Multiserver and etc/hosts configuration

In a multisever with dedicated servers, how can i set /etc/hosts file if my domains are?:

• web1.domainA.com
• web1.domainB.com
• mail1.domainA.com
• mail1.domainB.com
• db1.domainA.com
• db1.domainB.com
• ns1.domainA.com
• ns1.domainB.com

Thanks

 

I use proxmox with openvz containers and my issue is that the hostname is the subdomain of fqdn, then i have this config:

• IP1 web1.domainA.com web1
  
• IP2 web1.domainB.com web1
• IP3 mail1.domainA.com mail1
  
• IP4 mail1.domainB.com mail1
• IP5 db1.domainA.com db1
  
• IP6 db1.domainB.com db1
  
• IP7 ns1.domainA.com ns1
  
• IP8 ns1.domainB.com ns1

 

Structure of /etc/hosts is as follows::
For BSD/MSD

Code:

IP_or_IPRange ::_:: hostName ::_::

 

Yes, but in Perfect setup Multiserver Setup With Dedicated Web, Email, DNS & MySQL Database Servers On Debian 8 With ISPConfig 3.1, we need the command "hostname" return web1 (mail1, db1, etc) and "hostname -f" return web1.domainA.com, web1.domainB.com, etc

This is my issue.

 

OK, i will try it.
Thanks,