corosync+drbd+pacemaker实现mysql服务器的HA群集

案例应用：红帽企业群集和存储管理之

mysql服务器的HA集群之corosync+drbd+pacemaker实现

上篇地址：

http://xjzhujunjie.blog.51cto.com/3582724/886317 

下篇地址： 

http://xjzhujunjie.blog.51cto.com/3582724/886323

案例应用企业需求：
某公司需要通过HA实现服务器的高可用性，即通过corosync+drbd+
pacemaker实现mysql服务器的高可用集群。
案例应用拓扑图：

案例应用实现步骤：
一．准备工作：
1.1 修改node1.junjie.com主机名，IP地址和系统时间
[root@node1 ~]# hostname 
node1.junjie.com
[root@node1 ~]# cat /etc/sysconfig/network
NETWORKING=yes
NETWORKING_IPV6=no
HOSTNAME=node1.junjie.com
[root@node1 ~]# hwclock -s
[root@node1 ~]# date
Tue Feb 7 21:11:46 CST 2012
[root@node1 ~]#
[root@node1 ~]# setup

[root@node1 ~]# service network restart
Shutting down interface eth0: [ OK ]
Shutting down loopback interface: [ OK ]
Bringing up loopback interface: [ OK ]
Bringing up interface eth0: [ OK ]
[root@node1 ~]# ifconfig eth0
eth0 Link encap:Ethernet HWaddr 00:0C:29:AE:83:D1 
inet addr:192.168.101.81 Bcast:192.168.101.255 Mask:255.255.255.0
1.2 修改node2.junjie.com主机名，IP地址和系统时间
[root@node2 ~]# hostname 
node2.junjie.com
[root@node2 ~]# cat /etc/sysconfig/network
NETWORKING=yes
NETWORKING_IPV6=no
HOSTNAME=node2.junjie.com
[root@node2 ~]# hwclock -s
[root@node2 ~]# date
Tue Feb 7 21:11:59 CST 2012
[root@node2 ~]#
[root@node2 ~]# setup

[root@node2 ~]# service network restart
Shutting down interface eth0: [ OK ]
Shutting down loopback interface: [ OK ]
Bringing up loopback interface: [ OK ]
Bringing up interface eth0: [ OK ]
[root@node2 ~]# ifconfig eth0
eth0 Link encap:Ethernet HWaddr 00:0C:29:D1:D4:32 
inet addr:192.168.101.82 Bcast:192.168.101.255 Mask:255.255.255.0
1.3 在node1和node2上配置hosts文件和ssh密钥信息
有利于以后在一个节点对另一节点直接操作。
1.3.1 在node1上修改/etc/hosts文件
[root@node1 ~]# echo "192.168.101.81 node1.junjie.com node1" >>/etc/hosts
[root@node1 ~]# echo "192.168.101.82 node2.junjie.com node2" >>/etc/hosts
1.3.1 在node1上修改/etc/hosts文件
[root@node2 ~]# echo "192.168.101.81 node1.junjie.com node1" >>/etc/hosts
[root@node2 ~]# echo "192.168.101.82 node2.junjie.com node2" >>/etc/hosts
1.3.3 在node1上配置ssh密钥信息
[root@node1 ~]# ssh-keygen -t rsa #一直输入空格
[root@node1 ~]# ssh-copy-id -i .ssh/id_rsa.pub [e-mail]
1.3.4 在node2上配置ssh密钥信息
[root@node2 ~]# ssh-keygen -t rsa #一直输入空格
[root@node2 ~]# ssh-copy-id -i .ssh/id_rsa.pub [e-mail]
[root@node2 ~]# ssh node1 'ifconfig' #将看到node2上的信息
1.4 下载相关软件包：（这里我将下载的软件包放在/root/ha/下面了，共18个）
资源的下载地址：
[root@node1 ~]# cd ha/
[root@node1 ha]#
cluster-glue-1.0.6-1.6.el5.i386.rpm
cluster-glue-libs-1.0.6-1.6.el5.i386.rpm
corosync-1.2.7-1.1.el5.i386.rpm
corosynclib-1.2.7-1.1.el5.i386.rpm
drbd83-8.3.8-1.el5.centos.i386.rpm
heartbeat-3.0.3-2.3.el5.i386.rpm
heartbeat-libs-3.0.3-2.3.el5.i386.rpm
kmod-drbd83-8.3.8-1.el5.centos.i686.rpm
ldirectord-1.0.1-1.el5.i386.rpm
libesmtp-1.0.4-5.el5.i386.rpm
mysql-5.5.15-linux2.6-i686.tar.gz
openais-1.1.3-1.6.el5.i386.rpm
openaislib-1.1.3-1.6.el5.i386.rpm
pacemaker-1.1.5-1.1.el5.i386.rpm
pacemaker-cts-1.1.5-1.1.el5.i386.rpm
pacemaker-libs-1.1.5-1.1.el5.i386.rpm
perl-TimeDate-1.16-5.el5.noarch.rpm
resource-agents-1.0.4-1.1.el5.i386.rpm
这里不需要ldirectord-1.0.1-1.el5.i386.rpm，故将其删除
[root@node1 ha]# rm ldirectord-1.0.1-1.el5.i386.rpm 
rm: remove regular file `ldirectord-1.0.1-1.el5.i386.rpm'? y
[root@node1 ha]# ssh node2 'mkdir /root/ha'
[root@node1 ha]# scp *.rpm node2:/root/ha/#将相关软件包移动到node2上
1.5 配置本地yum数据库

