AKS-23 Nodepool subnet size needs to accommodate maximum auto-scale settings

[dminkovski]

Overview/Summary

This Pull Request introduces an Azure Resource Graph (ARG) query that identifies AKS node pools with auto-scaling enabled and checks if the associated subnet's size can accommodate the configured max-nodes setting. This enhancement helps in proactively identifying misconfigurations that could prevent AKS clusters from scaling as intended.

Related Issues/Work Items

• APRL - AKS-23: Nodepool subnet size needs to accommodate maximum auto-scale settings
• 29853 - Apps - AKS - Subnet sized for autoscale max

This PR adds

1. A query to check if the subnet size is sufficient for the auto-scaling max-nodes setting in AKS node pools.
2. Improves visibility into potential AKS scaling issues due to subnet size limitations.
3. Facilitates proactive network planning and configuration for AKS clusters.

Breaking Changes

1. None expected. The query addition is non-intrusive and does not modify existing infrastructure or settings.

[Dost2010]

Hello @dminkovski ,
Thank you for contributing. Can you please add id column in ARG query. For mor information please refer to guide here

[ejhenry]

Thanks for the contribution @dminkovski! Please include a screenshot of the successful testing of the query in the PR. Please also update the summary table on the _index.md page for AKS to indicate an ARG query is available for AKS-23.

[dminkovski]

Testing Setup:
$LOCATION="westeurope"
$RESOURCE_GROUP="aks-23-rg"

1. az network vnet create --name MyVnet --resource-group $RESOURCE_GROUP --address-prefix 10.0.0.0/16 --location $LOCATION
2. az network vnet subnet create --name MySmallSubnet --resource-group $RESOURCE_GROUP --vnet-name MyVnet --address-prefix 10.0.0.0/29
3. az aks create --resource-group $RESOURCE_GROUP --name MyAKSCluster --node-count 1 --enable-cluster-autoscaler --min-count 1 --max-count 10 --network-plugin kubenet --vnet-subnet-id /path/to/MySmallSubnet --service-cidr 10.0.1.0/24 --dns-service-ip 10.0.1.10 --pod-cidr 10.0.2.0/24

Test:

[oZakari]

LGTM

[ejhenry]

LGTM