lvs+keepalived+mysql主主複製集羣搭建

MySQL服務器:192.168.2.134,192.168.2.135html

MySQL主從同步的數據庫爲:chaosdbnode

實現目的:mysql

增長兩臺服務器(主備),經過LVS+Keepalived實現MySQL從庫讀操做負載均衡linux

架構規劃:c++

操做系統:CentOS 6.X 64位算法

LVS主服務器:192.168.2.133sql

LVS備服務器:192.168.2.132數據庫

LVS虛擬服務器(VIP):192.168.2.137vim

部署完成以後,經過VIP:192.168.21.254,根據LVS調度算法來訪問後端真實的MySQL從服務器,實現負載均衡。後端

 

第一部分:分別在兩臺MySQL服務器上操做,即在192.168.2.134,192.168.2.135,執行的操做都是分別執行

1、關閉SELINUX

vim /etc/selinux/config#編輯,添加如下代碼

#SELINUX=enforcing #註釋掉

#SELINUXTYPE=targeted #註釋掉

SELINUX=disabled #增長

setenforce 0 #使配置當即生效

 

2、配置防火牆,開啓3306端口

vi /etc/sysconfig/iptables  #編輯,添加如下代碼

-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 3306 -j ACCEPT  #容許3306端口經過防火牆

/etc/init.d/iptables restart #重啓防火牆使配置生效

或者直接關閉防火牆

#/etc/init.d/iptables status                ## 查看防火牆狀態

#/etc/init.d/iptable stop                    ## 本次關閉防火牆

#/etc/init.d/iptable restart                ## 重啓防火牆

永久性關閉防火牆

#chkconfig --level 35 iptables off     ## 注意中間的是兩個英式小短線;重啓

 

3、綁定LVS虛擬服務器(VIP):192.168.2.137 到lo:0

vim /etc/init.d/ivsrs  #編輯,添加如下代碼

#!/bin/bash
# description: Config realserver lo and apply noarp
#Written by :chaosju
        
SNS_VIP=192.168.2.137
         
. /etc/rc.d/init.d/functions
         
case "$1" in
   start)
    /sbin/ifconfig lo:0 $SNS_VIP broadcast $SNS_VIP  netmask 255.255.255.255 up               
     echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore
     echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce
     echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore
     echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce
     echo "RealServer Start OK"
     ;;
   stop)
    /sbin/ifconfig lo:0 down
    echo "0" >/proc/sys/net/ipv4/conf/lo/arp_ignore
    echo "0" >/proc/sys/net/ipv4/conf/lo/arp_announce
    echo "0" >/proc/sys/net/ipv4/conf/all/arp_ignore
    echo "0" >/proc/sys/net/ipv4/conf/all/arp_announce
    echo "RealServer Stoped"
    ;;
 *)
    echo "Usage: $0 {start|stop}"
    exit 1
esac
         
   exit 0

 

啓動: /etc/init.d/ivsrs start

關閉: /etc/init.d/ivsrs stop

4、設置mysql主主複製和遠程訪問

 參考博客  http://blog.chinaunix.net/uid-11582448-id-3026152.html

1.安裝mysql

rpm -qa | grep mysql  // 這個命令就會查看該操做系統上是否已經安裝了mysql數據庫

rpm -e mysql  // 普通刪除模式

rpm -e --nodeps mysql  // 強力刪除模式,若是使用上面命令刪除時,提示有依賴的其它文件,則用該命令能夠對其進行強力刪除

yum list | grep mysql  //查看yum上提供的mysql數據庫可下載的版本
yum install -y mysql-server mysql mysql-devel // 安裝mysql時咱們並非安裝了mysql客戶端就至關於安裝好了mysql數據庫了,咱們還須要安裝mysql-server服務端才行

2.設置root密碼

 

//第一次進入時,由於Root用戶密碼爲空,輸入:
# mysql   //能夠直接進入
//設置Mysql root用戶密碼:
# mysqladmin -u root password admin
//有密碼時進入Mysql:
# mysql -u root -padmin

 

3.mysql默認文件路徑

/etc/my.cnf:MySQL服務器配置文件。

/var/lib/mysql:MySQL數據目錄,能夠經過my.cnf修改。

/usr/bin/mysqlamdin:MySQL服務器命令行程序。

/usr/bin/mysql:MySQL客戶端命令行程序。

4.主主複製設置

 