[root@node1 ha]# 
[root@node1 ha]# mkdir /mnt/cdrom/
[root@node1 ha]# mount /dev/cdrom /mnt/cdrom/
mount: block device /dev/cdrom is write-protected, mounting read-only
[root@node1 ha]# yum list all
[root@node1 ha]# 
[root@node1 ha]# scp /etc/yum.repos.d/server.repo node2:/etc/yum.repos.d/
server.repo 100% 647 0.6KB/s 00:00 
[root@node1 ha]#
[root@node1 ha]# ssh node2 'mkdir /mnt/cdrom/'
[root@node1 ha]# ssh node2 'mount /dev/cdrom /mnt/cdrom/'
[root@node1 ha]# ssh node2 'yum list all'
1.6 在node1上新增磁盘
[root@node1 ha]# cd
[root@node1 ~]# fdisk -l

Disk /dev/sda: 21.4 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 1318 10482412+ 83 Linux
/dev/sda3 1319 1579 2096482+ 82 Linux swap / Solaris
[root@node1 ~]# fdisk /dev/sda
p/n/p//+1000M/p/w
[root@node1 ~]# fdisk -l

Disk /dev/sda: 21.4 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 1318 10482412+ 83 Linux
/dev/sda3 1319 1579 2096482+ 82 Linux swap / Solaris
/dev/sda4 1580 1702 987997+ 83 Linux
[root@node1 ~]# partprobe /dev/sda
[root@node1 ~]# cat /proc/partitions 
major minor #blocks name

8 0 20971520 sda
8 1 104391 sda1
8 2 10482412 sda2
8 3 2096482 sda3
8 4 987997 sda4
[root@node1 ~]#
1.7 在node2上新增磁盘
[root@node2 ha]# cd
[root@node2 ~]# fdisk -l

Disk /dev/sda: 21.4 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 1318 10482412+ 83 Linux
/dev/sda3 1319 1579 2096482+ 82 Linux swap / Solaris
[root@node2 ~]# fdisk /dev/sda
p/n/p//+1000M/p/w
[root@node2 ~]# fdisk -l

Disk /dev/sda: 21.4 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 1318 10482412+ 83 Linux
/dev/sda3 1319 1579 2096482+ 82 Linux swap / Solaris
/dev/sda4 1580 1702 987997+ 83 Linux
[root@node2 ~]# partprobe /dev/sda
[root@node2 ~]# cat /proc/partitions 
major minor #blocks name

