Is loadbalancing over 2 or multiple HA-groups possible ?

Hi

You can do it easly.

- So you have only a single point of entry. 

Your virtual server listne in IP (listening service) : 192.168.1.1:443 (HTTPS)

your VS manage 2 sites: site1.domain.com and site2.domain.com.

- you create 2 Arecord with the same IP:

192.168.1.1 site1.domain.com

192.168.1.1 site2.domain.com

- Now you have to create 2 Pool:

Pool1: for site 1

- server1

- server2

- server3

Pool2: for site 2

- server4

- server5

- server6

- You have to create a LTM Policy in order to route request depending to hostname:

site1.domain.com --> pool1

site2.domain.com --> pool2

- And you can set this irule on your VS:

This Irule allow you to detect the number of remaining servers up

when CLIENT_ACCEPTED {
 
   Check if the VS default pool has no active members
 
  if {[active_members [LB::server pool]] == 1}{
 
		# redirect to a sorry page
 
    pool sorry_pool
 
  }
 
}

I hope I have correctly understood your request. it's the notion of a site that I have not really understood, but if you give me more details I could sketch out my explanation.

regards