How Do I Access an MRS Cluster from a Node Outside the Cluster?

Creating a Linux ECS Outside the Cluster to Access the MRS Cluster

1. Create an ECS outside the cluster. For details, see Purchasing an ECS.

   Set AZ, VPC, and Security Group of the ECS to the same values as those of the cluster to be accessed.

2. On the VPC management console, apply for an EIP and bind it to the ECS.

   For details, see Assigning an EIP and Binding It to an ECS.

3. Configure security group rules for the cluster.
   1. On the Dashboard tab page, click Add Security Group Rule. In the Add Security Group Rule dialog box that is displayed, click Manage Security Group Rule.

      

   2. Click the Inbound Rules tab, and click Add Rule. In the Add Inbound Rule dialog box, configure the IP address of the ECS and enable all ports.

      

   3. After the security group rule is added, you can download and install the client on the ECS..
   4. Use the client.

      Log in to the client node as the client installation user and run the following command to switch to the client directory:

      cd /opt/hadoopclient

      Run the following command to load environment variables:

      source bigdata_env

      If Kerberos authentication is enabled for the cluster, run the following command to authenticate the user. If Kerberos authentication is disabled for the current cluster, authentication is not required.

      kinit MRS cluster user

      Example:

      kinit admin

      Run the client command of a component.

      Example:

      Run the following command to view files in the HDFS root directory:

      hdfs dfs -ls /

      Found 15 items
      drwxrwx--x   - hive       hive                0 2021-10-26 16:30 /apps
      drwxr-xr-x   - hdfs       hadoop              0 2021-10-18 20:54 /datasets
      drwxr-xr-x   - hdfs       hadoop              0 2021-10-18 20:54 /datastore
      drwxrwx---+  - flink      hadoop              0 2021-10-18 21:10 /flink
      drwxr-x---   - flume      hadoop              0 2021-10-18 20:54 /flume
      drwxrwx--x   - hbase      hadoop              0 2021-10-30 07:31 /hbase
      ...

Creating a Windows ECS Outside the Cluster to Access MRS Manager

Create a Windows ECS on the ECS console to access MRS Manager. For details, see Accessing MRS Manager Using a Windows ECS.