Ability to define a subnet for pods?

[spaceiq-vk]

Version

❯ helm ls -A --all -o json | jq '.[] | select(.name=="karpenter") | .app_version' -r
0.5.0

❯ kubectl version | grep Server
Server Version: v1.28.5

Expected Behavior

The pods on the nodes should be able to get the IP.

Actual Behavior

Karpenter can spin up a new node and register it to the cluster but pods are unable to get the IP.

Steps to Reproduce the Problem

• Create an AKS cluster with a different subnet for host and pods
• The resource groups of vNet and AKS are also different
• Follow the README and deploy the application

Resource Specs and Logs

All the pods that land on the node spun up by Karpenter throw this error. I think, I need a way to define the subnet ID for Pods, maybe an environment variable POD_SUBNET_ID?

plugin type="azure-vnet" failed (add): IPAM Invoker Add failed with error: Failed to allocate pool: Failed to delegate: Failed to allocate address: No available addresses

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[bwodecki-lf]

Hi,
Are you using Azure CNI Pod Subnet network configuration?
I'm facing the same issue with karpenter nodes. I have separate subnets for nodes and pods. But does karpender not support such a configuration or I'm wrong?

[Bryce-Soghigian]

Karpenter does not yet support pod subnet.

[spaceiq-vk]

Are you using Azure CNI Pod Subnet network configuration?

I am using Cilium.