DRDB

DRDB

1、主服务器配置：
[root@master ~]# setup
[root@master ~]# service network restart
 
2、修改hosts文件：
[root@manage ~]# echo "192.168.2.2 master ">>/etc/hosts
[root@manage ~]# echo "192.168.2.2 slave ">>/etc/hosts
 
3、编辑yum客户端：
[root@master ~]# mkdir /mnt/cdrom
[root@master ~]# mount /dev/cdrom /mnt/cdrom/
[root@master ~]# vim /etc/yum.repos.d/rhel-debuginfo.repo
编辑的内容：
[rhel-server]
name=Red Hat Enterprise Linux server
baseurl=file:///mnt/cdrom/Server
enabled=1
gpgcheck=1
gpgkey=file:///mnt/cdrom/RPM-GPG-KEY-redhat-release
[rhel-cluster]
name=Red Hat Enterprise Linux cluster
baseurl=file:///mnt/cdrom/Cluster
enabled=1
gpgcheck=1
gpgkey=file:///mnt/cdrom/RPM-GPG-KEY-redhat-release
[rhel-clusterstorage]
name=Red Hat Enterprise Linux clusterstorage
baseurl=file:///mnt/cdrom/ClusterStorage
enabled=1
gpgcheck=1
gpgkey=file:///mnt/cdrom/RPM-GPG-KEY-redhat-release
 
4、新建分区：
[root@master ~]# fdisk /dev/sda
 
The number of cylinders for this disk is set to 1958.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
   (e.g., DOS FDISK, OS/2 FDISK)
 
Command (m for help): n   #增加新分区
Command action
   e   extended
   p   primary partition (1-4)
p   #增加主分区
Selected partition 4
First cylinder (328-1958, default 328):   Using default value 328
Last cylinder or +size or +sizeM or +sizeK (328-1958, default 1958): +1G  #大小为1G
 
Command (m for help): w   #保存退出
The partition table has been altered!
 
Calling ioctl() to re-read partition table.
 
WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table.
The new table will be used at the next reboot.
Syncing disks.
[root@master ~]#partprobe   /dev/sda
查看分区：
[root@master ~]#cat /proc/partitions
 5、安装drdb：
[root@master ~]# yum localinstall drbd83-8.3.8-1.el5.centos.i386.rpm kmod-drbd83-8.3.8-1.el5.centos.i686.rpm –nogpgcheck -y
 
加载DRBD 模块
[root@master ~]# modprobe drbd
查看模块加载
 [root@master ~]# lsmod |grep drbd
drbd                  228528 0
编辑配置文件
[root@master ~]# vim /etc/drbd.conf
在底行模式下输入“r /usr/share/doc/drbd83-8.3.8/drbd.conf”。
在从属服务器执行相同的操作；
 
[root@master ~]# cd /etc/drbd.d/                 
[root@master drbd.d]# cp global_common.conf global_common.conf.bak
[root@master drbd.d]# vim global_common.conf
内容为：
global {
        usage-count no;
        # minor-count dialog-refresh disable-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;
        }
}
 
定义资源：
名字为web.res
编辑
[root@master drbd.d]# vim web.res
resource web {
     
        on master {                          
                device /dev/drbd0;          
                disk /dev/sda4;              
                address 192.168.2.2:7898;    
                meta-disk internal;          
        }
        on slave {
                device /dev/drbd0;
                disk /dev/sda4;
                address 192.168.2.3:7898;
                meta-disk internal;
        }
}
 
将此两个文件拷贝到从属服务器中（地址为192.168.2.3）
[root@master drbd.d]# scp global_common.conf 192.168.2.3:/etc/drbd.d/
[root@master drbd.d]# scp web.res 192.168.2.3:/etc/drbd.d/
 
6、检测配置文件
[root@master drbd.d]# drbdadm adjust web
drbdsetup 0 show:5: delay-probe-volume 0k => 0k out of range [4..1048576]k.
7、创建web 的资源
[root@master drbd.d]# drbdadm create-md web
Writing meta data...
initializing activity log
NOT initialized bitmap
New drbd meta data block successfully created.
[root@master drbd.d]#
启动DRBD 服务
 
7、将一些文件拷贝到slave（192.168.2.3）中：
 
先拷贝hosts文件：
[root@master ~]# scp /etc/hosts 192.168.2.3:/etc/
The authenticity of host '192.168.2.3 (192.168.2.3)' can't be established.
RSA key fingerprint is d4:f1:06:3b:a0:81:fd:85:65:20:9e:a1:ee:46:a6:8b.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.2.3' (RSA) to the list of known hosts.
[email protected]'s password:         #输入slave的管理员密码
 
拷贝yum客户端：
[root@master ~]# scp /etc/yum.repos.d/rhel-debuginfo.repo 192.168.1.3:/etc/yum.repos.d/
[email protected]'s password:   #输入slave管理员的密码
 
