We use Check_MK version 1.2.4P5 and was installed before me on a CentOS machine.
Since we are planning to upgrade and renew contract I was looking into a Virtual Appliance. Besides it’s being virtual and probably easier to config than installing the packages on a Centos machine, does a Virtual Appliance have more advantages?
On what OS does the appliance run, is this CentOS?
Can I easily move from my current Check_MK config to the appliance based or do I have to configure from scratch?
You can migrate a site into the appliance with omd backup / omd restore. But you will first have to upgrade your site to a version the appliance firmware supports.