# MultipleSchedulers

In the Kubernetes we can create multiple schedulers by different way.<br>

1. Deploy additional Scheduler by using definition file (yaml)
2. Depoly as Pod  by using (pod template and scheduler config file)<br>

```yaml
# Pod Template
apiVersion: v1
kind: Pod
metadata:
  name: custom-scheduler
  namespace: kube-system
spec:
  # add this to specify scheduler name we use on Pod
  schedulerName: default-scheduler
  containers:
  - command:
    - /usr/local/bin/kube-scheduler
    - --config=/etc/kubernetes/my-scheduler/my-scheduler-config.yaml # (path to store config) 
    name: <scheduler_name>
    image: <image_scheduler>  

```

```yaml
# Scheduler Config File
apiVersion: kubescheduler.config.k8s.io/v1
kind: KubeSchedulerConfiguration
profiles:

  - schedulerName: <scheduler_name>
  # we can have multiple profile in priority which scheduler will be run 
  # depend on the condition
  - schedulerName: default-scheduler
  - schedulerName: no-scoring-scheduler
    plugins:
      preScore:
        disabled:
        - name: '*'
      score:
        disabled:
        - name: '*
 # Optional when we have multiple scheduler run on multiple master node
 # This is leader which scheduler will be run first
 leaderElection:
   leaderElect: true
   resourceNamespace: kube-system
   resourceName: lock-object-my-scheduler 
```

3. Deploy as Deployment can follow K8s Documentation

**CheatSheet command**

1. View Schedulers: `kubectl get pods -n kube-system`