Multiple btrfs-subvolumes from same partition not recognized properly in monitoring data

Global Community
1

Hi,

(Is this the right subforum for this kind of questions?)

I’m using the raw version of 2.4.0p18.

The agent is installed on my file server which has the following fstab for an HDD.

UUID=d4f0cb29-ca51-4188-aab9-3884d480e7f1 /var/samba/share1 btrfs defaults,subvol=@share1 0 0
UUID=d4f0cb29-ca51-4188-aab9-3884d480e7f1 /var/samba/share2 btrfs defaults,subvol=@share2 0 0
UUID=d4f0cb29-ca51-4188-aab9-3884d480e7f1 /var/samba/share3 btrfs defaults,subvol=@share3 0 0
UUID=d4f0cb29-ca51-4188-aab9-3884d480e7f1 /var/samba/share4 btrfs defaults,subvol=@share4 0 0

Share4 was recognized during a previous service discovery, all good.

However, I am getting the following error now:

Mount options of /var/samba/share4 –> Item not found in monitoring data

However, I do see share4 included with the same data points as e.g. share1 when checking the output of check_mk_agent.

Similar behavior for another HDD with more than two btrfs-subvolumes.

Interestingly,

  1. Two other HDD with just one respetively two subvolumes and

b) the main SSD with multiple subvolumes

Are properly included in the monitoring data.

Any ideas on what’s happening?

Thanks a lot in advance!

2

Hi,

To add to this topic: similar issue with check_mk_agent (through SSH) on a HAOS (Home Assistant) instance.

Yesterday, mount options of /homeassistant were discovered.

After a reboot tonight, I am getting the same “Item not found in monitoring data” error.

Output of df on that machine is as follows. Difference with yesterday could be (don’t fully remember though) that /homeassistant was displayed on a earlier row when invoking df).

Filesystem 1K-blocks Used Available Use% Mounted on
overlay 32284132 8687140 22246040 28% /
/dev/xvda8 32284132 8687140 22246040 28% /ssl
/dev/xvda8 32284132 8687140 22246040 28% /media
/dev/xvda8 32284132 8687140 22246040 28% /share
/dev/xvda8 32284132 8687140 22246040 28% /backup
devtmpfs 1514888 0 1514888 0% /dev
tmpfs 1512788 0 1512788 0% /dev/shm
/dev/xvda8 32284132 8687140 22246040 28% /homeassistant
/dev/xvda8 32284132 8687140 22246040 28% /addon_configs
/dev/xvda8 32284132 8687140 22246040 28% /data
/dev/xvda8 32284132 8687140 22246040 28% /addons
/dev/xvda8 32284132 8687140 22246040 28% /run/audio
tmpfs 1512788 0 1512788 0% /dev/shm
tmpfs 605116 1256 603860 0% /run/dbus
/dev/xvda8 32284132 8687140 22246040 28% /etc/asound.conf
/dev/xvda8 32284132 8687140 22246040 28% /run/cid
/dev/xvda8 32284132 8687140 22246040 28% /etc/resolv.conf
/dev/xvda8 32284132 8687140 22246040 28% /etc/hostname
/dev/xvda8 32284132 8687140 22246040 28% /etc/hosts
/dev/xvda8 32284132 8687140 22246040 28% /var/log/journal
tmpfs 605116 1256 603860 0% /run/log/journal
/dev/xvda8 32284132 8687140 22246040 28% /etc/pulse/client.conf
tmpfs 1512788 0 1512788 0% /proc/asound
devtmpfs 1514888 0 1514888 0% /proc/interrupts
devtmpfs 1514888 0 1514888 0% /proc/kcore
devtmpfs 1514888 0 1514888 0% /proc/keys
devtmpfs 1514888 0 1514888 0% /proc/timer_list
tmpfs 1512788 0 1512788 0% /proc/scsi
tmpfs 1512788 0 1512788 0% /sys/firmware

3

Output of check_mk_agent on the HAOS host:

