The original hello project has been generated by the lagom/lagom-scala.g8 template. Kubernetes configuration has been added to show how a Lagom project can be deployed in a kubernetes cluster with Istio.
The steps to follow for deploying this project in kubernetes are:
- Have a kubernetes cluster. For test purposes you can use minikube.
$ minikube start -p hello-k8s - Install Istio in the k8s cluster.
- Create and publish the Docker container with the service. You can use your preferred method to do that, by example using the sbt docker plugin included in sbt-native-packager.
$ sbt docker:publishLocal - Deploy rbac configuration role.
$ kubectl apply -f kubernetes/discovery-role.yaml - Change the ip's for Kafka and Cassandra services and deploy them.
$ kubectl apply -f kubernetes/cassandra-service.yaml
$ kubectl apply -f kubernetes/kafka-service.yaml - Enables Istio for individual service or automatically labeling the namespace.
$ kubectl label namespace default istio-injection=enabled - Create the secrets with database and play secret.
$ kubectl create secret generic db-secret --from-literal=username=<user> --from-literal=password=<password>
$ kubectl create secret generic hello-application-secret --from-literal=secret="$(openssl rand -base64 48)" - Deploy the microservice.
$ kubectl apply -f kubernetes/hello-deployment.yaml