8 0 20971520 sda
8 1 104391 sda1
8 2 10482412 sda2
8 3 2096482 sda3
8 4 987997 sda4
[root@node2 ~]#
二、DRBD安装配置步骤
在node1和node2做以下操作：
我下载的软件包是：（我放在/root/ha/下了）
drbd83-8.3.8-1.el5.centos.i386.rpm 
kmod-drbd83-8.3.8-1.el5.centos.i686.rpm
2.1、安装DRBD 套件
[root@node1 ~]# cd ha/
[root@node1 ha]# ls
[root@node1 ha]# yum localinstall -y drbd83-8.3.8-1.el5.centos.i386.rpm kmod-drbd83-8.3.8-1.el5.centos.i686.rpm --nogpgcheck
[root@node1 ha]# cd

[root@node2 ~]# cd ha/
[root@node2 ha]# ls
[root@node2 ha]# yum localinstall -y drbd83-8.3.8-1.el5.centos.i386.rpm kmod-drbd83-8.3.8-1.el5.centos.i686.rpm --nogpgcheck
[root@node2 ha]# cd
2.2、加载DRBD 模块
[root@node1 ~]# modprobe drbd
[root@node1 ~]# lsmod |grep drbd
drbd 228528 0 
[root@node1 ~]# 
[root@node1 ~]# ssh node2 'modprobe drbd'
[root@node1 ~]# ssh node2 'lsmod |grep drbd'
drbd 228528 0 
[root@node1 ~]#
2.3、修改配置文件
drbd.conf配置文件DRBD运行时,会读取一个配置文件/etc/drbd.conf.这个文件里描述了DRBD设备与硬盘分区的映射关系
2.3.1 在node1上以下配置
[root@node1 ~]# cp /usr/share/doc/drbd83-8.3.8/drbd.conf /etc/
cp: overwrite `/etc/drbd.conf'? y
[root@node1 ~]# cat /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@node1 ~]# cd /etc/drbd.d/
[root@node1 drbd.d]# ll
total 4
-rwxr-xr-x 1 root root 1418 Jun 4 2010 global_common.conf
[root@node1 drbd.d]# cp global_common.conf global_common.conf.bak
#修改全局配置文件（说明略）

#修改资源配置文件（说明略）

2.3.2 复制配置到node2上：
[root@node1 drbd.d]# scp /etc/drbd.conf node2:/etc/
drbd.conf 100% 133 0.1KB/s 00:00 
[root@node1 drbd.d]# scp /etc/drbd.d/* node2:/etc/drbd.d/
global_common.conf 100% 427 0.4KB/s 00:00 
global_common.conf.bak 100% 1418 1.4KB/s 00:00 
mysql.res 100% 330 0.3KB/s 00:00 
[root@node1 drbd.d]#
2.4、 检测配置文件, 创建nfs 的资源
// 检测配置文件（两次执行如下命令)
[root@node1 drbd.d]# drbdadm adjust mysql
0: Failure: (119) No valid meta-data signature found.

==> Use 'drbdadm create-md res' to initialize meta-data area. <==

Command 'drbdsetup 0 disk /dev/sda4 /dev/sda4 internal --set-defaults --create-device --fencing=resource-only --on-io-error=detach' terminated with exit code 10
[root@node1 drbd.d]# drbdadm adjust mysql
drbdsetup 0 show:5: delay-probe-volume 0k => 0k out of range [4..1048576]k.
[root@node1 drbd.d]# drbdadm create-md mysql
Writing meta data...
initializing activity log
NOT initialized bitmap
New drbd meta data block successfully created.
[root@node1 drbd.d]# ll /dev/drbd0
brw-r----- 1 root disk 147, 0 Feb 7 21:51 /dev/drbd0

