ceph --admin-daemon /run/ceph/ceph-mon.IP.asok config show | grep full_ratio
2.查看当前集群full以及nearfull的设置值,在其他节点查询osd配置
ceph --admin-daemon /run/ceph/ceph-osd.0.asok config show | grep full
3.遇到集群full的告警，并且存储不能写入数据了，紧急配置步骤
1）设置OSD禁止读写
ceph osd pause
2）通知Mon修改nearfull及full的阈值
ceph tell mon.* injectargs "--mon-osd-nearfull-ratio 0.96"
ceph tell mon.* injectargs "--mon-osd-full-ratio 0.97"
ceph tell osd.* injectargs "--mon-osd-nearfull-ratio 0.96"
ceph tell osd.* injectargs "--mon-osd-full-ratio 0.97"
3）通知PG修改nearfull及full的阈值
ceph pg set_nearfull_ratio 0.96
ceph pg set_full_ratio 0.97
4）解除OSD的禁止读写
ceph osd unpause
5）整理集群，删除一些无用的数据，扩容集群
6）还原集群的默认配置
ceph tell mon.* injectargs "--mon-osd-nearfull-ratio 0.85"
ceph tell mon.* injectargs "--mon-osd-full-ratio 0.95"
ceph tell osd.* injectargs "--mon-osd-nearfull-ratio 0.85"
ceph tell osd.* injectargs "--mon-osd-full-ratio 0.95"
ceph pg set_nearfull_ratio 0.85
ceph pg set_full_ratio 0.95
原文：https://blog.51cto.com/anzhiruosu/2467444