimental: ${{ inputs.experimental }}, Checkout ref: ${{ inputs.checkout-ref }}"
     runs-on: ubuntu-latest
     continue-on-error: ${{ inputs.experimental }}
     timeout-minutes: 40
@@ -43,13 +44,18 @@ jobs:
           distribution: temurin
           java-version: ${{ inputs.java-version }}
           cache: 'maven'
-      - name: Set up Minikube
-        uses: manusa/actions[email protected]
+      - name: Download minikube artifact for Kubernetes ${{ inputs.kube-version }}
+        uses: actions/download-artifact@v4
         with:
-          minikube version: 'v1.34.0'
-          kubernetes version: '${{ inputs.kube-version }}'
-          driver: 'docker'
-          github token: ${{ secrets.GITHUB_TOKEN }}
+          name: minikube-${{inputs.kube-version}}
+          path: minikube
+      - name: Start minikube with Kubernetes ${{ inputs.kube-version }}
+        run: |
+          # wait for docker
+          docker version -f '{{.Server.Version}} - {{.Client.Version}}'
+          export MINIKUBE_HOME=$PWD/minikube
+          minikube start --driver=docker
+          kubectl version
       - name: "${{inputs.it-category}} integration tests (kube: ${{ inputs.kube-version }} / java: ${{ inputs.java-version }} / client: ${{ inputs.http-client }})"
         run: |
           if [ -z "${{inputs.it-category}}" ]; then
@@ -59,4 +65,4 @@ jobs:
           fi
           echo "Using profile: ${it_profile}"
           ./mvnw ${MAVEN_ARGS} -T1C -B install -DskipTests -Pno-apt --file pom.xml
-          ./mvnw ${MAVEN_ARGS} -T1C -B package -P${it_profile} -Dfabric8-httpclient-impl.name=${{inputs.http-client}} --file pom.xml
+          ./mvnw ${MAVEN_ARGS} -T1C -B package -P${it_profile} -Dfabric8-httpclient-impl.name=${{inputs.http-client}} --file pom.xml

.github/workflows/pr.yml

@@ -31,4 +31,10 @@ jobs:
         run: ./mvnw ${MAVEN_ARGS} clean install -Pno-apt --file pom.xml
 
   build:
-    uses: ./.github/workflows/build.yml
+    name: Integration tests with Kubernetes ${{ matrix.kubernetes }}
+    strategy:
+      matrix:
+        kubernetes: [ 'v1.29.12','1.30.8', '1.31.4', '1.32.0' ]
+    uses: ./.github/workflows/build.yml
+    with:
+      kube-version: ${{ matrix.kubernetes }}