*************************************部署MYSQL*******************************************

yum -y install ?gcc gcc-c++ gcc-g77 autoconf automake zlib* fiex* libxml* ncurses-devel libmcrypt* libtool-ltdl-devel* make cmake bison*

useradd mysql -d /usr/local/mysql -s /sbin/nologin

tar -zxvf mysql-5.1.72.tar.gz

cd mysql-5.1.72.tar.gz

./configure --prefix=/usr/local/mysql/ --with-charset=utf8

make && make install

chown -R mysql.mysql /usr/local/mysql

cd /usr/local/mysql/scripts

./mysql_install_db --user=mysql --basedir=/usr/local/mysql/ --datadir=/data/mysql

copy配置文件到/etc目錄

[root@node1 mysql-5.1.72]# cp support-files/my-medium.cnf /etc/my.cnf

copy啟動腳本到資源目錄

cp support-files/mysql.server /etc/rc.d/init.d/mysqld

添加mysql服務

[root@node1 mysql-5.1.72]#chmod +x /etc/rc.d/init.d/mysqld

mysqladmin –u root password 123456 ? ? ? ?//設置roo密碼

10、啟動mysql

[root@node1 mysql-5.1.72]#service mysqld start

#配置庫文件搜索路徑

#echo "/usr/local/mysql/lib/mysql" >> /etc/ld.so.conf

#ldconfig

#添加/usr/local/mysql/bin到環(huán)境變量PATH中

#export PATH=$PATH:/usr/local/mysql/bin

cp -R /data/mysql

chown -R mysql.mysql /data/mysql

##編輯Mysql的配置文件/etc/my.cnf

[root@node1 ~]# sed -n "/^[^#]/p" /etc/my.cnf

[mysqld]

server-id=1 ? ? ? ? ? ? ? ? ? ? ##保證全局唯一

log-bin=mysql-bin##開啟記錄二進制日志的功能

relay-log=mysql-relay-bin

datadir=/data/mysql/

socket=/data/mysql/mysql.sock

user=mysql

symbolic-links=0

[mysqld_safe]

log-error=/var/log/mysqld.log

pid-file=/var/run/mysqld/mysqld.pid

將mysql啟動交給heartbeat來管理，在heartbeat資源腳本目錄中建立mysql的啟動腳本的軟鏈接

ln -s /etc/init.d/mysqld /etc/ha.d/resource.d/mysqld

#####重啟mysql服務#######

service mysqld restart

##############配置mysql的主從復制####################

在master上增加一個用于復制的帳號

mysql>GRANT REPLICATION SLAVE ON *.* TO 'repl'@'10.0.0.2' IDENTIFIED BY 'repl123456';

備份master上的數(shù)據(jù)，首先執(zhí)行如下語句：

mysql>FLUSH TABLES WITH READ LOCK;

mysql>reset master;

不要退出終端，否則這個鎖就失效了，在不退出終端的情況下，再開啟一個終端直接打包壓縮數(shù)據(jù)文件或使用mysqldump工具來導出數(shù)據(jù)。

cd /data/mysql

tar zcvf mysql.tar.gz /data/mysql

scp mysql.tar.gz ?root@10.0.0.2:/root/

數(shù)據(jù)傳輸完成后，再剛剛執(zhí)行FLUSHTABLES WITH READ LOCK 命令的master 終端上執(zhí)行如下命令：

mysql> UNLOCK TABLES;

查看master的狀態(tài)：

mysql>show master status\G ? #以下面列出的配置，進行設置slave的MASTER_LOG_FILE值，和MASTER_LOG_POS值。

設置slave主機

開啟master與slave的同步，在slave上執(zhí)行下列語句：

mysql>CHANGE MASTER TO MASTER_HOST='10.0.0.1',

->MASTER_USER='repl',

->MASTER_PASSWORD='repl123456',

->MASTER_LOG_FILE='mysql-bin.000001',

->MASTER_LOG_POS=106;

完成后，開啟slave

mysql>slave start;

