一、主机资源：
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| Name | IP | 配置 | 备注 |
| Master | 192.168.0.152 | sda/10G,sdb/10G； | |
| Slave | 192.168.0.153 | sda/10G,sdb/10G； |
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DRBD下载地址：http://oss.linbit.com/drbd/
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二、系统基本配置
master、slave都做如下配置。
1.配置/etc/hosts文件
~]# vi /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 192.168.0.152 master 192.168.0.153 slave
2.禁用selinux：
# sed -i "7s/enforcing/disabled/" /etc/selinux/config
3.禁用或卸载iptables，这里我们将iptables禁用：
1) 关闭防火墙-----service iptables stop
2)启动防火墙-----service iptables start
3)重启防火墙-----service iptables restart
4) 查看防火墙状态--service iptables status
5) 永久关闭防火墙--chkconfig iptables off
6) 永久关闭后启用--chkconfig iptables on
4.运行yum update升级内核：
# yum update Loaded plugins: fastestmirror, presto Loading mirror speeds from cached hostfile * base: mirrors.btte.NET ………
5.格式化/dev/sdb
#fdisk -l
#fdisk /dev/sdb
6.重启
reboot
三、安装DRBD 8.4.2（主备节点配置相同）
1.主备节点安装drbd编译环境：
# yum -y install gcc flex wget make kernel-devel kernel-headers Git libxslt rpm-build automake autoconf
2.下载DRBD安装文件
# wget http://oss.linbit.com/drbd/8.4/drbd-8.4.2.tar.gz
3.解压并安装DRBD文件
#tar -zvxf drbd-8.4.2.tar.gz # cd drbd-8.4.2 drbd-8.4.2]# ./configure --prefix=/usr/local/drbd --with-km drbd-8.4.2]# make KDIR=/usr/src/kernels/`uname -r`/ drbd-8.4.2]# make install
4.安装配置DRBD驱动模块
drbd-8.4.2]# cd drbd drbd-8.4.2]# make clean drbd-8.4.2]# make KDIR=/usr/src/kernels/`uname -r`/ drbd-8.4.2]# cp drbd.ko /lib/modules/`uname -r`/kernel/lib/ drbd-8.4.2]# depmod #创建模块依赖关系的列表 drbd-8.4.2]# cp /usr/local/drbd/etc/rc.d/init.d/drbd /etc/rc.d/init.d/ drbd-8.4.2]# chkconfig --add drbd drbd-8.4.2]# chkconfig drbd on
四、定义DRBD 配置文件 （主备节点配置相同）
~]# cp /usr/local/drbd/etc/drbd.d/global_common.conf /usr/local/drbd/etc/drbd.d/global_common-bak.conf ~]# vi /usr/local/drbd/etc/drbd.d/global_common.conf
global {
usage-count yes; # 是否参加DRBD使用者统计.默认是yes
# minor-count dialog-refresh disable-ip-verification
}
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 {
wfc-timeout 30;
degr-wfc-timeout 30;
outdated-wfc-timeout 30;
}
options {
# cpu-mask on-no-data-accessible
}
disk {
on-io-error detach;
fencing resource-and-stonith;
resync-rate 50M; # 设置主备节点同步时的网络速率最大值,单位是字节.
}
net {
protocol C; # 使用协议C.表示收到远程主机的写入确认后,则认为写入完成.
cram-hmac-alg sha1; # 设置主备机之间通信使用的信息算法.
shared-secret "123456";
}
}~]# vi /usr/local/drbd/etc/drbd.d/Redis.res
resource redis{
on master {
device /dev/drbd1; #逻辑设备的路径
disk /dev/sdb; #物理设备
address 192.168.0.152:7788; #IP和监听端口
meta-disk internal;
}
on slave {
device /dev/drbd1;
disk /dev/sdb;
address 192.168.0.153:7788;
meta-disk internal;
}
}~]# modprobe drbd #载入DRBD模块 ~]# lsmod |grep drbd #确认DRBD模块载入成功
drbd 314184 0 libcrc32c 1241246 1 drbd
~]# drbdadm create-md redis #创建元数据
--== Thank you for participating in the global usage survey ==-- The server's response is: you are the 4070th user to install this version md_offset 10737414144 al_offset 10737381376 bm_offset 10737053696 Found some data ==> This might destroy existing data! <== Do you want to proceed? [need to type 'yes' to confirm] yes Writing meta data... initializing activity log NOT initializing bitmap New drbd meta data block successfully created. success
~]# mkdir -p /usr/local/drbd/var/run/drbd ~]# drbdadm up redis #启用资源
Device '1' is configured! Command 'drbdmeta 1 v08 /dev/sdb internal apply-al' terminated with exit code 20
~]# cat /proc/drbd #查看DRBD状态
version: 8.4.2 (api:1/proto:86-101) GIT-hash: 7ad5f850d711223713d6dcadc3dd48860321070c build by , 2012-12-31 20:26:02 1: cs:Connected ro:Secondary/Secondary ds:Inconsistent/Inconsistent C r----- ns:0 nr:0 dw:0 dr:0 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:10485404
~]# mkdir /drbd #为DRBD分区挂载创建路径
**********************************************************************************************************************
五、设置主节点Primary node（master配置）
~]# drbdadm primary --force redis #设置master角色为Primary ~]# mkfs.ext4 /dev/drbd1 #格式化drbd1(逻辑设备)
mke2fs 1.41.12 (17-May-2010)
文件系统标签=
操作系统:Linux
块大小=4096 (log=2)
分块大小=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
655360 inodes, 2621351 blocks
131067 blocks (5.00%) reserved for the super user
第一个数据块=0
Maximum filesystem blocks=2684354560
80 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632
正在写入inode表: 完成
Creating journal (32768 blocks):
Writing superblocks and filesystem accounting information: 完成
This filesystem will be automatically checked every 36 mounts or 180 days, whichever comes first.
Use tune2fs -c or -i to override.~]# mount /dev/drbd1 /drbd #挂载DRBD分区 ~]# df -h
文件系统 容量 已用 可用 已用%% 挂载点 /dev/sda3 8.7G 1.1G 7.3G 13% / tmpfs 497M 0 497M 0% /dev/shm /dev/sda1 194M 64M 120M 35% /boot /dev/drbd1 9.9G 151M 9.2G 2% /drbd
六、同步测试：
mater操作：
~]# ls anaconda-ks.cfg drbd-8.4.2 drbd-8.4.2.tar.gz install.log install.log.syslog ~]# cp drbd-8.4.2.tar.gz /drbd ~]# ll /drbd 总用量 676 -rw-r--r-- 1 root root 675803 10月 15 21:14 drbd-8.4.2.tar.gz drwx------ 2 root root 16384 10月 15 21:07 lost+found ~]# umount /dev/drbd1 #卸载挂载的DRBD分区 ~]# drbdadm secondary redis #主节点角色降级
slave操作：
~]# drbdadm primary redis #备节点设置成primary角色 ~]# mount /dev/drbd1 /drbd #备节点挂载DRBD分区 ~]# df -h
文件系统 容量 已用 可用 已用%% 挂载点 /dev/sda3 8.7G 1.1G 7.3G 13% / tmpfs 497M 0 497M 0% /dev/shm /dev/sda1 194M 64M 120M 35% /boot /dev/drbd1 9.9G 152M 9.2G 2% /drbd
~]# ll /drbd 总用量 676 -rw-r--r-- 1 root root 675803 10月 15 21:14 drbd-8.4.2.tar.gz drwx------ 2 root root 16384 10月 15 21:07 lost+found
测试完成~！
