rajeshmoyra / explore-akka

This project is a demo of an Akka-http and Akka-cluster running on top of Kubernetes (minikube) and with its own Docker image created by sbt-native-packager. It also includes several other examples of the Akka Classic and Typed (essential, persistence, remote, cluster, stream, HTTP, serialization (Srapy-JSON, Avro, Kryo, protobuffer)).

Exploring Akka 2.6.12 with Scala 2.12.7 and Java 8. The docker images are available at docker hub.

In action

Compile the project and verify the image created:

sbt docker:stage
sbt docker:publishLocal
docker images

Run the docker image: docker run -i felipeogutierrez/explore-akka:1.1 (don't forget the -i parameter to allow STDIN open!).

Running in k8s

minikube start --cpus 4 --memory 8192
kubectl create namespace akka

// This application is an Akka-http hello world
kubectl apply -f k8s/basics/hello-pod.yaml -n akka
kubectl port-forward hello 8001

This application is an Akka-cluster. 1 - Deploy the seed nodes:

kubectl apply -f k8s/cluster/akka-cluster-seed.yaml

Deploy the worker nodes:

kubectl apply -f k8s/cluster/akka-cluster-workers.yaml

Scale:

kubectl scale statefulset akka-seed --replicas=3

Check the logs:

kubectl get pods -A
kubectl logs -f akka-seed-0 | akka-seed-1 | akka-seed-2

Troubleshooting

• Release notes for scalatest 3.2.0
• useful commands:

sbt compile
sbt test
sbt package
sbt run
sbt clean assembly
sbt protobuf:protobufGenerate
sbt docker:stage
tree target/docker/stage
sbt docker:publishLocal
docker images
docker image rm <IMAGE_ID>