I set up an alert monitor using the 'netapp.googleapis.com/volume/bytes_used' metric and it works fine to monitor my Netapp volume's size.
The problem is I unmounted the volume and my monitor did not alert. I looked at the monitor and it was still reporting data from the volume. I assume this is because the monitor talks directly to volume via the api.
Is there a way to monitor the volume directly on the VM its attached to? I looked at the disk monitors but it only sees devices such as /dev/sda1 it does not see the mounted volume.
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