[SOLVED] safe_mount: 1200 Invalid argument

S

sugoidogo

New Member
Sep 11, 2021
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Running proxmox 7.1-8, Last night all my containers were working fine, this morning I rebooted the server and got this on all of them:
Code: 
safe_mount: 1200 Invalid argument - Failed to mount "/media/hdd" onto "/usr/lib/x86_64-linux-gnu/lxc/rootfs/media/hdd"
mount_entry: 2406 Invalid argument - Failed to mount "/media/hdd" on "/usr/lib/x86_64-linux-gnu/lxc/rootfs/media/hdd"
lxc_setup: 4365 Failed to setup mount entries
do_start: 1274 Failed to setup container "108"
sync_wait: 34 An error occurred in another process (expected sequence number 3)
__lxc_start: 2068 Failed to spawn container "108"
TASK ERROR: startup for container '108' failed
All containers share a mount point for my storage arrays:
Code: 
root@proxmox:~# cat /usr/share/lxc/config/common.conf.d/50-mount.conf
lxc.mount.entry = /media/hdd media/hdd none bind,create=directory 0 0
lxc.mount.entry = /media/ssd media/ssd none bind,create=directory 0 0
Tried updating and rebooting, removing create=directory, and checked that the arrays were available on the host system. No issues found, not sure what's going on.
 
Last edited:
There's another recent thread [1] where users experienced similar issues. For some it was due to a non-default 'proc' entry in /etc/fstab, and for another it was due to some third party software. Can you take a look at it, and see if it helps with your issue?

If not, please post:
  • pveversion -v
  • pct config 108
  • pct start 108 --debug

[1] https://forum.proxmox.com/threads/lxc-containers-not-starting-after-update.101217/
 
I did not have a proc entry to speak of in my fstab. Adding it doesn't seem to have changed anything. I also tried changing my storage mount options to defaults, and that also didn't seem to help. I think the only extra software installed on the host should be nvidia drivers and tuned. Stopping tuned.service didn't help.
Code: 
root@proxmox:~# cat /var/log/apt/history.log

Start-Date: 2022-01-07  10:21:32
Commandline: apt upgrade
Upgrade: libcurl4:amd64 (7.74.0-1.3+b1, 7.74.0-1.3+deb11u1), bind9-host:amd64 (1:9.16.15-1, 1:9.16.22-1~deb11u1), libcurl3-gnutls:amd64 (7.74.0-1.3+b1, 7.74.0-1.3+deb11u1), python3-samba:amd64 (2:4.13.5+dfsg-2, 2:4.13.13+dfsg-1~deb11u2), pve-firmware:amd64 (3.3-3, 3.3-4), tzdata:amd64 (2021a-1+deb11u1, 2021a-1+deb11u2), libldb2:amd64 (2:2.2.0-3.1, 2:2.2.3-2~deb11u1), libpve-cluster-api-perl:amd64 (7.1-2, 7.1-3), xxd:amd64 (2:8.2.2434-3, 2:8.2.2434-3+deb11u1), lxcfs:amd64 (4.0.8-pve2, 4.0.11-pve1), vim-common:amd64 (2:8.2.2434-3, 2:8.2.2434-3+deb11u1), linux-cpupower:amd64 (5.10.70-1, 5.10.84-1), libwbclient0:amd64 (2:4.13.5+dfsg-2, 2:4.13.13+dfsg-1~deb11u2), libsmbclient:amd64 (2:4.13.5+dfsg-2, 2:4.13.13+dfsg-1~deb11u2), pve-cluster:amd64 (7.1-2, 7.1-3), samba-dsdb-modules:amd64 (2:4.13.5+dfsg-2, 2:4.13.13+dfsg-1~deb11u2), wget:amd64 (1.21-1+b1, 1.21-1+deb11u1), lxc-pve:amd64 (4.0.9-4, 4.0.11-1), novnc-pve:amd64 (1.2.0-3, 1.3.0-1), samba-common-bin:amd64 (2:4.13.5+dfsg-2, 2:4.13.13+dfsg-1~deb11u2), publicsuffix:amd64 (20210108.1309-1, 20211207.1025-0+deb11u1), pve-container:amd64 (4.1-2, 4.1-3), vim-tiny:amd64 (2:8.2.2434-3, 2:8.2.2434-3+deb11u1), bind9-dnsutils:amd64 (1:9.16.15-1, 1:9.16.22-1~deb11u1), base-files:amd64 (11.1+deb11u1, 11.1+deb11u2), libnss3:amd64 (2:3.61-1, 2:3.61-1+deb11u1), libgmp10:amd64 (2:6.2.1+dfsg-1, 2:6.2.1+dfsg-1+deb11u1), distro-info-data:amd64 (0.51, 0.51+deb11u1), python3-ldb:amd64 (2:2.2.0-3.1, 2:2.2.3-2~deb11u1), libseccomp2:amd64 (2.5.1-1, 2.5.1-1+deb11u1), smbclient:amd64 (2:4.13.5+dfsg-2, 2:4.13.13+dfsg-1~deb11u2), pve-manager:amd64 (7.1-7, 7.1-8), bind9-libs:amd64 (1:9.16.15-1, 1:9.16.22-1~deb11u1), samba-libs:amd64 (2:4.13.5+dfsg-2, 2:4.13.13+dfsg-1~deb11u2), samba-common:amd64 (2:4.13.5+dfsg-2, 2:4.13.13+dfsg-1~deb11u2), curl:amd64 (7.74.0-1.3+b1, 7.74.0-1.3+deb11u1), libcpupower1:amd64 (5.10.70-1, 5.10.84-1), libpve-cluster-perl:amd64 (7.1-2, 7.1-3), linux-libc-dev:amd64 (5.10.70-1, 5.10.84-1)
End-Date: 2022-01-07  10:21:51

