Kubernetes PowerShell scheduler

Inspired by bashScheduler

How to run it

Obviously not in production

Only runs on kubectl proxy api

Run nginx deployment that uses pwshScheduler

kubectl apply -f nginx-pwsh-scheduler.yml

You will see two nginx-pwsh-scheduler pods with Pending status

NAME                                    READY   STATUS    RESTARTS   AGE
nginx-pwsh-scheduler-84948c8d4f-9crz6   0/1     Pending   0          3s
nginx-pwsh-scheduler-84948c8d4f-njbhn   0/1     Pending   0          3s

Then proxy your localhost to the kubernetes api server

kubectl proxy
Starting to serve on 127.0.0.1:8001

Now in a powershell run scheduler

.\scheduler.ps1

In case you are now allowed to run scripts, modify ExecutionPolicy

Set-ExecutionPolicy -ExecutionPolicy Unrestricted

You will see that pods are scheduled to nodes

$ ./scheduler.sh
Schedule pod: nginx-pwsh-scheduler-84948c8d4f-9crz6
kind       : Status
apiVersion : v1
metadata   :
status     : Success
code       : 201

Schedule pod: nginx-pwsh-scheduler-84948c8d4f-njbhn
kind       : Status
apiVersion : v1
metadata   :
status     : Success
code       : 201

Now pods are scheduled to random nodes

NAME                                    READY   STATUS    RESTARTS   AGE
nginx-pwsh-scheduler-84948c8d4f-9crz6   1/1     Running   0          8m37s
nginx-pwsh-scheduler-84948c8d4f-njbhn   1/1     Running   0          8m37s