suhridgupta/K8s-Custom-Scheduler

Tutorial for creating a custom Kubernetes scheduler. The scheduler is written in Python and schedules pods to a random node.

K8s-Custom-Scheduler

Tutorial for creating a custom Kubernetes scheduler. The scheduler is written in Python and schedules pods to a random node.

Set up custom scheduler

Prerequisites

• Kubeadm and Docker installed
• Kubernetes cluster with 1+ node running
• Kubernetes metrics-server installed and running

Commands

kubectl apply -f rbac.yaml
kubectl apply -f deployment.yaml

Use custom scheduler in deployment

Commands

kubectl apply -f Examples/deployment.yaml
kubectl apply -f Examples/autoscaling.yaml
bash Examples/load_generator.sh

View autoscaler details

To view the HPA metrics:

kubectl get hpa

To view the custom scheduler logs:

kubectl logs deployment/custom-scheduler --namespace=kube-system | grep Custom-Scheduler

Modify custom scheduler

• Make changes to custom-scheduler.py
• Build docker container and push to repository
• Modify the image value in custom-scheduler deployment using kubectl edit