Node Pool Management

1）Install Yurt-Manager Component

nodepool controller is integrated within Yurt-Manager component, and it needs to be installed before using NodePool, you can refer to Deploy OpenYurt for detailed operations.

2）Example of Node Pool usage

  • Create a nodepool
  1. $ cat <<EOF | kubectl apply -f -
  2. apiVersion: apps.openyurt.io/v1alpha1
  3. kind: NodePool
  4. metadata:
  5.   name: beijing
  6. spec:
  7.   type: Cloud
  8. EOF
  10. $ cat <<EOF | kubectl apply -f -
  11. apiVersion: apps.openyurt.io/v1alpha1
  12. kind: NodePool
  13. metadata:
  14.   name: hangzhou
  15. spec:
  16.   type: Edge
  17.   annotations:
  18.     apps.openyurt.io/example: test-hangzhou
  19.   labels:
  20.     apps.openyurt.io/example: test-hangzhou
  21.   taints:
  22.   - key: apps.openyurt.io/example
  23.     value: test-hangzhou
  24.     effect: NoSchedule
  25. EOF
  • Get the nodepool information
  1. $ kubectl get np 
  3. NAME       TYPE   READYNODES   NOTREADYNODES   AGE
  4. beijing    Cloud                               35s
  5. hangzhou   Edge                                28s
  • Add node to nodepool

Add a cloud node to nodepool “beijing”, you only need to label the node as below:

  1. $ kubectl label node {Your_Node_Name} apps.openyurt.io/desired-nodepool=beijing
  1. For example:
  2. $ kubectl label node master apps.openyurt.io/desired-nodepool=beijing
  4. master labeled

Similarly, you can add the edge nodes to nodepool “hangzhou”:

  1. $ kubectl label node {Your_Node_Name} apps.openyurt.io/desired-nodepool=hangzhou
  2. For example:
  3. $ kubectl label node k8s-node1 apps.openyurt.io/desired-nodepool=hangzhou
  5. k8s-node1 labeled
  7. $ kubectl label node k8s-node2 apps.openyurt.io/desired-nodepool=hangzhou
  9. k8s-node2 labeled
  • Verify whether a node is added to a nodepool:

When an edge node is added to a nodepool, all the annotations/labels of the nodepool are added to the node, together with a new label: apps.openyurt.io/nodepool

  1. $ kubectl get node {Your_Node_Name} -o yaml 
  3. For Example:
  4. $ kubectl get node k8s-node1 -o yaml
  6. apiVersion: v1
  7. kind: Node
  8. metadata:
  9.   annotations:
  10.     apps.openyurt.io/example: test-hangzhou
  11.     kubeadm.alpha.kubernetes.io/cri-socket: /var/run/dockershim.sock
  12.     node.alpha.kubernetes.io/ttl: "0"
  13.     node.beta.alibabacloud.com/autonomy: "true"
  14.     volumes.kubernetes.io/controller-managed-attach-detach: "true"
  15.   creationTimestamp: "2021-04-14T12:17:39Z"
  16.   labels:
  17.     apps.openyurt.io/desired-nodepool: hangzhou
  18.     apps.openyurt.io/example: test-hangzhou
  19.     apps.openyurt.io/nodepool: hangzhou
  20.     beta.kubernetes.io/arch: amd64
  21.     beta.kubernetes.io/os: linux
  22.     kubernetes.io/arch: amd64
  23.     kubernetes.io/hostname: k8s-node1
  24.     kubernetes.io/os: linux
  25.     openyurt.io/is-edge-worker: "true"
  26.   name: k8s-node1
  27.   resourceVersion: "1244431"
  28.   selfLink: /api/v1/nodes/k8s-node1
  29.   uid: 1323f90b-acf3-4443-a7dc-7a54c212506c
  30. spec:
  31.   podCIDR: 192.168.1.0/24
  32.   podCIDRs:
  33.   - 192.168.1.0/24
  34.   taints:
  35.   - effect: NoSchedule
  36.     key: apps.openyurt.io/example
  37.     value: test-hangzhou
  38. status:
  39. ***