Issues with automatic instance repair in scale set

Question

Issues with automatic instance repair in scale set

Kameksha Kumar 1

VM scale sets is not terminating old vm once old vm become unhealthy in timely manner.it's taking upto 10 minutes.
But at previous few week ago it terminated and created a new vm in 3 minutes.

Prrudram-MSFT 28,506 Reputation points Moderator

2022-03-28T18:48:05.51+00:00

Hello @Kameksha Kumar ,

Thank you for reaching out to the Microsoft Q&A platform.

If the terminate notification feature is enabled on a scale set, then during automatic repair operation, the deletion of an unhealthy instance follows the terminate notification configuration. A terminate notification is sent through Azure metadata service – scheduled events – and instance deletion is delayed for the duration of the configured delay timeout. However, the creation of a new instance to replace the unhealthy one does not wait for the delay timeout to complete.

You might want to check the terminate notification delay timeout that was set for Instance termination.

https://learn.microsoft.com/en-us/azure/virtual-machine-scale-sets/virtual-machine-scale-sets-terminate-notification#enable-terminate-notifications