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Multiple Schedulers

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In this section, we will take a look at multiple schedulers

Custom Schedulers

• Your kubernetes cluster can schedule multiple schedulers at the same time.

  

Deploy additional scheduler

• Download the binary

  $ wget https://storage.googleapis.com/kubernetes-release/release/v1.12.0/bin/linux/amd64/kube-scheduler
  

  

Deploy additional scheduler - kubeadm

• To create a scheduler pod

  $ kubectl create -f my-custom-scheduler.yaml
  

View Schedulers

• To list the scheduler pods

  $ kubectl get pods -n kube-system
  

Use the Custom Scheduler

• Create a pod definition file and add new section called schedulerName and specify the name of the new scheduler ``` apiVersion: v1 kind: Pod metadata: name: nginx spec: containers:
  • image: nginx name: nginx schedulerName: my-custom-scheduler ```
• To create a pod definition

  $ kubectl create -f pod-definition.yaml
  

• To list pods

  $ kubectl get pods
  

View Events

• To view events

  $ kubectl get events
  

  

View Scheduler Logs

• To view scheduler logs

  $ kubectl logs my-custom-scheduler -n kube-system
  

  

K8s Reference Docs

• https://kubernetes.io/docs/tasks/extend-kubernetes/configure-multiple-schedulers/