LVS+keepalived+DRBD+heartbeat+mysql-原创手记-慕课网

wKiom1XQKIaC4YcsAAH6io_UKl8752.jpg

IP地址规划：

LVS：

10.1.1.23 主LVS+keepalived

10.1.1.22 备LVS+keepalived

主mysql：

10.1.1.5 DRBD+heartbeat

10.1.1.6 DRBD+heartbeat

10.1.1.7 VIP（heartbeat）

10.1.1.10 VIP（lvs）

从mysql+nginx：

10.1.1.102 Ng+php

VIP1：10.1.1.8 （nginx）

VIP2: 10.1.1.9 （mysql）

安装DRBD+mysql+heartbeat

安装DRBD

1.1.规划

10.1.1.5（主） /data

10.1.1.6（备） /data

2.安装（主备安装一致）：

2.1 安装依赖:

yum install kernel-devel kernel-headers

2.2.编译安装

tar -zxf drbd-8.3.16.tar.gz

./configure --prefix=/usr/local/drbd --with-km

make && make install

2.3 拷贝配置文件模板

mv /usr/local/drbd/etc/drbd.conf /usr/local/drbd/drbd.conf.old

cp /tmp/soft/drbd-8.3.16/scripts/drbd.conf.exampl /usr/local/drbd/etc/drbd.conf

2.4 设置链接

ln -s /usr/local/drbd/etc/drbd.conf /etc/drbd.conf

ln -s /usr/local/drbd/etc/rc.d/init.d/drbd /etc/init.d/drbd

3.配置文件（主备一致）：

global {

usage-count no;

}

common {

syncer { rate 200M; }

}

resource r0 {

protocol C;

handlers {

pri-on-incon-degr "/usr/lib/drbd/notify-pri-on-incon-degr.sh; /usr/lib/drbd/notify-emergency-reboot.sh; echo b > /proc/sysrq-trigger ; reboot -f";

pri-lost-after-sb "/usr/lib/drbd/notify-pri-lost-after-sb.sh; /usr/lib/drbd/notify-emergency-reboot.sh; echo b > /proc/sysrq-trigger ; reboot -f";

local-io-error "/usr/lib/drbd/notify-io-error.sh; /usr/lib/drbd/notify-emergency-shutdown.sh; echo o > /proc/sysrq-trigger ; halt -f";

fence-peer "/usr/lib/heartbeat/drbd-peer-outdater -t 5";

pri-lost "/usr/lib/drbd/notify-pri-lost.sh; /usr/lib/drbd/notify-emergency-reboot.sh; echo b > /proc/sysrq-trigger ; reboot -f";

split-brain "/usr/lib/drbd/notify-split-brain.sh root";

out-of-sync "/usr/lib/drbd/notify-out-of-sync.sh root";

}

startup {

degr-wfc-timeout 120;

outdated-wfc-timeout 2;

}

disk {

on-io-error detach;

fencing resource-only;

}

net {

cram-hmac-alg "sha1";

shared-secret "ckl893";

}

on ckl-bd1 {

device /dev/drbd0;

disk /dev/sda5;

address 10.1.1.5:7788;

flexible-meta-disk internal;

}

on ckl-bd2 {

device /dev/drbd0;

disk /dev/sda5;

address 10.1.1.6:7788;

meta-disk internal;

}

4.创建数据块：

（主备一致）

#dd if=/dev/zero bs=1M count=1 of=/dev/sda5;sync

#drbdadm create-md r0

5.启动DRBD服务

#umount /data

#/etc/init.d/drdb start

6.配置主服务，格式化DRBD（10.1.1.5）：

#drbdsetup /dev/drbd1 primary –o

# mkfs.ext4 /dev/drbd0

7.主挂载DRBD，创建文件（10.1.1.5）：

#mount /dev/drbd0 /mnt

#cd /mnt

#touch nihao.txt

8.测试同步：

停掉主(10.1.1.5):

#/etc/init.d/drbd stop

从设置为主（10.1.1.6）:

#drbdsetup /dev/drbd1 primary –o

# mount /dev/drbd0 /mnt

#cd /mnt

# ll nihao.txt

-rw-r--r-- 1 root root 0 May 7 10:42 nihao.txt

9.切换回来：

10.1.1.6上执行：

#umount /mnt

#drbdadm secondary all

10.1.1.5 上执行：

#drbdadm primary all

# mount /dev/drbd0 /mnt

安装mysql

1.mysql安装规划：

10.1.1.5（主）：/mnt DRBD挂载的分区

10.1.1.6（备）

2.首先启动主DRBD（10.1.1.5）挂载DRBD到/mnt

安装mysql到/mnt 下

3.备（10.1.1.6）切换到主，挂载DRBD 到/mnt

安装mysql到/mnt 下

4.切换回

10.1.1.5主

10.1.1.6备

安装heartbeat

规划：10.1.1.5 （主）

10.1.1.6 （备）

10.1.1.7 （heartbeat VIP）

主备安装一致：

1.安装heartbeat 下载需要的源：

wget ftp://mirror.switch.ch/pool/1/mirror/scientificlinux/6rolling/x86_64/os/Packages/epel-release-6-5.noarch.rpm

