WIP: TPU Provisioner: Node pool hash comparison #967
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SidneyShen
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Feb 6, 2025
SidneyShen
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Feb 11, 2025
| func nodePoolSelectiveHash(np *containerv1beta1.NodePool) (string, error) { | ||
| h := fnv.New32a() | ||
| npToHash := &containerv1beta1.NodePool{ | ||
| Config: &containerv1beta1.NodeConfig{ |
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Didn't include ReservationAffinity: reservation, that means there will be no case of flipping between reservation and on-demand (at least in the near term), which are treated as same tier today.
SidneyShen
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Feb 11, 2025
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Updated to include an interface for interacting with GKE NodePool API in order to add some tests. |
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Issue:
Today the provisioner just checks if a node pool with the expected name exists for a given workload. If the workload is quickly recreated with a different node selector it is possible that the provisioner will not delete the old node pool in time and it will not think it needs to create a new one since the old one exists.
Fix:
This PR introduces new logic into the provisioner to check that the existing node pool matches the desired node pool via a hash comparison. Hash is calculated at node pool creation time and stored as a node pool label for later comparison.