Resizing a GKE cluster

Question

How do I increase the size of my GKE Cluster?

Answer 1

Remember the following when you increase the size of a cluster:

• New node instances are created using the same configuration as the existing instances

• New Pods may be scheduled onto the new instances

• Existing Pods are not moved onto the new instances

When you increase the size of a node pool that spans multiple zones, the new size represents the number of nodes in the node pool per zone. For example, if you have a node pool of size 2 spanning two zones, the total node count is 4. If you resize the node pool to size 4, the total node count becomes 8.

To resize a cluster's node pools, run the following command:

gcloud container clusters resize [CLUSTER_NAME] --node-pool [POOL_NAME] \ --num-nodes [NUM_NODES]

where:

• [CLUSTER_NAME] is the cluster's name.

• [POOL_NAME] is the name of the node pool to resize.

• [NUM_NODES] is the number of nodes to run in the pool.

Repeat this command for each node pool. If your cluster has only one node pool, omit the --node-pool flag.