查看slave狀態(tài)

mysql>show slave status\G

當Slave_IO_Running 和Slave_SQL_Running 都為yes時，表示配置成功。

****************************需要注意的幾個問題********************************

1)如果在my.cnf中定義了log-bin、relay-log參數(shù)，那么要保證這些定義與主機名無關，

因為如果這兩類的log文件名與主機名有關，切換過程會導致slave主機不能繼續(xù)同步，可以如下設置：

log-bin=mysql-bin

relay-log=mysql-relay-bin

保證兩臺主機上兩個文件的名字一樣

2)保證mysql能通過 start\stop\status 三個參數(shù)，默認heartbeat采用的是LSB風格，

返回值包含OK或者running則表示資源正常，返回值包含stopped或NO則表示資源不正常，其他資源腳本也類似。

3)不要設置mysql在機器重啟時自動啟動，mysqld作為heartbeat的一項資源，heartbeat會統(tǒng)一管理。

4)保證每臺mysql的my.cnf配置文件 除了server-id以外的其他配置項一模一樣。

************************************Heartbeat部署****************************************

兩臺主機的心跳網(wǎng)卡是eth1

node1的心跳IP是：10.0.0.1

node2的心跳IP是：10.0.0.2

安裝heartbeat:

1、首先創(chuàng)建用戶和組

groupadd -g 2000 haclient

useradd -u 2000 -g haclient hacluster

裝heartbeat所需的軟件包：

yum -y ?install ?pkgconfig glib2-devel ?e2fsprogs ?libxml2* ?PyXML

再編譯安裝libnet

tar -zxvf libnet-1.1.2.1.tar.gz -C ./

./configure

make && make install

安裝heartbeat

tar -zxvf heartbeat-2.1.2.tar.gz -C ./

./ConfigureMe configure

make&& make install

配置heartbeat

需要的配置文件有三個：ha.cf、haresources、authkeys。

這三個配置文件需要在/etc/ha.d 目錄下面，但是默認是沒有這三個文件的，所以你要：

copy 存放路徑/heartbeat-2.1.2/doc/ha.cf ? ? ? ? /etc/ha.d/

copy 存放路徑/ heartbeat-2.1.2/doc/haresources ?/etc/ha.d/

copy 存放路徑/ heartbeat-2.1.2/doc/authkeys ? ? /etc/ha.d/

修改authkeys的權限為600

chmod 600 /etc/ha.d/authkeys

配置ha.cf

[root@node2 ~]# sed -n "/^[^#]/p" /etc/ha.d/ha.cf

logfile/var/log/ha-log ? ? #指定heartbeat日志的位置

logfacilitylocal0

keepalive 1 ? ? ? ? ? ? ? ? #每秒檢測心跳

deadtime 15#備用節(jié)點15s內沒有檢測到主機心跳，確認對方故障

warntime 5#警告5次

initdead 30#守護進程啟動30s后，啟動服務資源

ucast eth1 10.0.0.1#另一臺主機的eth1和eth0的ip地址，通過兩個不同的網(wǎng)絡來檢測心跳可用性

ucast eth0 10.2.16.254

auto_failback off ? ? ? ? ? #當主節(jié)點切換到備節(jié)點之后，主節(jié)點恢復正常后，不進行切回操作，因為切換一次mysql-master的成本很高

respawn hacluster /usr/lib64/heartbeat/ipfail

respawn hacluster /usr/lib64/heartbeat/dopd #開啟dopd功能

apiauth ipfail gid=haclient uid=hacluster

apiauth dopd gid=haclient uid=hacluster

node node1 定義節(jié)點的主機名

node node2 定義節(jié)點的主機名

配置資源文件haresources

/etc/ha.d/haresources

node1 ?drbddisk::r0 Filesystem::/dev/drbd0::/data mysqld IPaddr::10.2.16.250/24/eth0

node1 是主節(jié)點的主機名

drbddisk是管理DRBD的腳本，默認heartbeat沒有，需要拷貝此腳本到 /etc/ha.d/resource.d/drbddisk (文末有此腳本，直接復制粘貼即可)

r0是drbd的啟動資源， “drbddisk::r0"可以切換drbd的主機為primary節(jié)點或secondary節(jié)點，只有狀態(tài)為primary的節(jié)點才能掛載drbd分區(qū)

