Since 2.10.0. Show the current mode of an instance (writable or read-only). Contains
nilif the instance is in writable mode. When the field is not
nil, reports the reason why the instance is read-only.
Possible error reasons:
election– the instance is not the leader. That is,
off. See box.info.election for details.
synchro– the instance is not the owner of the synchronous transaction queue. For details, see box.info.synchro.
config– the server instance is in read-only mode. That is, box.cfg.read_only is
orphan– the instance is in
orphanstate. For details, see the orphan status page.
tarantool> box.info.ro_reason --- - null ...