构建NFS高可用环境：DRBD83与Heartbeat集成

debd版本：
    drbd83
1、hosts文件更改
node01：
root@cluster-node01:/etc/drbd.d$ more /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.0.152 cluster-node01
192.168.0.153 cluster-node02
node02：
root@cluster-node01:/etc/drbd.d$ more /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.0.152 cluster-node01
192.168.0.153 cluster-node02

2.在node01和node02创建一个新的磁盘分区 (本例为/dev/vdb1)：
Disk /dev/vdb: 107.4 GB, 107374182400 bytes
16 heads, 63 sectors/track, 208050 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xd52cf6e0
   Device Boot Start End Blocks Id System
/dev/vdb1 1 208050 104857168+ 83 Linux

 3 .下载 rdbd 软件包 （本例版本为drbd83，使用yum 安装drbd84 会缺少drbd模块不能加载 ）
rpm -Uvh http://www.elrepo.org/elrepo-release-6-6.el6.elrepo.noarch.rpm
安装以下软件包  yum install drbd83-utils kmod-drbd83 
4.配置drbd

root@cluster-node02:/root$ more /etc/drbd.conf
# You can find an example in /usr/share/doc/drbd.../drbd.conf.example

include "drbd.d/global_common.conf";
include "drbd.d/*.res";

root@cluster-node02:/root$ more /etc/drbd.d/global_common.conf
# DRBD is the result of over a decade of development by LINBIT.
# In case you need professional services for DRBD or have
# feature requests visit http://www.linbit.com

global {
usage-count yes;
}

common {
protocol C;
disk {
on-io-error detach;
no-disk-flushes;
no-md-flushes;
}

net {
cram-hmac-alg "sha1";
shared-secret "allendrbd";
sndbuf-size 512k;
max-buffers 8000;
unplug-watermark 1024;
max-epoch-size 8000;