core-deployments/node-labeler/node-labeler.yaml

apiVersion: v1
kind: Namespace
metadata:
  name: node-labeler
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: labeler-script
  namespace: node-labeler
data:
  run.sh: |
    #!/usr/bin/env sh
    while true; do
      kubectl get node $1 -o=jsonpath='{.metadata.labels}' | grep -q node-role.kubernetes.io/worker || kubectl label node $1 node-role.kubernetes.io/worker=
      kubectl get node $1 -o=jsonpath='{.metadata.labels}' | grep -q node.longhorn.io/create-default-disk || kubectl label node $1 node.longhorn.io/create-default-disk='config'
      kubectl get node $1 -o=jsonpath='{.metadata.annotations}' | grep -q node.longhorn.io/default-disks-config || kubectl annotate node $1 node.longhorn.io/default-disks-config='[ { "path":"/storage1", "allowScheduling":true }, { "name":"storage2", "path":"/storage2", "allowScheduling":true, "storageReserved":0 }]'
      sleep 60
    done
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: worker-node-labeler
  namespace: node-labeler
spec:
  selector:
    matchLabels:
      role: worker-node-labeler
  template:
    metadata:
      labels:
        role: worker-node-labeler
    spec:
      tolerations:
        - key: node-role.kubernetes.io/master
          operator: Exists
          effect: NoSchedule
      volumes:
        - name: labeler-script
          configMap:
            name: labeler-script
            defaultMode: 0777
      containers:
        - name: labeler
          image: bitnami/kubectl
          env:
            - name: NODE_NAME
              valueFrom:
                fieldRef:
                  fieldPath: spec.nodeName
          command: ["/bin/sh", "-c", "/labeler-script/run.sh $(NODE_NAME)"]
          imagePullPolicy: IfNotPresent
          volumeMounts:
            - mountPath: /labeler-script
              name: labeler-script
      restartPolicy: Always
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: worker-node-labeler-role
  namespace: node-labeler
rules:
  - apiGroups: [""]
    resources: ["nodes"]
    verbs: ["get", "patch", "list"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: worker-node-labeler-binding
  namespace: node-labeler
subjects:
  - kind: ServiceAccount
    name: default
    namespace: node-labeler
roleRef:
  kind: ClusterRole
  name: worker-node-labeler-role
  apiGroup: rbac.authorization.k8s.io