Limitations
If you configure the cluster autoscaler, additional usage restrictions apply:
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Do not change the nodes that are in autoscaled node groups directly. All nodes within the same node group have the same capacity and labels and run the same system pods.
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Specify requests for your pods.
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If you have to prevent pods from being deleted too quickly, configure appropriate PDBs.
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Confirm that your cloud provider quota is large enough to support the maximum node pools that you configure.
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Do not run additional node group autoscalers, especially the ones offered by your cloud provider.
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The cluster autoscaler only adds nodes in autoscaled node groups if doing so would result in a schedulable pod. If the available node types cannot meet the requirements for a pod request, or if the node groups that could meet these requirements are at their maximum size, the cluster autoscaler cannot scale up. |