Issues with multiple mount points for same partition? Getting "Mount options XYZ: Item not found in monitoring data"

CMK version: 2.4.0p18 raw
OS version: running in Docker

Error message: Mount options of XYZ –> Item not found in monitoring data

Applies both to ultiple btrfs-subvolumes on a single partition (on host1) but also to various mounts of same ext4 partition (on host2)

Output of “cmk --debug -vvn hostname” on host1:

value store: loading from disk
Checkmk version 2.4.0p18
+ FETCHING DATA
  Source: SourceInfo(hostname='host1', ipaddress='192.168.x.y', ident='agent', fetcher_type=<FetcherType.TCP: 8>, source_type=<SourceType.HOST: 1>)
[cpu_tracking] Start [7f870ccdb5f0]
Read from cache: AgentFileCache(path_template=/omd/sites/cmk/tmp/check_mk/cache/host1, max_age=MaxAge(checking=0, discovery=90.0, inventory=90.0), simulation=False, use_only_cache=False, file_cache_mode=6)
Not using cache (Too old. Age is 1 sec, allowed is 0 sec)
Connecting via TCP to 192.168.x.y:6556 (5.0s timeout)
Detected transport protocol: TransportProtocol.TLS
Reading data from agent via TLS socket
Reading data from agent
Detected transport protocol: TransportProtocol.PLAIN
Closing TCP connection to 192.168.x.y:6556
Write data to cache file /omd/sites/cmk/tmp/check_mk/cache/host1
Trying to acquire lock on /omd/sites/cmk/tmp/check_mk/cache/host1
Got lock on /omd/sites/cmk/tmp/check_mk/cache/host1
Releasing lock on /omd/sites/cmk/tmp/check_mk/cache/host1
Released lock on /omd/sites/cmk/tmp/check_mk/cache/host1
[cpu_tracking] Stop [7f870ccdb5f0 - Snapshot(process=posix.times_result(user=0.020000000000000018, system=0.0, children_user=0.0, children_system=0.0, elapsed=3.75))]
  Source: SourceInfo(hostname='host1', ipaddress='192.168.x.y', ident='piggyback', fetcher_type=<FetcherType.PIGGYBACK: 4>, source_type=<SourceType.HOST: 1>)
[cpu_tracking] Start [7f870cf951c0]
Read from cache: NoCache(path_template=/dev/null, max_age=MaxAge(checking=0.0, discovery=0.0, inventory=0.0), simulation=False, use_only_cache=False, file_cache_mode=1)
0 piggyback files for 'host1'.
0 piggyback files for '192.168.x.y'.
Get piggybacked data
[cpu_tracking] Stop [7f870cf951c0 - Snapshot(process=posix.times_result(user=0.0, system=0.0, children_user=0.0, children_system=0.0, elapsed=0.0))]
[cpu_tracking] Start [7f870d3d08c0]
+ PARSE FETCHER RESULTS
<<<check_mk>>> / Transition NOOPParser -> HostSectionParser
<<<cmk_agent_ctl_status:sep(0)>>> / Transition HostSectionParser -> HostSectionParser
<<<checkmk_agent_plugins_lnx:sep(0)>>> / Transition HostSectionParser -> HostSectionParser
<<<labels:sep(0)>>> / Transition HostSectionParser -> HostSectionParser
<<<df_v2>>> / Transition HostSectionParser -> HostSectionParser
<<<df_v2>>> / Transition HostSectionParser -> HostSectionParser
<<<systemd_units>>> / Transition HostSectionParser -> HostSectionParser
<<<nfsmounts_v2:sep(0)>>> / Transition HostSectionParser -> HostSectionParser
<<<cifsmounts>>> / Transition HostSectionParser -> HostSectionParser
<<<mounts>>> / Transition HostSectionParser -> HostSectionParser
<<<ps_lnx>>> / Transition HostSectionParser -> HostSectionParser
<<<mem>>> / Transition HostSectionParser -> HostSectionParser
<<<cpu>>> / Transition HostSectionParser -> HostSectionParser
<<<uptime>>> / Transition HostSectionParser -> HostSectionParser
