Host filesystem device error critical
Error stat-ing the {{ $labels.mountpoint }} filesystem
>>>
{fstype!~"^(fuse.*|tmpfs|cifs|nfs)"} == 1
The query selects any filesystem whose fstype is not one of fuse*, tmpfs, cifs, or nfs and checks the metric node_filesystem_device_error for those filesystems; if the metric equals 1 (meaning the node_exporter failed to stat the mount point), the alert fires.
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