workflow: added Integration Tests

.github/workflows/integration.yml

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+# Copyright 2023 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+name: Integration Tests
+
+on:
+  push:
+    branches:
+    - 'main'
+  pull_request:
+
+jobs:
+  collatz:
+    name: Build collatz binary
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        name: Checkout collatz example
+        with:
+          repository: ServiceWeaver/weaver
+          ref: 'v0.15.0'
+      - uses: actions/setup-go@v4
+        with:
+          go-version: '1.20'
+          cache: true
+      - name: Build collatz example
+        working-directory: ./examples/collatz
+        run: |
+          # Disable CGO to ensure the binary is statically linked
+          CGO_ENABLED=0 \
+          go build -o collatz
+      - uses: actions/upload-artifact@v3
+        with:
+          name: collatz-binary
+          path: ./examples/collatz/collatz
+  deploy:
+    name: Deploy and run tests
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    needs: collatz
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-go@v4
+        with:
+          go-version: '1.20'
+          cache: true
+      - uses: azure/setup-kubectl@v3
+      - uses: medyagh/setup-minikube@master
+      - uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Install weaver-kube
+        run: |
+          go install ./cmd/weaver-kube
+      - uses: actions/download-artifact@v3
+        with:
+          name: collatz-binary
+          path: ./examples/collatz
+      - name: Run integration script
+        working-directory: ./examples/collatz
+        run: ../../dev/integration.sh
+        shell: bash
+        env:
+          IMAGE_NAME: ghcr.io/${{ github.repository }}/example-collatz
+      - name: Display deployment logs
+        if: failure()
+        working-directory: ./examples/collatz
+        run: |
+          kubectl get all && \
+          kubectl describe pod -l app_name=collatz && \
+          kubectl logs -l app_name=collatz
+      - uses: actions/upload-artifact@v3
+        if: always()
+        with:
+          name: collatz-kube-manifests
+          path: ./examples/collatz/kube_*.yaml

dev/integration.sh

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+#!/usr/bin/env bash
+# Copyright 2022 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Exit on command error
+set -e
+
+# Ensure image name is lowercase
+IMAGE_NAME=$(echo $IMAGE_NAME | tr '[:upper:]' '[:lower:]')
+
+echo "Generate weaver.toml"
+cat <<EOT > ./weaver.toml
+[serviceweaver]
+binary = "./collatz"
+[kube]
+image = "$IMAGE_NAME"
+listeners.collatz = {public = true}
+EOT
+
+# Ensure the binary is executable
+chmod +x ./collatz
+
+echo "Build the docker image and push"
+weaver-kube deploy weaver.toml
+
+echo "Deploy the application"
+kubectl apply -f ./kube_*.yaml
+
+echo "Wait for deployment to be ready"
+kubectl wait --for=condition=Available=True --timeout=90s Deployment \
+  -l serviceweaver/app_name=collatz
+
+# Get the load balancer name
+LOAD_BALANCER_NAME=$(kubectl get service \
+  -l serviceweaver/app_name=collatz \
+  -o=go-template \
+  --template='{{- range .items -}}{{- if eq .spec.type "LoadBalancer" -}}{{ .metadata.name }}{{- end -}}{{- end -}}')
+
+echo "Call the API and check the response"
+kubectl run -i --rm --restart=Never --image=busybox:latest test-api \
+  --command wget -- -q -O - http://$LOAD_BALANCER_NAME/\?x\=10