一、兩臺機器上都創建用戶,並賦予複製權限:
192.168.2.132
 mysql> CREATE USER 'ms1'@'%';
 mysql> GRANT REPLICATION SLAVE ON *.* TO 'ms1'@'%' IDENTIFIED BY 'ms1';
192.168.2.133
 mysql> CREATE USER 'ms2'@'%';
 mysql> GRANT REPLICATION SLAVE ON *.* TO 'ms2'@'%' IDENTIFIED BY 'ms2';

或者直接賦予全部權限,最好賦予全部權限,keepalived須要遠程訪問mysql服務器
GRANT ALL ON *.* TO ms1@'%' IDENTIFIED BY 'ms1' WITH GRANT OPTION;   
GRANT ALL ON *.* TO ms1@'%' IDENTIFIED BY 'ms2' WITH GRANT OPTION;   

 

二、修改兩臺服務器上的mysql配置文件
192.168.2.134
    [mysqld]
    # for repl
    server-id = 1
    log-bin = mysql-bin
    auto-increment-increment= 2 // 應設爲整個結構中服務器的總數
    auto-increment-offset = 1 // 設定數據庫中自動增加的起點,避免兩臺服務器數據同步時出現主鍵衝突
192.168.2.135
    [mysqld]
    # for repl
    server-id = 2
    log-bin = mysql-bin
    auto-increment-increment= 2
    auto-increment-offset = 1
三、重啓兩臺mysql服務器上的mysql服務

service mysqld restart
 設置兩臺mysql互爲主從
四、master1上指定master2爲主:
mysql> CHANGE MASTER TO -> MASTER_HOST='192.168.2.132', -> MASTER_USER='ms2', -> MASTER_PASSWORD='ms2'; Query OK, 0 rows affected (0.19 sec) mysql> START SLAVE; 五、master2上指定master1爲主: mysql> CHANGE MASTER TO -> MASTER_HOST='192.168.2.133', -> MASTER_USER='ms1', -> MASTER_PASSWORD='ms1'; mysql> START SLAVE;

注意若是出現錯誤 ERROR 1200 (HY000): The server is not configured as slave; fix in config file or with CHANGE MASTER TO
解決辦法 http://blog.itpub.net/27099995/viewspace-1294103/
六、如今就是要是測試是否是能夠相互複製了。
   操做master1,卡看maste2有同步沒
   操做master2,看看master2有同步沒

第二部分:分別在兩臺LVS主備服務器上操做,即192.168.2.13三、192.168.2.132

1、關閉SElinux、配置防火牆

vi /etc/sysconfig/iptables  #編輯,添加如下代碼

-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 3306 -j ACCEPT #容許3306端口經過防火牆

/etc/init.d/iptables restart #重啓防火牆使配置生效

或者直接關閉防火牆

#/etc/init.d/iptables status                ## 查看防火牆狀態

#/etc/init.d/iptable stop                    ## 本次關閉防火牆

#/etc/init.d/iptable restart                ## 重啓防火牆

永久性關閉防火牆

#chkconfig --level 35 iptables off     ## 注意中間的是兩個英式小短線;重啓


2、安裝lvs軟件

安裝參考 http://www.07net01.com/linux/ipvsadm_keepalivedanzhuangcuowujiejue_73067_1361863388.html

yum install libnl* libpopt*  //安裝依賴

安裝 popt-static  //安裝依賴   http://www.linuxidc.com/Linux/2012-03/57386.htm

下載lvs,下載時候注意內核版版本 http://www.linuxvirtualserver.org/software/index.html

ln –s /usr/src/2.6.32-71.el6.x86_64    /usr/src/linux

cd ipvsadm-1.26

make && make install

3、安裝keepalived

yum install  gcc gcc-c++ make openssl-devel kernel-devel ncurses-devel  #安裝編譯工具包

下載keeplived:http://www.keepalived.org/download.html

我放在/root目錄下面

tar -zxvf keepalived-1.2.5.tar.gz

cd keepalived-1.2.5

./configure --sysconf=/etc --with-kernel-dir=/usr/src/kernels/2.6.32-573.1.1.el6.x86_64

 

make && make install

ln -s /usr/local/sbin/keepalived /sbin

 

4、安裝perl、perl-DBI、DBD-mysql模塊以及MySQL客戶端   #perl腳本鏈接MySQL數據庫須要,由於主備服務器檢測mysql的狀態是用per腳本寫的

