Ceph添加/删除Mon（ceph.conf）

最新推荐文章于 2025-10-22 09:12:11 发布

原创最新推荐文章于 2025-10-22 09:12:11 发布 · 9.8k 阅读

2 ·

CC 4.0 BY-SA版权

ceph 专栏收录该内容

15 篇文章

订阅专栏

本文介绍如何在 Ceph 存储集群中添加和删除监控节点（Mon）。详细步骤包括配置文件修改、密钥获取、数据目录初始化等，并提供了具体的操作命令示例。

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/$name.pid
    auth cluster required      = cephx
    auth service required      = cephx
    auth client required       = cephx
    keyring                  = /etc/ceph/keyring.admin
[mon]
    mon data                   = /mon
    mon clock drift allowed    = .25
[mon.alpha]
    host                       = mon1 
    mon addr                   = 10.10.200.3:6789
[mon.beta]
    host                       = mon2
    mon addr                   = 10.10.200.4:6789
[mds]
[osd]
osd data                     = /osd/$name
osd mkfs type = xfs 
osd journal                  = /osd/$name/journal
keyring = /etc/ceph/keyring.$name
osd 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 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,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/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@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 10.10.200.10:6789
added 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 stat
e4: 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 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,beta