Update a cluster by using a template

Update a cluster

To update the number of workers in your cluster, fill in and execute the Google APIs Explorer Try this API template.

1. Request parameters:

   1. Insert your projectId.
   2. Specify the region where your cluster is located (confirm or replace "us-central1"). Your cluster's region is listed on the Managed Service for Apache Spark Clusters page in the Google Cloud console.
   3. Specify the clusterName of the existing cluster that you are updating (confirm or replace "example-cluster").
   4. updateMask: "config.worker_config.num_instances". This is the JSON PATH relative to the Cluster resource to the numInstances parameter to be updated (see the Request body instructions).

2. Request body:

   1. config.workerConfig.numInstances: ("3": the new number of workers). You can change this value to add fewer or more workers. For example, if your standard cluster has the default number of 2 workers, specifying "3" will add 1 worker; specifying "4 will add 2). A standard Managed Service for Apache Spark cluster must have at least 2 workers.

3. Click EXECUTE. The first time you run the API template, you may be asked to choose and sign into your Google account, then authorize the Google APIs Explorer to access your account. If the request is successful, the JSON response shows that cluster update is pending.

4. To confirm that the number of workers in the cluster has been updated, open the Managed Service for Apache Spark Clusters page in the Google Cloud console and view the cluster's Total worker nodes column. You may need to click REFRESH at the top of the page to view the updated value after the cluster update completes.