[root@node1 drbd.d]# ssh node2 'drbdadm create-md mysql'
NOT initialized bitmap
Writing meta data...
initializing activity log
New drbd meta data block successfully created.
[root@node1 drbd.d]# ssh node2 'ls -l /dev/drbd0'
brw-rw---- 1 root root 147, 0 Feb 7 21:53 /dev/drbd0
[root@node1 drbd.d]#
2.5 启动DRBD服务，查看DRBD状态
[root@node1 drbd.d]# service drbd start
Starting DRBD resources: [ 
mysql
Found valid meta data in the expected location, 1011703808 bytes into /dev/sda4.
d(mysql) s(mysql) n(mysql) ]outdated-wfc-timeout has to be shorter than degr-wfc-timeout
outdated-wfc-timeout implicitly set to degr-wfc-timeout (120s)
........
[root@node1 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 [e-mail], 2010-06-04 08:04:16
m:res cs ro ds p mounted fstype
0:mysql Connected Secondary/Secondary Inconsistent/Inconsistent C
[root@node1 drbd.d]#
[root@node1 drbd.d]# drbd-overview 
0:mysql Connected Secondary/Secondary Inconsistent/Inconsistent C r---- 
[root@node1 drbd.d]#

[root@node2 ha]# service drbd start
Starting DRBD resources: [ 
mysql
Found valid meta data in the expected location, 1011703808 bytes into /dev/sda4.
d(mysql) s(mysql) n(mysql) ].
[root@node2 ha]# service drbd status
drbd driver loaded OK; device status:
version: 8.3.8 (api:88/proto:86-94)
GIT-hash: d78846e52224fd00562f7c225bcc25b2d422321d build by [e-mail], 2010-06-04 08:04:16
m:res cs ro ds p mounted fstype
0:mysql Connected Secondary/Secondary Inconsistent/Inconsistent C
[root@node2 ha]#
[root@node2 ha]# drbd-overview 
0:mysql Connected Secondary/Secondary Inconsistent/Inconsistent C r---- 
[root@node2 ha]#
从上面的信息中可以看出此时两个节点均处于Secondary状态。于是，我们接下来需要将其中一个节点设置为Primary，这里将node1设置为主节点，故要在node1上执行如下命令：可以看到文件同步过程。
[root@node1 drbd.d]# drbdadm -- --overwrite-data-of-peer primary mysql
[root@node1 drbd.d]# drbd-overview 
0:mysql SyncSource Primary/Secondary UpToDate/Inconsistent C r---- 
[>...................] sync'ed: 8.3% (909688/987928)K delay_probe: 6
[root@node1 drbd.d]# drbd-overview 
0:mysql SyncSource Primary/Secondary UpToDate/Inconsistent C r---- 
[====>...............] sync'ed: 26.9% (727928/987928)K delay_probe: 23
[root@node1 drbd.d]# drbd-overview 
0:mysql SyncSource Primary/Secondary UpToDate/Inconsistent C r---- 
[============>.......] sync'ed: 67.8% (319864/987928)K delay_probe: 58
[root@node1 drbd.d]# drbd-overview 
0:mysql Connected Primary/Secondary UpToDate/UpToDate C r---- 
[root@node1 drbd.d]#
[root@node1 drbd.d]# cat /proc/drbd
version: 8.3.8 (api:88/proto:86-94)
GIT-hash: d78846e52224fd00562f7c225bcc25b2d422321d build by [e-mail], 2010-06-04 08:04:16
0: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r----
ns:987928 nr:0 dw:0 dr:987928 al:0 bm:61 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:0
[root@node1 drbd.d]#
注：Primary/Secondary 说明当前节点为主节点；Secondary/Primary 说明当前节点为从节点。使用：watch -n 1 'cat /proc/drbd'查看同步过程！
2.6 创建文件系统（只可以在primary节点上进行）
