Resize a cluster

The resize option allows you to add or remove cluster nodes.

Ensure that you are using a cluster that can be resized.

Required role: The DataHubAdmin or Owner roles at the scope of the Data Hub allow you to manage the Data Hub. Note that EnvironmentAdmin and Owner of the environment can also manage Data Hubs.

Unhealthy clusters can be resized, provided that the failed node is not a gateway node. If a new node fails to come up after scaling, the upscale operation will still complete successfully, and the failed nodes will be marked as "zombie" nodes. The stack is usable without these nodes, and you can clean them up manually. The "zombie" status indicates that the node provision has failed.

Log in to the CDP web interface.
Navigate to the Management Console > Data Hub Clusters
Browse to cluster details.
Click Actions and select Resize. The cluster resize dialog is displayed.
Using the +/- controls, adjust the number of nodes for a chosen host group.
note

You can only modify one host group at a time. It is not possible to resize the Cloudera Manager server host group (by default, this is the master host group).

note

Downscaling the worker host group below 3 nodes is not possible on clusters that have at least 3 worker nodes by design.

Click Yes to confirm the scale-up/scale-down.

While nodes are being added or removed, cluster status changes to “Update In Progress”. Once the operation has completed, cluster status changes back to “Running”. Messages similar to the following are written to even history:

Cluster scaled up
8/2/2019, 6:23:24 PM
Scaling up the cluster
8/2/2019, 6:14:05 PM
Stack successfully upscaled
8/2/2019, 6:14:04 PM
Mounting disks on new nodes
8/2/2019, 6:14:04 PM
Bootstrapping new nodes
8/2/2019, 6:13:48 PM
Infrastructure metadata extension finished
8/2/2019, 6:13:48 PM
Billing changed due to upscaling of cluster infrastructure
8/2/2019, 6:13:47 PM
Adding 1 new instances to the infrastructure
8/2/2019, 6:12:34 PM