一.环境准备
系统环境
CentOS release 6.3 (Final)
内核信息
2.6.32-279.el6.x86_64
ip地址
vip 192.168.64.120
master 192.168.64.132 心跳线：10.0.0.1 主机名:DBmaster.test
slave 192.168.64.135 心跳线：10.0.0.2 主机名:DBbak.test
镜像磁盘
master /dev/sdc
slave /dev/sdc
fdisk -l
安装依赖环境
yum -y install gcc gcc-c++ make glibcflex kernel kernel-devel kernel-headers
下载安装包
wget http://oss.linbit.com/drbd/8.4/drbd-8.4.3.tar.gz
二.安装配置
安装：
ls
tar zxfdrbd-8.4.3.tar.gz
ls
cd drbd-8.4.3
./configure--prefix=/usr/local/drbd --with-km
ls/usr/src/kernels/2.6.32-431.5.1.el6.x86_64
ls/usr/src/kernels/
uname -r
makeKDIR=/usr/src/kernels/2.6.32-431.5.1.el6.x86_64
echo $?
make install
echo $?
添加开机启动
cp/usr/local/drbd/etc/rc.d/init.d/drbd /etc/rc.d/init.d
chkconfig --adddrbd
chkconfig drbdon
加载DRBD模块
depmod
modprobe drbd
modprobe drbd
加载DRBD模块报错
[root@mantisdrbd-8.4.3]# depmod
[root@mantisdrbd-8.4.3]# modprobe drbd
FATAL: Moduledrbd not found.
报错：FATAL: Module drbd not found. 内核不支持，更新内核，然后重启
查看模块是否加载到内核
[root@mantis ~]#lsmod |grep drbd
drbd 325658 0
libcrc32c 1246 1 drbd
安装成功后系统会有drbd的命令
/sbin/dr
dracut drbdadm drbdmeta drbdsetup
主配置文件
cat>>/usr/local/drbd/etc/drbd.conf <<EOF
# You can findan example in /usr/share/doc/drbd.../drbd.conf.example
include"drbd.d/global_common.conf";
include"drbd.d/*.res";
EOF
全局配置文件
cp/usr/local/drbd/etc/drbd.d/global_common.conf/usr/local/drbd/etc/drbd.d/global_common.conf.bk
>/usr/local/drbd/etc/drbd.d/global_common.conf
cat>>/usr/local/drbd/etc/drbd.d/global_common.conf <<EOF
global {
usage-count no;
# minor-count dialog-refreshdisable-ip-verification
}
common {
protocol C;
startup {
wfc-timeout 120;
degr-wfc-timeout 120;
}
disk {
on-io-error detach;
fencing resource-only;
}
net {
cram-hmac-alg "sha1";
shared-secret "mydrbdlab";
}
syncer {
rate 100M;
}
}
EOF
资源配置文件
cat>>/usr/local/drbd/etc/drbd.d/mysql.res <<EOF
resource mysql {
on DBmaster.test {
device /dev/drbd0;
disk /dev/sdc1;
address 10.0.0.1:7789;
meta-disk internal;
}
on DBbak.test {
device /dev/drbd0;
disk /dev/sdc1;
address 10.0.0.2:7789;
meta-disk internal;
}
}
EOF
drbd设备创建
[root@DBmasterdrbd.d]# mknod /dev/drbd0 b 147 0
[root@DBmasterdrbd.d]# drbdadm create-md mysql
报错:
‘mysql‘ not defined in your config (forthis host).
网上说报错4：‘drbd‘ notdefined in your config (for this host). 这个因为没有加载到drbd模块
解决：需要指定/etc/hosts里面主机
正常:
[root@DBmaster drbd.d]# drbdadmcreate-md my1
Writing meta data...
initializing activity log
NOT initializing bitmap
New drbd meta data block successfullycreated.
[root@DBbak drbd.d]# drbdadm create-mdmy1
Writing meta data...
initializing activity log
NOT initializing bitmap
New drbd meta data block successfullycreated.