[root@node1 drbd.d]# mkfs -t ext3 /dev/drbd0
[root@node1 drbd.d]# mkdir -pv /mnt/mysqldata
mkdir: created directory `/mnt/mysqldata'
[root@node1 drbd.d]# ssh node2 'mkdir -pv /mnt/mysqldata'
mkdir: created directory `/mnt/mysqldata'
[root@node1 drbd.d]# mount /dev/drbd0 /mnt/mysqldata/
[root@node1 drbd.d]#
[root@node1 drbd.d]# cd /mnt/mysqldata/
[root@node1 mysqldata]# ll
total 16
drwx------ 2 root root 16384 Feb 7 22:33 lost+found
[root@node1 mysqldata]# echo "123" >>f1 
[root@node1 mysqldata]# touch f2
[root@node1 mysqldata]# ll
total 20
-rw-r--r-- 1 root root 4 Feb 7 22:35 f1
-rw-r--r-- 1 root root 0 Feb 7 22:36 f2
drwx------ 2 root root 16384 Feb 7 22:33 lost+found
[root@node1 mysqldata]# cd
[root@node1 ~]# umount /mnt/mysqldata/
至此DRBD配置成功！！！
三、mysql安装与配置
3.1 在node1.junjie.com上安装配置mysql
[root@node1 ~]# groupadd -r mysql
[root@node1 ~]# useradd -g mysql -r mysql
[root@node1 ~]# drbd-overview 
0:mysql Connected Primary/Secondary UpToDate/UpToDate C r---- 
[root@node1 ~]# mount /dev/drbd0 /mnt/mysqldata/
[root@node1 ~]# mkdir /mnt/mysqldata/data
[root@node1 ~]# chown -R mysql:mysql /mnt/mysqldata/data/
[root@node1 ~]# ll /mnt/mysqldata/
total 24
drwxr-xr-x 2 mysql mysql 4096 Feb 7 22:41 data
-rw-r--r-- 1 root root 4 Feb 7 22:35 f1
-rw-r--r-- 1 root root 0 Feb 7 22:36 f2
drwx------ 2 root root 16384 Feb 7 22:33 lost+found
[root@node1 ~]#
[root@node1 ha]# tar -zxvf mysql-5.5.15-linux2.6-i686.tar.gz -C /usr/local/
[root@node1 ~]# cd /usr/local/ 
[root@node1 src]# ln -sv mysql-5.5.15-linux2.6-i686/ mysql
create symbolic link `mysql' to `mysql-5.5.15-linux2.6-i686/'
[root@node1 src]# ll
[root@node1 src]# cd mysql
[root@node1 mysql]# chown mysql.mysql .
[root@node1 mysql]# scripts/mysql_install_db --user=mysql --datadir=/mnt/mysqldata/data/
[root@node1 mysql]# chown -R root .
[root@node1 mysql]# cp support-files/my-large.cnf /etc/my.cnf
[root@node1 mysql]# vim /etc/my.cnf
39 thread_concurrency = 2
40 datadir = /mnt/mysqldata/data/ #指定mysql数据文件的存放位置
为mysql提供sysv服务脚本，使其能使用service命令：
[root@node1 mysql]# cp support-files/mysql.server /etc/rc.d/init.d/mysqld
[root@node1 mysql]# scp /etc/my.cnf node2:/etc/
my.cnf 100% 4696 4.6KB/s 00:00 
[root@node1 mysql]# scp /etc/rc.d/init.d/mysqld node2:/etc/rc.d/init.d/
mysqld 100% 10KB 10.4KB/s 00:00 
[root@node1 mysql]#
[root@node1 mysql]# chkconfig --add mysqld
[root@node1 mysql]# chkconfig mysqld off
[root@node1 mysql]# chkconfig --list mysqld
mysqld 0:off 1:off 2:off 3:off 4:off 5:off 6:off
[root@node1 mysql]# service mysqld start
Starting MySQL..... [ OK ]
[root@node1 mysql]# ll /mnt/mysqldata/data/
ib_logfile0 mysql mysql-bin.000003 node1.junjie.com.pid
ib_logfile1 mysql-bin.000001 mysql-bin.index performance_schema
ibdata1 mysql-bin.000002 node1.junjie.com.err test
[root@node1 mysql]#
[root@node1 mysql]# service mysqld stop 
Shutting down MySQL. [ OK ]
[root@node1 mysql]#
为了使用mysql的安装符合系统使用规范，并将其开发组件导出给系统使用，这里还需要进行如下步骤：

