WORKSHOP: KUBERNETES FOR JAVA DEVELOPERS

How to start locally

• Clone demo application

git clone git@github.com:banadiga/workshop-kubernetes-for-java-developers-demo.git

• Build maven application

mvn clean install

• Start database (Postgresql in docker)

docker run -d --name db -e POSTGRES_DB=db -e POSTGRES_USER=user -e POSTGRES_PASSWORD=password  -p 54320:5432 postgres

• Migrate database (use flyway)

cd bookservice
flyway -url="jdbc:postgresql://localhost:54320/db"  migrate

Note: use following command to install/update on macos

brew install flyway

or

brew upgrade flyway

or user documentation https://flywaydb.org/documentation/commandline/

• Start application locally

SPRING_DATASOURCE_URL=jdbc:postgresql://localhost:54320/db java -jar target/book-service-0.0.1-SNAPSHOT.jar

TODO

Preparation to K8s

• Create dockerfile
• Create multi-stage docker file for each services
• Run service locally thru docker

Run application on k8s

• Create k8s configuration to start application on k8s
• Add readiness and liveness probes
• Add Limits (CPU & memory)
• Automatically scaling custom metrics
• Start application on k8s
• Create job to do migration
• Performance testing