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[Ramon Grullon <ramon.grullon@xxxxxxxxxxxxx>]

Currently experiencing this issue at customer site where there is a
permission issue as nagios user can't access this directory, this
particular mount point/directory is owned by root and the permission set
on this is 700.

The -X tracefs is not working. Would a new check be needed for tracefs
similar to the one for squashfs?


ubuntu@XXXXXXnagios-1:/snap/core/7270$ /usr/lib/nagios/plugins/check_disk -w '20%' -c '10%' -e
DISK CRITICAL - /sys/kernel/debug/tracing is not accessible: Permission denied

ubuntu@XXXXXXnagios-1:/snap/core/7270$ sudo ls -ld /sys/kernel/debug/tracing
drwx------ 8 root root 0 May 9 11:22 /sys/kernel/debug/tracing

ubuntu@XXXXXXXXnagios-1:/snap/core/7270$ mount | grep /sys/kernel/debug/tracing
tracefs on /sys/kernel/debug/tracing type tracefs (rw,relatime)

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https://bugs.launchpad.net/bugs/1827159

Title:
  check_all_disks includes squashfs /snap/* which are 100%

Status in Nagios Charm:
  Fix Released
Status in monitoring-plugins package in Ubuntu:
  Triaged

Bug description:
  When using nagios to monitor the Nagios host itself, if the host is
  not a container, the template for checking the disk space on the
  Nagios host does not exclude any snap filesystems.  This means we get
  a Critical report if any snap is installed.

  This can be changed by adding to the check_all_disks command a '-X
  squashfs', but that command is defined in the nagios plugins package.

  (Or, perhaps '-X tmpfs'? -- bryce)

  [Test Case]
  $ lxc create ubuntu-daily:19.10/amd64 lp1827159
  $ lxc exec lp1827159 bash
  # apt-get -y update
  # apt-get install monitoring-plugins
  # snap install gnome-calculator
  [...]
  # /usr/lib/nagios/plugins/check_disk -w 10 -c 10
  DISK CRITICAL - free space: / 1903 MB (1% inode=78%); /dev 0 MB (100% inode=99%); /dev/full 16018 MB (100% inode=99%); /dev/null 16018 MB (100% inode=99%); /dev/random 16018 MB (100% inode=99%); /dev/tty 16018 MB (100% inode=99%); /dev/urandom 16018 MB (100% inode=99%); /dev/zero 16018 MB (100% inode=99%); /dev/fuse 16018 MB (100% inode=99%); /dev/net/tun 16018 MB (100% inode=99%); /dev/lxd 0 MB (100% inode=99%); /dev/.lxd-mounts 0 MB (100% inode=99%); /dev/shm 16041 MB (100% inode=99%); /run 3208 MB (99% inode=99%); /run/lock 5 MB (100% inode=99%); /sys/fs/cgroup 16041 MB (100% inode=99%); /snap 1903 MB (1% inode=78%); /run/snapd/ns 3208 MB (99% inode=99%);| /=111171MB;119160;119160;0;119170 /dev=0MB;-10;-10;0;0 /dev/full=0MB;16008;16008;0;16018 /dev/null=0MB;16008;16008;0;16018 /dev/random=0MB;16008;16008;0;16018 /dev/tty=0MB;16008;16008;0;16018 /dev/urandom=0MB;16008;16008;0;16018 /dev/zero=0MB;16008;16008;0;16018 /dev/fuse=0MB;16008;16008;0;16018 /dev/net/tun=0MB;16008;16008;0;16018 /dev/lxd=0MB;-10;-10;0;0 /dev/.lxd-mounts=0MB;-10;-10;0;0 /dev/shm=0MB;16031;16031;0;16041 /run=0MB;3198;3198;0;3208 /run/lock=0MB;-5;-5;0;5 /sys/fs/cgroup=0MB;16031;16031;0;16041 /snap=111171MB;119160;119160;0;119170 /run/snapd/ns=0MB;3198;3198;0;3208

  # /usr/lib/nagios/plugins/check_disk -w 10 -c 10 -e -X squashfs
  DISK CRITICAL - free space: /dev 0 MB (100% inode=99%); /dev/lxd 0 MB (100% inode=99%); /dev/.lxd-mounts 0 MB (100% inode=99%); /run/lock 5 MB (100% inode=99%);| /=111392MB;119160;119160;0;119170 /dev=0MB;-10;-10;0;0 /dev/full=0MB;16008;16008;0;16018 /dev/null=0MB;16008;16008;0;16018 /dev/random=0MB;16008;16008;0;16018 /dev/tty=0MB;16008;16008;0;16018 /dev/urandom=0MB;16008;16008;0;16018 /dev/zero=0MB;16008;16008;0;16018 /dev/fuse=0MB;16008;16008;0;16018 /dev/net/tun=0MB;16008;16008;0;16018 /dev/lxd=0MB;-10;-10;0;0 /dev/.lxd-mounts=0MB;-10;-10;0;0 /dev/shm=0MB;16031;16031;0;16041 /run=0MB;3198;3198;0;3208 /run/lock=0MB;-5;-5;0;5 /sys/fs/cgroup=0MB;16031;16031;0;16041 /snap=111392MB;119160;119160;0;119170 /run/snapd/ns=0MB;3198;3198;0;3208

  # /usr/lib/nagios/plugins/check_disk -w 10 -c 10 -e -X tmpfs
  DISK OK| /=111171MB;119160;119160;0;119170 /dev/full=0MB;16008;16008;0;16018 /dev/null=0MB;16008;16008;0;16018 /dev/random=0MB;16008;16008;0;16018 /dev/tty=0MB;16008;16008;0;16018 /dev/urandom=0MB;16008;16008;0;16018 /dev/zero=0MB;16008;16008;0;16018 /dev/fuse=0MB;16008;16008;0;16018 /dev/net/tun=0MB;16008;16008;0;16018 /snap=111171MB;119160;119160;0;119170

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