2.安装heartbeat：

yum -y install heartbeat*

3.配置heartbeat

3.1.拷贝模板配置文件：

cp /usr/share/doc/heartbeat-3.0.4/ha.cf /etc/ha.d/

cp /usr/share/doc/heartbeat-3.0.4/authkeys /etc/ha.d/

cp /usr/share/doc/heartbeat-3.0.4/haresources /etc/ha.d/

4.heartbeat主配置文件（主备一致）：

cat /etc/ha.d/ha.cf

logfile /var/log/ha-log

logfacility local0

keepalive 2

deadtime 30

warntime 10

initdead 120

udpport 694

baud 19200

bcast eth0

auto_failback on

watchdog /dev/watchdog

node ckl-bd1

node ckl-bd2

ping 10.1.1.1

respawn hacluster /usr/lib64/heartbeat/ipfail

apiauth ipfail gid=haclient uid=hacluster

5.heartbeat认证文件(主备一致）：

cat /etc/ha.d/authkeys

auth 1

1 sha1 ckl893!

6.资源文件

10.1.1.5（主）：

# cat /etc/ha.d/haresources

ckl-bd1 drbddisk::r0 Filesystem::/dev/drbd0::/mnt mysql IPaddr::10.1.1.7/24/eth0:1

10.1.1.6（备）：

# cat /etc/ha.d/haresources

ckl-bd2 drbddisk::r0 Filesystem::/dev/drbd0::/mnt mysql IPaddr::10.1.1.7/24/eth0:1

drbdisk脚本需要添加到/etc/ha.d/resource.d 下

7.测试heartbeat+mysql+DRBD

主，停掉mysql，停掉heartbeat

从监测到后，挂载DRBD，启动mysql

配置mysql主从同步

10.1.1.107 主

10.1.1.102 从

10.1.1.103 从

配置简单略过

安装LVS

1.安装lvs

10.1.1.23

10.1.1.22

执行同样操作：

1.1.安装需要包：

yum -y install popt popt-devel popt-static libnl libnl-devel

1.2.lvs在2.4之后内核自带，查看是否已经存在：

# cat /boot/config-2.6.32-573.el6.x86_64 | grep -i -A 15 "ipvs"

# IPVS transport protocol load balancing support

CONFIG_IP_VS_PROTO_TCP=y

CONFIG_IP_VS_PROTO_UDP=y

CONFIG_IP_VS_PROTO_AH_ESP=y

CONFIG_IP_VS_PROTO_ESP=y

CONFIG_IP_VS_PROTO_AH=y

CONFIG_IP_VS_PROTO_SCTP=y

# IPVS scheduler

CONFIG_IP_VS_RR=m

CONFIG_IP_VS_WRR=m

CONFIG_IP_VS_LC=m

CONFIG_IP_VS_WLC=m

CONFIG_IP_VS_LBLC=m

CONFIG_IP_VS_LBLCR=m

CONFIG_IP_VS_DH=m

CONFIG_IP_VS_SH=m

CONFIG_IP_VS_SED=m

CONFIG_IP_VS_NQ=m

# IPVS application helper

CONFIG_IP_VS_FTP=m

CONFIG_IP_VS_PE_SIP=m

# IP: Netfilter Configuration

CONFIG_NF_DEFRAG_IPV4=m

CONFIG_NF_CONNTRACK_IPV4=m

# CONFIG_NF_CONNTRACK_PROC_COMPAT is not set

CONFIG_IP_NF_QUEUE=m

CONFIG_IP_NF_IPTABLES=m

CONFIG_IP_NF_MATCH_ADDRTYPE=m

CONFIG_IP_NF_MATCH_AH=m

CONFIG_IP_NF_MATCH_ECN=m

1.3.说明ipvs：

IPVS transport protocol：ipvs支持的协议，tcp、udp、ah、esp、sctp

ipvs scheduler：ipvs调度模式，RR、WRR、LC、WLC、LBLC、LBLCR、DH、SH、SED、NQ

1.4.安装lvsadmin(lvs管理工具）：

tar -zxvf ipvsadm-1.26.tar.gz

cd ipvsadm-1.26

make && make install

2.安装keepalived

2.1.安装需要包：

yum -y install openssl-devel popt-devel libnl* libpopt* popt-static

ln -s /usr/src/kernels/2.6.32-279.el6.x86_64/ /usr/src/linux

2.2.安装lvs

tar -zxvf keepalived-1.2.4.tar.gz

cd keepalived-1.2.4

./configure --prefix=/usr --exec-prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin --sysconfdir=/etc --datadir=/usr/share --includedir=/usr/include --libdir=/usr/lib64 --libexecdir=/usr/libexec --localstatedir=/var --mandir=/usr/share/man --infodir=/usr/share/info --sharedstatedir=/usr/com --with-kernel-dir=/usr/src/linux

