I need some virtualization advice.
I’m currently running this blog, among others, on XEN 3.1.2 based virtualization on CentOS 5.5.
At the present time, I have three physical machines running … rivendell, gondor, and middle-earth.
Middle-earth”is the XEN host.
Rivendell and gondor are stand alone servers running Fedodra 10.
Currently gondor is primarily a web server and backup mail delivery server.
Rivendell is the main system and acts as a NIS server, MySQL server, samba file server, chat server, mail server, etc.
My goal is to migrate all the functions from rivendell & gondor to XEN instances on middle-earth.
My questions relate to where to run services, file systems, and processor allocation.
Where should major services be run (such as authentication, database, etc)?
I’ve currently got multiple thoughts on this …
- Run the services on the XEN host so that everything is central and automatically available before any of the client instances start up.
- Run the services on a dedicated client instance … but this requires that I ensure that the client instance is active before any of the other instances start.
- Possibly run some services on the XEN host and others on a dedicated instance?
The VM host is just there to host the VMs, put all services into guests.