7.5.1 配置image属性

在需要备份的主集群上操作

image需要两个属性：exclusive-lock 和 journaling

有三种方法可以配置：

1、在ceph.conf中添加

rbd default features = 125

2、在创建image的时候加上

rbd create <image-name> --size <megabytes> --pool <pool-name> --imagefeature <feature>

例：

rbd create image-1 --size 1024 --pool rbd --image-feature exclusive-lock,journaling

3、对已创建的image开启属性

rbd feature enable <pool-name>/<image-name> <feature-name>

例：

rbd feature enable rbd/image-1 exclusive-lock
rbd feature enable rbd/image-1 journaling

7.5.2 配置文件和密钥文件

在主集群上

cp /etc/ceph/ceph.conf /etc/ceph/local.conf
cp /etc/ceph/ceph.client.admin.keyring /etc/ceph/local.client.admin.keyring
scp ceph0:/etc/ceph/ceph.conf /etc/ceph/remote.conf
scp ceph0:/etc/ceph/ceph.client.admin.keyring /etc/ceph/remote.client.admin.keyring

在备集群上

cp /etc/ceph/ceph.conf /etc/ceph/remote.conf
cp /etc/ceph/ceph.client.admin.keyring /etc/ceph/remote.client.admin.keyring
scp ceph3:/etc/ceph/ceph.conf /etc/ceph/local.conf
scp ceph3:/etc/ceph/ceph.client.admin.keyring /etc/ceph/local.client.admin.keyring

在主备集群上设置权限

chown ceph:ceph -R /etc/ceph

检查设置是否完成

[root@ansible-0 ~]# ceph --cluster local mon stat
e3: 3 mons at {ansible-0=172.20.2.158:6789/0,ansible-1=172.20.2.161:6789/0,ansible-2=172.20.2.160:6789/0}, election epoch 10, quorum 0,1,2 ansible-0,ansible-2,ansible-1
[root@ansible-0 ~]# ceph --cluster remote mon stat
e2: 3 mons at {ceph0=172.20.2.123:6789/0,ceph1=172.20.2.124:6789/0,ceph2=172.20.2.125:6789/0}, election epoch 6, quorum 0,1,2 ceph0,ceph1,ceph2

[root@ceph0 ~]# ceph --cluster local mon stat
e3: 3 mons at {ansible-0=172.20.2.158:6789/0,ansible-1=172.20.2.161:6789/0,ansible-2=172.20.2.160:6789/0}, election epoch 10, quorum 0,1,2 ansible-0,ansible-2,ansible-1
[root@ceph0 ~]# ceph --cluster remote mon stat
e2: 3 mons at {ceph0=172.20.2.123:6789/0,ceph1=172.20.2.124:6789/0,ceph2=172.20.2.125:6789/0}, election epoch 6, quorum 0,1,2 ceph0,ceph1,ceph2

此时两个集群可以通过local和remote进行通信