I'm not sure if there's a better way to check apt history.
 
Last edited:
Code: 
root@proxmox:~# pveversion -v
proxmox-ve: 7.1-1 (running kernel: 5.13.19-2-pve)
pve-manager: 7.1-8 (running version: 7.1-8/5b267f33)
pve-kernel-helper: 7.1-6
pve-kernel-5.13: 7.1-5
pve-kernel-5.13.19-2-pve: 5.13.19-4
ceph-fuse: 14.2.21-1
corosync: 3.1.5-pve2
criu: 3.15-1+pve-1
glusterfs-client: 9.2-1
ifupdown: residual config
ifupdown2: 3.1.0-1+pmx3
libjs-extjs: 7.0.0-1
libknet1: 1.22-pve2
libproxmox-acme-perl: 1.4.0
libproxmox-backup-qemu0: 1.2.0-1
libpve-access-control: 7.1-5
libpve-apiclient-perl: 3.2-1
libpve-common-perl: 7.0-14
libpve-guest-common-perl: 4.0-3
libpve-http-server-perl: 4.0-4
libpve-storage-perl: 7.0-15
libspice-server1: 0.14.3-2.1
lvm2: 2.03.11-2.1
lxc-pve: 4.0.11-1
lxcfs: 4.0.11-pve1
novnc-pve: 1.3.0-1
proxmox-backup-client: 2.1.2-1
proxmox-backup-file-restore: 2.1.2-1
proxmox-mini-journalreader: 1.3-1
proxmox-widget-toolkit: 3.4-4
pve-cluster: 7.1-3
pve-container: 4.1-3
pve-docs: 7.1-2
pve-edk2-firmware: 3.20210831-2
pve-firewall: 4.2-5
pve-firmware: 3.3-4
pve-ha-manager: 3.3-1
pve-i18n: 2.6-2
pve-qemu-kvm: 6.1.0-3
pve-xtermjs: 4.12.0-1
qemu-server: 7.1-4
smartmontools: 7.2-1
spiceterm: 3.2-2
swtpm: 0.7.0~rc1+2
vncterm: 1.7-1
zfsutils-linux: 2.1.1-pve3
Code: 
root@proxmox:~# pct config 103
arch: amd64
cores: 8
features: nesting=1
hostname: proxy
memory: 20480
net0: name=eth0,bridge=vmbr0,firewall=1,hwaddr=06:26:6B:75:98:CC,ip=dhcp,ip6=auto,type=veth
ostype: debian
rootfs: local:103/vm-103-disk-0.raw,size=8G
swap: 512
unprivileged: 1
Code: 
root@proxmox:~# pct start 103 --debug
safe_mount: 1200 Invalid argument - Failed to mount "/media/hdd" onto "/usr/lib/x86_64-linux-gnu/lxc/rootfs/media/hdd"
mount_entry: 2406 Invalid argument - Failed to mount "/media/hdd" on "/usr/lib/x86_64-linux-gnu/lxc/rootfs/media/hdd"
lxc_setup: 4365 Failed to setup mount entries
do_start: 1274 Failed to setup container "103"
sync_wait: 34 An error occurred in another process (expected sequence number 3)
__lxc_start: 2068 Failed to spawn container "103"
95350.163 DEBUG    seccomp - seccomp.c:parse_config_v2:656 - Host native arch is [3221225534]
INFO     seccomp - seccomp.c:parse_config_v2:807 - Processing "reject_force_umount  # comment this to allow umount -f;  not recommended"
INFO     seccomp - seccomp.c:do_resolve_add_rule:524 - Set seccomp rule to reject force umounts
INFO     seccomp - seccomp.c:do_resolve_add_rule:524 - Set seccomp rule to reject force umounts
INFO     seccomp - seccomp.c:do_resolve_add_rule:524 - Set seccomp rule to reject force umounts
INFO     seccomp - seccomp.c:parse_config_v2:807 - Processing "[all]"
INFO     seccomp - seccomp.c:parse_config_v2:807 - Processing "kexec_load errno 1"
INFO     seccomp - seccomp.c:do_resolve_add_rule:564 - Adding native rule for syscall[246:kexec_load] action[327681:errno] arch[0]
INFO     seccomp - seccomp.c:do_resolve_add_rule:564 - Adding compat rule for syscall[246:kexec_load] action[327681:errno] arch[1073741827]
