Correction of Custom Networking - Automate Configuration with Availability Zone Labels

[asjarre]

Describe the problem

In step 2 of the Automate Configuration with Availability Zone Labels documentation, it recommends running this command to enable automatic configuration of the ENI config based on the AZ.

kubectl set env daemonset aws-node -n kube-system AWS_VPC_K8S_CNI_CUSTOM_NETWORK_CFG=true

I believe the command is meant to be:

kubectl set env daemonset aws-node -n kube-system ENI_CONFIG_LABEL_DEF=topology.kubernetes.io/zone

As it currently reads, the implication is that setting AWS_VPC_K8S_CNI_CUSTOM_NETWORK_CFG=true would be enough but I don't think that's true. Please correct me if I'm wrong.

References

Setting the ENI_CONFIG_LABEL_DEF is in line with the official AWS docs on custom networking.

[jicowan]

I believe you need to run both commands. The first command enables custom networking and the second command sets the ENIconfig name to the name of the availability zone.