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Languages & Build

Maven

Java project build automation and dependency management

🐧 Linux🍎 Mac🪟 Windows
Reviewed: Tested on: Kubernetes 1.29 · Terraform 1.8 · Ubuntu 22.04

What is this?

Maven builds Java projects — compiles code, downloads libraries, and packages apps for deployment.

📥

Step 01

Install Maven

(01)Install

Linux
1sudo apt-get install -y maven
2# Or SDKMAN:
3curl -s "https://get.sdkman.io" | bash && sdk install maven
✅

Step 02

Verify

(01)Version

Linux
1mvn -version
⚡

Step 03

Manage Maven Projects

(01)Build lifecycle

Linux
1mvn clean install       # compile, test, package
2mvn clean package -DskipTests
3mvn spring-boot:run     # run Spring Boot
4mvn dependency:tree     # show dependencies

📋Config templates

1 YAML template for Maven. Copy and deploy after setup.

1 ready-to-copy template. Expand one, copy the YAML, then run the deploy commands.

service-a-deployment.yml

yaml
1apiVersion: apps/v1
2kind: Deployment
3metadata:
4  name: service-a
5spec:
6  replicas: 1
7  selector:
8    matchLabels:
9      app: service-a
10  template:
11    metadata:
12      labels:
13        app: service-a
14    spec:
15      containers:
16        - name: service-a
17          image: spring-api-a:local
18          imagePullPolicy: IfNotPresent
19          ports:
20            - containerPort: 8080
21          resources:
22            requests:
23              memory: "256Mi"
24              cpu: "250m"
25            limits:
26              memory: "512Mi"
27              cpu: "500m"

service-a-svc.yml

yaml
1apiVersion: v1
2kind: Service
3metadata:
4  name: service-a
5spec:
6  type: ClusterIP
7  selector:
8    app: service-a
9  ports:
10    - port: 8080
11      targetPort: 8080

service-b-deployment.yml

yaml
1apiVersion: apps/v1
2kind: Deployment
3metadata:
4  name: service-b
5spec:
6  replicas: 1
7  selector:
8    matchLabels:
9      app: service-b
10  template:
11    metadata:
12      labels:
13        app: service-b
14    spec:
15      containers:
16        - name: service-b
17          image: spring-api-b:local
18          imagePullPolicy: IfNotPresent
19          ports:
20            - containerPort: 8080
21          env:
22            - name: SERVICE_A_URL
23              value: "http://service-a:8080"
24          resources:
25            requests:
26              memory: "256Mi"
27              cpu: "250m"
28            limits:
29              memory: "512Mi"
30              cpu: "500m"

service-b-svc.yml

yaml
1apiVersion: v1
2kind: Service
3metadata:
4  name: service-b
5spec:
6  type: NodePort
7  selector:
8    app: service-b
9  ports:
10    - port: 8080
11      targetPort: 8080
12      nodePort: 32080
📄

Step 01

Deploy Spring Microservices

(01)Build and load images

Linux
1# Build Spring JARs, then Docker images
2docker build -t spring-api-a:local ./service-a
3docker build -t spring-api-b:local ./service-b
4minikube image load spring-api-a:local
5minikube image load spring-api-b:local

(02)Apply all manifests

Linux
1kubectl apply -f service-a-deployment.yml
2kubectl apply -f service-a-svc.yml
3kubectl apply -f service-b-deployment.yml
4kubectl apply -f service-b-svc.yml
5kubectl get pods,svc