<<<check_mk>>>
Version: 2.4.0p18
AgentOS: linux
Hostname: a0d7b954-ssh
AgentDirectory: /etc/check_mk
DataDirectory: /var/lib/check_mk_agent
SpoolDirectory: /var/lib/check_mk_agent/spool
PluginsDirectory: /usr/lib/check_mk_agent/plugins
LocalDirectory: /usr/lib/check_mk_agent/local
OSType: linux
OSName: Alpine Linux
OSPlatform: alpine
OSVersion: 3.22.2
FailedPythonReason:
SSHClient:
<<<checkmk_agent_plugins_lnx:sep(0)>>>
pluginsdir /usr/lib/check_mk_agent/plugins
localdir /usr/lib/check_mk_agent/local
<<<labels:sep(0)>>>
{"cmk/device_type":"container"}
<<<nfsmounts_v2:sep(0)>>>
<<<cifsmounts>>>
<<<mounts>>>
/dev/xvda8 /ssl ext4 rw,relatime,commit=30 0 0
/dev/xvda8 /media ext4 rw,relatime,commit=30 0 0
/dev/xvda8 /share ext4 rw,relatime,commit=30 0 0
/dev/xvda8 /backup ext4 rw,relatime,commit=30 0 0
/dev/xvda8 /homeassistant ext4 rw,relatime,commit=30 0 0
/dev/xvda8 /addon_configs ext4 rw,relatime,commit=30 0 0
/dev/xvda8 /data ext4 rw,relatime,commit=30 0 0
/dev/xvda8 /addons ext4 rw,relatime,commit=30 0 0
/dev/xvda8 /run/audio ext4 ro,relatime,commit=30 0 0
/dev/xvda8 /etc/asound.conf ext4 ro,relatime,commit=30 0 0
/dev/xvda8 /run/cid ext4 ro,relatime,commit=30 0 0
/dev/xvda8 /etc/resolv.conf ext4 rw,relatime,commit=30 0 0
/dev/xvda8 /etc/hostname ext4 rw,relatime,commit=30 0 0
/dev/xvda8 /etc/hosts ext4 rw,relatime,commit=30 0 0
/dev/xvda8 /var/log/journal ext4 ro,relatime,commit=30 0 0
/dev/xvda8 /etc/pulse/client.conf ext4 ro,relatime,commit=30 0 0
<<<ps_lnx>>>
[time]
1767352878
[processes]
[header] CGROUP USER VSZ RSS TIME ELAPSED PID COMMAND
- root 440 100 00:00:00 09:16:33 1 /package/admin/s6/command/s6-svscan -d4 -- /run/service
- root 220 80 00:00:00 09:16:32 19 s6-supervise s6-linux-init-shutdownd
- root 208 60 00:00:00 09:16:32 21 /package/admin/s6-linux-init/command/s6-linux-init-shutdownd -d3 -c /run/s6/basedir -g 3000 -C -B
- root 220 76 00:00:00 09:16:32 30 s6-supervise ttyd
- root 220 72 00:00:00 09:16:32 31 s6-supervise s6rc-fdholder
- root 220 76 00:00:00 09:16:32 32 s6-supervise sshd
- root 220 76 00:00:00 09:16:32 33 s6-supervise s6rc-oneshot-runner
- root 208 68 00:00:00 09:16:32 41 /package/admin/s6/command/s6-ipcserverd -1 -- /package/admin/s6/command/s6-ipcserver-access -v0 -E -l0 -i data/rules -- /package/admin/s6/command/s6-sudod -t 30000 -- /package/admin/s6-rc/command/s6-rc-oneshot-run -l ../.. --
- root 6704 4696 00:00:01 09:16:31 305 sshd: /usr/sbin/sshd -D -e [listener] 0 of 10-100 startups
- root 7884 2844 00:00:00 09:16:31 308 ttyd -d1 -i hassio --writable -p 64851 tmux -u new -A -s homeassistant zsh -l
- root 7168 5112 00:00:00 08:33 73224 sshd-session: hassio [priv]
- hassio 7468 4032 00:00:00 08:33 73226 sshd-session: hassio@pts/0
- root 1936 1504 00:00:00 08:32 73227 sudo -i
- root 1936 852 00:00:00 08:32 73229 sudo -i
- root 4612 4336 00:00:02 08:32 73230 -zsh
- root 3480 2836 00:00:00 00:00 75605 /bin/bash ./check_mk_agent
- root 3496 2460 00:00:00 00:00 75622 /bin/bash ./check_mk_agent
- root 3452 2388 00:00:00 00:00 75624 /bin/bash ./check_mk_agent
- root 1688 928 00:00:00 00:00 75626 cat
- root 3496 2340 00:00:00 00:00 75641 /bin/bash ./check_mk_agent
- root 2844 1908 00:00:00 00:00 75642 ps ax -ww -o cgroup:512,user:32,vsz,rss,cputime,etime,pid,command
- root 1628 844 00:00:00 00:00 75643 tr -s
<<<docker_container_mem_cgroupv2>>>
anon 8572928
file 41893888
kernel 16797696
kernel_stack 344064
pagetables 864256
sec_pagetables 0
percpu 960
sock 0
vmalloc 0
shmem 0
zswap 0
zswapped 0
file_mapped 5906432
file_dirty 4096
file_writeback 0
swapcached 0
inactive_anon 0
active_anon 8548352
inactive_file 9936896
active_file 31956992
unevictable 0
slab_reclaimable 14833896
slab_unreclaimable 519960
slab 15353856
workingset_refault_anon 0
