Azure - Get Current Status of the Load Balancer Probe

Question

We have a load balanced set in Azure for our web application, which load balances port 80 and 443 between two VMs. We have used the default tcp probe. Is there a way to get the current status of the probe for the load balancer from Azure?

I know I could just check each individual machines and do a probe myself, but I want to know if we could see what Azure sees for each machine.

Did you find a solution to this? Seems like incredibly basic and obvious functionality, but I'm having trouble finding it. — John Hargrove, Mar 09 '16 at 23:51
Sucks :-( Was hoping adding the probe to my dashboard would indicate status, and maybe it is but I can't even tell — Simon_Weaver, Apr 22 '17 at 09:57
This is a very simple yet needed feature which azure should consider adding. Especially will help with debugging problems. — Zapnologica, Sep 01 '17 at 06:33
7 years later, the UI is cluttered with many superfluous data but this basic information remains very difficult to get. Unbelievable! — Phil, Nov 14 '22 at 16:34

Shinva · Answer 1 · 2018-06-05T09:40:07.450

Well as of 2018-06-05 this feature is not available in the Azure Portal. Today you have to configure "Diagnostic Logs" for the Load Balancer. If you choose the "Storage Account" option a JSON file is created with records like below

        {
         "time": "2018-06-05T08:50:04.2266987Z",
         "systemId": "XXXXXXXX-XXXX-XXXX-XXXX-d81b04ac33df",
         "category": "LoadBalancerProbeHealthStatus",
         "resourceId": "/SUBSCRIPTIONS/XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXX/RESOURCEGROUPS/TEST-INT/PROVIDERS/MICROSOFT.NETWORK/LOADBALANCERS/TEST-LB",
         "operationName": "LoadBalancerProbeHealthStatus",
         "properties": {"publicIpAddress":"XXX.XXX.XXX.XXX","port":8080,"totalDipCount":2,"dipDownCount":0,"healthPercentage":100.000000}
    }
    ,
    {
         "time": "2018-06-05T08:50:09.2415410Z",
         "systemId": "XXXXXXXX-XXXX-XXXX-XXXX-d81b04ac33df",
         "category": "LoadBalancerProbeHealthStatus",
         "resourceId": "/SUBSCRIPTIONS/XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXX/RESOURCEGROUPS/TEST-INT/PROVIDERS/MICROSOFT.NETWORK/LOADBALANCERS/TEST-LB",
         "operationName": "LoadBalancerProbeHealthStatus",
         "properties": {"publicIpAddress":"XXX.XXX.XXX.XXX","port":8080,"totalDipCount":2,"dipDownCount":1,"healthPercentage":50.000000}
    }

"Log Analytics" suggested by Eric is not mandatory but can be used to analyze these LB logs.

Where in the storage account does this end up? Blobs? I pointed on to a storage account, but I can't find the logs... — Gert van den Berg, Oct 24 '18 at 06:50

score 3 · Answer 2 · answered Apr 28 '22 at 05:34

3

There's an easy solution for this now; not sure when it was added to Azure, but here you go:

Click on the Load Balancer from within the Azure portal
Under Monitoring, click on Insights.

You should see something like this:

Hopefully your health checks will look healthier than the ones in this image!

answered Apr 28 '22 at 05:34

Eric Hirst

1,111
15
31

1

Thank you. It doesn't appear clearly when pointing to a scale set but the information is more or less available when viewing the detailed metrics, under "Frontend & Backend Availability" then "Health Probe Status by Backend IP Address". Anyway, those charts are slow to refresh, this is very annoying and rather disappointing not to have a quick and efficient way to get the information. – Phil Nov 14 '22 at 16:22

score 1 · Answer 3 · answered Dec 15 '16 at 13:57

1

you could use 'Log Analytics' to see current status for health probe. Below has more details and step-by-step.

https://learn.microsoft.com/en-us/azure/load-balancer/load-balancer-monitor-log

answered Dec 15 '16 at 13:57

Erick Albuquerque

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1

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Thanks, but there is a lot of overhead in this approach (storage account, event hub, or log analysts). There really should be a way of querying the status of the probes directly. – Adrian May 22 '18 at 23:27

score 1 · Answer 4 · answered Oct 24 '18 at 07:22

you can check https://learn.microsoft.com/en-us/rest/api/load-balancer/loadbalancerprobes, click on GET and then Try it. It will need you to login with your Azure credentials and put the LB name, RG and Probe on LB which you want to check. fill the details and it will give you the response code if the probes are healthy or not.

Similarly you can use https://learn.microsoft.com/en-us/rest/api/load-balancer/loadbalancers/get to get all the details of a particular LB.

Azure - Get Current Status of the Load Balancer Probe

4 Answers4