A Elixir toy scheduler for Kubernetes. It will randomly schedule your pod in some node.
This project is just a POC to test what Kelsey taught us on this awesome talk.
Define an annotated pod with the following annotation:
scheduler.alpha.kubernetes.io/name: escheduler
In case you don't know how to do it, check the examples/ folder.
And create it:
kubectl create -f examples/pod.yml
If we now get the list of pods we will see it as pending:
kubectl get pods
NAME READY STATUS RESTARTS AGE
custom 0/1 Pending 0 44s
Now let the magic begin!
We need a kubeproxy running to avoid auth problems and have an easy setup-able local communication with our cluster:
kubectl proxy
Starting to serve on 127.0.0.1:8001
If you are not familiarized with Elixir you can take a look to mix documentation, but in a nutshell:
mix escript.build
Will generate a executable called escheduler. Let the magic happen:
./escheduler
custom pod scheduled in gke-cluster-1-default-pool-f979b5a2-oqb1
If you don't trust me you can check again:
kubectl get pods
NAME READY STATUS RESTARTS AGE
custom 1/1 Running 0 1m