<<<lnx_if>>> / Transition HostSectionParser -> HostSectionParser
<<<lnx_if:sep(58)>>> / Transition HostSectionParser -> HostSectionParser
<<<tcp_conn_stats>>> / Transition HostSectionParser -> HostSectionParser
<<<diskstat>>> / Transition HostSectionParser -> HostSectionParser
<<<kernel>>> / Transition HostSectionParser -> HostSectionParser
<<<md>>> / Transition HostSectionParser -> HostSectionParser
<<<vbox_guest>>> / Transition HostSectionParser -> HostSectionParser
<<<nullmailer_mailq>>> / Transition HostSectionParser -> HostSectionParser
<<<job>>> / Transition HostSectionParser -> HostSectionParser
<<<ntp:cached(1767887580,120)>>> / Transition HostSectionParser -> HostSectionParser
<<<local:sep(0)>>> / Transition HostSectionParser -> HostSectionParser
<<<docker_node_info:sep(124)>>> / Transition HostSectionParser -> HostSectionParser
<<<docker_node_info:sep(0)>>> / Transition HostSectionParser -> HostSectionParser
<<<docker_node_images:sep(124)>>> / Transition HostSectionParser -> HostSectionParser
<<<docker_node_images:sep(0)>>> / Transition HostSectionParser -> HostSectionParser
<<<docker_node_network:sep(124)>>> / Transition HostSectionParser -> HostSectionParser
<<<docker_node_network:sep(0)>>> / Transition HostSectionParser -> HostSectionParser
(... Docker piggyback data)
Transition PiggybackSectionParser -> NOOPParser
<<<smart_posix_all:sep(0)>>> / Transition NOOPParser -> HostSectionParser
<<<smart_posix_scan_arg:sep(0)>>> / Transition HostSectionParser -> HostSectionParser
  HostKey(hostname='host1', source_type=<SourceType.HOST: 1>)  -> Add sections: ['check_mk', 'checkmk_agent_plugins_lnx', 'cifsmounts', 'cmk_agent_ctl_status', 'cpu', 'df_v2', 'diskstat', 'docker_node_images', 'docker_node_info', 'docker_node_network', 'job', 'kernel', 'labels', 'lnx_if', 'local', 'md', 'mem', 'mounts', 'nfsmounts_v2', 'ntp', 'nullmailer_mailq', 'ps_lnx', 'smart_posix_all', 'smart_posix_scan_arg', 'systemd_units', 'tcp_conn_stats', 'uptime', 'vbox_guest']
  HostKey(hostname='host1', source_type=<SourceType.HOST: 1>)  -> Add sections: []
Received piggyback data for 17 hosts
Storing piggyback data for: (docker containers)
CPU load             15 min load: 0.91, 15 min load per core: 0.30 (3 cores)
CPU utilization      Total CPU: 52.60%
Check_MK Agent       Version: 2.4.0p18, OS: linux, Agent plug-ins: 2, Local checks: 0
Disk IO SUMMARY      Read: 819 B/s, Write: 298 kB/s, Latency: 13 microseconds
Docker containers    Containers: 17, Running: 17, Paused: 0, Stopped: 0
Docker node info     Daemon running on host host1
Filesystem /boot/efi Used: 4.19% - 40.8 MiB of 974 MiB, trend per 1 day 0 hours: +0 B, trend per 1 day 0 hours: +0%
Filesystem /sys/firmware/efi/efivars Used: 50.00% - 64.0 KiB of 128 KiB, trend per 1 day 0 hours: +0 B, trend per 1 day 0 hours: +0%
Filesystem btrfs /dev/nvme0n1p2 Used: 9.30% - 85.1 GiB of 915 GiB, trend per 1 day 0 hours: +268 MiB, trend per 1 day 0 hours: +0.03%, Time left until disk full: 8 years 246 days
Filesystem btrfs /dev/sda1 Used: 30.35% - 565 GiB of 1.82 TiB, trend per 1 day 0 hours: +433 MiB, trend per 1 day 0 hours: +0.02%, Time left until disk full: 8 years 146 days
Filesystem btrfs /dev/sdb1 Used: 49.20% - 4.47 TiB of 9.10 TiB, trend per 1 day 0 hours: +1.15 GiB, trend per 1 day 0 hours: +0.01%
Filesystem btrfs /dev/sdc1 Used: 59.56% - 4.33 TiB of 7.28 TiB, trend per 1 day 0 hours: -743 MiB, trend per 1 day 0 hours: -0.01%
