Hi,
RHOS 16.1 setups, edge with cinder A/A cluster with 3 nodes.

When stopping one of the services tripleo_cinder_volume.service on the cluster, cinder knows to direct the create action to others (active)

In case we drop the traffic from cluster node , cinder service is still up and running (in cinder service-list) and cinder create action stuck forever on "create"

(central) [stack@site-undercloud-0 ~]$ cinder list
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How to reproduce :
#1 go to one of the cinder cluster node.
#2 block traffic with iptables.

/sbin/iptables -I OUTPUT 1 -p tcp --sport 6800:7300 -j DROP
/sbin/iptables -I OUTPUT 2 -p tcp --dport 6800:7300 -j DROP

#3 Turn the service to stop on the other nodes tripleo_cinder_volume.service

#4 try to create a volume --> Stuck on creating.....