Trigger full os update/upgrade

[Guillaume YONNET]

Hello,

Quite new in CfEngine configuration, and I would like to know if there was a way to :

• Trigger full OS update/upgrade (on supported Linux distro)
• Launch this update through WEB UI (MISSION PORTAL) ?

Thx in advance !

[Nick Anderson]

Hi,

Sure. Totally doable, in many different ways.

Here is a small contrived example:

First, write your policy to trigger the full os update, guard that with a class like OS_update_upgrade_allowed;

Listing 1: Example Policy

bundle agent __main__
{
   methods:

     OS_update_upgrade_allowed::

      "Full OS Update/Upgrade"
        usebundle => full_os_update_upgrade;

}
bundle agent full_os_update_upgrade
{
  # Describe what is needed to update/upgrade

  commands:
    ubuntu::
      "/usr/bin/do-release-upgrade";

}

Then, assuming you are using 3.18.x you can use the CMDB functionality to define the default:OS_update_upgrade_allowed class on the hosts you want to upgrade. Note: by default the CMDB classes are defined in the data namespace, so specifying it with the default: prefix lets you target the default namesapce.