Filesystem btrfs /dev/sdd1 Used: 0.74% - 152 GiB of 20.0 TiB, trend per 1 day 0 hours: +2.63 MiB, trend per 1 day 0 hours: +<0.01%
Interface 19         [enp1s0f0], (up), MAC: EC:E7:A7:19:E0:04, Speed: 1 GBit/s, In: 8.87 kB/s (<0.01%), Out: 2.91 kB/s (<0.01%)
Interface 21         [enp5s0f0], (up), MAC: A0:36:9F:12:63:28, Speed: 1 GBit/s, In: 0.00 B/s (0%), Out: 68.6 B/s (<0.01%)
Interface 22         [enp5s0f1], (up), MAC: A0:36:9F:12:63:29, Speed: 1 GBit/s, In: 0.00 B/s (0%), Out: 0.00 B/s (0%)
Interface 23         [enp5s0f2], (up), MAC: A0:36:9F:12:63:2A, Speed: 1 GBit/s, In: 196 B/s (<0.01%), Out: 626 B/s (<0.01%)
Interface 43         [xenbr0], (up), MAC: C2:FD:0B:6C:6B:9A, Speed: 1 GBit/s, In: 7.99 kB/s (<0.01%), Out: 12.4 kB/s (<0.01%)
Interface 44         [xenbr1], (up), MAC: 4A:23:2C:71:C0:FF, Speed: 1 GBit/s, In: 0.00 B/s (0%), Out: 0.00 B/s (0%)
Interface 45         [xenbr2], (up), MAC: 6A:EA:FA:CB:49:AD, Speed: 1 GBit/s, In: 0.00 B/s (0%), Out: 0.00 B/s (0%)
Kernel Performance   Process Creations: 68.33/s, Context Switches: 2938.17/s, Major Page Faults: 0.00/s, Page Swap in: 0.00/s, Page Swap Out: 0.00/s
Memory               Total virtual memory: 24.45% - 6.12 GiB of 25.0 GiB, 9 additional details available
Mount options of /   Mount options exactly as expected
Mount options of /boot/efi Mount options exactly as expected
Mount options of /var/mountC1 Mount options exactly as expected
Mount options of /var/samba/mountB1 Mount options exactly as expected
Mount options of /var/samba/share4 Item not found in monitoring data
Mount options of /var/mountA2 Item not found in monitoring data
NTP Time             Offset: -0.3500 ms, Stratum: 1, Jitter: 1.6462 ms, Time since last sync: 8 minutes 12 seconds
Nullmailer Queue     Deferred: 0 mails, Size: 0 B, Failed: 0 mails, Size: 0 B
Number of threads    1299, Usage: 1.65%
SMART ST22000NM001E-3HM103 ZX294BJ5 Stats Reallocated sectors: 0, Powered on: 88 days 3 hours, Spin retries: 0, Power cycles: 33, Uncorrectable errors: 0, Command Timeout Counter: 0, Pending sectors: 0, UDMA CRC errors: 0
SMART ST8000VN004-2M2101 WKD3N87Q Stats Reallocated sectors: 0, Powered on: 5 years 8 days, Spin retries: 0, Power cycles: 105, Uncorrectable errors: 0, Command Timeout Counter: 38655295497, Pending sectors: 0, UDMA CRC errors: 0
SMART Samsung SSD 870 EVO 2TB S754NS0W916927B Stats Reallocated sectors: 0, Powered on: 1 year 338 days, Power cycles: 60, Uncorrectable errors: 0, CRC errors: 0
SMART TOSHIBA MG10ADA10TE 75A2A025FTSJ Stats Reallocated sectors: 0, Powered on: 87 days 15 hours, Spin retries: 0, Power cycles: 30, Reallocated events: 0, Normalized value: 100.00, Pending sectors: 0, UDMA CRC errors: 0
SMART WD_BLACK SN7100 1TB 25240M800748 Stats Powered on: 17 days 1 hour, Power cycles: 59, Critical warning: 0, Media and data integrity errors: 0, Available spare: 100.00%, Percentage used: 2.00%, Error information log entries: 0, Data units read: 1.10 TiB, Data units written: 23.6 TiB
Systemd Service Summary Total: 150, Disabled: 5, Failed: 0
Systemd Socket Summary Total: 20, Disabled: 6, Failed: 0
TCP Connections      Established: 4
Temperature SMART ST22000NM001E-3HM103 ZX294BJ5 Temperature: 26 °C
Temperature SMART ST8000VN004-2M2101 WKD3N87Q Temperature: 29 °C