make && make install

3.配置keepalived

3.1.在10.1.1.23 上配置：

# vi /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {

notification_email {

kangly@cosyjoy.com

}

notification_email_from Alexandre.Cassen@firewall.loc

smtp_server 10.1.1.23

smtp_connect_timeout 30

router_id LVS_MASTER

}

vrrp_instance VI_1 {

state MASTER

interface eth0

virtual_router_id 77

priority 100

advert_int 1

authentication {

auth_type PASS

auth_pass ckl893

}

virtual_ipaddress {

10.1.1.8/24 #nginx VIP

10.1.1.9/24 #mysql slave VIP

10.1.1.10/24 #mysql 主VIP

}

virtual_server 10.1.1.8 80 {

delay_loop 6

lb_algo rr

lb_kind DR

persistence_timeout 50

protocol TCP

real_server 10.1.1.102 80 {

weight 1

TCP_CHECK {

connect_timeout 10

nb_get_retry 3

delay_before_retry 3

}

real_server 10.1.1.103 80 {

weight 1

TCP_CHECK {

connect_timeout 3

nb_get_retry 3

delay_before_retry 3

}

virtual_server 10.1.1.9 3306 {

delay_loop 30

lb_algo rr

lb_kind DR

persistence_timeout 120

protocol TCP

real_server 10.1.1.102 3306 {

weight 1

MISC_CHECK {

misc_path "/etc/keepalived/check_slave.pl 10.1.1.102"

misc_dynamic

}

real_server 10.1.1.103 3306 {

weight 1

MISC_CHECK {

misc_path "/etc/keepalived/check_slave.pl 10.1.1.103"

misc_dynamic

}

3.2.配置备lvs

在10.1.1.22 上：

主从配置文件不一致

state BACKUP 状态为备份

priority 90 优先级小于主

4.本地添加VIP脚本：

10.1.1.5

10.1.1.6

# cat /etc/init.d/lvsrs

#!/bin/bash

#description : start realserver

VIP=10.1.1.10

. /etc/rc.d/init.d/functions

case "$1" in

start)

echo " start LVS of REALServer"

/sbin/ifconfig lo:0 $VIP broadcast $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

;;

stop)

/sbin/ifconfig lo:0 down

echo "close LVS REALserver"

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 "Usage: $0 {start|stop}"

exit 1

esac

5.本地添加ip脚本：

10.1.1.102

10.1.1.103

#!/bin/bash

#description : start realserver

VIP1=10.1.1.8

VIP2=10.1.1.9

. /etc/rc.d/init.d/functions

case "$1" in

start)

echo " start LVS of REALServer"

/sbin/ifconfig lo:0 $VIP1 broadcast $VIP1 netmask 255.255.255.255 up

/sbin/ifconfig lo:1 $VIP2 broadcast $VIP2 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

;;

stop)

/sbin/ifconfig lo:0 down

echo "close LVS REALserver"

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 "Usage: $0 {start|stop}"

exit 1

esac

arp相关参数说明：

arp_annonuce（是否将本机地址网络通过arp通告给其它网络）：

0：通告本机所有地址接口的网络。

1：尽量只通告本接口地址的网络。

2：只通告连接本地借口地址网络。

arg_ignore（是否响应其它的arp请求）：

0：在接受到请求后，将本地所有地址响应出去。

1：请求报文从哪个接口进入，就必须使用此接口配置的地址才能响应。

6.mysql 同步检测脚本：

注意事项：执行用户必须有show slave status 权限

# cat check_slave.pl

#!/usr/bin/perl -w

use DBI;

use DBD::mysql;

$SBM = 120;

$db = "cookbook";

$host = $ARGV[0];

$port = 3306;

$user = "root";

$pw = 'yiqu@123'; #这里是单引号，因为有@

$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 gt $SBM ) {

exit 1;

} else {

exit 0;

