High Availability & Cloud Controller
I am in the middle of deciding weather or not to use openstack or openQRM and it all depends on how high availability is handled. So my question is as follows.
Does the cloud controller always need to be available? If it does need to be available, how can I accomplish this via heartbeat and drbd? I know how to make a pair of servers in an ha/drbd cluster and to put mysql on top of that, is that, plus nova being installed, all that is required?
If the Cloud controller doesn't need to be available always, what will my windows of repair time look like? Do I have until the next boot or reboot of a vm to fix a broken raid on a controller?
I hope my questions are just irrelevant and I hope there is a way openstack handles this gracefully if there are enough nodes to replicate the data, if thats the case, how many nodes will I need?
I'm trying to run just a general cloud to quick creation & deletion of customers vm plus the ability to host and ec2 style cloud with elastic capabilities.
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