drbddisk腳本相當于執(zhí)行drbdadm primary r0 或 drbdadm secondary r0操作，把drbd的資源角色變更并且掛載

mysqld 表示啟動本機的mysql服務

Ipaddr::10.2.16.250/24/eth0 表示虛擬IP為250實現(xiàn)IP漂移

配置authkeys認證文件

/etc/ha.d/authkeys

auth 1

1 sha1 HA_cluster ?#使用sha1驗證，密碼為：HA_cluster

#將drbddisk腳本加執(zhí)行權限：

chmod+x /etc/ha.d/resource.d/drbddisk

將主節(jié)點設置好后，直接拷貝 ha.cf haresources authkeys 以及 drbddisk文件到 備節(jié)點

scp ha.cf haresources authkeys ?resources.d/drbddisk ?root@10.0.0.2:/root/

在備節(jié)點上移動至ha.d目錄后，修改ha.cf的ucast值為主節(jié)點IP即可，其他不用變

確認mysql服務關閉后，在兩臺主機上，同時開啟heartbeat服務

service heartbeat start

通過查看 /var/log/ha-log 來觀察heartbeat的啟動過程

##############################drbddisk腳本#####################################

#!/bin/bash

#

# This script is inteded to be used as resource script by heartbeat

#

# Copright 2003-2008 LINBIT Information Technologies

# Philipp Reisner, Lars Ellenberg

#

###

DEFAULTFILE="/etc/default/drbd"

DRBDADM="/sbin/drbdadm"

if [ -f $DEFAULTFILE ]; then

. $DEFAULTFILE

fi

if [ "$#" -eq 2 ]; then

RES="$1"

CMD="$2"

else

RES="all"

CMD="$1"

fi

## EXIT CODES

# since this is a "legacy heartbeat R1 resource agent" script,

# exit codes actually do not matter that much as long as we conform to

# http://wiki.linux-ha.org/HeartbeatResourceAgent

# but it does not hurt to conform to lsb init-script exit codes,

# where we can.

# http://refspecs.linux-foundation.org/LSB_3.1.0/

#LSB-Core-generic/LSB-Core-generic/iniscrptact.html

####

drbd_set_role_from_proc_drbd()

{

local out

if ! test -e /proc/drbd; then

ROLE="Unconfigured"

return

fi

dev=$( $DRBDADM sh-dev $RES )

minor=${dev#/dev/drbd}

if [[ $minor = *[!0-9]* ]] ; then

# sh-minor is only supported since drbd 8.3.1

minor=$( $DRBDADM sh-minor $RES )

fi

if [[ -z $minor ]] || [[ $minor = *[!0-9]* ]] ; then

ROLE=Unknown

return

fi

if out=$(sed -ne "/^ *$minor: cs:/ { s/:/ /g; p; q; }" /proc/drbd); then

set -- $out

ROLE=${5%/**}

: ${ROLE:=Unconfigured} # if it does not show up

else

ROLE=Unknown

fi

}

case "$CMD" in

start)

# try several times, in case heartbeat deadtime

# was smaller than drbd ping time

try=6

while true; do

$DRBDADM primary $RES && break

let "--try" || exit 1 # LSB generic error

sleep 1

done

;;

stop)

# heartbeat (haresources mode) will retry failed stop

# for a number of times in addition to this internal retry.

try=3

while true; do

$DRBDADM secondary $RES && break

# We used to lie here, and pretend success for anything != 11,

# to avoid the reboot on failed stop recovery for "simple

# config errors" and such. But that is incorrect.

# Don't lie to your cluster manager.

# And don't do config errors...

let --try || exit 1 # LSB generic error

sleep 1

done

;;

status)

if [ "$RES" = "all" ]; then

echo "A resource name is required for status inquiries."

exit 10

fi

ST=$( $DRBDADM role $RES )

ROLE=${ST%/**}

case $ROLE in

Primary|Secondary|Unconfigured)

# expected

;;

*)

# unexpected. whatever...

# If we are unsure about the state of a resource, we need to

# report it as possibly running, so heartbeat can, after failed

# stop, do a recovery by reboot.

# drbdsetup may fail for obscure reasons, e.g. if /var/lock/ is

# suddenly readonly. So we retry by parsing /proc/drbd.

drbd_set_role_from_proc_drbd

esac

case $ROLE in

Primary)

echo "running (Primary)"

exit 0 # LSB status "service is OK"

;;

Secondary|Unconfigured)

echo "stopped ($ROLE)"

exit 3 # LSB status "service is not running"

;;

*)

# NOTE the "running" in below message.

# this is a "heartbeat" resource script,

# the exit code is _ignored_.

echo "cannot determine status, may be running ($ROLE)"

exit 4 # LSB status "service status is unknown"

;;

esac

;;

*)

echo "Usage: drbddisk [resource] {start|stop|status}"

exit 1

;;

esac

exit 0

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