add demo app code

Author: amila-ku

.github/workflows/build.yaml

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+name: Publish to ECR & Deploy to EKS
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+env:
+  ECR_REPOSITORY: demo-app
+  EKS_CLUSTER_NAME: demo-dev
+  AWS_REGION: eu-west-1
+  HTTP_PORT: '8080'
+
+jobs:
+  build:
+    name: Deployment
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Check out code
+      uses: actions/checkout@v3
+
+    - name: setup go
+      uses: actions/setup-go@v5
+      with:
+         go-version: '1.21.0'
+    
+    - name: test
+      run: |
+        go test -v -cover ./...
+
+    # - name: test in container
+    #   run: |
+    #     docker build  -t $ECR_REGISTRY/$ECR_REPOSITORY:$IMAGE_TAG --progress plain --no-cache --target run-test-stage .
+
+    # - name: Configure AWS credentials
+    #   uses: aws-actions/configure-aws-credentials@v4
+    #   with:
+    #     aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
+    #     aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+    #     aws-region: ${{env.AWS_REGION}}
+
+    # - name: Login to Amazon ECR
+    #   id: login-ecr
+    #   uses: aws-actions/amazon-ecr-login@v2
+
+    # - name: Build, tag, and push image to Amazon ECR
+    #   env:
+    #     ECR_REGISTRY: ${{ steps.login-ecr.outputs.registry }}        
+    #     IMAGE_TAG: ${{ github.run_number }}
+    #   run: |
+    #     docker build -t $ECR_REGISTRY/$ECR_REPOSITORY:$IMAGE_TAG -f Dockerfile .
+    #     docker push $ECR_REGISTRY/$ECR_REPOSITORY:$IMAGE_TAG
+
+    # - name: Update kube config
+    #   run: aws eks update-kubeconfig --name $EKS_CLUSTER_NAME --region $AWS_REGION
+
+    # - name: Deploy to EKS to DEV
+    #   env:
+    #     ECR_REGISTRY: ${{ steps.login-ecr.outputs.registry }}        
+    #     IMAGE_TAG: ${{ github.run_number }}
+    #   run: |
+    #     sed -i.bak "s|ENV|Dev|g" deploy/manifests/app-deploy.yaml
+    #     sed -i.bak "s|HTTPPORT|$HTTP_PORT|g" deploy/manifests/app-deploy.yaml
+    #     sed -i.bak "s|DOCKER_IMAGE|$ECR_REGISTRY/$ECR_REPOSITORY:$IMAGE_TAG|g" deploy/manifests/app-deploy.yaml && \
+    #     kubectl apply -f deploy/manifests/app-deploy.yaml
+    #     kubectl apply -f deploy/manifests/app-service.yaml
+    #     kubectl apply -f deploy/manifests/app-ingress.yaml
+
+    # - name: Call endpoint with curl
+    #   run: |
+    #     curl -X GET "https://example.com/hello"
+
+    # - name: Deploy to EKS to PROD
+    #   env:
+    #     ECR_REGISTRY: ${{ steps.login-ecr.outputs.registry }}        
+    #     IMAGE_TAG: ${{ github.run_number }}
+    #   run: |
+    #     sed -i.bak "s|ENV|PROD|g" deploy/manifests/app-deploy.yaml
+    #     sed -i.bak "s|HTTPPORT|$HTTP_PORT|g" deploy/manifests/app-deploy.yaml
+    #     sed -i.bak "s|DOCKER_IMAGE|$ECR_REGISTRY/$ECR_REPOSITORY:$IMAGE_TAG|g" deploy/manifests/app-deploy.yaml && \
+    #     kubectl apply -f deploy/manifests/app-deploy.yaml
+    #     kubectl apply -f deploy/manifests/app-service.yaml
+    #     kubectl apply -f deploy/manifests/app-ingress.yaml

.gitignore

@@ -0,0 +1,7 @@
+*.pdf
+deploy/
+validation/report.html
+.terraform
+.terraform.lock.hcl
+*.tfstate
+terraform.tfvars

Dockerfile

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+FROM golang:1.21 as build
+
+# Set destination for COPY
+WORKDIR /app
+
+# Download Go modules
+COPY go.mod ./
+RUN go mod download
+
+# Copy source files
+COPY *.go ./
+# Build
+RUN CGO_ENABLED=0 GOOS=linux go build -o /myapp
+
+# Run the tests in the container
+FROM build AS run-test-stage
+RUN go test -v -cover ./...
+
+# Final lean image
+FROM gcr.io/distroless/base-debian11
+COPY --from=build --chmod=764 /myapp /
+
+EXPOSE 8080/tcp
+
+CMD ["/myapp"]

go.mod

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+module github.com/DevOpsLK/demo
+
+go 1.21.0

main.go

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+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+)
+
+func helloHandler(w http.ResponseWriter, r *http.Request) {
+	fmt.Fprintln(w, "Hello! From DevOps Sri Lanka")
+}
+
+func main() {
+	port := os.Getenv("HTTP_PORT")
+	if port == "" {
+		port = "8080" // Default port if HTTP_PORT environment variable is not set
+	}
+	http.HandleFunc("/hello", helloHandler)
+	fmt.Printf("Server is running on port %s\n", port)
+	log.Fatal(http.ListenAndServe(":"+port, nil))
+}

main_test.go

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+package main
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+func TestHelloHandler(t *testing.T) {
+	// Create a request to the /hello endpoint (GET method)
+	req, err := http.NewRequest("GET", "/hello", nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Create a ResponseRecorder to record the response
+	rr := httptest.NewRecorder()
+
+	// Call the helloHandler with the request and response recorder
+	helloHandler(rr, req)
+
+	// Check the status code
+	if status := rr.Code; status != http.StatusOK {
+		t.Errorf("Handler returned wrong status code: got %v want %v", status, http.StatusOK)
+	}
+
+	// Check the response body
+	expected := "Hello! From Nitro\n"
+	if body := rr.Body.String(); body != expected {
+		t.Errorf("Handler returned unexpected body: got %v want %v", body, expected)
+	}
+}