workingset_refault_file 0
workingset_activate_anon 0
workingset_activate_file 0
workingset_restore_anon 0
workingset_restore_file 0
workingset_nodereclaim 0
pgdemote_kswapd 0
pgdemote_direct 0
pgdemote_khugepaged 0
pgscan 0
pgsteal 0
pgscan_kswapd 0
pgscan_direct 0
pgscan_khugepaged 0
pgsteal_kswapd 0
pgsteal_direct 0
pgsteal_khugepaged 0
pgfault 13460159
pgmajfault 287
pgrefill 0
pgactivate 0
pgdeactivate 0
pglazyfree 0
pglazyfreed 0
swpin_zero 0
swpout_zero 0
zswpin 0
zswpout 0
zswpwb 0
memory.current 67325952
memory.max max
MemTotal:        3025580 kB
<<<docker_container_cpu_cgroupv2>>>
uptime 33406.87 31688.80
num_cpus 1
usage_usec 110325155
user_usec 57559752
system_usec 52765403
nice_usec 4000
nr_periods 0
nr_throttled 0
throttled_usec 0
nr_bursts 0
burst_usec 0
<<<uptime>>>
33404
<<<lnx_if>>>
[start_iplink]
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host noprefixroute
       valid_lft forever preferred_lft forever
2: enX0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP qlen 1000
    link/ether 00:16:3e:f2:93:d2 brd ff:ff:ff:ff:ff:ff
    inet 192.168.200.2/24 brd 192.168.200.255 scope global dynamic noprefixroute enX0
       valid_lft 571403sec preferred_lft 571403sec
    inet6 fe80::188f:a3de:9a13:e9cc/64 scope link noprefixroute
       valid_lft forever preferred_lft forever
3: docker0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP
    link/ether 0e:2d:40:0c:28:ed brd ff:ff:ff:ff:ff:ff
    inet 172.30.232.1/23 brd 172.30.233.255 scope global docker0
       valid_lft forever preferred_lft forever
    inet6 fe80::c2d:40ff:fe0c:28ed/64 scope link
       valid_lft forever preferred_lft forever
4: hassio: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP
    link/ether 66:03:e9:e6:e3:d0 brd ff:ff:ff:ff:ff:ff
    inet 172.30.32.1/23 brd 172.30.33.255 scope global hassio
       valid_lft forever preferred_lft forever
    inet6 fe80::6403:e9ff:fee6:e3d0/64 scope link
       valid_lft forever preferred_lft forever
5: veth9f14b13@enX0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master hassio state UP
    link/ether 9e:b5:c6:4a:a6:07 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::9cb5:c6ff:fe4a:a607/64 scope link
       valid_lft forever preferred_lft forever
6: vethdccf4dd@enX0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master docker0 state UP
    link/ether 16:d4:ab:8b:3b:da brd ff:ff:ff:ff:ff:ff
    inet6 fe80::14d4:abff:fe8b:3bda/64 scope link
       valid_lft forever preferred_lft forever
7: veth1192fe3@docker0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master hassio state UP
    link/ether e2:5b:14:39:b6:5e brd ff:ff:ff:ff:ff:ff
    inet6 fe80::e05b:14ff:fe39:b65e/64 scope link
       valid_lft forever preferred_lft forever
8: veth26f9732@enX0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master hassio state UP
    link/ether c2:32:1e:ab:93:38 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::c032:1eff:feab:9338/64 scope link
       valid_lft forever preferred_lft forever
9: veth2f9876b@enX0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master hassio state UP
    link/ether 62:87:91:32:8b:21 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::6087:91ff:fe32:8b21/64 scope link
       valid_lft forever preferred_lft forever
10: veth7f10837@enX0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master hassio state UP
    link/ether ae:41:62:62:7d:a4 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::ac41:62ff:fe62:7da4/64 scope link
       valid_lft forever preferred_lft forever
11: veth6c16f62@enX0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master hassio state UP
    link/ether 9a:3a:2a:0a:3b:d0 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::983a:2aff:fe0a:3bd0/64 scope link
