Re: Trigger full os update/upgrade

      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 !

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';

,----
| 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";
| 
| }
`----
Listing 1: Example Policy

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.

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