INFO     seccomp - seccomp.c:do_resolve_add_rule:564 - Adding compat rule for syscall[246:kexec_load] action[327681:errno] arch[1073741886]
INFO     seccomp - seccomp.c:parse_config_v2:807 - Processing "open_by_handle_at errno 1"
INFO     seccomp - seccomp.c:do_resolve_add_rule:564 - Adding native rule for syscall[304:open_by_handle_at] action[327681:errno] arch[0]
INFO     seccomp - seccomp.c:do_resolve_add_rule:564 - Adding compat rule for syscall[304:open_by_handle_at] action[327681:errno] arch[1073741827]
INFO     seccomp - seccomp.c:do_resolve_add_rule:564 - Adding compat rule for syscall[304:open_by_handle_at] action[327681:errno] arch[1073741886]
INFO     seccomp - seccomp.c:parse_config_v2:807 - Processing "init_module errno 1"
INFO     seccomp - seccomp.c:do_resolve_add_rule:564 - Adding native rule for syscall[175:init_module] action[327681:errno] arch[0]
INFO     seccomp - seccomp.c:do_resolve_add_rule:564 - Adding compat rule for syscall[175:init_module] action[327681:errno] arch[1073741827]
INFO     seccomp - seccomp.c:do_resolve_add_rule:564 - Adding compat rule for syscall[175:init_module] action[327681:errno] arch[1073741886]
INFO     seccomp - seccomp.c:parse_config_v2:807 - Processing "finit_module errno 1"
INFO     seccomp - seccomp.c:do_resolve_add_rule:564 - Adding native rule for syscall[313:finit_module] action[327681:errno] arch[0]
INFO     seccomp - seccomp.c:do_resolve_add_rule:564 - Adding compat rule for syscall[313:finit_module] action[327681:errno] arch[1073741827]
INFO     seccomp - seccomp.c:do_resolve_add_rule:564 - Adding compat rule for syscall[313:finit_module] action[327681:errno] arch[1073741886]
INFO     seccomp - seccomp.c:parse_config_v2:807 - Processing "delete_module errno 1"
INFO     seccomp - seccomp.c:do_resolve_add_rule:564 - Adding native rule for syscall[176:delete_module] action[327681:errno] arch[0]
INFO     seccomp - seccomp.c:do_resolve_add_rule:564 - Adding compat rule for syscall[176:delete_module] action[327681:errno] arch[1073741827]
INFO     seccomp - seccomp.c:do_resolve_add_rule:564 - Adding compat rule for syscall[176:delete_module] action[327681:errno] arch[1073741886]
INFO     seccomp - seccomp.c:parse_config_v2:807 - Processing "ioctl errno 1 [1,0x9400,SCMP_CMP_MASKED_EQ,0xff00]"
INFO     seccomp - seccomp.c:do_resolve_add_rule:547 - arg_cmp[0]: SCMP_CMP(1, 7, 65280, 37888)
INFO     seccomp - seccomp.c:do_resolve_add_rule:564 - Adding native rule for syscall[16:ioctl] action[327681:errno] arch[0]
INFO     seccomp - seccomp.c:do_resolve_add_rule:547 - arg_cmp[0]: SCMP_CMP(1, 7, 65280, 37888)
INFO     seccomp - seccomp.c:do_resolve_add_rule:564 - Adding compat rule for syscall[16:ioctl] action[327681:errno] arch[1073741827]
INFO     seccomp - seccomp.c:do_resolve_add_rule:547 - arg_cmp[0]: SCMP_CMP(1, 7, 65280, 37888)
INFO     seccomp - seccomp.c:do_resolve_add_rule:564 - Adding compat rule for syscall[16:ioctl] action[327681:errno] arch[1073741886]
