Prevents unnecessarily excessive timeouts if IPMI connections time out;
before, would have to go through 3 timed out commands at ~20s each
before failure was registered; reduced to 1 if the first times out.
If the VM is not in a stop state, failing to free the lock is now
considered a fatal error and will put the domain into fail state,
aborting the start. This is better than being unsafe or trying to start
a VM which will fail to boot due to read-only volumes.
Should correct issues on cold start as well as if a VM crashes
uncleanly, which would prevent the VM from starting due to stale RBD
locks.
This implementation has four parts:
1. Update how IP addresses are handled, specifically by replacing all
previous instances of "vni_ipaddr" with "vni_floatingipaddr", and then
adding the "vni_ipaddr" with the real data for this node's IPs. Also
include the storage IPs in this where they weren't before, so each
this_node actually has the local IPs plus floating IPs. This enables
the next two steps.
2. Modify flush_locks to take this_node as an argument, and update the
run_command function to only operate against this node, rather than on
the primary coordinator.
3. Have the flush_locks check each lock against the current node, to
verify that the lock is actually held by the current node. This is the
only way to do this safely. During fencing, we override this by not
passing a this_node which bypasses this check.
4. Have the VM start do the check for VM failure/startup and execute a
flush_locks before actually starting the VM.
Instead of each node uploading its own OSD stats, which would not work
if the PVC daemon wasn't running, instead have the primary upload stats
for all OSDs in the cluster.
Joshua Boniface