syncronize between to machine

Hi.

I have 2 esxi host and  a machine on one of them . that machine's Os is redhat (linux) and  SqlServer has been installed on it now i want create a new machine such as first machine and i want to do syncronize between  both of these machine  all times specially their database(Sql server) .

now what do i have to do ?

what do i need to install ?

thanks.