INFO     seccomp - seccomp.c:parse_config_v2:807 - Processing "keyctl errno 38"
INFO     seccomp - seccomp.c:do_resolve_add_rule:564 - Adding native rule for syscall[250:keyctl] action[327718:errno] arch[0]
INFO     seccomp - seccomp.c:do_resolve_add_rule:564 - Adding compat rule for syscall[250:keyctl] action[327718:errno] arch[1073741827]
INFO     seccomp - seccomp.c:do_resolve_add_rule:564 - Adding compat rule for syscall[250:keyctl] action[327718:errno] arch[1073741886]
INFO     seccomp - seccomp.c:parse_config_v2:1017 - Merging compat seccomp contexts into main context
INFO     start - start.c:lxc_init:883 - Container "103" is initialized
INFO     cgfsng - cgroups/cgfsng.c:cgfsng_monitor_create:1028 - The monitor process uses "lxc.monitor/103" as cgroup
DEBUG    storage - storage/storage.c:storage_query:231 - Detected rootfs type "dir"
DEBUG    storage - storage/storage.c:storage_query:231 - Detected rootfs type "dir"
INFO     cgfsng - cgroups/cgfsng.c:cgfsng_payload_create:1136 - The container process uses "lxc/103/ns" as inner and "lxc/103" as limit cgroup
INFO     start - start.c:lxc_spawn:1759 - Cloned CLONE_NEWUSER
INFO     start - start.c:lxc_spawn:1759 - Cloned CLONE_NEWNS
INFO     start - start.c:lxc_spawn:1759 - Cloned CLONE_NEWPID
INFO     start - start.c:lxc_spawn:1759 - Cloned CLONE_NEWUTS
INFO     start - start.c:lxc_spawn:1759 - Cloned CLONE_NEWIPC
INFO     start - start.c:lxc_spawn:1759 - Cloned CLONE_NEWCGROUP
DEBUG    start - start.c:lxc_try_preserve_namespace:139 - Preserved user namespace via fd 17 and stashed path as user:/proc/3909/fd/17
DEBUG    start - start.c:lxc_try_preserve_namespace:139 - Preserved mnt namespace via fd 18 and stashed path as mnt:/proc/3909/fd/18
DEBUG    start - start.c:lxc_try_preserve_namespace:139 - Preserved pid namespace via fd 19 and stashed path as pid:/proc/3909/fd/19
DEBUG    start - start.c:lxc_try_preserve_namespace:139 - Preserved uts namespace via fd 20 and stashed path as uts:/proc/3909/fd/20
DEBUG    start - start.c:lxc_try_preserve_namespace:139 - Preserved ipc namespace via fd 21 and stashed path as ipc:/proc/3909/fd/21
DEBUG    start - start.c:lxc_try_preserve_namespace:139 - Preserved cgroup namespace via fd 22 and stashed path as cgroup:/proc/3909/fd/22
DEBUG    conf - conf.c:idmaptool_on_path_and_privileged:3511 - The binary "/usr/bin/newuidmap" does have the setuid bit set
DEBUG    conf - conf.c:idmaptool_on_path_and_privileged:3511 - The binary "/usr/bin/newgidmap" does have the setuid bit set
DEBUG    conf - conf.c:lxc_map_ids:3596 - Functional newuidmap and newgidmap binary found
INFO     cgfsng - cgroups/cgfsng.c:cgfsng_setup_limits:2828 - Limits for the unified cgroup hierarchy have been setup
DEBUG    conf - conf.c:idmaptool_on_path_and_privileged:3511 - The binary "/usr/bin/newuidmap" does have the setuid bit set
DEBUG    conf - conf.c:idmaptool_on_path_and_privileged:3511 - The binary "/usr/bin/newgidmap" does have the setuid bit set
INFO     conf - conf.c:lxc_map_ids:3594 - Caller maps host root. Writing mapping directly
