mysql+drbd+heartbeat+主从

系统介绍：mysql+drbd+heartbeat+主从
mysql_drbdA  eth0:192.168.1.233 eth1:172.20.27.10
mysql_drbdB  eth0:192.168.1.234 eth1:172.20.27.20
VIP=192.168.1.235
mysql_slaveA eth0:192.168.1.232 eth1:172.20.27.30
一：DRBD安装
1.在mysql_drbdA和mysql_drbdB上面同时安装下面软件
1.1修改分别主机名为mysql_drbdA和mysql_drbdB
 vi /etc/hosts增加以下内容
 192.168.1.233 mysql_drbdA
 192.168.1.234 mysql_drbdB
1.2安装
tar zxvf drbd-8.3.5.tar.gz 
cd drbd-8.3.5
 make
 make install
 chkconfig --add drbd
 chkconfig --level 35 drbd off
1.3加载DRBD模块
 modprobe drbd
 lsmod |grep drbd
1.4配置/etc/drbd.conf
rm -rf /etc/drbd.conf
vi /etc/drbd.conf
global { usage-count yes; }
common { syncer { rate 100M; } }
resource r0 {
     protocol C;


startup { 
  wfc-timeout 0; 
  degr-wfc-timeout 120; 
}
disk { 
  on-io-error detach;
}
     net {
          cram-hmac-alg sha1; 
          shared-secret "FooFunFactory";
     }
     on mysql_drbdA {
          device    /dev/drbd0;
          disk      /dev/sdb1;
          address   192.168.1.233:7898;
          meta-disk  internal;
     }
     on mysql_drbdB {
          device    /dev/drbd0;
          disk      /dev/sdb1;
          address   192.168.1.234:7898;
          meta-disk  internal;
     } 
}
1.5创建一块虚拟硬盘为/dev/sdb的10G空间
 fdisk /dev/sdb(进去以后输入n,然后输入p,然后输入1,然后回车，然后输入+10G,最后输入w)
 mkfs.ext3 /dev/sdb1或者 dd if=/dev/zero bs=1M count=1 of=/dev/sdb1
 mkdir /data/mysql
1.6在mysql_drbdA和mysql_drbdB上面同时启动及使用
1.6.1建立md设备
  drbdadm create-md r0
1.6.2启动drbd服务程序
 /etc/init.d/drbd start
1.6.3确认drbd状态
 cat /proc/drbd
version: 8.3.5 (api:88/proto:86-91)
GIT-hash: ded8cdf09b0efa1460e8ce7a72327c60ff2210fb build by [email protected], 2012-06-08 17:47:52
 0: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r----
    ns:1959800 nr:0 dw:0 dr:1959800 al:0 bm:120 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:0
再次确认backup的drbd状态
 cat /proc/drbd
 GIT-hash: ded8cdf09b0efa1460e8ce7a72327c60ff2210fb build by root@backup, 2012-06-08 18:10:58
 0: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate C r----
    ns:0 nr:1959800 dw:1959800 dr:0 al:0 bm:120 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:0
2.在mysql_drbdA上面验证磁盘镜像结果
初始化Primary机
第一次的话要使用
drbdsetup /dev/drbd0 primary -o
以后可以使用drbdadm  primary all命令。
再次确认master的drbd状态
将新创建的设备格式化并且挂载：
mkfs.ext3 /dev/drbd0  //破坏文件系统：dd if=/dev/zero bs=1M of=/dev/sdb1;sync 
mount /dev/drbd0 /data/
将主服务器降为从：
先卸载设备：
 umount /data/ 
drbdadm secondary all 
3.解决drbd脑裂问题
3.1在从节点mysql_drbdB上面执行
/etc/init.d/heartbeat stop
drbdadm -- --discard-my-data connect r0
3.2在主节点mysql_drbdA上面执行
/etc/init.d/heartbeat stop
drbdadm disconnect r0
drbdadm connect r0
drbdadm primary r0
二.安装mysql数据库
2.1在mysql_drbdA安装mysql数据库
mount /dev/drbd0 /data/
chown -R mysql.mysql  /data/mysql
yum -y install ncurses ncurses-devel
groupadd mysql
useradd -g mysql -s /sbin/nologin mysql 
cd /root/soft
tar zxvf mysql-5.1.41.tar.gz
chown -R mysql:mysql mysql-5.1.41
cd mysql-5.1.41
./configure \
--prefix=/usr/local/mysql \
--localstatedir=/data/mysql \
--with-unix-socket-path=/data/mysql/mysql.sock \
--with-plugins=innobase,partition,myisam,heap \
--enable-assembler \
--with-charset=utf8 \
--enable-thread-safe-client \
--with-client-ldflags=-all-static \
--with-mysqld-ldflags=-all-static \
--enable-static=yes \
--with-big-tables   
make
make install
cp /usr/local/mysql/share/mysql/my-medium.cnf /etc/my.cnf
sed -i '/myisam_/  a\ pid-file = /data/mysql/mysql.pid' /etc/my.cnf
sed -i '/pid-file/  a\ datadir = /data/mysql' /etc/my.cnf
chown -R mysql:mysql /usr/local/mysql
chown -R mysql:mysql /data/mysql
/usr/local/mysql/bin/mysql_install_db \
--basedir=/usr/local/mysql \
--defaults-file=/etc/my.cnf \
--skip-external-locking \
--user=mysql
/usr/local/mysql/bin/mysqld_safe \
--defaults-file=/etc/my.cnf \
--user=mysql &
cp /usr/local/mysql/share/mysql/mysql.server /etc/init.d/mysqld
chmod 700 /etc/init.d/mysqld
ln -s /usr/local/mysql/bin/mysql /usr/bin/
ln -s /usr/local/mysql/bin/mysqldump /usr/bin/
service mysqld start
chkconfig mysqld off
2.2在mysql_drbdB安装mysql数据库
mount /dev/drbd0 /data/
yum -y install ncurses ncurses-devel
groupadd mysql
useradd -g mysql -s /sbin/nologin mysql 
cd /root/soft
tar zxvf mysql-5.1.41.tar.gz
chown -R mysql:mysql mysql-5.1.41
cd mysql-5.1.41
./configure \
--prefix=/usr/local/mysql \
--localstatedir=/data/mysql \
--with-unix-socket-path=/data/mysql/mysql.sock \
--with-plugins=innobase,partition,myisam,heap \
--enable-assembler \
--with-charset=utf8 \
--enable-thread-safe-client \
--with-client-ldflags=-all-static \
--with-mysqld-ldflags=-all-static \
--enable-static=yes \
--with-big-tables   
make
make install
cp /usr/local/mysql/share/mysql/my-medium.cnf /etc/my.cnf
sed -i '/myisam_/  a\ pid-file = /data/mysql/mysql.pid' /etc/my.cnf
sed -i '/pid-file/  a\ datadir = /data/mysql' /etc/my.cnf
chown -R mysql:mysql /usr/local/mysql
chown -R mysql:mysql /data/mysql
cp /usr/local/mysql/share/mysql/mysql.server /etc/init.d/mysqld
chmod 700 /etc/init.d/mysqld
ln -s /usr/local/mysql/bin/mysql /usr/bin/
ln -s /usr/local/mysql/bin/mysqldump /usr/bin/
service mysqld start
chkconfig mysqld off
三：heartbeat安装
3.1.在mysql_drbdA和mysql_drbdB安装libnet和heartbeat
tar zxvf libnet-1.1.6.tar.gz 
 cd libnet-1.1.6
./configure 
 make && make install
3.2.添加用户
groupadd haclient
useradd -g haclient hacluster 
3.3.heartbeat编译
tar zxvf heartbeat-2.1.3.tar.gz 
cd heartbeat-2.1.3
./ConfigureMe configure
make && make install
3.4.配置heartbeat
 cd /etc/ha.d/
 vi ha.cf
    debugfile /var/log/ha-debug
    logfile /var/log/ha-log
    logfacility local0
keepalive 2
deadtime 15
warntime 5
initdead 120
        udpport 694
        bcast  eth0
auto_failback off
node mysql_drbdA
node mysql_drbdB
ucast eth0 192.168.1.234    #(对端服务器这里配置192.168.1.233 ) 
respawn  hacluster /usr/lib64/heartbeat/ipfail
apiauth  ipfail   gid=haclient  uid=hacluster
hopfudge
 vi  authkeys 
  auth 3
3 md5 Hello!


