Action required: End of Support for Microsoft Azure Load Balancer property NumberOfProbes

Question

We've received a mail regarding Load balancers property NumberOfProbes will be ending support by 1 September 2027. To avoid service disruption, upgrade your apps and start using the Azure Load Balancer property ProbeThreshold before that date. 

Where can we check this property in load balancers and what steps should we take?

Answer 1

@PRASANNA KUMAR SAI SEERAPU

Thank you for reaching out.

You can check the value of the NumberOfProbes property using the Get-AzLoadBalancerProbeConfig Azure PowerShell command or use LoadBalancerProbeList Rest API

$slb = Get-AzLoadBalancer -Name "MyLoadBalancer" -ResourceGroupName "MyResourceGroup"
Get-AzLoadBalancerProbeConfig -Name "MyProbe" -LoadBalancer $slb

Regarding the required action here:

• There is a known issue about Health probe configuration property numberOfProbes, otherwise known as "Unhealthy threshold" in Portal, isn't respected.
• So, the value defined in "numberOfProbes" does not take effect.
• If you would like to have a property to control the number of successful or failed consecutive probes necessary to mark backend instances as healthy or unhealthy, please leverage the property "probeThreshold" instead. The default value for probeThreshold is set to 1
  • You should use API version 2022-05-01 or higher if you would like to adjust this property.
• Wrt "numberOfProbes" - no Action is required from the customers (as this property was never in effect).

Reference:

https://learn.microsoft.com/en-us/answers/questions/2086333/tell-me-more-about-numberofprobes-in-azure-load-ba

Hope this helps! Please let me know if you have any questions. Thank you!

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I would greatly appreciate if you could Accept the answer and close this thread

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