Add green deployment

Dockerfile

@@ -0,0 +1,39 @@
+# Start from the latest golang base image
+FROM golang:latest as builder
+
+# Add Maintainer Info
+LABEL maintainer="Jan"
+
+# Set the Current Working Directory inside the container
+WORKDIR /app
+
+# Copy go mod and sum files
+COPY go.mod go.sum ./
+
+# Download all dependencies. Dependencies will be cached if the go.mod and go.sum files are not changed
+RUN go mod download
+
+# Copy the source from the current directory to the Working Directory inside the container
+COPY . .
+
+# Build the Go app
+RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o main .
+
+
+######## Start a new stage from scratch #######
+FROM alpine:latest  
+
+RUN apk --no-cache add ca-certificates
+
+WORKDIR /root/
+
+# Copy the Pre-built binary file from the previous stage
+COPY --from=builder /app/main .
+
+# Expose port 8080 to the outside world
+EXPOSE 8080
+
+# Command to run the executable
+CMD ["./main"] 
+
+

SOLUTION.md

@@ -0,0 +1,5 @@
+This document decribes a blue-green deployment using a simple Go web app and Minikube.
+
+To get started, you will need to:
+- Install minikube
+- Execute `minikube start` to start the cluster

kubernetes/deployment-blue.yaml

@@ -0,0 +1,21 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: vehicles-blue
+spec:
+  replicas: 3
+  selector:
+    matchLabels:
+      app: vehicles
+  template:
+    metadata:
+      labels:
+        app: vehicles
+        version: "1.0"
+    spec:
+      containers:
+        - name: vehicles
+          image: git.bngrs.net/jan/devops-release:1.0
+          ports:
+            - name: http
+              containerPort: 8080

kubernetes/deployment-green.yaml

@@ -0,0 +1,21 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: vehicles-green
+spec:
+  replicas: 3
+  selector:
+    matchLabels:
+      app: vehicles
+  template:
+    metadata:
+      labels:
+        app: vehicles
+        version: "1.1"
+    spec:
+      containers:
+        - name: vehicles
+          image: git.bngrs.net/jan/devops-release:1.1
+          ports:
+            - name: http
+              containerPort: 8080

kubernetes/service.yaml

@@ -0,0 +1,14 @@
+---
+apiVersion: v1
+kind: Service                    # Type of kubernetes resource
+metadata:
+  name: vehicles-service
+spec:
+  type: NodePort                 # A port is opened on each node in your cluster via Kube proxy.
+  ports:                         # Take incoming HTTP requests on port 9090 and forward them to the targetPort of 8080
+  - name: http
+    port: 8080
+    targetPort: 8080
+  selector:
+    app: vehicles
+

main.go

@@ -18,6 +18,7 @@ var vehicles = []Vehicle{
 	{ID: "3", Model: "Fiat 500e", Maker: "Fiat"},
 	{ID: "4", Model: "Peugeot e-208", Maker: "Peugeot"},
 	{ID: "5", Model: "Volkswagen ID.4", Maker: "Volkswagen"},
+	{ID: "6", Model: "iX1", Maker: "BMW"},
 }
 
 func setupRouter() *gin.Engine {
@@ -31,7 +32,7 @@ func setupRouter() *gin.Engine {
 
 func main() {
 	router := setupRouter()
-	router.Run("localhost:8080")
+	router.Run("0.0.0.0:8080")
 }
 
 func getHealthz(c *gin.Context) {