I’d like to share a brainstorm with the experts about how to produce a 100% uptime and redundant VMware infrastructure.
What I am currently working with is 2 VMware controller servers and they are presented with 2 iSCSI targets which are actually Linux DRBD configured systems to act as SANS with real time replication of the data between the targets.
If a controller fails, things are fine, if a iSCSI target fails yet again ok, but what if… in the event of a disaster both iSCSI targets failed, something went terribly wrong.
Now all together I am not against the idea of totally ditching DRBD for a specific instance where 100% uptime really means what it serves but given the fact it’s working well, what would we recommend as a tertiary form of redundancy to provide an instant or if not instant fast as possible turn around recovery mode for the iSCSI targets to get the virtual machines back online.
I look forward to hearing responses, have a great day all.