Re: SSH failover

elwoodwang@xxxxxxxxx wrote:
Assume we have one cluster, Cluster, including two computers

Host_A: 192.168.6.4
Host_B: 192.168.6.5

Host_A and Host_B share a virutal IP address, 192.168.6.240. openssh
has been installed in both machines and ssh works perfectly with
Host_A, Host_B, and the Cluster:

ssh 192.168.6.4, works fine
ssh 192.168.6.5, works fine
ssh 192.168.6.240, works fine

My question is how to failover a ssh connection. For example, if there
is already a ssh connection to the cluster, ssh 192.168.6.240, and
suppose the Host_A is the acitvate one who servers the connection. In
case a failver over happens, the Host_B becomse active and take over
the connection. Since Host_B doesn't have the state information such
as in Host_A , the ssh connection to the cluster is reset and closed.
You have to re-establish the ssh connection due to the failover.

Is there any way to synchronize the two ssh server and make the ssh
failover seemlessly (e.g., Host_B can take over the ssh connection
without reset and close it)?

The ability to do this would be a *MAJOR* security issue. I don't think you can do it.

Any chance of using virtual servers on the far end to provide live migration from one server to another of the same active OS?
.

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