This is a sample project to test the development and deployment of a simple Java app to a Kubernetes cluster.
My provider of choice was DigitalOcean, because as of this writing they:
- Have a fairly feature-complete managed Kubernetes implementation (called DOKS)
- Only charging for the infra (droplets)
- Not enforcing credit cards
Run doks-create.sh. This will take ~5 mins.
Just run deploy.sh.
Note that it'll build a GraalVM native image, using ~6GB RAM in the process, and it'll take a while. In return, the resulting image is just 74MB and it's blazing fast!
DOKS creates firewall rules to expose NodePorts automatically.
You can test the service by getting the public IPs first:
doctl compute droplet list --tag-name k8s:worker --format ID,PublicIPv4
Then:
curl http://<public IP>:30080/hello
You're billed by the hour, so don't forget to drop the resources when you're done!
Run doks-destroy.sh.