執行：
ceph-deploy mon create-initial
報錯：
[ceph_deploy][ERROR ] KeyNotFoundError: Could not find keyring file: /etc/ceph/ceph.client.admin.keyring on host node1
[ceph_deploy][ERROR ] KeyNotFoundError: Could not find keyring file: /etc/ceph/ceph.client.admin.keyring on host node2
[ceph_deploy][ERROR ] KeyNotFoundError: Could not find keyring file: /etc/ceph/ceph.client.admin.keyring on host node3
解決：
ceph auth get-or-create client.admin mon ‘allow *’ mds ‘allow *’ osd ‘allow *’ –o /etc/ceph/ceph.client.admin.keyring
或者
ceph-create-keys --id node1
ceph-create-keys --id node2
ceph-create-keys --id node3
報錯2：
[ceph_deploy.mon][ERROR]Some monitors have still not reached quorum:
[ceph_deploy.mon][ERROR]node1
解決：
暫時解決不了，從頭來過就搞定了報錯3：
-------------------------------------------------------------------------------------
執行：rbd list
報錯3：
2018-08-19 10:31:08.047481 7f1f6c1d7700 0 -- 192.168.4.1:0/3336722177 >> 192.168.4.2:6804/9634 pipe(0x55db04d46b20 sd=4 :0 s=1 pgs=0 cs=0 l=1 c=0x55db04d45db0).fault
排錯：
[root@node1 ceph-cluster]# ll /dev/vdb{1,2}
brw-rw----. 1 root disk 252, 17 Aug 19 10:24 /dev/vdb1
brw-rw----. 1 root disk 252, 18 Aug 19 10:24 /dev/vdb2
問題所在：/dev/vdb1 /dev/vdb2 所有者不是ceph
解決：
[root@node1 ceph-cluster]# ll /dev/vdb{1,2}
brw-rw----. 1 ceph ceph 252, 17 Aug 19 10:24 /dev/vdb1
brw-rw----. 1 ceph ceph 252, 18 Aug 19 10:24 /dev/vdb2
chown ceph.ceph /dev/vdb{1,2}
[root@node1 ceph-cluster]# ll /dev/vdb{1,2}
brw-rw----. 1 ceph ceph 252, 17 Aug 19 10:24 /dev/vdb1
brw-rw----. 1 ceph ceph 252, 18 Aug 19 10:24 /dev/vdb2
[root@node1 ceph-cluster]# ceph-deploy osd activate node1:/dev/vdc1 node1:/dev/vdd1
[root@node1 ceph-cluster]# ceph-deploy osd activate node2:/dev/vdc1 node2:/dev/vdd1
[root@node1 ceph-cluster]# ceph-deploy osd activate node3:/dev/vdc1 node3:/dev/vdd1