gke extending subnet for a

We can extended subnet if we running out of ip address in a GKE cluster. To do that first we need to create an extended subnet by using the following command



gcloud compute networks subnets create research-extended \
  --network=research-aue1-vpc \
  --region=australia-southeast1 \
  --range=10.20.0.0/20 \
  --secondary-range=pods=10.100.0.0/16


Next, we will describe the GKE cluster and list down the subnet that it is currently using 


gcloud container clusters describe autopilot-cluster-1 \
  --location=australia-southeast1 \
  --format="yaml(networkConfig, ipAllocationPolicy)"


Afte that we will attached the new subnet to our GKE cluster here by running the following command


  gcloud container clusters update autopilot-cluster-1 \
  --location=australia-southeast1 \
  --additional-ip-ranges=subnetwork=research-extended,pod-ipv4-range=pods


And in the console, you can see that we have additional multi-subnet support.


The max number of subnet is 9 that can be attached to a cluster. 







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