Ceph添加/删除Mon（ceph.conf）

操作环境

ceph 0.87.7

Openstack liberty

ubuntu 14.04 

当前ceph配置文件如下

[global]
fsid = c010eb34-ccc6-458d-9a03-faccff8991a7
mon_initial_members = controller, computer-1, computer-2
mon_host = 2.2.2.14,2.2.2.11,2.2.2.12
auth_cluster_required = cephx
auth_service_required = cephx
auth_client_required = cephx
filestore_xattr_use_omap = true
mon_pg_warn_max_per_osd = 1000

操作步骤

添加Mon

1.查看当前mon节点

root@computer-1# ceph mon stat
e3: 3 mons at {computer-1=2.2.2.11:6789/0,computer-2=2.2.2.12:6789/0,controller=2.2.2.14:6789/0}, election epoch 82, quorum 0,1,2 computer-1,computer-2

我之前的是3个，这里一个mon节点出故障了，不能参加投票，这里从新添加进去到集群里

 

3.获取mon的keyring

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

exported keyring for mon.

4.获取mon的map

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

5.初始化mon.gamma节点的数据目录

 

root@controller# ceph-mon -i controller --mkfs --monmap /tmp/mapfile --keyring /tmp/keyring  
ceph-mon: set fsid to c010eb34-ccc6-458d-9a03-faccff8991a7
ceph-mon: created monfs at /var/lib/ceph/mon/ceph-controller for mon.controller6.添加mon.gamma节点至ceph cluster中

6.添加mon.gamma节点至ceph cluster中

root@controller:/tmp# ceph mon add controller 2.2.2.14:6789
added mon.controller at 2.2.2.14:6789/0

 

7.启动mon.controller

root@controller:/tmp# ceph-mon -i controller --public-addr 2.2.2.14:6789

 

8.查看当前mon节点

root@controller# ceph mon stat
e3: 3 mons at {computer-1=2.2.2.11:6789/0,computer-2=2.2.2.12:6789/0,controller=2.2.2.14:6789/0}, election epoch 82, quorum 0,1,2 computer-1,computer-2,controller  

可以看出controller已经参加投票了，哈哈。大功告成

删除Mon

1.查看当前mon节点

[root@mon1 ~]# ceph mon stat
e2: 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 gamma
removed 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 stat
e3: 2 mons at {alpha=10.10.200.3:6789/0,beta=10.10.200.4:6789/0}, election epoch 88, quorum 0,1 alpha,b