18-Multiple-Schedulers.md

Multiple Schedulers

• Take me to Video Tutorial

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/