I've installed an 8 node cloud with openstack kolla ansible, with dual controllers.

It all works fine, until I stop and start it. (Which is related to my earlier question on stopping a cloud)

On boot, the mariadb/galera components dont seem to be able to start/sync.

I started the first controller and maria db log says: (from the previous shutdown)

2018-06-08 17:26:00 140662590556928 [Note] InnoDB: Online DDL : Completed
2018-06-08 20:12:08 140664414825216 [Note] /usr/libexec/mysqld: Normal shutdown

2018-06-08 20:12:08 140664414825216 [Note] WSREP: Stop replication
2018-06-08 20:12:08 140664414825216 [Note] WSREP: Closing send monitor...
2018-06-08 20:12:08 140664414825216 [Note] WSREP: Closed send monitor.
2018-06-08 20:12:11 140664414825216 [Note] WSREP: gcomm: terminating thread
2018-06-08 20:12:11 140664414825216 [Note] WSREP: gcomm: joining thread
2018-06-08 20:12:11 140664414825216 [Note] WSREP: gcomm: closing backend
2018-06-08 20:12:15 140664414825216 [Note] WSREP: (958d6a22, 'tcp://172.16.101.100:4567') turning message relay requesting on, nonlive peers: tcp://172.16.101.109:4567
2018-06-08 20:12:16 140664414825216 [Note] WSREP: (958d6a22, 'tcp://172.16.101.100:4567') reconnecting to 8361901d (tcp://172.16.101.109:4567), attempt 0
180611 08:44:29 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql/
180611 08:44:29 mysqld_safe WSREP: Running position recovery with --log_error='/var/lib/mysql//wsrep_recovery.zFLp3L' --pid-file='/var/lib/mysql//ctrl1.lab1.stack-recover.pid'
2018-06-11  8:44:29 139883731843264 [Note] /usr/libexec/mysqld (mysqld 10.1.20-MariaDB) starting as process 184 ...
180611 08:44:51 mysqld_safe WSREP: Recovered position 6f86c600-6b10-11e8-97f6-9b647609adad:43931
2018-06-11  8:44:52 140457847679168 [Note] /usr/libexec/mysqld (mysqld 10.1.20-MariaDB) starting as process 220 ...
2018-06-11  8:44:52 140457847679168 [Note] WSREP: Read nil XID from storage engines, skipping position init
2018-06-11  8:44:52 140457847679168 [Note] WSREP: wsrep_load(): loading provider library '/usr/lib64/galera/libgalera_smm.so'
2018-06-11  8:44:52 140457847679168 [Note] WSREP: wsrep_load(): Galera 3.16(r5c765eb) by Codership Oy <info@codership.com> loaded successfully.
2018-06-11  8:44:52 140457847679168 [Note] WSREP: CRC-32C: using "slicing-by-8" algorithm.
2018-06-11  8:44:52 140457847679168 [Note] WSREP: Found saved state: 6f86c600-6b10-11e8-97f6-9b647609adad:-1
2018-06-11  8:44:52 140457847679168 [Note] WSREP: Passing config to GCS: base_dir = /var/lib/mysql/; base_host = 172.16.101.100; base_port = 4567; cert.log_conflicts = no; debug = no; evs.auto_evict = 0; evs.delay_margin = PT1S; evs.delayed_keep_period = PT30S; evs.inactive_check_period = PT0.5S; evs.inactive_timeout = PT15S; evs.join_retrans_period = PT1S; evs.max_install_timeouts = 3; evs.send_window = 4; evs.stats_report_period = PT1M; evs.suspect_timeout = PT5S; evs.user_send_window = 2; evs.view_forget_timeout = PT24H; gcache.dir = /var/lib/mysql/; gcache.keep_pages_size = 0; gcache.mem_size = 0; gcache.name = /var/lib/mysql//galera.cache; gcache.page_size = 128M; gcache.size = 128M; gcomm.thread_prio = ; gcs.fc_debug = 0; gcs.fc_factor = 1.0; gcs.fc_limit = 16; gcs.fc_master_slave = no; gcs.max_packet_size = 64500; gcs.max_throttle = 0.25; gcs.recv_q_hard_limit = 9223372036854775807; gcs.recv_q_soft_limit = 0.25; gcs.sync_donor = no; gmcast.listen_addr = tcp://172.16.101.100:4567; gmcast.segment = 0; gmcast.version = 0; ist.recv_addr = 172.16.1
2018-06-11  8:44:52 140457752131328 [Note] WSREP: Service thread ...