Modifying Component Parameters

Last updated: 2020-07-10 15:09:24

    Feature Overview

    Configuration delivery is used to modify the parameter configurations in some key usage cases of various components in the EMR Console, but some components may not contain all the parameters of open-source features. If modification is needed, you can add or modify parameters for the component through the configuration management feature in the EMR Console. Added or modified parameters will be saved in the configuration file of the component, take effect after component restart, and be delivered at the node level.

    The level refers to the range of nodes to which the configurations will be delivered. Three levels are supported: cluster (default value), server, and configuration group. This document describes how to configure component parameters in the console.


    1. Log in to the EMR Console, select the target cluster in Cluster List, and click Details to enter the cluster details page.
    2. Select Cluster Service on the cluster details page and click Operation > Configuration Management in the top-right corner of the target component block. After entering the Configuration Management page, click Modify Configuration to add, modify, or delete parameters.
      • To configure all nodes that contain the selected component in the cluster, select cluster level.
      • To configure parameters of the selected component on a specific server, select server level.
      • To configure parameters of the selected component on multiple servers, you can create a configuration group and use it as the level.
    3. Click Modify Configuration and enter the new parameter value for the target parameter. If needed, you can click Recover to restore a parameter to its default value. Delete next to a parameter indicates that this parameter can be deleted. To delete a parameter, select Delete > OK.

      If the parameter you want to configure does not exist, you can click Add Configuration Item on the right to enter the "Add Parameter" page. Enter the new parameter name and value and click OK. Then, the new parameter will be displayed on the parameter page.

    4. Click Save Configuration to view the changes. You are recommended to enter a reason for change for future reference. After confirming that all values are correct, click Save and Deliver. After the configurations are successfully delivered, click Restart Component to make the parameters take effect.

      If you modify the component parameters on the Shell command line, and then modify them again in the EMR Console, the previous modifications made on the command line will be overridden.

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