}

7.启动LVS

# /etc/init.d/keepalived start

查看LVS路由表信息：

#ipvsadm -Ln

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

-> RemoteAddress:Port Forward Weight ActiveConn InActConn

TCP 10.1.1.8:80 rr persistent 50

-> 10.1.1.102:80 Route 1 0 0

-> 10.1.1.103:80 Route 1 0 0

TCP 10.1.1.9:3306 rr persistent 120

-> 10.1.1.102:3306 Route 124 0 0

-> 10.1.1.103:3306 Route 124 0 0

TCP 10.1.1.10:3306 rr persistent 120

-> 10.1.1.7:3306 Route 1 0 0

8.测试web

停掉：10.1.1.102 nginx

# /etc/init.d/nginx stop

查看LVS路由表信息：

# ipvsadm -Ln

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

-> RemoteAddress:Port Forward Weight ActiveConn InActConn

TCP 10.1.1.8:80 rr persistent 50

-> 10.1.1.103:80 Route 1 0 0

TCP 10.1.1.9:3306 rr persistent 120

-> 10.1.1.102:3306 Route 124 0 0

-> 10.1.1.103:3306 Route 124 0 0

TCP 10.1.1.10:3306 rr persistent 120

-> 10.1.1.7:3306 Route 1 0 0

路由表删除了10.1.1.102 的信息;

启动10.1.1.102 nginx

# /etc/init.d/nginx start

查看LVS路由表信息：

# ipvsadm -Ln

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

-> RemoteAddress:Port Forward Weight ActiveConn InActConn

TCP 10.1.1.8:80 rr persistent 50

-> 10.1.1.102:80 Route 1 0 0

-> 10.1.1.103:80 Route 1 0 0

TCP 10.1.1.9:3306 rr persistent 120

-> 10.1.1.102:3306 Route 124 0 0

-> 10.1.1.103:3306 Route 124 0 0

TCP 10.1.1.10:3306 rr persistent 120

-> 10.1.1.7:3306 Route 1 0 0

9.测试mysql读

停止10.1.1.102 mysql

# /etc/init.d/mysqld stop

查看路由表信息：

# ipvsadm -Ln

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

-> RemoteAddress:Port Forward Weight ActiveConn InActConn

TCP 10.1.1.8:80 rr persistent 50

-> 10.1.1.102:80 Route 1 0 0

-> 10.1.1.103:80 Route 1 0 0

TCP 10.1.1.9:3306 rr persistent 120

-> 10.1.1.103:3306 Route 124 0 0

TCP 10.1.1.10:3306 rr persistent 120

-> 10.1.1.7:3306 Route 1 0 0

已经剔除了10.1.1.102 mysql

启动10.1.1.102 mysql

# /etc/init.d/mysqld start

查看路由表信息：

# ipvsadm -Ln

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

-> RemoteAddress:Port Forward Weight ActiveConn InActConn

TCP 10.1.1.8:80 rr persistent 50

-> 10.1.1.102:80 Route 1 0 0

-> 10.1.1.103:80 Route 1 0 0

TCP 10.1.1.9:3306 rr persistent 120

-> 10.1.1.103:3306 Route 124 0 0

TCP 10.1.1.10:3306 rr persistent 120

-> 10.1.1.7:3306 Route 1 0 0

测试检测同步脚本：

停掉10.1.1.102 同步：

>slave stop；

查看路由表信息：

# ipvsadm -Ln

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

-> RemoteAddress:Port Forward Weight ActiveConn InActConn

TCP 10.1.1.8:80 rr persistent 50

-> 10.1.1.102:80 Route 1 0 0

-> 10.1.1.103:80 Route 1 0 0

TCP 10.1.1.9:3306 rr persistent 120

-> 10.1.1.103:3306 Route 124 0 0

TCP 10.1.1.10:3306 rr persistent 120

-> 10.1.1.7:3306 Route 1 0 0

启动同步

>slave start；

查看路由表信息：

# ipvsadm -Ln

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

-> RemoteAddress:Port Forward Weight ActiveConn InActConn

TCP 10.1.1.8:80 rr persistent 50

-> 10.1.1.102:80 Route 1 0 0

-> 10.1.1.103:80 Route 1 0 0

TCP 10.1.1.9:3306 rr persistent 120

-> 10.1.1.103:3306 Route 124 0 0

TCP 10.1.1.10:3306 rr persistent 120

-> 10.1.1.7:3306 Route 1 0 0

错误信息：

[root@localhost keepalived]# tail -f /var/log/messages

May 6 11:00:03 localhost Keepalived_vrrp[4233]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 10.1.1.8

May 6 11:00:10 localhost Keepalived_vrrp[4233]: receive an invalid ip number count associated with VRID!

May 6 11:00:10 localhost Keepalived_vrrp[4233]: bogus VRRP packet received on eth0 !!!

May 6 11:00:10 localhost Keepalived_vrrp[4233]: VRRP_Instance(VI_1) Dropping received VRRP packet...

May 6 11:00:11 localhost Keepalived_vrrp[4233]: receive an invalid ip number count associated with VRID!

解决办法：修改virtual_router_id 51 为另一个值，如：virtual_router_id 77

change master to master_host='10.1.1.7',master_port=3306,master_user='repl',master_password='slavepass',master_log_file='mysql-bin.000017',master_log_pos=881;

perl Can't locate DBI.pm

yum -y install perl perl-DBI perl-DBD-MySQL