Stas Oskin wrote:
Hi.
The HA service (heartbeat) is running on Dom0, and when the primary
node is down, it basically just starts the VM on the other node. So
there not supposed to be any time issues.
Can you explain a bit more about your approach, how to automate it for example?
* You need to have something " a resource manager" keeping an eye on the
NN from somewhere. Needless to say, that needs to be fairly HA too.
* your NN image has to be ready to go
* when the deployed NA goes away, bring up a new machine with the same
image, hostname *and IP Address*. You can't always pull the latter off,
it depends on the infrastructure. Without that, you'd need to bring up
all the nodes with DNS caching set to a short time and update a DNS entry.
This isn't real HA, its recovery.