拷贝drdb安装包：
[root@master ~]# scp *.rpm 192.168.1.3:/root
[email protected]'s password:   #输入slave管理员的密码
 
2、从属服务器配置：
 
1、新建分区：（注意新建分区大小与主服务器一样）
 
[root@slave ~]# fdisk /dev/sda
 
The number of cylinders for this disk is set to 2610.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
   (e.g., DOS FDISK, OS/2 FDISK)
 
Command (m for help): n   #增加新分区
Command action
   e   extended
   p   primary partition (1-4)
p    #增加主分区
Selected partition 4
First cylinder (1580-2610, default 1580):    #默认柱面，直接回车
Using default value 1580
Last cylinder or +size or +sizeM or +sizeK (1580-2610, default 2610): +1G   #大小为1G
 
Command (m for help): W    #保存退出
The partition table has been altered!
 
Calling ioctl() to re-read partition table.
 
WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table.
The new table will be used at the next reboot.
Syncing disks.
[root@slave ~]# partprobe   /dev/sda
 
 
2、安装drdb：
[root@slave ~]# mkdir /mnt/cdrom/
[root@slave ~]# mount /dev/cdrom /mnt/cdrom/
[root@slave ~]#yum localinstall drbd83-8.3.8-1.el5.centos.i386.rpm kmod-drbd83-8.3.8-1.el5.centos.i686.rpm –nogpgcheck -y
 
3、检测配置文件
[root@slave drbd.d]# drbdadm adjust web
 
4、创建web 的资源
[root@slave drbd.d]# drbdadm create-md web
Writing meta data...
initializing activity log
NOT initialized bitmap
New drbd meta data block successfully created.
 
3、接下来在两台服务器上同时操作
 
1、在主服务器和从属服务器上同时启动drbd服务：
 主服务器：[root@master drbd.d]# service drbd start
 从属服务器：[root@slave drbd.d]# service drbd start
 
2、查看两台服务器上的drbd状态：
 
master：
[root@master drbd.d]# cat /proc/drbd
version: 8.3.8 (api:88/proto:86-94)
GIT-hash: d78846e52224fd00562f7c225bcc25b2d422321d build by [email protected], 2010-06-04 08:04:16
 0: 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:b oos:987928
slave
[root@slave drbd.d]# cat /proc/drbd
version: 8.3.8 (api:88/proto:86-94)
GIT-hash: d78846e52224fd00562f7c225bcc25b2d422321d build by [email protected], 2010-06-04 08:04:16
 0: 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:b oos:987928
 
可知两台服务器都为Secondary状态，证明还没有同步。
 
3、在master上操作：
创建文件夹：
[root@master drbd.d]# mkdir /mnt/1
指定主节点：
[root@master drbd.d]# drbdsetup /dev/drbd0 primary –o
格式化分区：
[root@master drbd.d]# mkfs.ext3 /dev/drbd0
挂在分区：
[root@master drbd.d]# mount /dev/drbd0 /mnt/1/
再次查看两台服务器的状态：
 
master：
[root@master drbd.d]# service drbd status
drbd driver loaded OK; device status:
version: 8.3.8 (api:88/proto:86-94)
GIT-hash: d78846e52224fd00562f7c225bcc25b2d422321d build by [email protected], 2010-06-04 08:04:16
m:res cs         ro                 ds                 p mounted fstype
0:web Connected Primary/Secondary UpToDate/UpToDate C /mnt/1   ext3
 
slave
[root@slave drbd.d]# cat /proc/drbd
version: 8.3.8 (api:88/proto:86-94)
GIT-hash: d78846e52224fd00562f7c225bcc25b2d422321d build by [email protected], 2010-06-04 08:04:16
 0: 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:b oos:987928
[root@slave drbd.d]# service drbd status
drbd driver loaded OK; device status:
version: 8.3.8 (api:88/proto:86-94)
GIT-hash: d78846e52224fd00562f7c225bcc25b2d422321d build by [email protected], 2010-06-04 08:04:16
m:res cs         ro                 ds                 p mounted fstype
0:web Connected Secondary/Primary  UpToDate/UpToDate C
 
可知master为主服务，salve为从属，此时已经同步。
 
4、NFS配置：
 
两台服务器都修改nfs 配置文件如下：
[root@master drbd.d]# vim /etc/exports
 
/mnt/1 *(rw,sync,insecure,no_root_squash,no_wdelay)
 
两台服务器都启动服务并设为开机自启动：
service portmap start && chkconfig portmap on
service nfs start && chkconfig nfs on
 
、两台服务器都修改nfs 启动脚本。将/etc/init.d/nfs 脚本中的stop 部分中的killproc
nfsd -2 修改为 -9
master：
[root@master drbd.d]# vim /etc/init.d/nfs
slave：
 
