How to install CMK agent in a VDI environment where servers are based off a master image?

[c3rberus (MD)]

I have a scenario where I want to install the CMK agent on a few servers that are part of our Citrix XenApp (VDI) environment.

There are 4 servers that are based off a “master image”. Every time we do our windows updates, we push these changes to the 4 servers from master image and any custom settings on those 4 servers gets discarded.

Now I would typically just install the CMK agent and register the server using “./cmk-update-agent.exe register -s nagios.xxxx.com -i nagios -H XXX-MYSRV1 -p https -U cmkadmin -P XXXXX -v”

However this won’t work in this situation, when the master image changes are pushed to these servers, we will essentially have 4 instances of the CMK agent using the master image hostname.

Is there a solution to this? Running CMK 1.6p8 EE.

[aeckstein (Andre Eckstein)]

Hi,

you could

a) install the checkmk agent without the agent updater plugin in the master image and update it manually in the master when a new version comes out or a new package is baked for these servers

b) don´t register the master server itself but automate re-registering the agent in the four citrix servers after roll out e.g. with a local powershell/batch script or through config management

[mace (Matthias Hähnel)]

IMO a) is the easier way. We do it like this with around 100 servers