输出mysql的man手册至man命令的查找路径：添加如下行即可：
[root@node1 mysql]# vim /etc/man.config
142 MANPATH /usr/local/mysql/man
输出mysql的头文件至系统头文件路径/usr/include，这可以通过简单的创建链接实现：
[root@node1 mysql]# ln -sv /usr/local/mysql/include /usr/include/mysql
create symbolic link `/usr/include/mysql' to `/usr/local/mysql/include'
[root@node1 mysql]#
输出mysql的库文件给系统库查找路径：（文件只要是在/etc/ld.so.conf.d/下并且后缀是.conf就可以）而后让系统重新载入系统库
[root@node1 mysql]# echo '/usr/local/mysql/lib' >> /etc/ld.so.conf.d/mysql.conf
[root@node1 mysql]# ldconfig -v |grep mysql 
/usr/local/mysql/lib:
libmysqlclient.so.18 -> libmysqlclient_r.so.18.0.0
修改PATH环境变量，让系统所有用户可以直接使用mysql的相关命令:
[root@node1 mysql]# vim /etc/profile
59 PATH=$PATH:/usr/local/mysql/bin #添加
[root@node1 mysql]# . /etc/profile
[root@node1 mysql]# echo $PATH
/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin:/usr/local/mysql/bin
卸载drbd设备：
[root@node1 mysql]# umount /mnt/mysqldata/
3.2 在node2.junjie.com上安装配置mysql
添加用户和组：
[root@node2 ~]# groupadd -r mysql
[root@node2 ~]# useradd -g mysql -r mysql
由于主设备才能读写，挂载，故我们还要设置node2为主设备，node1为从设备：
node1上操作
[root@node1 ~]# drbdadm secondary mysql
[root@node1 ~]# drbd-overview 
0:mysql Connected Secondary/Secondary UpToDate/UpToDate C r---- 
[root@node1 ~]#
node2上操作：
[root@node2 ~]# drbdadm primary mysql
[root@node2 ~]# drbd-overview 
0:mysql Connected Primary/Secondary UpToDate/UpToDate C r---- 
[root@node2 ~]#
挂载drbd设备：
[root@node2 ~]# mount /dev/drbd0 /mnt/mysqldata/
[root@node2 ~]# ll /mnt/mysqldata/
total 24
drwxr-xr-x 5 mysql mysql 4096 Feb 7 23:13 data
-rw-r--r-- 1 root root 4 Feb 7 22:35 f1
-rw-r--r-- 1 root root 0 Feb 7 22:36 f2
drwx------ 2 root root 16384 Feb 7 22:33 lost+found
[root@node2 ~]#
安装mysql：
[root@node2 ~]# cd ha/
[root@node2 ha]# tar -zxvf mysql-5.5.15-linux2.6-i686.tar.gz -C /usr/local/
[root@node2 ha]# cd /usr/local/
[root@node2 local]# ln -sv mysql-5.5.15-linux2.6-i686/ mysql
create symbolic link `mysql' to `mysql-5.5.15-linux2.6-i686/'
[root@node2 local]# cd mysql
一定不能对数据库进行初始化，因为我们在node1上已经初始化了：
[root@node2 mysql]# chown -R root:mysql .
mysql主配置文件和sysc服务脚本已经从node1复制过来了，不用在添加。
管理mysql服务：
[root@node2 mysql]# chkconfig --add mysqld
[root@node2 mysql]# chkconfig mysqld off
[root@node2 mysql]# chkconfig --list mysqld
mysqld 0:off 1:off 2:off 3:off 4:off 5:off 6:off
[root@node2 mysql]#
启动mysql服务：
[root@node2 mysql]# service mysqld start
Starting MySQL....... [ OK ]
[root@node2 mysql]# ls /mnt/mysqldata/data/
ib_logfile0 mysql-bin.000001 mysql-bin.index performance_schema
ib_logfile1 mysql-bin.000002 node1.junjie.com.err test
ibdata1 mysql-bin.000003 node2.junjie.com.err
mysql mysql-bin.000004 node2.junjie.com.pid
测试之后关闭服务：
[root@node2 mysql]# service mysqld stop 
Shutting down MySQL. [ OK ]
[root@node2 mysql]#
为了使用mysql的安装符合系统使用规范，并将其开发组件导出给系统使用，这里还需要进行如下步骤：

