For this example we are using the Digital Ocean($100 free) for managed kubernetes,
but you are free to use Google, Azure, AWS, or even minikube(local).
For the Digital Ocean we are using the simple command bash to create cluster install istio and some resources (Mysql, RabbitMQ and the Dashboard).
For that we need to expose the token to create the cluster via api. Please generate the token into the web console of Digital Ocean: https://cloud.digitalocean.com/account/api/tokens
And now just export it in an environment variable export DO_TOKEN={your_digital_ocean_token}
Run the command ./bin/create-cluster.sh (the command will create a cluster with 3 nodes with 1vcpu and 2gb of memory).
It takes some minutes, usually 3 or 5 minutes to prepare everything for you, grab a ☕
The finally move the file of kubernetes config the output of script says to you, e.g:
mv /tmp/kubernetes-file.conf ~/.kube/config
Access by proxy: kubectl proxy
It create a proxy of your cluster, that way you can access by the URL: http://localhost:8001/api/v1/namespaces/kube-system/services/https:kubernetes-dashboard:/proxy/
For the authenticate you need create the token, run the command: ./dashboard/get-token.sh and copy the token output and use for login.
There 2 demo applications to deploy and tests
- Client https://github.com/felipegirotti/spring-boot-event-driven-client-producer
- Place https://github.com/felipegirotti/spring-boot-event-driven-producer
To deploy the demo apps it's simple:
kubectl apply -f ./app/client -f ./app/place
To see the public url kubectl get svc -l app=istio-ingressgateway -n istio-system
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
istio-ingressgateway LoadBalancer 10.245.11.222 104.248.111.9 15020:30682/TCP,80:31380/TCP,443:31390/TCP,31400:31400/TCP,15029:30482/TCP,15030:31907/TCP,15031:31941/TCP,15032:31102/TCP,15443:31835/TCP 2m
The EXTERNAL-IP is your url
Add place: curl -X POST -H "Content-Type: application/json" -d '{"client_id": 1, "name": "Test", "latitude": 10.22, "longitude": -12.223}' http://104.248.111.9/api/v1/place
Get place: curl http://104.248.111.9/api/v1/place/1
Add Client: curl -X POST -H "Content-Type: application/json" -d '{"name": "Client Test", "latitude": 10.22, "longitude": -12.223}' http://104.248.111.9/api/v1/client
List Clients: curl http://104.248.111.9/api/v1/clients
To see the RabbitMQ run the command:
kubectl port-forward rabbitmq-0 15673:15672
Access locally: http:localhost:15673
User: root
Pass: root
To access mysql locally:
kubectl port-forward svc/mysql 3307:3306
Access locally: mysql -h 127.0.0.1 -u root --port=3307 -p
Pass: root
🎉 Enjoy!