启动drbd
/usr/local/drbd/etc/rc.d/init.d/drbdstart
cp/usr/local/drbd/etc/rc.d/init.d/drbd /etc/init.d/
chkconfig adddrbd
[root@DBmasterdrbd.d]# ps -ef|grep drbd
root 13262 2 0 13:46 ? 00:00:00 [drbd-reissue]
root 13600 2 0 15:42 ? 00:00:00 [drbd_submit]
root 13604 2 0 15:42 ? 00:00:00 [drbd_w_my1]
root 13614 2 0 15:42 ? 00:00:00 [drbd_r_my1]
root 13621 2 0 15:42 ? 00:00:00 [drbd_a_my1]
root 13625 2384 0 15:43 pts/1 00:00:00 grep drbd
查看状态
[root@DBmasterdrbd.d]# /usr/local/drbd/etc/rc.d/init.d/drbd status
drbd driverloaded OK; device status:
version: 8.4.3(api:1/proto:86-101)
GIT-hash:89a294209144b68adb3ee85a73221f964d3ee515 build by root@DBmaster.test,2014-05-09 13:43:20
m:res cs ro ds p mounted fstype
0:my1 Connected Secondary/Secondary Inconsistent/Inconsistent C
[root@DBmasterdrbd.d]# cat /proc/drbd
version: 8.4.3(api:1/proto:86-101)
GIT-hash:89a294209144b68adb3ee85a73221f964d3ee515 build by root@DBmaster.test,2014-05-09 13:43:20
0: cs:Connected ro:Secondary/Secondaryds:Inconsistent/Inconsistent C r-----
ns:0 nr:0 dw:0 dr:0 al:0 bm:0 lo:0 pe:0ua:0 ap:0 ep:1 wo:f oos:5236960
[root@DBmasterdrbd.d]#
主节点的设置（primary）
drbdsetupprimary /dev/drbd0 --force 配置为主节点
挂载设备（primary）
说明：挂载DRBD分区之前，首先确认当前主机的DRBD分区是primary状态，可以通过cat /proc/drdb命令中查询状态。
创建文件系统（primary）
mkfs.ext4/dev/drbd0
挂载设备（primary）
mount/dev/drbd0 /data --->DBdata
测试
[root@DBmasterdata]# touch {1..9}
卸载降级
[root@DBmaster~]# umount /data
[root@DBmaster~]# drbdsetup /dev/drbd0 secondary
升级，然后挂载，查看
[root@DBbakdata]# drbdsetup /dev/drbd0 primary
[root@DBbakdata]# mount /dev/drbd0 /data
[root@DBbakdata]# ls
[root@DBbakdata]# cd /data/
[root@DBbakdata]# ls
1 2 3 4 5 6 7 8 9 abc lost+found rzsz-3.48.tar.gz
三.配置文件说明
以上相关配置文件说明：
cat /etc/drbd.d/global_common.conf
global {
usage-count no; #?取消drbd使用者统计
# minor-count dialog-refresh disable-ip-verification
}
common {
protocol C; #?选择drbd的C协议
startup { #?启动延时配置
wfc-timeout 120;
degr-wfc-timeout 120;
}
disk { #?fence防脑裂
on-io-error detach;
fencing resource-only;
}
net {
cram-hmac-alg "sha1";#?主备节点使用的通信算法
shared-secret "mydrbdlab";
}
syncer {
rate 100M; #?同步速率，视带宽而定
}
}
cat /etc/drbd.d/web.res
resource web { #?web为资源名
on master-nfs { #?master-nfs为节点名称
device /dev/drbd0; #?定义虚拟设备
disk /dev/sdb1; #?指定真实设备
address 192.168.2.1:7789; #?监听自身IP端口
meta-disk internal;
}
on slave-nfs {
device /dev/drbd0;
disk /dev/sdb1;
address 192.168.2.2:7789;
meta-disk internal;
}
}
EOF
本文出自 “小盒” 博客，请务必保留此出处http://zhangxiaohe.blog.51cto.com/7821029/1409978