5、Heartbeat配置
在两台服务器上都操作：
yum localinstall heartbeat-2.1.4-9.el5.i386.rpm heartbeat-pils-2.1.4-10.el5.i386.rpm heartbeat-stonith-2.1.4-10.el5.i386.rpm libnet-1.1.4-3.el5.i386.rpm perl-MailTools-1.77-1.el5.noarch.rpm  --nogpgcheck
 
拷贝配置文档：
主服务器
[root@master ~]# cd /etc/ha.d/
[root@master ha.d]# cp /usr/share/doc/heartbeat-2.1.4/ha.cf ./
[root@master ha.d]# cp /usr/share/doc/heartbeat-2.1.4/haresources ./
[root@master ha.d]# cp /usr/share/doc/heartbeat-2.1.4/authkeys ./
 
[root@master ha.d]# vim ha.cf
需要打开或修改以下几行：
24行  debugfile /var/log/ha-debug
29行  logfile /var/log/ha-log
34行  logfacility     local0
48行  keepalive 2
56行  deadtime 30
76行  udpport 692
121行  ucast eth0 192.168.2.2   #修改为自己的地址，与另一台不同。
220行  ping 192.168.2.1
157行  auto_failback off #设为关闭状态。
在212行下面添加以下两行：
node    master
node    slave
 
在另一台服务器上修改的ha.cf中只有121行不一样。改为自己的地址192.168.1.3
 
配置haresources，2台机子相同：
echo "master IPaddr::192.168.2.100/24/eth0 drbddisk::web Filesystem::/dev/drbd0::/mnt/1::ext3 killnfsd" >> /etc/ha.d/haresources
 
authkeys 配置相同：
auth 1
1 crc
#2 sha1 HI!
#3 md5 Hello!
 
在/etc/ha.d/resource.d目录下创建文件killnfsd并编辑（在两台服务器编辑一样）
 
echo "killall -9 nfsd;/etc/init.d/nfs restart;exit 0" >> /etc/ha.d/resource.d/killnfsd
 
设置文档权限：
chmod 600 /etc/ha.d/authkeys
chmod 755 /etc/ha.d/resource.d/killnfsd
 
开启Heartbeat服务
master：
[root@master ha.d]# service heartbeat start
 
slave：
[root@slave ha.d]# service heartbeat start
 
 
6、测试
在测试机上将192.168.2.100:/mnt/1 挂到本地/mnt/nfs
[root@server1 ~]# mkdir /mnt/nfs
[root@server1 ~]# mount 192.168.2.100:/mnt/1 /mnt/nfs/
 
在测试机上创建测试shell，二秒一个
[root@server1 ~]# vim /mnt/test.sh
[root@server1 ~]#cd /mnt/
[root@server1 mnt]# ./test.sh
将主节点master 的heartbeat服务停止，则备节点slave 接管服务
 
#测试脚本终端显示如下
[root@server1 mnt]# ./test.sh
---> trying touch x : Wed Feb 15 01:43:19 CST 2012
<----- done touch x : Wed Feb 15 01:43:19 CST 2012
 
---> trying touch x : Wed Feb 15 01:43:21 CST 2012
<----- done touch x : Wed Feb 15 01:43:21 CST 2012
 
---> trying touch x : Wed Feb 15 01:43:23 CST 2012
<----- done touch x : Wed Feb 15 01:43:23 CST 2012
 
---> trying touch x : Wed Feb 15 01:43:25 CST 2012
<----- done touch x : Wed Feb 15 01:43:25 CST 2012
 
---> trying touch x : Wed Feb 15 01:43:27 CST 2012
<----- done touch x : Wed Feb 15 01:43:27 CST 2012
 
---> trying touch x : Wed Feb 15 01:43:29 CST 2012
<----- done touch x : Wed Feb 15 01:43:29 CST 2012
 
---> trying touch x : Wed Feb 15 01:43:31 CST 2012
<----- done touch x : Wed Feb 15 01:43:31 CST 2012
 
---> trying touch x : Wed Feb 15 01:43:33 CST 2012
<----- done touch x : Wed Feb 15 01:43:33 CST 2012
 
---> trying touch x : Wed Feb 15 01:43:35 CST 2012
<----- done touch x : Wed Feb 15 01:43:35 CST 2012
 
---> trying touch x : Wed Feb 15 01:43:37 CST 2012
<----- done touch x : Wed Feb 15 01:43:37 CST 2012
 
---> trying touch x : Wed Feb 15 01:43:39 CST 2012
<----- done touch x : Wed Feb 15 01:43:39 CST 2012
 
---> trying touch x : Wed Feb 15 01:43:41 CST 2012
<----- done touch x : Wed Feb 15 01:43:41 CST 2012
 
---> trying touch x : Wed Feb 15 01:43:43 CST 2012
<----- done touch x : Wed Feb 15 01:43:43 CST 2012