You are running multiple VPC-native Google Kubernetes Engine clusters in the same subnet.
The IPs available for the nodes are exhausted, and you want to ensure that the clusters can grow in nodes when needed.
What should you do?
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A. B. C. D.D.
If you are running multiple VPC-native Google Kubernetes Engine clusters in the same subnet, and the IPs available for the nodes are exhausted, there are several options you can consider to ensure that the clusters can grow in nodes when needed:
A. Create a new subnet in the same region as the subnet being used: This option involves creating a new subnet in the same region as the subnet being used by the GKE clusters. You can then configure the GKE clusters to use the new subnet, which will have its own pool of available IP addresses. This option is useful when you need to separate resources or workloads in different subnets or when you have exhausted the IP addresses available in the current subnet.
B. Add an alias IP range to the subnet used by the GKE clusters: This option involves adding an alias IP range to the existing subnet used by the GKE clusters. An alias IP range is a secondary range of IP addresses that can be used by VM instances or GKE nodes in the same subnet. By adding an alias IP range to the subnet, you can increase the number of IP addresses available for the GKE nodes. This option is useful when you want to expand the IP address range of an existing subnet.
C. Create a new VPC, and set up VPC peering with the existing VPC: This option involves creating a new VPC and setting up VPC peering with the existing VPC. VPC peering allows you to connect two VPC networks so that the resources in each network can communicate with each other using private IP addresses. By creating a new VPC, you can create a new pool of available IP addresses for the GKE clusters. This option is useful when you want to isolate resources or workloads in different VPC networks or when you have exhausted the IP addresses available in the current VPC.
D. Expand the CIDR range of the relevant subnet for the cluster: This option involves expanding the CIDR range of the relevant subnet for the GKE clusters. The CIDR range determines the range of IP addresses that are available for use in the subnet. By expanding the CIDR range, you can increase the number of IP addresses available for the GKE nodes. This option is useful when you want to expand the IP address range of an existing subnet.
In summary, you have four options to consider if you are running multiple VPC-native Google Kubernetes Engine clusters in the same subnet and the IPs available for the nodes are exhausted. The best option will depend on your specific requirements, such as the need to separate resources or workloads, expand the IP address range of an existing subnet, or isolate resources or workloads in different VPC networks.