VMware FC failover to second target
Posted on 2011-04-28
I have a question about VMware ESXi 4.x and failover of fibrechannel from one target/storage processor to another.
We have an openfiler active/passive cluster and this setup works by one server taking over on shutdown/failure/etc. from the other.
We are using shared direct attached storage arrays that connect to both servers. When a server takes over it mounts all the appropriate filesystems and takes over a virtual IP. Consequently, all our iSCSI sessions failover to it.
With iSCSI this is very simple since we point to the virtual IP.
About a year back we began moving to fibrechannel because of speed and cost. (2G FC is much cheaper than 10GE and bonding of 1GE in VMware for iSCSI has been lackluster.)
While both target servers are setup and working, we are unsure how to have VMware failover to the other target server since both have different WWNs and only one server is presenting LUNs on startup.
I tried looking down the path of virtual WWNs (like with the virtual IP), but no luck there.