Aditional Disks not shown in disk array (VirtIO)

[Flexusma]

Hi,
we recently started using checkmate to monitor some of our infrastructure (vms using virtIO Block disks).

We have a node with the following disk configuration (df-h):

root@xxx:~# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/vda1        27G  2.8G   24G  11% /
/dev/vda16      881M  112M  708M  14% /boot
/dev/vda15      105M  6.1M   99M   6% /boot/efi
/dev/vdb         49G   44K   47G   1% /data

the metrics endpoint is returning the following disk data:

    "disk": [
      {
        "device": "/dev/vda1",
        "total_bytes": 28523593728,
        "free_bytes": 25510543360,
        "usage_percent": 0.1051
      }
    ],

Is there currently a way to set the disks to monitor? Or a way to get all physical disks (sdx/vdx)?

We are interested in monitoring the 2nd disk (vdb) instead of vda (or both disks if possible).
I'm not that familiar with go, but if this is not currently implemented, I'd try and implement it myself

[mertssmnoglu]

Hello @Flexusma
Thank you for mentioning this. Since virtual machines can be very diverse, cases like this may be difficult to identify. Since we have applied 2 different filters to the partitions, you may have encountered this problem.

Second custom filter can cover the first one, so we can disable the first filter and this will solve your problem.

capture/internal/metric/disk.go

Lines 23 to 25 in 2f8f3f9

	// Set all flag to "false" to get only necessary partitions
	// Avoiding unnecessary partitions like /run/user/1000, /run/credentials
	partitions, partErr := disk.Partitions(false)

capture/internal/metric/disk.go

Lines 38 to 40 in 2f8f3f9

	if slices.Contains(checkedSlice, p.Device) || !strings.HasPrefix(p.Device, "/dev") || strings.HasPrefix(p.Device, "/dev/loop") {
	continue
	}

If you have a chance to build and test the Capture locally, can you tell us if there is still a problem after the changes.

[mertssmnoglu]

Hi @Flexusma

Capture v1.0.1 has been released and contains a fix for your issue.
If you still can't see all your virtual disks, please let me know.