输出mysql的man手册至man命令的查找路径：添加如下行即可：
[root@node2 mysql]# vim /etc/man.config
142 MANPATH /usr/local/mysql/man
输出mysql的头文件至系统头文件路径/usr/include，这可以通过简单的创建链接实现：
[root@node2 mysql]# ln -sv /usr/local/mysql/include /usr/include/mysql
create symbolic link `/usr/include/mysql' to `/usr/local/mysql/include'
[root@node2 mysql]#
输出mysql的库文件给系统库查找路径：（文件只要是在/etc/ld.so.conf.d/下并且后缀是.conf就可以）而后让系统重新载入系统库
[root@node2 mysql]# echo '/usr/local/mysql/lib' >> /etc/ld.so.conf.d/mysql.conf
[root@node2 mysql]# ldconfig -v |grep mysql 
/usr/local/mysql/lib:
libmysqlclient.so.18 -> libmysqlclient_r.so.18.0.0
修改PATH环境变量，让系统所有用户可以直接使用mysql的相关命令:
[root@node2 mysql]# vim /etc/profile
59 PATH=$PATH:/usr/local/mysql/bin #添加
[root@node2 mysql]# . /etc/profile
[root@node2 mysql]# echo $PATH
/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin:/usr/local/mysql/bin
卸载drbd设备：
[root@node2 mysql]# umount /mnt/mysqldata/
四、corosync+pacemaker的安装和配置
4.1安装
[root@node1 ~]# cd ha/ 
[root@node1 ha]# yum localinstall -y *.rpm –nogpgcheck

[root@node2 ~]# cd ha/
[root@node2 ha]# yum localinstall -y *.rpm --nogpgcheck

Installed:
cluster-glue.i386 0:1.0.6-1.6.el5 cluster-glue-libs.i386 0:1.0.6-1.6.el5 
corosync.i386 0:1.2.7-1.1.el5 corosynclib.i386 0:1.2.7-1.1.el5 
heartbeat.i386 0:3.0.3-2.3.el5 heartbeat-libs.i386 0:3.0.3-2.3.el5 
libesmtp.i386 0:1.0.4-5.el5 openais.i386 0:1.1.3-1.6.el5 
openaislib.i386 0:1.1.3-1.6.el5 pacemaker.i386 0:1.1.5-1.1.el5 
pacemaker-cts.i386 0:1.1.5-1.1.el5 pacemaker-libs.i386 0:1.1.5-1.1.el5 
perl-TimeDate.noarch 1:1.16-5.el5 resource-agents.i386 0:1.0.4-1.1.el5

Dependency Installed:
libibverbs.i386 0:1.1.2-4.el5 librdmacm.i386 0:1.0.8-5.el5 
libtool-ltdl.i386 0:1.5.22-6.1 lm_sensors.i386 0:2.10.7-4.el5 
openhpi-libs.i386 0:2.14.0-5.el5 openib.noarch 0:1.4.1-3.el5

