ceph 集群故障恢复

Posted 2021-02-12 fengjian2016

集群规划配置

master1    172.16.230.21
master2    172.16.230.22
master3　 172.16.230.23
node1　　172.16.230.26
node2　　172.16.230.27
node3　　172.16.23028

 

一、 模拟monitor 宕机状态

2. 测试删除monitor节点， 把master3 关机

 

 发现 master3 节点已经宕机， 具体操作步骤，需要删除配置文件中master3 信息，同步ceph.conf 配置文件 ,然后命令删除master3

3. 修改ceph.conf 配置文件，删除 monitor3信息

[[email protected] cluster-ceph]# cd /opt/cluster-ceph/

[global]
fsid = 574c4cb4-50f8-4d80-a61e-25eadd0c567d
mon_initial_members = master1, master2
mon_host = 172.16.230.21,172.16.230.22
auth_cluster_required = cephx
auth_service_required = cephx
auth_client_required = cephx
public_network = 172.16.230.0/24
osd_pool_default_size = 2
mon_pg_warn_max_per_osd = 1000
osd pool default pg num = 256
osd pool default pgp num = 256
mon clock drift allowed = 2
mon clock drift warn backoff = 30

# 删除 mon_initial_members  中的master3 和 mon_host 中 172.16.230.23 

 

4 . ceph.conf 同步到其他节点

 ceph-deploy  --overwrite-conf  admin master1  master2  node1 node2 node3

 

 5. 使用remove命令 删除节点

[[email protected] cluster-ceph]# ceph mon remove master3
removing mon.master3 at 172.16.230.23:6789/0, there will be 2 monitors

 

6.  查看ceph集群状态 

 

 二.添加monitor3 到ceph集群中(ceph-deploy)

[[email protected] cluster-ceph]# cd /opt/cluster-ceph/
[[email protected] cluster-ceph]# ceph-deploy mon create  master3

 

同步ceph.conf 到集群各个节点

 ceph-deploy  --overwrite-conf  admin master1  master2  node1 node2 node3

 

查看集群状态

 

 

 

 

 

 

 

 

 

参考 https://www.bookstack.cn/read/ceph-handbook/Operation-add_rm_mon.md