NOTICE   utils - utils.c:lxc_drop_groups:1347 - Dropped supplimentary groups
INFO     start - start.c:do_start:1106 - Unshared CLONE_NEWNET
NOTICE   utils - utils.c:lxc_drop_groups:1347 - Dropped supplimentary groups
NOTICE   utils - utils.c:lxc_switch_uid_gid:1323 - Switched to gid 0
NOTICE   utils - utils.c:lxc_switch_uid_gid:1332 - Switched to uid 0
DEBUG    start - start.c:lxc_try_preserve_namespace:139 - Preserved net namespace via fd 5 and stashed path as net:/proc/3909/fd/5
INFO     conf - conf.c:run_script_argv:337 - Executing script "/usr/share/lxc/lxcnetaddbr" for container "103", config section "net"
DEBUG    network - network.c:netdev_configure_server_veth:851 - Instantiated veth tunnel "veth103i0 <--> vethyZpzTE"
DEBUG    conf - conf.c:lxc_mount_rootfs:1432 - Mounted rootfs "/var/lib/lxc/103/rootfs" onto "/usr/lib/x86_64-linux-gnu/lxc/rootfs" with options "(null)"
INFO     conf - conf.c:setup_utsname:875 - Set hostname to "proxy"
DEBUG    network - network.c:setup_hw_addr:3807 - Mac address "06:26:6B:75:98:CC" on "eth0" has been setup
DEBUG    network - network.c:lxc_network_setup_in_child_namespaces_common:3948 - Network device "eth0" has been setup
INFO     network - network.c:lxc_setup_network_in_child_namespaces:4005 - Finished setting up network devices with caller assigned names
INFO     conf - conf.c:mount_autodev:1215 - Preparing "/dev"
INFO     conf - conf.c:mount_autodev:1276 - Prepared "/dev"
DEBUG    conf - conf.c:lxc_mount_auto_mounts:735 - Invalid argument - Tried to ensure procfs is unmounted
DEBUG    conf - conf.c:lxc_mount_auto_mounts:758 - Invalid argument - Tried to ensure sysfs is unmounted
DEBUG    conf - conf.c:mount_entry:2412 - Remounting "/sys/fs/fuse/connections" on "/usr/lib/x86_64-linux-gnu/lxc/rootfs/sys/fs/fuse/connections" to respect bind or remount options
DEBUG    conf - conf.c:mount_entry:2431 - Flags for "/sys/fs/fuse/connections" were 4110, required extra flags are 14
DEBUG    conf - conf.c:mount_entry:2475 - Mounted "/sys/fs/fuse/connections" on "/usr/lib/x86_64-linux-gnu/lxc/rootfs/sys/fs/fuse/connections" with filesystem type "none"
ERROR    utils - utils.c:safe_mount:1200 - Invalid argument - Failed to mount "/media/hdd" onto "/usr/lib/x86_64-linux-gnu/lxc/rootfs/media/hdd"
ERROR    conf - conf.c:mount_entry:2406 - Invalid argument - Failed to mount "/media/hdd" on "/usr/lib/x86_64-linux-gnu/lxc/rootfs/media/hdd"
ERROR    conf - conf.c:lxc_setup:4365 - Failed to setup mount entries
ERROR    start - start.c:do_start:1274 - Failed to setup container "103"
ERROR    sync - sync.c:sync_wait:34 - An error occurred in another process (expected sequence number 3)
DEBUG    network - network.c:lxc_delete_network:4159 - Deleted network devices
ERROR    start - start.c:__lxc_start:2068 - Failed to spawn container "103"
WARN     start - start.c:lxc_abort:1038 - No such process - Failed to send SIGKILL via pidfd 16 for process 3931
startup for container '103' failed
 
