Using a Storm Client

Scenario

This section describes how to use the Storm client in an O&M scenario or service scenario.

Prerequisites

• You have installed the client. For example, the installation directory is /opt/hadoopclient.
• Service component users have been created by the MRS cluster administrator. In security mode, machine-machine users have downloaded the keytab file. A human-machine user must change the password upon the first login. (Not involved in normal mode)

Procedure

1. Prepare the client based on service requirements. Log in to the node where the client is installed.
2. Run the following command to go to the client installation directory:

   cd /opt/hadoopclient

3. Run the following command to configure environment variables:

   source bigdata_env

4. If multiple Storm instances are installed, run the following command to load the environment variables of a specific instance when running the Storm command to submit the topology. Otherwise, skip this step. The following command uses the instance Storm-2 as an example.

   source Storm-2/component_env

5. Run the following command to perform user authentication (skip this step in normal mode):

   kinit Component service user

6. Run the following command to perform operations on the client:
   For example, run the following command:

   • cql
   • storm

   

   A Storm client cannot be connected to secure and non-secure ZooKeepers at the same time.