 

yum install  perl  perl-DBI  perl-DBD-MySQL  mysql  #執行此命令安裝

測試腳本是否安裝成功

vi /tmp/test_perl.pl

#!/usr/bin/perl

print "Hello, world!\n";

perl /tmp/test_perl.pl  #運行測試腳本,若是出現:Hello,world! 說明perl安裝成功

perldoc DBI  #查看DBI模塊是否安裝

perldoc DBD::mysql   #查看DBD::mysql模塊是否安裝

5、配置keepalived

編輯keepalive的master(主)192.168.2.133配置文件    vim /etc/keepalived/keepalived.conf

global_defs {
   notification_email {
    chaosju@163.com
   }
   notification_email_from keepalived@chaos
   smtp_server 127.0.01
   smtp_connect_timeout 30
   router_id LVS_DEVEL
}

vrrp_instance VI_1 {
    state MASTER            
    interface eth0
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.2.137
    }
}

virtual_server 192.168.2.137 3306 {
    delay_loop 6       # 每隔6秒查看realserver狀態
    lb_algo lc        # 調度算法爲加權最小鏈接數
    lb_kind DR         # lvs工做模式爲DR(直接路由)模式
    nat_mask 255.255.255.0
    persistence_timeout 10  # 同一IP 的鏈接50秒內被分配到同一臺realserver(測試時建議改成0)
    protocol TCP            # 用TCP監測realserver的狀態

    real_server 192.168.2.134 3306 {       # 定義realserver
        weight 3                       # 定義權重
        MISC_CHECK {
           misc_path "/etc/keepalived/check_slave.pl 192.168.2.134"
           misc_dynamic
        }
    }
    real_server 192.168.2.135 3306 {
        weight 3
        MISC_CHECK {

           misc_path "/etc/keepalived/check_slave.pl 192.168.2.135"

            misc_dynamic

        }
    }
}

編輯keepalive的slave(從)192.168.2.132配置文件    vim /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {
   notification_email {
    chaosju@163.com
   }
   notification_email_from keepalived@chaos
   smtp_server 127.0.01
   smtp_connect_timeout 30
   router_id LVS_DEVEL
}

vrrp_instance VI_1 {
    state BACKUP
    interface eth0
    virtual_router_id 51
    priority 80
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.2.137
    }
}

virtual_server 192.168.2.137 3306 {
    delay_loop 6       # 每隔6秒查看realserver狀態
    lb_algo lc        # 調度算法爲加權最小鏈接數
    lb_kind DR         # lvs工做模式爲DR(直接路由)模式
    nat_mask 255.255.255.0
    persistence_timeout 10  # 同一IP 的鏈接50秒內被分配到同一臺realserver(測試時建議改成0)
    protocol TCP            # 用TCP監測realserver的狀態

    real_server 192.168.2.134 3306 {       # 定義realserver
        weight 3                       # 定義權重
        MISC_CHECK {
           misc_path "/etc/keepalived/check_slave.pl 192.168.2.134"
           misc_dynamic
        }
    }
    real_server 192.168.2.135 3306 {
        weight 3
        MISC_CHECK {

           misc_path "/etc/keepalived/check_slave.pl 192.168.2.135"

            misc_dynamic

        }
    }
}

6、設置主從(192.168.2.13三、192.168.2.132)監控mysql腳本check_slave.pl

vi /etc/keepalived/check_slave.pl #編輯,添加如下代碼

 

#!/usr/bin/perl -w
use DBI;
use DBD::mysql;

$SBM = 120;
$db = "chaosdb";
$host = $ARGV[0];
$port = 3306;
$user = "root";
$pw = "admin";

$query = "show slave status";

$dbh = DBI->connect("DBI:mysql:$db:$host:$port", $user, $pw, { RaiseError => 0,PrintError => 0 });

if (!defined($dbh)) {

exit 1;

}

$sqlQuery = $dbh->prepare($query);

$sqlQuery->execute;

$Slave_IO_Running =  "";

$Slave_SQL_Running = "";

$Seconds_Behind_Master = "";

while (my $ref = $sqlQuery->fetchrow_hashref()) {

$Slave_IO_Running = $ref->{'Slave_IO_Running'};

$Slave_SQL_Running = $ref->{'Slave_SQL_Running'};

$Seconds_Behind_Master = $ref->{'Seconds_Behind_Master'};

}

$sqlQuery->finish;

$dbh->disconnect();

if ( $Slave_IO_Running eq "No" || $Slave_SQL_Running eq "No" ) {

exit 1;

} else {

if ( $Seconds_Behind_Master > $SBM ) {

exit 1;

} else {

exit 0;

}

}
相關文章
相關標籤/搜索