Code: 
root@proxmox:~# cat /usr/share/lxc/config/common.conf.d/50-mount.conf
lxc.mount.entry = /media/hdd media/hdd none bind,create=dir 0 0
lxc.mount.entry = /media/ssd media/ssd none bind,create=dir 0 0
No change, still failing.
 
Update: I have located the issue. I have an overlayfs mount inside the bind mount that causes mounts to fail when active but works fine post-startup.
 
I have solved the issue by adding overlay to /etc/modules and moving the overlay mount from the host to the container's /etc/fstab. Another thing of note is that the noauto,x-systemd.automount option caused the container to hang indefinitely on startup, so I had to go without it.
 
Last edited:
sugoidogo said:
I have solved the issue by adding overlay to /etc/modules and moving the overlay mount from the host to the container's /etc/fstab. Another thing of note is that the noauto,x-systemd.automount option caused the container to hang indefinitely on startup, so I had to go without it.
Click to expand...
I think I have the same issue. For whatever reason after working perfectly for months, I am having this same issue. I have Docker in an LXC. There are two bind mounts into the LXC and then those are bind mounted into Docker containers. For whatever reason one bind mount causes this error and the other does not. And yes I was using fuse-overlayfs, though when I reverted to a snapshot without fuse-overlayfs it fixed nothing.

In any event, can you better explain your fix? Where did you edit /etc/modules? On the physical Proxmox host or within the LXC? And as for the fstab, was this in LXC or in a Docker container?
 
Last edited:
Funny thing: I just ran into this also today. mp0: /srv/proxmox,mp=/srv/proxmox works but lxc.mount.entry: /srv/proxmox srv/proxmox none bind 0 0 fails. There are other drives/filesystems mounted under /srv/proxmox/, could that be the problem?
Code: 
safe_mount: 1221 Invalid argument - Failed to mount "/sys/kernel/debug" onto "/usr/lib/x86_64-linux-gnu/lxc/rootfs/sys/kernel/debug"
safe_mount: 1221 Invalid argument - Failed to mount "/srv/proxmox" onto "/usr/lib/x86_64-linux-gnu/lxc/rootfs/srv/proxmox"
mount_entry: 2410 Invalid argument - Failed to mount "/srv/proxmox" on "/usr/lib/x86_64-linux-gnu/lxc/rootfs/srv/proxmox"
lxc_setup: 4375 Failed to setup mount entries
do_start: 1275 Failed to setup container "118"

EDIT: Yes, making sure there are no other filesystem mounts within the directory resolves the problem.
 
Last edited:
leesteken said:
Funny thing: I just ran into this also today. mp0: /srv/proxmox,mp=/srv/proxmox works but lxc.mount.entry: /srv/proxmox srv/proxmox none bind 0 0 fails. There are other drives/filesystems mounted under /srv/proxmox/, could that be the problem?
Code: 
safe_mount: 1221 Invalid argument - Failed to mount "/sys/kernel/debug" onto "/usr/lib/x86_64-linux-gnu/lxc/rootfs/sys/kernel/debug"
safe_mount: 1221 Invalid argument - Failed to mount "/srv/proxmox" onto "/usr/lib/x86_64-linux-gnu/lxc/rootfs/srv/proxmox"
mount_entry: 2410 Invalid argument - Failed to mount "/srv/proxmox" on "/usr/lib/x86_64-linux-gnu/lxc/rootfs/srv/proxmox"
lxc_setup: 4375 Failed to setup mount entries
do_start: 1275 Failed to setup container "118"

EDIT: Yes, making sure there are no other filesystem mounts within the directory resolves the problem.
Click to expand...
My issue started after a failed backup snapshot. There is nothing else mounted in the path. Could a snapshot create a mount like this? Which doesn’t make sense as using lxc.mount.entry (as opposed to mpX syntax) should not snap that dataset.
 
Last edited:
I figured my issue out. Somehow a snapshot related to the dataset was mounted for reasons I can’t explain. Thanks for the hint.
 
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