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# [START vmwareengine_update_cluster_node_count]

from google.api_core import operation

from google.cloud import vmwareengine_v1

def update_cluster_node_count(

project_id: str,

zone: str,

private_cloud_name: str,

cluster_name: str,

node_count: int,

) -> operation.Operation:

"""

Modify the number of nodes in a cluster in a private cloud.

Modifying a cluster is a long-running operation and it may take over an hour.

Args:

project_id: name of the project you want to use.

zone: zone in which your private cloud is located.

private_cloud_name: name of the private cloud hosting the cluster.

cluster_name: name of the cluster.

node_count: desired number of nodes in the cluster.

Returns:

An Operation object related to cluster modification operation.

"""

if node_count < 3:

raise RuntimeError("Cluster needs to have at least 3 nodes")

client = vmwareengine_v1.VmwareEngineClient()

request = vmwareengine_v1.UpdateClusterRequest()

request.cluster = vmwareengine_v1.Cluster()

request.cluster.name = (

f"projects/{project_id}/locations/{zone}/privateClouds/{private_cloud_name}"

f"/clusters/{cluster_name}"

)

request.cluster.node_type_configs = {

"standard-72": vmwareengine_v1.NodeTypeConfig()

}

request.cluster.node_type_configs["standard-72"].node_count = node_count

request.update_mask = "nodeTypeConfigs.*.nodeCount"

return client.update_cluster(request)

# [END vmwareengine_update_cluster_node_count]