配置文件中添加osd模块

[osd]
        osd journal size = 1024
[osd.0]
        host = zw-vm-138

[osd.1]
        host = zw-vm-139

[osd.2]
        host = zw-vm-140

生成uuid作为osd ID

#uuidgen
e33dcfb0-31d5-4953-896d-007c7c295410

创建osd实例

ceph osd create e33dcfb0-31d5-4953-896d-007c7c295410

创建osd目录

mkdir -p /var/lib/ceph/osd/ceph-0

创建osd文件系统

ceph-osd -i 0 --mkfs --mkkey --osd-uuid e33dcfb0-31d5-4953-896d-007c7c295410

添加osd keyring 到集群认证数据库

ceph auth add osd.0 osd 'allow *' mon 'allow profile osd' -i /var/lib/ceph/osd/ceph-0/keyring

添加机器到CURSH map中

ceph osd crush add-bucket zw-vm-138 host
ceph osd crush move zw-vm-138 root=default

添加osd到map

ceph osd crush add osd.0 1.0 host=zw-vm-138

在每个节点重复以上步骤（注意修改对应id和主机名）

需要修改
-i {id}
osd.{id}
cphe-{id}
host={hostname}

完成后状态

# ceph osd tree
ID WEIGHT  TYPE NAME          UP/DOWN REWEIGHT PRIMARY-AFFINITY 
-1 3.00000 root default                                         
-2 1.00000     host zw-vm-138                                   
 0 1.00000         osd.0           up  1.00000          1.00000 
-3 1.00000     host zw-vm-139                                   
 1 1.00000         osd.1           up  1.00000          1.00000 
-4 1.00000     host zw-vm-140                                   
 2 1.00000         osd.2           up  1.00000          1.00000 

 # ceph -s
    cluster caefadfb-ad33-453f-be23-778fdbd0a892
     health HEALTH_OK
     monmap e1: 3 mons at {0=10.3.0.138:6789/0,1=10.3.0.139:6789/0,2=10.3.0.140:6789/0}
            election epoch 20, quorum 0,1,2 0,1,2
     osdmap e36: 3 osds: 3 up, 3 in
            flags sortbitwise
      pgmap v431: 164 pgs, 2 pools, 16 bytes data, 3 objects
            28914 MB used, 240 GB / 282 GB avail
                 164 active+clean

启动服务

ln -s /etc/init.d/ceph /etc/init.d/ceph-osd.0
rc-update add ceph-osd.0 default
/etc/init.d/ceph-osd.0 start