Mount points /mnt not showing in WebUI (Netdata v2.6.1 on DietPi)

Problem/Question

Mount points located under /mnt/ are not shown in the Web UI. Other disk mount points (like / or /boot/firmware) display fine, but none of my mounted nvme or external disks under /mnt/ are visible in the disk space charts.

root@DietPi:~# sudo -u netdata cat /proc/self/mountinfo | grep /mnt
38 20 0:33 / /mnt/0fc862d1-0874-4e79-bca8-2db9d20db381 rw,relatime shared:22 - autofs systemd-1 rw,fd=48,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=1125
39 20 0:34 / /mnt/14792149-9a2e-4f55-8dce-3bc54754a6f0 rw,relatime shared:23 - autofs systemd-1 rw,fd=50,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=1128
40 20 0:35 / /mnt/271ac613-0673-4521-9ff4-7d06a6e3c42e rw,relatime shared:24 - autofs systemd-1 rw,fd=51,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=1131
41 20 0:36 / /mnt/8915ec2f-d06b-45c0-8266-021fb3465166 rw,relatime shared:25 - autofs systemd-1 rw,fd=52,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=1134
42 20 0:37 / /mnt/d7c535cc-43bb-4d36-8763-f6148088ab2e rw,relatime shared:26 - autofs systemd-1 rw,fd=53,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=1137

320 41 259:3 / /mnt/8915ec2f-d06b-45c0-8266-021fb3465166 rw,noatime shared:152 - ext4 /dev/nvme0n1p3 rw,lazytime
500 38 8:17 / /mnt/0fc862d1-0874-4e79-bca8-2db9d20db381 rw,noatime shared:364 - ext4 /dev/sdb1 rw,lazytime
851 39 8:1 / /mnt/14792149-9a2e-4f55-8dce-3bc54754a6f0 rw,noatime shared:370 - ext4 /dev/sda1 rw,lazytime
939 40 8:33 / /mnt/271ac613-0673-4521-9ff4-7d06a6e3c42e rw,noatime shared:382 - ext4 /dev/sdc1 rw,lazytime
110 42 8:49 / /mnt/d7c535cc-43bb-4d36-8763-f6148088ab2e rw,noatime shared:61 - ext4 /dev/sdd1 rw,lazytime
root@DietPi:~# ls -ald /mnt/0fc862d1-0874-4e79-bca8-2db9d20db381/
drwxr-xr-x 4 root root 4096 Apr 15  2023 /mnt/0fc862d1-0874-4e79-bca8-2db9d20db381/

root@DietPi:~# ls -ald /mnt/14792149-9a2e-4f55-8dce-3bc54754a6f0/
drwxr-xr-x 31 root root 4096 Aug  4 15:10 /mnt/14792149-9a2e-4f55-8dce-3bc54754a6f0/

root@DietPi:~# ls -ald /mnt/271ac613-0673-4521-9ff4-7d06a6e3c42e/
drwxr-xr-x 4 root root 4096 Feb 14  2024 /mnt/271ac613-0673-4521-9ff4-7d06a6e3c42e/

root@DietPi:~# ls -ald /mnt/8915ec2f-d06b-45c0-8266-021fb3465166/
drwxr-xr-x 4 root root 4096 Apr  5 19:29 /mnt/8915ec2f-d06b-45c0-8266-021fb3465166/

root@DietPi:~# ls -ald /mnt/d7c535cc-43bb-4d36-8763-f6148088ab2e/
drwxr-xr-x 6 root root 4096 Feb 14  2024 /mnt/d7c535cc-43bb-4d36-8763-f6148088ab2e/

All disks are visible in the Disks section :

Relevant docs you followed/actions you took to solve the issue

  1. Reviewed official documentation:
    :page_facing_up: https://learn.netdata.cloud/docs/collecting-metrics/linux-systems/disk-space
  2. Verified that default configuration does not exclude /mnt/.
    [plugin:proc:diskspace] section confirmed.
[plugin:proc:diskspace]
	# remove charts of unmounted disks = yes
	# update every = 1s
	# check for new mount points every = 15s
	# exclude space metrics on paths = /dev /dev/shm /proc/* /sys/* /var/run/user/* /run/lock /run/user/* /snap/* /var/lib/docker/* /var/lib/containers/storage/* /run/credentials/* /run/containerd/*  /rpool /rpool/*
	# exclude space metrics on filesystems = *gvfs *gluster* *s3fs *ipfs *davfs2 *httpfs *sshfs *gdfs *moosefs fusectl autofs cgroup cgroup2 hugetlbfs devtmpfs fuse.lxcfs
	# exclude inode metrics on filesystems = msdosfs msdos vfat overlayfs aufs* *unionfs
	# space usage for all disks = auto
	# inodes usage for all disks = auto

Environment/Browser/Agent’s version etc

  • OS: DietPi (Debian-based)

  • Netdata Agent version: v2.6.1

  • Installation type: Bare Metal

What I expected to happen

Netdata should automatically detect and display disk space metrics for /mnt/ mount points as documented in the Disk Space plugin documentation, since they are not excluded and are valid ext4 partitions.

The autofs mounts are expected to be omitted, as those are excluded with the default exclude space metrics on filesystems. However, the others should show up.

I assume you are aware that these views are scrollable, but can you verify the list of mount point labels showing in the labels drop down of the first chart below the table?

Thank you for this suggestion. I confirm that there are only:

  • /
  • /run
  • /tmp
  • /boot/firmware