Container Service for Kubernetes:Schedule pods to specific nodes

Step 1: Configure node labels

1. Log on to the ACK console.
2. In the left-side navigation pane of the ACK console, click Clusters.
3. On the Clusters page, find the cluster that you want to manage and click the name of the cluster or click Details in the Actions column. The details page of the cluster appears.
4. In the left-side navigation pane of the details page, choose Nodes > Nodes.
5. On the Nodes page, click Manage Labels and Taints in the upper-right corner to go to the Manage Labels and Taints page.
6. On the Labels tab, select the nodes that you want to manage and click Add Label.
7. In the Add dialog box, specify Name and Value, and then click OK.
   • Name: the name of the label. The name can contain letters, digits, hyphens (-), underscores (_), and periods (.).The name must start and end with a letter or a digit.
   • Value: the value of the label. The value can contain letters, digits, hyphens (-), underscores (_), and periods (.).The label value must start and end with a letter or a digit. You can leave this parameter empty.

Step 2: Schedule a pod to a specific node

1. In the left-side navigation pane of the ACK console, click Clusters.
2. On the Clusters page, find the cluster that you want to manage and click the name of the cluster or click Details in the Actions column. The details page of the cluster appears.
3. In the left-side navigation pane of the details page, choose Workloads > Deployments.
4. On the Deployments page, click Create from Template in the upper-right corner.
5. Configure the template and use the template to deploy a pod.
   • Namespace: Select the namespace to which the pod belongs. In this example, the default namespace is selected.
   • Sample Template: In this example, Custom is selected.

   The following YAML template is used to deploy the pod:

    apiVersion: v1
    kind: Pod
    metadata:
      labels:
        name: hello-pod
      name: hello-pod
    spec:
      containers:
        - image: nginx
          imagePullPolicy: IfNotPresent
          name: hello-pod
          ports:
            - containerPort: 8080
              protocol: TCP
          resources: {}
          securityContext:
            capabilities: {}
            privileged: false
          terminationMessagePath: /dev/termination-log
      dnsPolicy: ClusterFirst
      restartPolicy: Always
      nodeSelector:                    
        group: worker                           ##This value must be the same as the node label that is added in Step 1. 
      status: {}

6. Click Create. A message that indicates the deployment status appears.

Verify the result

You can use one of the following methods to check whether the pod is deployed on the specified node:

Method 1: Click the pod name after the pod is deployed

1. After the pod is deployed, click the pod name in the notification at the bottom of the page to go to the Pods page.
   
2. On the Pods page, click the pod name to go to the details page of the pod.
   You can view the labels of the pod and the ID of the node to which the pod is scheduled. The following figure indicates that the pod is scheduled to the node with the group:worker label.

Method 2: Check the containers on the Pods page

1. In the left-side navigation pane of the ACK console, click Clusters.
2. On the Clusters page, find the cluster that you want to manage and click the name of the cluster or click Details in the Actions column. The details page of the cluster appears.
3. In the left-side navigation pane of the details page, choose Workloads > Pods.
4. On the Pods page, click the pod name to go to the details page of the pod.

   You can view the labels of the pod and the ID of the node to which the pod is scheduled. The following figure indicates that the pod is scheduled to the node with the group:worker label.