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[Bug 1827159] Re: check_all_disks includes squashfs /snap/* which are 100%

To: aims@xxxxxxxxxxxxxxxxxxx
From: Bryce Harrington <1827159@xxxxxxxxxxxxxxxxxx>
Date: Fri, 25 Oct 2019 00:15:13 -0000
Reply-to: Bug 1827159 <1827159@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
** Description changed:

- 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.
+ [Impact]
+ TBD
+ 
+ [Test Case]
+ TBD
+ <Mention any development or SRU processes followed>
+ 
+ [Regression Potential]
+ TBD
+ <attach test result artifacts, if any>
+ 
+ [Fix]
+ See comment #7
+ This will need to be backported.
+ 
+ [Discussion]
+ 
+ [Original Report]
+ 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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which is subscribed to a duplicate bug report (1516451).
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:
  [Impact]
  TBD

  [Test Case]
  TBD
  <Mention any development or SRU processes followed>

  [Regression Potential]
  TBD
  <attach test result artifacts, if any>

  [Fix]
  See comment #7
  This will need to be backported.

  [Discussion]

  [Original Report]
  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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