Only /proc/cpuinfo is empty or null

[chewmunk]

Only /proc/cpuinfo is empty or null; other information is well visible.

k8s node in /var/lib/lxc/lcxfs/proc

Please tell me how to restore the node without rebooting it in order not to affect the other pods you are using.

lxcfs-ds-pod log
/usr/bin/lxcfs --debug --enable-loadavg --enable-cfs /var/lib/lxc/lxcfs
Running constructor lxcfs_init to reload liblxcfs
mount namespace: 5
hierarchies:
0: fd: 6: cpuset,cpu,io,memory,hugetlb,pids,rdma,misc
Kernel supports pidfds
Kernel does not support swap accounting
api_extensions:

• cgroups
• sys_cpu_online
• proc_cpuinfo
• proc_diskstats
• proc_loadavg
• proc_meminfo
• proc_stat
• proc_swaps
• proc_uptime
• proc_slabinfo
• shared_pidns
• cpuview_daemon
• loadavg_daemon
• pidfds
  FUSE library version: 3.16.2
  nullpath_ok: 0
  unique: 2, opcode: INIT (26), nodeid: 0, insize: 56, pid: 0
  INIT: 7.34
  flags=0x33fffffb
  max_readahead=0x00020000
  INIT: 7.38
  flags=0x0040f039
  max_readahead=0x00020000
  max_write=0x00100000
  max_background=0
  congestion_threshold=0
  time_gran=1
  unique: 2, success, outsize: 80
  unique: 4, opcode: LOOKUP (1), nodeid: 1, insize: 45, pid: 1864049
  LOOKUP /proc
  getattr[NULL] /proc
  NODEID: 2
  unique: 4, success, outsize: 144
  unique: 6, opcode: LOOKUP (1), nodeid: 2, insize: 48, pid: 1864049
  LOOKUP /proc/cpuinfo
  getattr[NULL] /proc/cpuinfo
  NODEID: 3
  unique: 6, success, outsize: 144
  unique: 8, opcode: GETATTR (3), nodeid: 1, insize: 56, pid: 1864053
  getattr[NULL] /
  unique: 8, success, outsize: 120
  unique: 10, opcode: LOOKUP (1), nodeid: 2, insize: 50, pid: 1864055
  LOOKUP /proc/diskstats
  getattr[NULL] /proc/diskstats
  NODEID: 4
  unique: 10, success, outsize: 144
  unique: 12, opcode: LOOKUP (1), nodeid: 2, insize: 48, pid: 1864061
  LOOKUP /proc/loadavg
  getattr[NULL] /proc/loadavg
  NODEID: 5
  unique: 12, success, outsize: 144
  unique: 14, opcode: LOOKUP (1), nodeid: 2, insize: 48, pid: 1864067
  LOOKUP /proc/meminfo
  getattr[NULL] /proc/meminfo
  NODEID: 6
  unique: 14, success, outsize: 144
  unique: 16, opcode: LOOKUP (1), nodeid: 2, insize: 45, pid: 1864073
  LOOKUP /proc/stat
  getattr[NULL] /proc/stat
  NODEID: 7
  unique: 16, success, outsize: 144
  unique: 18, opcode: LOOKUP (1), nodeid: 2, insize: 46, pid: 1864080
  LOOKUP /proc/swaps
  getattr[NULL] /proc/swaps
  NODEID: 8
  unique: 18, success, outsize: 144
  unique: 20, opcode: LOOKUP (1), nodeid: 2, insize: 47, pid: 1864086
  LOOKUP /proc/uptime
  getattr[NULL] /proc/uptime
  NODEID: 9
  unique: 20, success, outsize: 144
  unique: 22, opcode: LOOKUP (1), nodeid: 1, insize: 44, pid: 1864094
  LOOKUP /sys
  getattr[NULL] /sys
  NODEID: 10
  unique: 22, success, outsize: 144
  unique: 24, opcode: LOOKUP (1), nodeid: 10, insize: 48, pid: 1864094
  LOOKUP /sys/devices
  getattr[NULL] /sys/devices
  NODEID: 11
  unique: 24, success, outsize: 144
  unique: 26, opcode: LOOKUP (1), nodeid: 11, insize: 47, pid: 1864094
  LOOKUP /sys/devices/system
  getattr[NULL] /sys/devices/system
  NODEID: 12
  unique: 26, success, outsize: 144
  unique: 28, opcode: LOOKUP (1), nodeid: 12, insize: 44, pid: 1864094
  LOOKUP /sys/devices/system/cpu
  getattr[NULL] /sys/devices/system/cpu
  NODEID: 13
  unique: 28, success, outsize: 144
  unique: 30, opcode: LOOKUP (1), nodeid: 13, insize: 47, pid: 1864094
  LOOKUP /sys/devices/system/cpu/online
  getattr[NULL] /sys/devices/system/cpu/online
  NODEID: 14
  unique: 30, success, outsize: 144
  unique: 32, opcode: LOOKUP (1), nodeid: 1, insize: 45, pid: 1864391
  LOOKUP /proc
  getattr[NULL] /proc
  NODEID: 2
  unique: 32, success, outsize: 144
  unique: 34, opcode: STATFS (17), nodeid: 1, insize: 40, pid: 3382
  unique: 34, success, outsize: 96
  unique: 36, opcode: STATFS (17), nodeid: 1, insize: 40, pid: 2393381
  unique: 36, success, outsize: 96
  unique: 38, opcode: OPEN (14), nodeid: 14, insize: 48, pid: 1864861
  open flags: 0x8000 /sys/devices/system/cpu/online
  open[94652746107344] flags: 0x8000 /sys/devices/system/cpu/online
  unique: 38, success, outsize: 32
  unique: 40, opcode: READ (15), nodeid: 14, insize: 80, pid: 1864861
  read[94652746107344] 1024 bytes from 0 flags: 0x8000
  read[94652746107344] 4 bytes from 0
  unique: 40, success, outsize: 20
  unique: 42, opcode: FLUSH (25), nodeid: 14, insize: 64, pid: 1864861
  flush[94652746107344]
  unique: 42, success, outsize: 16
  unique: 44, opcode: RELEASE (18), nodeid: 14, insize: 64, pid: 0
  release[94652746107344] flags: 0x8000
  unique: 44, success, outsize: 16
  unique: 46, opcode: OPEN (14), nodeid: 9, insize: 48, pid: 1864861
  open flags: 0x8000 /proc/uptime
  open[94652746107536] flags: 0x8000 /proc/uptime
  unique: 46, success, outsize: 32
  unique: 48, opcode: READ (15), nodeid: 9, insize: 80, pid: 1864861
  read[94652746107536] 8191 bytes from 0 flags: 0x8000
  read[94652746107536] 20 bytes from 0
  unique: 48, success, outsize: 36
  unique: 50, opcode: OPEN (14), nodeid: 6, insize: 48, pid: 1864861
  open flags: 0x8000 /proc/meminfo
  open[94652746107344] flags: 0x8000 /proc/meminfo
  unique: 50, success, outsize: 32