setup individual disk drive low free space alert on subscription level
The existing Metrics function only can trigger alert when overall disk drive space is low, but cannot monitoring and trigger alert when disk space running out when occurred in single drive space.
Classic alert can do the individual drive monitoring but needed to re-config & setup it "per drive" on each machine repeatedly & hard to manage, it cannot do that by subscription or resource group level for bulk management.
So would like to have this missing function "drive level free space monitoring" on Metrics.
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This is currently possible. In the diagnostic setting configuration, if you chose the performance counter configuration using wildcard, you will be able to see disk drive as the instance dimension. See https://docs.microsoft.com/en-us/azure/azure-monitor/platform/diagnostics-extension-overview#data-storage for more details on this.
Suresh Pagidipati commented
I agree, when migrating from classic alerts it was easy to use custom perf counters to solve the issue which is still length procedure, now metric alerts doesn't provide any such feature.