       valid_lft forever preferred_lft forever
12: veth0788af3@enX0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master hassio state UP
    link/ether de:79:da:c4:3c:8b brd ff:ff:ff:ff:ff:ff
    inet6 fe80::dc79:daff:fec4:3c8b/64 scope link
       valid_lft forever preferred_lft forever
13: veth027ce25@enX0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master hassio state UP
    link/ether da:66:f9:5d:82:62 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::d866:f9ff:fe5d:8262/64 scope link
       valid_lft forever preferred_lft forever
14: vethe64e8f5@enX0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master hassio state UP
    link/ether b2:25:63:a3:88:6a brd ff:ff:ff:ff:ff:ff
    inet6 fe80::b025:63ff:fea3:886a/64 scope link
       valid_lft forever preferred_lft forever
[end_iplink]
<<<lnx_if:sep(58)>>>
    lo: 2984551   12424    0    0    0     0          0         0  2984551   12424    0    0    0     0       0          0
  enX0: 680135059 1342789    0    0    0     0          0         0 118169041 1316766    0    0    0     0       0          0
docker0:  200916     917    0    0    0     0          0         0   473451     861    0    2    0     0       0          0
hassio: 67669145  289636    0    0    0     0          0         0 227576053  272916    0    2    0     0       0          0
veth9f14b13: 1661580    9177    0    0    0     0          0         0  3983615   19155    0    0    0     0       0          0
vethdccf4dd:  213754     917    0    0    0     0          0         0   476106     876    0    0    0     0       0          0
veth1192fe3: 497466963  268976    0    0    0     0          0         0 228316350  282805    0    0    0     0       0          0
veth26f9732:    2022      14    0    0    0     0          0         0  1499251   10151    0    0    0     0       0          0
veth2f9876b: 3640307   34960    0    0    0     0          0         0  4360914   34495    0    0    0     0       0          0
veth7f10837:     126       3    0    0    0     0          0         0  1495791   10141    0    0    0     0       0          0
veth6c16f62:    4258      40    0    0    0     0          0         0  1501626   10150    0    0    0     0       0          0
veth0788af3: 3791125   19915    0    0    0     0          0         0  1527561   10891    0    0    0     0       0          0
veth027ce25: 3162834   33280    0    0    0     0          0         0 433349740   42817    0    0    0     0       0          0
vethe64e8f5:    2897      28    0    0    0     0          0         0  1481946   10083    0    0    0     0       0          0
[lo]
Address: 00:00:00:00:00:00
[enX0]
Address: 00:16:3e:f2:93:d2
[docker0]
Speed: 10000Mb/s
Address: 0e:2d:40:0c:28:ed
[hassio]
Speed: 10000Mb/s
Address: 66:03:e9:e6:e3:d0
[veth027ce25]
Speed: 10000Mb/s
Address: da:66:f9:5d:82:62
[veth0788af3]
Speed: 10000Mb/s
Address: de:79:da:c4:3c:8b
[veth1192fe3]
Speed: 10000Mb/s
Address: e2:5b:14:39:b6:5e
[veth26f9732]
Speed: 10000Mb/s
Address: c2:32:1e:ab:93:38
[veth2f9876b]
Speed: 10000Mb/s
Address: 62:87:91:32:8b:21
[veth6c16f62]
Speed: 10000Mb/s
Address: 9a:3a:2a:0a:3b:d0
[veth7f10837]
Speed: 10000Mb/s
Address: ae:41:62:62:7d:a4
[veth9f14b13]
Speed: 10000Mb/s
Address: 9e:b5:c6:4a:a6:07
[vethdccf4dd]
Speed: 10000Mb/s
Address: 16:d4:ab:8b:3b:da
[vethe64e8f5]
Speed: 10000Mb/s
Address: b2:25:63:a3:88:6a
<<<tcp_conn_stats>>>
01 19
06 58
0A 17
<<<docker_container_diskstat_cgroupv2>>>
[time]
1767352878
[io.stat]
202:0 rbytes=41234432 wbytes=851968 rios=1983 wios=154 dbytes=0 dios=0
[names]
loop0 7:0
loop1 7:1
loop2 7:2
loop3 7:3
loop4 7:4
loop5 7:5
loop6 7:6
loop7 7:7
xvda 202:0
zram0 252:0
zram1 252:1
zram2 252:2
<<<md>>>
Personalities :
unused devices: <none>
<<<vbox_guest>>>