常用命令：
1.
ceph health
ceph -s
2.
ceph osd tree
ceph osd lspools
ceph osd pool [poolname] rbd pg_num
ceph osd pool set [poolname] pg_num [num]
3.
ceph mon dump #查看监视器运行图
ceph osd dump #查看osd集群图
ceph mds dump #查看元数据服务器运行图
4.
ceph-deploy --overwrite-conf admin node01 node02 node03 node04