Ceph添加/删除Mon（ceph.conf）

迈不过友情╰ 2022-08-13 12:57 430阅读 0赞

## 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