This topic describes how to view the general information of clusters under your Alibaba Cloud account and the details of a single cluster.

Prerequisites

A cluster is created. For more information, see Create a cluster.

View the cluster list

  1. Log on to the EMR console.
  2. In the top navigation bar, select the region where your cluster resides and select a resource group based on your business requirements.
  3. Click the Cluster Management tab.
    The Cluster Management tab displays the basic information about all of your clusters and the operations supported by each cluster.Cluster list
    Parameter Description
    Cluster ID/Name The ID and name of the cluster.
    Cluster Type The type of the cluster.
    Status The status of the cluster.
    Created At/Time Elapsed
    • Created At: the time the cluster was created.
    • Time Elapsed: the running time of the cluster from its creation to the current time. After the cluster is released, the time is no longer measured.
    Billing Method The billing method of the cluster.
    Cluster Tag Identifies the cluster.
    Actions The operations that can be performed on the cluster. The supported operations include:
    • Monitor: views the overview information about the cluster on the Cluster Overview page.
      Note EMR-APM is available only in the following regions: China (Hangzhou), China (Shanghai), China (Beijing), China (Zhangjiakou-Beijing Winter Olympics), China (Shenzhen), and US (Virginia). If you require EMR-APM in other regions, submit a ticket and contact the EMR product team.
    • Details: views detailed information about the cluster on the Cluster Overview page.
    • More:
      • CloudMonitor: monitors CPU idleness, memory capacity, and disk capacity of the EMR cluster to help users monitor the running status of the cluster.
      • Scale Out: scales out the cluster. For more information, see Scale out a cluster.
      • Release: releases the cluster. For more information, see Release a cluster.
      • Restart: restarts the cluster.

View cluster details

  1. Log on to the EMR console.
  2. In the top navigation bar, select the region where your cluster resides and select a resource group based on your business requirements.
  3. Click the Cluster Management tab.
  4. On the Cluster Management page, find your cluster and click Details in the Actions column.
    The Cluster Overview page displays detailed information about the cluster in four sections: Cluster Info, Software Info, Network Info, and Instance Info.
    • Cluster Info
      Parameter Description
      Cluster Name The name of the cluster.
      Cluster ID The ID of the cluster.
      Region The region where the cluster resides.
      Status For more information, see Status list.
      Tag The cluster tag. For more information, see Manage cluster tags.
      I/O Optimization Specifies whether I/O optimization is enabled.
      High Availability Specifies whether high availability is enabled.
      Security Mode The security mode. The software of the cluster starts in Kerberos security mode. For more information, see Introduction to Kerberos.
      Start Time The time the cluster was created.
      Billing Method The billing method of the cluster.
      Time Elapsed The running time of the cluster.
      Unified Metabases Specifies whether the unified metadatabase is enabled.
      Bootstrap Actions/EMR Version Information about custom scripts and software configuration.
      ECS Role The ECS application role.

      You can assign an application role to a cluster. This way, EMR applies for a temporary AccessKey pair when applications running on the compute nodes of the cluster access other Alibaba Cloud services, such as OSS. You do not need to manually enter an AccessKey pair. You can grant the application role access permissions on specific Alibaba Cloud services as required.

      Associated Gateway The gateway cluster that is associated with the EMR cluster.
    • Software InfoSoftware Info
      Parameter Description
      EMR Version The major version of EMR.
      Cluster Type The type of the cluster.
      Software Info All the applications installed in the cluster and their versions, such as HDFS 2.7.2, Hive 2.3.3, and Spark 2.3.1.
    • Network InfoNetwork Info
      Parameter Description
      Zone ID The ID of the zone where the cluster resides, such as cn-hangzhou-b. The value is also the ID of the zone where the ECS instance resides.
      Network Type The network type of the cluster.
      Security Group ID The ID of the security group to which you want to add your cluster.
      VPC/VSwitch The ID of the VPC to which your cluster belongs and the ID of the subnet VSwitch.
    • Instance InfoInstance Info
      Parameter Description
      Instances The current number of nodes and the number of nodes that you have requested. Theoretically, the two values must be the same. However, the current number is less than the requested number during the cluster creation process.
      CPU The number of vCPUs for a single node.
      Memory The memory capacity of a single node.
      Data Disk Type The data disk type and data disk capacity of a single node.
      ECS instances The information about ECS instances in a master node group, including:
      • ECS ID: the ID of the purchased ECS instance.
      • Deployment Status: the deployment status of the ECS instance. Valid values: Initializing, Normal, and Scaling Out.
      • Public IP Address: the public IP address of the ECS instance.
      • Internal IP Address: the internal IP address of the ECS instance, which can be accessed by all nodes in the cluster.
      • Created At: the creation time of the purchased ECS instance.