at http://blog.kubernetes.io/2017/03/advanced-scheduling-in-kubernetes.html an example of a custom scheduler for kubernetes is given, which is written in bash language. My question is how can such a custom scheduler be used for a pod? It says "Note that you need to run this along with kubectl proxy for it to work", which is not clear to me.
I would appreciate any help. thanks
You would need to deploy the scheduler. Then associate that scheduler to your pod.
This is a great write-up: https://kubernetes.io/docs/tasks/administer-cluster/configure-multiple-schedulers/
Here is an example deployment of my-scheduler:
apiVersion: apps/v1beta1
kind: Deployment
metadata:
labels:
component: scheduler
tier: control-plane
name: my-scheduler
namespace: kube-system
spec:
replicas: 1
template:
metadata:
labels:
component: scheduler
tier: control-plane
version: second
spec:
containers:
- command:
- /usr/local/bin/kube-scheduler
- --address=0.0.0.0
- --leader-elect=false
- --scheduler-name=my-scheduler
image: gcr.io/my-gcp-project/my-kube-scheduler:1.0
livenessProbe:
httpGet:
path: /healthz
port: 10251
initialDelaySeconds: 15
name: kube-second-scheduler
readinessProbe:
httpGet:
path: /healthz
port: 10251
resources:
requests:
cpu: '0.1'
securityContext:
privileged: false
volumeMounts: []
hostNetwork: false
hostPID: false
volumes: []Here is how to connect a pod to your scheduler:
apiVersion: v1
kind: Pod
metadata:
name: annotation-second-scheduler
labels:
name: multischeduler-example
spec:
schedulerName: my-scheduler
containers:
- name: pod-with-second-annotation-container
image: gcr.io/google_containers/pause:2.0The key part in the above are spec.schedulerName.