服务器重启后，openstack重新聚合，FAILED - RETRYING: Wait for slave MariaDB (10 retries left).

没有按正常的顺序关闭物理机，重新进行openstack聚合时，mariadb一直处于退出状态，查看日志文件，报错如下

gcs/src/gcs_group.cpp:group_post_state_exchange():321: Reversing history: 186130184 -> 174560827, this member has applied 11569357 more events than the primary component.Data loss is possible. Aborting

需要在启动不了的节点上删除 /var/lib/volumes/mariadb/grastate.dat 文件 ，然后重新聚合，即可成功。