1、涉及机器

192.168.60.11 node1.ha.com

192.168.60.12 node2.ha.com


2、新增硬盘用于DRBD

ls /sys/class/scsi_host/

echo "- - -" > /sys/class/scsi_host/host0/scan

echo "- - -" > /sys/class/scsi_host/host1/scan

echo "- - -" > /sys/class/scsi_host/host2/scan


3、安装配置DRBD

wget ftp://rpmfind.net/linux/atrpms/el6-x86_64/atrpms/stable/drbd-8.4.3-33.el6.x86_64.rpm

wget ftp://rpmfind.net/linux/atrpms/el6-x86_64/atrpms/stable/drbd-kmdl-2.6.32-431.el6-8.4.3-33.el6.x86_64.rpm

rpm -ivh drbd-8.4.3-33.el6.x86_64.rpm drbd-kmdl-2.6.32-431.el6-8.4.3-33.el6.x86_64.rpm


grep -v ^# /etc/drbd.d/global_common.conf | grep -v .*#

global {

        usage-count no;

}


common {

        handlers {


                pri-on-incon-degr "/usr/lib/drbd/notify-pri-on-incon-degr.sh; /usr/lib/drbd/notify-emergency-reboot.sh; echo b > /proc/sysrq-trigger ; reboot -f";

                pri-lost-after-sb "/usr/lib/drbd/notify-pri-lost-after-sb.sh; /usr/lib/drbd/notify-emergency-reboot.sh; echo b > /proc/sysrq-trigger ; reboot -f";

                local-io-error "/usr/lib/drbd/notify-io-error.sh; /usr/lib/drbd/notify-emergency-shutdown.sh; echo o > /proc/sysrq-trigger ; halt -f";

        }


        startup {

        }


        options {

        }


        disk {

                on-io-error detach;

        }


        net {

                protocol C;

                cram-hmac-alg "sha1";

                shared-secret "drbdsecret";

        }


        syncer {

                rate 1000M;

        }

}


cat /etc/drbd.d/web.res

resource web {

  on node1.ha.com {

    device    /dev/drbd0;

    disk      /dev/sdb;

    address   192.168.60.11:7789;

    meta-disk internal;

  }

  on node2.ha.com {

    device    /dev/drbd0;

    disk      /dev/sdb;

    address   192.168.60.12:7789;

    meta-disk internal;

  }

}


cd /etc/drbd.d/

scp global_common.conf web.res [email protected]:/etc/drbd.d


4、初始化资源并启动服务、查看状态（所有节点都要执行）

drbdadm create-md web                 

/etc/init.d/drbd start


drbd-overview（cat /proc/drbd）

drbdadm primary --force web


drbd-overview

 0:web/0  SyncSource Primary/Secondary UpToDate/Inconsistent C r---n- 

       [>....................] sync'ed:  4.6% (4888/5116)M


5、在主节点上创建文件系统并挂载

mke2fs -t ext4 /dev/drbd0

mount /dev/drbd0 /mnt

cd /mnt/

cp /etc/fstab /mnt/


6、主备切换

需要先将主的切换到备的，才能将原来备的切换到主的


主的切换到备的

umount /mnt

drbdadm secondary web 

drbd-overview


备的切换到主的

drbdadm primary web

drbd-overview 

mount /dev/drbd0 /mnt/

ls /mnt


umount /mnt

drbdadm secondary web


chkconfig drbd off

service drbd stop