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Azure
Nodepool stop or start delete nodes in scaleDownMode "Deallocate"
What happened: We use 2 preview features on some nodepools:
- scale down mode "deallocate" https://docs.microsoft.com/en-us/azure/aks/scale-down-mode
- nodepool stop/start https://docs.microsoft.com/en-us/azure/aks/start-stop-nodepools
When starting or stopping the nodepool, existing VMSS instances (running or deallocated) are deleted.
What you expected to happen: Stopping nodepool should deallocate running VMSS instances instead of deleting them. Starting nodepool should not affect VMSS instances and let autoscaler start existing instances or create new ones if needed.
How to reproduce it (as minimally and precisely as possible):
- Create a nodepool with scaledown mode set to "deallocate" and autoscaler (min nodes = 0) enabled.
- Run
az aks nodepool stoporaz aks nodepool start
Anything else we need to know?: Azure Support has confirmed the issue and advised to open an issue here as we're using preview features.
Environment:
- Kubernetes version (use
kubectl version): 1.21.7 - Size of cluster (how many worker nodes are in the cluster?): varies from 0 to ~5
- General description of workloads in the cluster (e.g. HTTP microservices, Java app, Ruby on Rails, machine learning, etc.): ephemeral test environnements
- Others:
Hi alk-jozog, AKS bot here :wave: Thank you for posting on the AKS Repo, I'll do my best to get a kind human from the AKS team to assist you.
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