Hello, I'm a begginer on that cluster stuff, so I ask you for help. I'm setting up a environment with virtual machines running upon Xen, two servers, and a SAN storage. I want to set up a very simple high-availability scenario, where once my master server goes down, slave creates again those virtual machines on it. (What would correspond to a restart of all machines, off course.) Ok, I could do that with Heartbeat, with a very simple configuration based on its version 1. It worked as expected. My problem now is related to SAN data access. I want to prevent data to be simultaneously mounted by both servers, in a situation when I don't have master server down, altough it could look like this. I'm connecting servers through a crossover UTP cable. If it get disconnected or any of those dedicated interfaces goes down, slave server would think that master server is down, and would recreate all my virtual machines, altough it isn't down, corrupting LVM and filesystem data. Alright, I have found out that I would have to use either HA-LVM or CLVMD. Actually, I think that HA-LVM would be more appropriate to me, accordingly to what I've seen around. But, I'm really not sure about that. What should I use, exactly? Does HA-LVM do what I want? Does it prevent LVM volumes from being mounted by more than a node simultaneously? I have thought about locking VGs on each server, with CLMD, but I'm not sure if it is the correct way for that. I can say for sure that I just need data access at one server at a time. What would be the simplest and more correct way for doing this? Thank you. -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
