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    Container Service for Kubernetes:View information about the nodes in your cluster

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    Container Service for Kubernetes:View information about the nodes in your cluster

    Last Updated:Apr 16, 2024

    Container Service for Kubernetes(ACK) allows you to view the detailed information about a node, including the name, instance ID, resources allocated to pods, resource capacity, container runtime, labels, annotations, taints, resource request, and resource usage.

    Prerequisites

    A Container Service for Kubernetes (ACK) managed cluster is created. For more information, see Create an ACK managed cluster.

    Use the CLI to view the node list

    Note

    Before you use the CLI to view the list of nodes in your cluster, you must connect to the cluster by using kubectl. For more information, see Obtain the kubeconfig file of a cluster and use kubectl to connect to the cluster.

    After you use kubectl to connect to your cluster, run the following command to view the node list: 

    kubectl get nodes

    Expected output:

    NAME                      STATUS    AGE       VERSION
iz2ze2n6ep53tch701y****   Ready     19m       v1.6.1-2+ed9e3d33a07093
iz2zeafr762wibijx39****   Ready     7m        v1.6.1-2+ed9e3d33a07093
iz2zeafr762wibijx39****   Ready     7m        v1.6.1-2+ed9e3d33a07093
iz2zef4dnn9nos8elyr****   Ready     14m       v1.6.1-2+ed9e3d33a07093
iz2zeitvvo8enoreufs****   Ready     11m       v1.6.1-2+ed9e3d33a07093

    Use the ACK console to view the node list

    1. Log on to the ACK console. In the left-side navigation pane, click Clusters.

    2. On the Clusters page, click the name of the cluster that you want to manage and choose Nodes > Nodes in the left-side navigation pane.

    3. View the node information

      • View the resource request and resource utilization of a node.

        • CPU request = sum(Amount of CPU resources requested by all pods on the node)/Total amount of CPU resources on the node

        • CPU utilization = sum(Amount of CPU resources used by all pods on the node)/Total amount of CPU resources on the node

        • Memory request = sum(Amount of memory resources requested by all pods on the node)/Total amount of memory resources on the node

        • Memory utilization = sum(Amount of memory resources used by all pods on the node)/Total amount of memory resources on the node

        Note

        • Allocatable resources = Resource capacity - Reserved resources - Eviction threshold. For more information, see Resource reservation policy.

        • You can configure resource requests for application pods based on the amount of allocatable resources. The sum of resource requests of all application pods on a node must not be greater than the amount of allocatable resources on the node. Otherwise, pod scheduling failures occur due to insufficient resources. ACK can create resource profiles for Kubernetes-native workloads to help you configure resource requests based on the historical resource usage data. For more information about how to configure resource requests for application pods, see Create a stateless application by using a Deployment.

        • If both the resource request and resource utilization of a node are 100%, the system does not schedule new pods to the node.

      • View the node name, IP address, instance ID, node pool to which the node belongs, resources allocated to pods, resource capacity, and container runtime.

      • Click More > Details in the Actions column to view the labels, annotations, taints, and pods of the node.

    References