chmod 600 authkeys 
cp /etc/init.d/mysqld /etc/ha.d/resource.d/
 vi haresources
  mysql_drbdA drbddisk Filesystem::/dev/drbd0::/data::ext3 mysqld 192.168.1.235 (对端服务器这里写mysql_drbdB) 
/etc/init.d/heartbeat start
3.5在mysql_drbdA重启服务器需执行下面命令
modprobe drbd
service drbd start
drbdadm  primary all
mount /dev/drbd0 /data/
service mysqld restart
/etc/init.d/heartbeat start
3.6在mysql_drbdB重启服务器需执行下面命令
modprobe drbd
service drbd start
/etc/init.d/heartbeat start
四：从向VIP数据同步
4.1在mysql_drbdA和mysql_drbdB配置
1)、确保/etc/my.cnf中有如下参数，没有的话需手工添加，并重启mysql服务。
[mysqld]
log-bin=mysql-bin      #启动二进制文件
expire_logs_days = 20  #保留20的天的二进制日志 
server-id=1            #服务器ID
binlog-ignore-db =mysql #不需要备份的数据库，多个写多行
binlog-ignore-db =test
binlog-ignore-db =information_schema 
2)、登录mysql，在mysql中添加一个backup的账号，并授权给从服务器。
mysql -uroot -p123
grant replication slave on *.* to 'backup'@'192.168.1.232' identified by 'backup'; 创建backup用户，并授权给192.168.1.232使用。
flush privileges;
quit 
4.2在mysql_slaveA从服务器上操作：
1)、确保/etc/my.cnf中有log-bin=mysql-bin和server-id=1参数，并把server-id=1修改为server-id=2。修改之后如下所示：
[mysqld]
log-bin=mysql-bin    #这个参数可以不用，因为他不需要双向同步
binlog_format=mixed
server-id=2
master-host          = 192.168.1.235   
master-user          = backup 
master-password      = backup    
master-port          = 3306    
master-connect-retry = 120  
read-only            = 1   
relay-log-purge      = 1  
replicate-ignore-db  = mysql  #不需要同步数据库，多个写多行
replicate-ignore-db  = test
replicate-ignore-db  = information_schema
slave-skip-errors    = all  
2）、重启mysql服务。
service mysqld restart 
3)、登录mysql，执行如下语句
mysql -uroot -p123
slave stop;
change master to 
master_host='192.168.1.235',master_user='backup',master_password='backup',master_log_file='mysql-bin.000059',master_log_pos=106;
4)、启动slave同步。
mysql> start slave; 
5)、检查主从同步，如果您看到Slave_IO_Running和Slave_SQL_Running均为Yes，则主从复制连接正常。
mysql> show slave status\G
验证配置是否正常，mysql主从能否正常复制。