Extender User Guide

Install volcano

1. Install from source

Refer to Install Guide to install volcano.

2. Deploy extender

Deploy extender into kubernetes cluster. Extender needs to expose domain name or IP address and verbs that can be provided.

3. Update Volcano configuration

kubectl edit cm -n volcano-system volcano-scheduler-configmap

Users can view the meaning of the parameters through the documentation

kind: ConfigMap
apiVersion: v1
metadata:
  name: volcano-scheduler-configmap
  namespace: volcano-system
data:
  volcano-scheduler.conf: |
    actions: "reclaim, allocate, backfill, preempt"
    tiers:
    - plugins:
      - name: priority
      - name: gang
      - name: conformance
    - plugins:
      - name: drf
      - name: predicates
      - name: extender
        arguments:
          extender.urlPrefix: http://127.0.0.1:8713
          extender.httpTimeout: 100ms
          extender.onSessionOpenVerb: onSessionOpen
          extender.onSessionCloseVerb: onSessionClose
          extender.predicateVerb: predicate
          extender.prioritizeVerb: prioritize
          extender.preemptableVerb: preemptable
          extender.reclaimableVerb: reclaimable
          extender.queueOverusedVerb: queueOverused
          extender.jobEnqueueableVerb: jobEnqueueable
          extender.ignorable: true

Verify Extender is working

The user can see in the log something like : ‘Initialize extender plugin with configuration : {your configuration}’