Ceph添加/删除Mon（ceph.conf）

操作环境

ceph 0.87.7

Openstack icehouse

Centos 6.5 x86_64

当前ceph配置文件如下

[global]    pid file                   = /var/run/ceph/$name.pid    auth cluster required      = cephx    auth service required      = cephx    auth client required       = cephx    keyring                  = /etc/ceph/keyring.admin[mon]    mon data                   = /mon    mon clock drift allowed    = .25[mon.alpha]    host                       = mon1     mon addr                   = 10.10.200.3:6789[mon.beta]    host                       = mon2    mon addr                   = 10.10.200.4:6789[mds][osd]osd data                     = /osd/$nameosd mkfs type = xfs osd journal                  = /osd/$name/journalkeyring = /etc/ceph/keyring.$nameosd crush update on start = false[osd.0]    host                         = osd1    devs                         = /dev/vdb[osd.1]    host                         = osd2     devs                         = /dev/vdb[osd.2]    host                         = osd3     devs                         = /dev/vdb[osd.3]    host                         = osd4     devs                         = /dev/vdb[osd.4]    host                         = osd5    devs                         = /dev/vdb[osd.5]    host                         = osd6    devs                         = /dev/vdb

操作步骤

添加Mon

1.查看当前mon节点

[root@mon1 ~]# ceph mon state3: 2 mons at {alpha=10.10.200.3:6789/0,beta=10.10.200.4:6789/0}, election epoch 88, quorum 0,1 alpha,beta

2.例如添加mon.gamma节点，首先在ceph.conf添加mon.gamma配置

[mon.gamma]    host                       = mon3     mon addr                   = 10.10.200.10:6789

3.获取mon的keyring

[root@mon1 ~]# ceph auth get mon. -o /tmp/keyringexported keyring for mon.

4.获取mon的map

[root@mon1 ~]# ceph mon getmap -o /tmp/mapfilegot monmap epoch 3

5.初始化mon.gamma节点的数据目录

[root@mon1 ~]# ceph-mon -i gamma --mkfs --monmap /tmp/mapfile --keyring /tmp/keyring ceph-mon: created monfs at /mon for mon.gamma

6.添加mon.gamma节点至ceph cluster中

[<a target=_blank href="mailto:root@mon3">root@mon3</a> ~]# ceph mon add gamma 10.10.200.10:6789added mon.gamma at 10.10.200.10:6789/0

7.启动mon.gamma

root@mon3 ~]# ceph-mon -i gamma --public-addr 10.10.200.10:6789

8.查看当前mon节点

[root@mon1 ~]# ceph mon state4: 3 mons at {alpha=10.10.200.3:6789/0,beta=10.10.200.4:6789/0,gamma=10.10.200.10:6789/0}, election epoch 94, quorum 0,1,2 alpha,beta,gamma

删除Mon

1.查看当前mon节点

[root@mon1 ~]# ceph mon state2: 3 mons at {alpha=10.10.200.3:6789/0,beta=10.10.200.4:6789/0,gamma=10.10.200.10:6789/0}, election epoch 84, quorum 0,1,2 alpha,beta,gamma

2.例如删除mon.gamma节点，首先停止mon.gamma节点

[root@mon1 ~]# /etc/init.d/ceph -a stop mon.gamma=== mon.gamma === Stopping Ceph mon.gamma on mon3...kill 1576...done

3.将mon.gamma节点从ceph cluster中删除掉

[root@mon1 ~]# ceph mon remove gammaremoved mon.gamma at 10.10.200.10:6789/0, there are now 2 monitors

4.在ceph.conf配置文件中删除mon.gamma字段

5.查看当前mon节点

[root@mon1 ~]# ceph mon state3: 2 mons at {alpha=10.10.200.3:6789/0,beta=10.10.200.4:6789/0}, election epoch 88, quorum 0,1 alpha,beta