http://docs.linbit.com/docs/users-guide-9.0/#ch-pacemaker

安装说明：  - RHEL 7.4 (crhel71,crhel72)  - drbd 9.0.9-1  - 2台相同配置服务器，硬盘数量、大小相同  - 设定两节点间 ssh 免密登录  - 使用/etc/hosts 或者DNS，让两个节点能互相解析  - 设定 YUM repo, 指向到清华大学开源镜像服务器( https://mirrors.tuna.tsinghua.edu.cn/elrepo/elrepo/el7/x86_64 )  - 上述条件满足后，一条命令就完成安装      # yum -y install drbd90-utils kmod-drbd90

     下面主要讲解具体设定：

1. /etc/drbd.conf文件无需该动

2. /etc/drbd.d/global_common.conf，在common配置部分的net选项中添加protocol C;，表示使用协议C的方式进行数据复制

# sed -i "55a\                protocol C;" /etc/drbd.d/global_common.conf

# cat /etc/drbd.d/global_common.conf

... common {     net {protocol C;} }

3.该文件用于定义drbd镜像资源 # cat <<EOF> /etc/drbd.d/r0.res resource r0 {   protocol C;   disk /dev/sdb;   device /dev/drbd0;   meta-disk internal;

  syncer {

    verify-alg sha1;   }   net {     allow-two-primaries;   }

  on crhel71 {

    address 10.247.15.78:7789;   }   on crhel72 {     address 10.247.15.76:7789;   }

  disk {

    resync-rate 100M;     c-min-rate 10;     c-max-rate 400M;   } } EOF

4. 对节点的drbd操作, 在两个节点上都执行： Now that we have the configuration in place, it’s time to initialize our data: At this point, we’re ready to start DRBD on both nodes and bring the r0 resource up. After bringing the resource up, let’s check the status:

[root@crhel71 ~]# drbdadm up r0

initializing activity log initializing bitmap (672 KB) to all zero Writing meta data... New drbd meta data block successfully created. [root@crhel71 ~]# drbdadm status r0 role:Secondary   disk:Inconsistent   crhel72 role:Secondary     peer-disk:Inconsistent

[root@crhel72 ~]# drbdadm up r0

[root@crhel72 ~]# drbdadm status r0 role:Secondary   disk:Inconsistent   crhel71 role:Secondary     peer-disk:Inconsistent

5. 选定primary node, 并同步数据

>>在所有节点中， 选定1台作为primary node，执行下面命令，数据同步开始进行；让子弹飞一会，进度使用下面命令查询

[root@crhel71 ~]# drbdadm primary --force r0

[root@crhel71 ~]# drbdadm status

r0 role:Primary   disk:UpToDate   crhel72 role:Secondary     replication:SyncSource peer-disk:Inconsistent done:15.21

[root@crhel72 ~]# drbdadm status

r0 role:Secondary   disk:Inconsistent   crhel71 role:Primary     replication:SyncTarget peer-disk:UpToDate done:20.35

>>几分钟后，在各节点上查询状态，看到已经同步完成：

[root@crhel71 ~]# drbdadm status r0 role:Primary   disk:UpToDate   crhel72 role:Secondary     peer-disk:UpToDate

[root@crhel72 ~]# drbdadm status

r0 role:Secondary   disk:UpToDate   crhel71 role:Primary     peer-disk:UpToDate

6. 建立文件系统(do this on primary node) [root@crhel71 ~]# mkfs.xfs /dev/drbd0

7. 测试drbd镜像

[root@crhel71 ~]# mount /dev/drbd0 /mnt/

[root@crhel71 ~]# touch /mnt/file{1..5} [root@crhel71 ~]# drbd-overview ...  0:r0/0  Connected(2*) Primar/Second UpToDa/UpToDa /mnt xfs 21G 33M 21G 1% [root@crhel71 ~]# umount /mnt [root@crhel71 ~]# drbdadm secondary r0

[root@crhel72 ~]# drbdadm primary r0

[root@crhel72 ~]# mount /dev/drbd0 /mnt/ [root@crhel72 mnt]# ls file1 file2 file3 file4 file5