Non-Standard GTM/ LTM failover Query
We currently have a dual data centre deployment of Approx 200 Terminal Servers which are are configured in a standard fashion.
By this I mean we have: -
1. Several Virtual Servers on the LTMs accepting client connections
2.GTM redirects end user connections to a virtual server based on the DNS Name
2. Each virtual server has one or more pools of terminal servers.
3. each end user is redirected to the appropriate pool member based on the default pool or Irule.
4. GTM is used to automate the failover between a standby data centre.
We are currently working on a a VMWare based solution. Due to the application requirements we will now need to send end user connections to a specific server. So in effect we will have the following: -
1. The Number of Terminal Servers will increase dramatically from hundreds to thousands.
2. There will be no need for pools as there will now be a one-one mapping between external IP address and terminal server.
3. We will still need to failover the connections en masse. All the Servers will still have the same dependencies (storage, Data centre etc).
It should be possible to address this issue by creating thousands of virtual servers and pools (with a single member in each), But is there a better way of doing this?
For Example, could I use a Network Virtual server and redirect the connections to a node based on the last octet perhaps using an Irule? What I am trying to avoid is creating thousands of Virtual servers without any clear benefit. I would still need to monitor the virtual server availability, so I could trigger an automatic failover using GTM.
Hopefully this makes sense, any thoughts?