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Java CI with Maven Docker build and publish image

MirrorService

Spring Framework based Service which is mirroring requests with the option to delay requests and alter http response codes

Dependencies

At least: Java 11 and Maven 3.5

Build Service Logging

mvn package -DskipTests=true

Run with devtools

mvn spring-boot:run

Run Service

Windows

java -jar target\mirrorservice-0.3.1-SNAPSHOT.jar

Linux (service enabled)

./target/mirrorservice-0.3.1-SNAPSHOT.jar start

Docker build

docker build -t mirrorservice:latest . --build-arg JAR_FILE=./target/mirrorservice-0.3.1-SNAPSHOT.jar

Docker publish to github registry

  • docker tag mirrorservice:latest docker.pkg.github.com/wlanboy/mirrorservice/mirrorservice:latest
  • docker push docker.pkg.github.com/wlanboy/mirrorservice/mirrorservice:latest

Docker Hub

Docker Registry repro

Docker run

  • docker run --name mirrorservice -m 256M -d -p 8003:8003 -v /tmp:/tmp mirrorservice:latest

Native build

  • curl -s "https://get.sdkman.io" | bash
  • sdk install java 21.0.5-tem
  • sdk install java 21.0.2-graalce
  • export GRAALVM_HOME=~/.sdkman/candidates/java/21.0.2-graalce
  • sudo apt-get install build-essential zlib1g-dev
  • mvn -Pnative spring-boot:build-image
  • take a coffee && do a walk && docker rm mirrorservice
  • docker run --name mirrorservice -m 256M -d -p 8003:8003 -v /tmp:/tmp docker.io/library/mirrorservice:0.3.1-SNAPSHOT

Native publish

  • docker tag docker.io/library/mirrorservice:0.3.1-SNAPSHOT wlanboy/mirrorservice:latest
  • docker push wlanboy/mirrorservice:latest

Native executable

  • mvn -Pnative native:compile
  • ./target/mirrorservice
  • docker build -f Dockerfile.native -t mirrorservice:latest .
  • docker run --name mirrorservice -m 256M -d -p 8003:8003 -v /tmp:/tmp mirrorservice:latest

Kubernets deployment

Prepare

cd ~
git clone https://github.com/wlanboy/MirrorService.git

check you local kubectl

kubectl cluster-info
kubectl get pods --all-namespaces

deploy service on new namespace

cd ~/MirrorService
kubectl create namespace mirror
kubectl apply -f mirrorservice-deployment.yaml
kubectl apply -f mirrorservice-service.yaml
kubectl get pods -n mirror -o wide

check deployment and service

kubectl describe deployments -n mirror mirrorservice 
kubectl describe services -n mirror mirrorservice-service

expose service and get node port

kubectl expose deployment -n mirror mirrorservice --type=NodePort --name=mirrorservice-serviceexternal --port 8003
kubectl describe services -n mirror mirrorservice-serviceexternal

Result:

Name:                     mirrorservice-serviceexternal
Namespace:                mirror
Labels:                   app=mirrorservice
Annotations:              <none>
Selector:                 app=mirrorservice
Type:                     NodePort
IP Family Policy:         SingleStack
IP Families:              IPv4
IP:                       10.108.40.139
IPs:                      10.108.40.139
Port:                     <unset>  8003/TCP
TargetPort:               8002/TCP
NodePort:                 <unset>  30412/TCP  <--- THIS IS THE PORT WE NEED
Endpoints:                10.10.0.7:8003
Session Affinity:         None
External Traffic Policy:  Cluster
Events:                   <none>

call microservice

{"status":"UP","groups":["liveness","readiness"]}

Get your requests back

http://localhost:8003/mirror?statuscode=201&wait=1000 (1000ms)

returns http status code 201 and waits for 10 ms / mirrors body and headers

sdk command

sdk install java 21.0.5-tem
sdk install maven 3.9.9