This topic describes how to view the basic information about clusters that belong to your Alibaba Cloud account and the details about a cluster.

Prerequisites

An E-MapReduce (EMR) cluster is created. For more information, see Create a cluster.

View the cluster list

  1. Log on to the Alibaba Cloud 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 your clusters and the operations that you can perform on 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. For more information, see Status list.
    Created At/Time Elapsed
    • Created At: the time when the cluster was created.
    • Time Elapsed: the time elapsed from the time when the cluster was created 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 The tag that is added to the cluster.
    Actions The operations that you can perform on the cluster. The following operations are included:
    • Details: View the details about the cluster on the Cluster Overview page.
    • Renewal: Renew the cluster. You can renew only subscription clusters.
    • More:
      • CloudMonitor: Enable the system to monitor CPU idleness, memory capacity, and disk capacity of the EMR cluster.
      • Auto Renewal: Enable automatic renewal for the subscription cluster.
      • Scale Out: Scale out the cluster. For more information, see Scale out a cluster.
      • Release: Release the cluster. You can release only pay-as-you-go clusters. For more information, see Release a cluster.
      • Restart: Restart the cluster.

View the details about the cluster

  1. Log on to the Alibaba Cloud 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 details about the cluster in the following sections: Cluster Info, Software Info, Network Info, and Instance Info.
    • Cluster InfoCluster 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 The status of the cluster. For more information, see Status list.
      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.
      Total number of nodes in the cluster The total number of nodes in the cluster.
      Start Time The time when the cluster was created.
      Billing Method The billing method of the cluster.
      Time Elapsed The time elapsed from the time when the cluster was created to the current time.
      Hive Metadata The metadata storage center.
      Bootstrap Actions/EMR Version The information about custom scripts and software configuration.
      ECS Role The ECS application role.

      You can assign an application role to a cluster. Then, EMR applies for a temporary AccessKey pair when applications that run on the compute nodes of the cluster access other Alibaba Cloud services, such as Object Storage Service (OSS). You do not need to manually enter an AccessKey pair. You can grant the access permissions of the application role on specific Alibaba Cloud services based on your business requirements.

      Tag The tag that is added to the cluster. For more information, see Manage and use tags.
    • Software InfoSoftware Info
      Parameter Description
      EMR Version The EMR version of the cluster.
      Cluster Type The type of the cluster.
      Software Info All the applications that are installed in the cluster and the application versions, such as HDFS 2.8.5, Hive 2.3.9, and Spark 2.4.8.
    • Network InfoNetwork Info
      Parameter Description
      Zone ID The region where the cluster resides.
      Network Type The network type of the cluster. By default, the VPC network type is selected.
      Security Group ID The ID of the security group to which the cluster is added.
      VPC/VSwitch The ID of the VPC where the cluster resides and the ID of the vSwitch to which the cluster belongs.
    • Instance InfoInstance Info
      Parameter Description
      ECS Instance Type The type of the ECS instances.
      Instances The current number of nodes in the cluster and the number of nodes that you 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 instance.
      Memory The memory capacity of a single instance.
      Data Disk Type The data disk type and data disk capacity of a single instance.
      ECS instances The information about each ECS instance in a master node group, including the following parameters:
      • ECS ID: the ID of the 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 private IP address of the ECS instance, which can be accessed by all nodes in the cluster.
      • Created At: the time when the ECS instance was created.