LMA toolchain should alert when packages upgrade is available

[Swann Croiset]

Mainly for security reason, the LMA toolchain should alert when packages upgrade is highly recommended.

For example, the package nagios-plugins-basic [0] provides the command: check_apt

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root@node-23:~# /usr/lib/nagios/plugins/check_apt
APT CRITICAL: 3 packages available for upgrade (2 critical updates). |available_upgrades=3;;;0 critical_updates=2;;;0

root@node-23:~# apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following packages will be upgraded:
  libssl1.0.0 openssl
The following packages will be DOWNGRADED:
  python-urllib3
2 upgraded, 0 newly installed, 1 downgraded, 0 to remove and 0 not upgraded.
Need to get 1,443 kB of archives.
After this operation, 124 kB of additional disk space will be used.
Do you want to continue? [Y/n]
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[0] http://packages.ubuntu.com/trusty/nagios-plugins-basic

[Simon Pasquier (simon-pasquier)]

I'm surprised that the operating system isn't configured to install all security updates automatically but that's a good catch anyhow...