Temperature SMART Samsung SSD 870 EVO 2TB S754NS0W916927B Temperature: 20 °C
Temperature SMART TOSHIBA MG10ADA10TE 75A2A025FTSJ Temperature: 27 °C
Temperature SMART WD_BLACK SN7100 1TB 25240M800748 Temperature: 24 °C
Uptime               Up since 2026-01-01 16:25:07, Uptime: 7 days 0 hours
+ EXECUTING INVENTORY PLUGINS
 allnet_ip_sensoric: skipped (no data)
 allnet_ip_sensoric: skipped (no data)
 aruba_wlc_aps: skipped (no data)
 aruba_wlc_aps: skipped (no data)
 check_mk: ok
 check_mk: skipped (no data)
 checkmk_agent_plugins: ok
 checkmk_agent_plugins: skipped (no data)
 dell_hw_info: skipped (no data)
 dell_hw_info: skipped (no data)
 docker_node_info: ok
 docker_node_info: skipped (no data)
 fireeye_sys_status: skipped (no data)
 fireeye_sys_status: skipped (no data)
 hp_proliant_da_phydrv: skipped (no data)
 hp_proliant_da_phydrv: skipped (no data)
 hp_proliant_mem: skipped (no data)
 hp_proliant_mem: skipped (no data)
 hp_proliant_systeminfo: skipped (no data)
 hp_proliant_systeminfo: skipped (no data)
 ibm_mq_channels: skipped (no data)
 ibm_mq_channels: skipped (no data)
 ibm_mq_managers: skipped (no data)
 ibm_mq_managers: skipped (no data)
 ibm_mq_queues: skipped (no data)
 ibm_mq_queues: skipped (no data)
 infoblox_osinfo: skipped (no data)
 infoblox_osinfo: skipped (no data)
 infoblox_systeminfo: skipped (no data)
 infoblox_systeminfo: skipped (no data)
 inv_cisco_vlans: skipped (no data)
 inv_cisco_vlans: skipped (no data)
 inv_esx_vsphere_hostsystem: skipped (no data)
 inv_esx_vsphere_hostsystem: skipped (no data)
 inv_if: ok
 inv_if: skipped (no data)
 aix_baselevel: skipped (no data)
 aix_baselevel: skipped (no data)
 aix_lparstat_inventory: skipped (no data)
 aix_lparstat_inventory: skipped (no data)
 aix_packages: skipped (no data)
 aix_packages: skipped (no data)
 aix_service_packs: skipped (no data)
 aix_service_packs: skipped (no data)
 azure_load_balancer: skipped (no data)
 azure_load_balancer: skipped (no data)
 inventory_checkmk: skipped (no data)
 inventory_checkmk: skipped (no data)
 checkpoint_vpn_tunnels: skipped (no data)
 checkpoint_vpn_tunnels: skipped (no data)
 citrix_controller: skipped (no data)
 citrix_controller: skipped (no data)
 citrix_state: skipped (no data)
 citrix_state: skipped (no data)
 couchbase_nodes_ports: skipped (no data)
 couchbase_nodes_ports: skipped (no data)
 dmidecode: skipped (no data)
 dmidecode: skipped (no data)
 docker_container_labels: skipped (no data)
 docker_container_labels: skipped (no data)
 docker_container_network: skipped (no data)
 docker_container_network: skipped (no data)
 inventory_docker_container_node_name: skipped (no data)
 inventory_docker_container_node_name: skipped (no data)
 docker_node_images: ok
 docker_node_images: skipped (no data)
[cpu_tracking] Stop [7f870d3d08c0 - Snapshot(process=posix.times_result(user=0.06999999999999984, system=0.0, children_user=0.0, children_system=0.0, elapsed=0.08000000193715096))]
Trying to acquire lock on /omd/sites/cmk/var/check_mk/crashes/base/3a37d142-ecaa-11f0-a8fd-3e6a5bee8ab1/crash.info
Got lock on /omd/sites/cmk/var/check_mk/crashes/base/3a37d142-ecaa-11f0-a8fd-3e6a5bee8ab1/crash.info
Releasing lock on /omd/sites/cmk/var/check_mk/crashes/base/3a37d142-ecaa-11f0-a8fd-3e6a5bee8ab1/crash.info
Released lock on /omd/sites/cmk/var/check_mk/crashes/base/3a37d142-ecaa-11f0-a8fd-3e6a5bee8ab1/crash.info