Complete!
4.2 对node1节点进行相应的配置
1：切换到主配置文件的目录
[root@node1 ha]# cd /etc/corosync/
[root@node1 corosync]# ll 
total 20
-rw-r--r-- 1 root root 5384 Jul 28 2010 amf.conf.example
-rw-r--r-- 1 root root 436 Jul 28 2010 corosync.conf.example
drwxr-xr-x 2 root root 4096 Jul 28 2010 service.d
drwxr-xr-x 2 root root 4096 Jul 28 2010 uidgid.d
[root@node1 corosync]# cp corosync.conf.example corosync.conf 
[root@node1 corosync]# vim corosync.conf
10 bindnetaddr: 192.168.101.0 #修改此行
#添加以下几行
33 service {
34 ver: 0
35 name: pacemaker
36 use_mgmtd: yes
37 }
38 ai***ec {
39 user: root
40 group: root
41 }
2:创建cluster目录
[root@node1 corosync]# mkdir /var/log/cluster
3:为了便面其他主机加入该集群，需要认证，生成一authkey
[root@node1 corosync]# corosync-keygen 
Corosync Cluster Engine Authentication key generator.
Gathering 1024 bits for key from /dev/random.
Press keys on your keyboard to generate entropy.
Writing corosync key to /etc/corosync/authkey.
[root@node1 corosync]# ll
total 28
-rw-r--r-- 1 root root 5384 Jul 28 2010 amf.conf.example
-r-------- 1 root root 128 Feb 8 00:13 authkey
-rw-r--r-- 1 root root 561 Feb 8 00:12 corosync.conf
-rw-r--r-- 1 root root 436 Jul 28 2010 corosync.conf.example
drwxr-xr-x 2 root root 4096 Jul 28 2010 service.d
drwxr-xr-x 2 root root 4096 Jul 28 2010 uidgid.d
[root@node1 corosync]#
4:将node1节点上的文件拷贝到节点node2上面（记住要带-p)
[root@node1 corosync]# scp -p authkey corosync.conf node2:/etc/corosync/
authkey 100% 128 0.1KB/s 00:00 
corosync.conf 100% 561 0.6KB/s 00:00 
[root@node1 corosync]# ssh node2 'mkdir -pv /var/log/cluster'
mkdir: created directory `/var/log/cluster'
[root@node1 corosync]#
5:在node1和node2节点上面启动 corosync 的服务
[root@node1 corosync]# service corosync start
Starting Corosync Cluster Engine (corosync): [ OK ]
6:验证corosync引擎是否正常启动了
[root@node1 ~]# grep -i -e "corosync cluster engine" -e "configuration file" /var/log/messages
Feb 8 01:12:48 node1 corosync[5198]: [MAIN ] Corosync Cluster Engine exiting with status 0 at main.c:170.
Feb 8 01:12:49 node1 corosync[5655]: [MAIN ] Corosync Cluster Engine ('1.2.7'): started and ready to provide service.
Feb 8 01:12:49 node1 corosync[5655]: [MAIN ] Successfully read main configuration file '/etc/corosync/corosync.conf'. 
7:查看初始化成员节点通知是否发出
[root@node1 ~]# grep -i totem /var/log/messages
Feb 8 01:12:49 node1 corosync[5655]: [TOTEM ] Initializing transport (UDP/IP).
Feb 8 01:12:49 node1 corosync[5655]: [TOTEM ] Initializing transmit/receive security: libtomcrypt SOBER128/SHA1HMAC (mode 0).
Feb 8 01:12:49 node1 corosync[5655]: [TOTEM ] The network interface [192.168.101.81] is now up.
Feb 8 01:12:49 node1 corosync[5655]: [TOTEM ] A processor joined or left the membership and a new membership was formed. 
8:检查过程中是否有错误产生
[root@node1 drbd.d]# grep -i error: /var/log/messages |grep -v unpack_resources
此处出现如下2个错误：

 

 

 

 

出现错误待续……

说明：本文不再维护

请参考：

 

 

案例应用：红帽企业群集和存储管理之

mysql服务器的HA集群之corosync+drbd+pacemaker实现