This project is a working example of achieving Elasticity (in the sense of the Reactive Manifesto) using Akka Cluster and Kubernetes.
Elasticity is the ability of a system to scale its resources up and down according to the present need. We want to use just the right amount: nothing more, nothing less.
We combine custom resource metrics with logic to automatically adjust the configuration of the underlying cloud infrastructure.
An alternative example of cluster formation is in my other project CloudMatch, which uses the Akka Cluster Bootstrap - Kubernetes API module for Akka.
First, package the app localy in a Docker container:
sbt docker:publishLocal
Upload the image to your Kubernetes project:
gcloud docker -- push <your_project>:latest
From the k8s-deployment folder, start the whole thing with:
kubectl apply -f service.yaml
Now you can access nodes' logs. When done, shut down:
kubectl delete deployment akka-master
Copyright 2018 Fabio Tiriticco, Adam Sandor
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.