The two mount points with the error message were (obviously :)) discovered earlier, but now not anymore (share4, mount2).

Interestingly, two mount points NOT discovered earlier are discovered now (mountA3, share1).

Writing this message, I realized that long not all mount points have been discovered in the first place and are still not discovered.

Host runs on Debian 13.

host1, fstab:

+various mount points of boot SSD

UUID=A       /var/opt/mountA1        btrfs   defaults,subvol=@mountA1        0       0
UUID=A       /var/mountA2  btrfs   defaults,subvol=@mountA2      0       0
UUID=A       /media/mountA3        btrfs   defaults,subvol=@mountA3  0       0


UUID=B       /var/samba/mountB1        btrfs   defaults,subvol=@mountB1  0       0
UUID=B       /var/mountB2    btrfs   defaults,subvol=@mountB2  0       0


UUID=S       /var/samba/share1        btrfs   defaults,subvol=@share1  0       0
UUID=S       /var/samba/share2       btrfs   defaults,subvol=@share2  0       0
UUID=S       /var/samba/share3        btrfs   defaults,subvol=@share3  0       0
UUID=S       /var/samba/share4       btrfs   defaults,subvol=@share4 0       0

UUID=C       /var/mountC1       btrfs   defaults,subvol=@mountC1   0       0

Similar issue with host2, a Home Assistant OS virtual machine. Check_mk_agent via legacy SSH.

  • A previously discovered mount point is not recognized anymore.
  • Only one of the many mount is discovered.

Output of “cmk --debug -vvn hostname” on host2:

