ha-all-exchanges-only

root@node-1:~# rabbitmqctl list_queues name policy | grep cinder-scheduler_fanout
cinder-scheduler_fanout_73a24f26bba043c885e9c191e10e3662
root@node-1:~# rabbitmqctl list_exchanges name policy | grep cinder-scheduler_fanout
cinder-scheduler_fanout

(set ha-all for an exchange only)
root@node-1:~# rabbitmqctl set_policy ha-all "cinder-scheduler_fanout" '{"ha-mode":"exactly", "ha-params":5, "ha-sync-mode":"automatic"}'
Setting policy "ha-all" for pattern "cinder-scheduler_fanout" to "{\"ha-mode\":\"exactly\", \"ha-params\":5, \"ha-sync-mode\":\"automatic\"}" with priority "0" ...
root@node-1:~# rabbitmqctl list_exchanges name policy | grep cinder-scheduler_fanout
cinder-scheduler_fanout	ha-all

(but it was set ha-all to related queue as well)
root@node-1:~# rabbitmqctl list_queues name policy | grep cinder-scheduler_fanout
cinder-scheduler_fanout_73a24f26bba043c885e9c191e10e3662	ha-all

(unset for a queue-only)
root@node-1:~# rabbitmqctl set_policy ha-none "cinder-scheduler_fanout_73a24f26bba043c885e9c191e10e3662" '{"ha-mode":"exactly", "ha-params":5, "ha-sync-mode":"automatic"}'
Setting policy "ha-none" for pattern "cinder-scheduler_fanout_73a24f26bba043c885e9c191e10e3662" to "{\"ha-mode\":\"exactly\", \"ha-params\":5, \"ha-sync-mode\":\"automatic\"}" with priority "0" ...
root@node-1:~# rabbitmqctl list_queues name policy | grep cinder-scheduler_fanout
cinder-scheduler_fanout_73a24f26bba043c885e9c191e10e3662	ha-none
root@node-1:~# rabbitmqctl list_exchanges name policy | grep cinder-scheduler_fanout
cinder-scheduler_fanout	ha-all
(now we have only the exchange to be synced across nodes)