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  • I have a standard load balancer in azure, and some clients complain that they receive 503 error status code. They are accessing the load balancer service behind their local proxy server.

  • I suspect the issue is on the client side (at the proxy server level), but I would like to verify the load balancer access log, just to be extra sure.

  • Is there any way to see those logs?

  • I've enabled the logging on Activity Log -> Diagnostics settings and checked all the logs (Administrative, Security, ServiceHealth, Alert, Recommendation, Policy, Atuoscale,Resource Health), and I can see the metrics under the Storage Account -> Metrics, but I can't manage to find any access/error logs which is what I need in order to see if the client is reaching the load balancer or not.

Oliver
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catalin
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1 Answers1

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Connect your load balancer to Log Analytics. You can query your logs in there and create visualisations. It will automatically grab your diagnostic settings logs as well.

Here is the Azure documentation

54m
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  • Thanks, I already enabled it. But I can't manage to find the access.log. I need to see which IP's are hitting my load balancer. – catalin Jun 07 '21 at 13:17
  • If you really want to view detailed information you should use a reverse proxy or some sort of application gateway. Azure load balancer does not interact with the traffic at all, it's also not designed to do that. You can also add a firewall to the application gateway if you need specific filtering rules. – 54m Jun 08 '21 at 14:46