value store: loading from disk
Checkmk version 2.4.0p18
+ FETCHING DATA
  Source: SourceInfo(hostname='host2', ipaddress='192.168.x.z', ident='agent', fetcher_type=<FetcherType.PROGRAM: 5>, source_type=<SourceType.HOST: 1>)
[cpu_tracking] Start [7f8c6369a1e0]
Read from cache: AgentFileCache(path_template=/omd/sites/cmk/tmp/check_mk/cache/host2, max_age=MaxAge(checking=0, discovery=90.0, inventory=90.0), simulation=False, use_only_cache=False, file_cache_mode=6)
Not using cache (Too old. Age is 52 sec, allowed is 0 sec)
Calling: ssh -i $OMD_ROOT/.ssh/host2-checkmk -l hassio -T 192.168.x.z ; check_haobserver.py host2 local
Get data from program
Write data to cache file /omd/sites/cmk/tmp/check_mk/cache/host2
Trying to acquire lock on /omd/sites/cmk/tmp/check_mk/cache/host2
Got lock on /omd/sites/cmk/tmp/check_mk/cache/host2
Releasing lock on /omd/sites/cmk/tmp/check_mk/cache/host2
Released lock on /omd/sites/cmk/tmp/check_mk/cache/host2
[cpu_tracking] Stop [7f8c6369a1e0 - Snapshot(process=posix.times_result(user=0.009999999999999787, system=0.0, children_user=0.37, children_system=0.07, elapsed=0.8099999986588955))]
  Source: SourceInfo(hostname='host2', ipaddress='192.168.x.z', ident='piggyback', fetcher_type=<FetcherType.PIGGYBACK: 4>, source_type=<SourceType.HOST: 1>)
[cpu_tracking] Start [7f8c637b9310]
Read from cache: NoCache(path_template=/dev/null, max_age=MaxAge(checking=0.0, discovery=0.0, inventory=0.0), simulation=False, use_only_cache=False, file_cache_mode=1)
0 piggyback files for 'host2'.
0 piggyback files for '192.168.x.z'.
Get piggybacked data
[cpu_tracking] Stop [7f8c637b9310 - Snapshot(process=posix.times_result(user=0.0, system=0.0, children_user=0.0, children_system=0.0, elapsed=0.0))]
[cpu_tracking] Start [7f8c63a570b0]
+ PARSE FETCHER RESULTS
<<<check_mk>>> / Transition NOOPParser -> HostSectionParser
<<<checkmk_agent_plugins_lnx:sep(0)>>> / Transition HostSectionParser -> HostSectionParser
<<<labels:sep(0)>>> / Transition HostSectionParser -> HostSectionParser
<<<nfsmounts_v2:sep(0)>>> / Transition HostSectionParser -> HostSectionParser
<<<cifsmounts>>> / Transition HostSectionParser -> HostSectionParser
<<<mounts>>> / Transition HostSectionParser -> HostSectionParser
<<<ps_lnx>>> / Transition HostSectionParser -> HostSectionParser
<<<docker_container_mem_cgroupv2>>> / Transition HostSectionParser -> HostSectionParser
<<<docker_container_cpu_cgroupv2>>> / Transition HostSectionParser -> HostSectionParser
<<<uptime>>> / Transition HostSectionParser -> HostSectionParser
<<<lnx_if>>> / Transition HostSectionParser -> HostSectionParser
<<<lnx_if:sep(58)>>> / Transition HostSectionParser -> HostSectionParser
<<<tcp_conn_stats>>> / Transition HostSectionParser -> HostSectionParser
<<<docker_container_diskstat_cgroupv2>>> / Transition HostSectionParser -> HostSectionParser
<<<md>>> / Transition HostSectionParser -> HostSectionParser
<<<vbox_guest>>> / Transition HostSectionParser -> HostSectionParser
<<<local>>> / Transition HostSectionParser -> HostSectionParser
  HostKey(hostname='host2', source_type=<SourceType.HOST: 1>)  -> Add sections: ['check_mk', 'checkmk_agent_plugins_lnx', 'cifsmounts', 'docker_container_cpu_cgroupv2', 'docker_container_diskstat_cgroupv2', 'docker_container_mem_cgroupv2', 'labels', 'lnx_if', 'local', 'md', 'mounts', 'nfsmounts_v2', 'ps_lnx', 'tcp_conn_stats', 'uptime', 'vbox_guest']
  HostKey(hostname='host2', source_type=<SourceType.HOST: 1>)  -> Add sections: []
Received no piggyback data
CPU utilization      Total CPU: 0.36%
Check_MK Agent       Version: 2.4.0p18, OS: linux, Transport via SSH, Agent plug-ins: 0, Local checks: 0
Disk IO SUMMARY      Read: 0.00 B/s, Write: 0.00 B/s
Home Assistant Health Health reports Healthy
Home Assistant Supervisor Supervisor reports Connected
Home Assistant Support Support reports Supported
Interface 2          [enX0], (up), MAC: 00:16:3E:F2:93:D2, Speed: unknown, In: 11.7 kB/s, Out: 3.59 kB/s
Interface 3          [docker0], (up), MAC: 12:42:99:9C:47:4E, Speed: 10 GBit/s, In: 0.00 B/s (0%), Out: 0.00 B/s (0%)
Interface 4          [hassio], (up), MAC: 2E:66:5E:47:EB:D5, Speed: 10 GBit/s, In: 1.41 kB/s (<0.01%), Out: 5.13 kB/s (<0.01%)
Memory               RAM: 2.00% - 59.0 MiB of 2.89 GiB
Mount options of /homeassistant Item not found in monitoring data
TCP Connections      Established: 19
Uptime               Up since 2026-01-05 15:50:11, Uptime: 3 days 1 hour
0 piggyback files for 'host2'.
[cpu_tracking] Stop [7f8c63a570b0 - Snapshot(process=posix.times_result(user=0.0, system=0.0, children_user=0.0, children_system=0.0, elapsed=0.009999997913837433))]
[agent] Success, [piggyback] Success (but no data found for this host), execution time 0.8 sec | execution_time=0.820 user_time=0.010 system_time=0.000 children_user_time=0.370 children_system_time=0.070 cmk_time_ds=0.360 cmk_time_agent=0.000

