This document describes how to add components in the EMR console.
Caution
You need to manage the components through Cluster Service. Component changes made directly by logging in to a node (such as adding a component) will not be synced to the console and thus cannot be further managed.
Components on a different EMR version or component version cannot be added. Instead, you can only add components on the current EMR version.
Directions
1. Log in to the EMR console and click the ID/Name of the target cluster in the cluster list to enter the cluster details page.
2. On the cluster details page, select Cluster Service > Add Component to add a component not installed in the cluster.
3. If there is no metadatabase in the cluster and Hue, Ranger, Oozie, Druid, and Superset components are to be installed, you need to purchase a TencentDB instance as the metadata store. You cannot add the Kudu component to a non-HA cluster.
4. There are two storage options for Hive metadata: you can store the metadata in the MetaDB (default option) or associate the metadata with EMR-MetaDB or a self-built MySQL database. In the latter case, metadata will be stored in the associated database and will not be deleted when the cluster is terminated.
5. The selection for MetaDB purchase and Hive metadatabase is the same as when you purchase a new cluster.