Output of mount on host2 (shortened):

(...)
cgroup on /sys/fs/cgroup type cgroup2 (ro,nosuid,nodev,noexec,relatime,nsdelegate,memory_recursiveprot)
/dev/xvda8 on /media type ext4 (rw,relatime,commit=30)
/dev/xvda8 on /backup type ext4 (rw,relatime,commit=30)
devtmpfs on /dev type devtmpfs (ro,relatime,size=1514888k,nr_inodes=378722,mode=755)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
hugetlbfs on /dev/hugepages type hugetlbfs (rw,nosuid,nodev,relatime,pagesize=2M)
mqueue on /dev/mqueue type mqueue (rw,nosuid,nodev,noexec,relatime)
/dev/xvda8 on /addons type ext4 (rw,relatime,commit=30)
/dev/xvda8 on /share type ext4 (rw,relatime,commit=30)
/dev/xvda8 on /ssl type ext4 (rw,relatime,commit=30)
/dev/xvda8 on /data type ext4 (rw,relatime,commit=30)
/dev/xvda8 on /addon_configs type ext4 (rw,relatime,commit=30)
/dev/xvda8 on /homeassistant type ext4 (rw,relatime,commit=30)
/dev/xvda8 on /run/audio type ext4 (ro,relatime,commit=30)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev,noexec,relatime)
tmpfs on /run/dbus type tmpfs (ro,nosuid,nodev,size=605116k,nr_inodes=819200,mode=755)
/dev/xvda8 on /run/cid type ext4 (ro,relatime,commit=30)
/dev/xvda8 on /etc/asound.conf type ext4 (ro,relatime,commit=30)
/dev/xvda8 on /etc/resolv.conf type ext4 (rw,relatime,commit=30)
/dev/xvda8 on /etc/hostname type ext4 (rw,relatime,commit=30)
/dev/xvda8 on /etc/hosts type ext4 (rw,relatime,commit=30)
tmpfs on /run/log/journal type tmpfs (ro,nosuid,nodev,size=605116k,nr_inodes=819200,mode=755)
/dev/xvda8 on /var/log/journal type ext4 (ro,relatime,commit=30)
/dev/xvda8 on /etc/pulse/client.conf type ext4 (ro,relatime,commit=30)
proc on /proc/bus type proc (ro,nosuid,nodev,noexec,relatime)
(...)

What’s happening?

Any addition debugging info needed?

Thanks for any help!

The issue is that Checkmk uses the device from the output of the mount command.

And this is not unique for btrfs.

1 Like

Thanks! Sounds like a potentially rather easy solution then.

For example, sort the mount output and only use the first occurrence of any given partition?

Then service discovery only complains when changes to fstab have been done (or after manual mounts).

@Sara If I understand this post properly, can this thread serve as a bug report?