LVS+keepalived+DRBD+heartbeat+mysql
IP地址规划：
LVS：
10.1.1.23 主LVS+keepalived
10.1.1.22 备LVS+keepalived
主mysql：
10.1.1.5DRBD+heartbeat
10.1.1.6DRBD+heartbeat
10.1.1.7VIP（heartbeat）
10.1.1.10 VIP（lvs）
从mysql+nginx：
10.1.1.102 Ng+php
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outdated-wfc-timeout 2;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-diskinternal;
}
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 May7 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 LVSofREALServer"
/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 LVSofREALServer"
/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;
$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
TCP10.1.1.8:80 rr persistent 50
-> 10.1.1.102:80 Route 1 0 0
-> 10.1.1.103:80 Route 1 0 0
TCP10.1.1.9:3306 rr persistent 120
-> 10.1.1.102:3306 Route 124 0 0
-> 10.1.1.103:3306 Route 124 0 0
TCP10.1.1.10:3306 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
TCP10.1.1.8:80 rr persistent 50
-> 10.1.1.103:80 Route 1 0 0
TCP10.1.1.9:3306 rr persistent 120
-> 10.1.1.102:3306 Route 124 0 0
-> 10.1.1.103:3306 Route 124 0 0
TCP10.1.1.10:3306 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
TCP10.1.1.8:80 rr persistent 50
-> 10.1.1.102:80 Route 1 0 0
-> 10.1.1.103:80 Route 1 0 0
TCP10.1.1.9:3306 rr persistent 120
-> 10.1.1.102:3306 Route 124 0 0
-> 10.1.1.103:3306 Route 124 0 0
TCP10.1.1.10:3306 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
TCP10.1.1.8:80 rr persistent 50
-> 10.1.1.102:80 Route 1 0 0
-> 10.1.1.103:80 Route 1 0 0
TCP10.1.1.9:3306 rr persistent 120
-> 10.1.1.103:3306 Route 124 0 0
TCP10.1.1.10:3306 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
TCP10.1.1.8:80 rr persistent 50
-> 10.1.1.102:80 Route 1 0 0
-> 10.1.1.103:80 Route 1 0 0
TCP10.1.1.9:3306 rr persistent 120
-> 10.1.1.103:3306 Route 124 0 0
TCP10.1.1.10:3306 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
TCP10.1.1.8:80 rr persistent 50
-> 10.1.1.102:80 Route 1 0 0
-> 10.1.1.103:80 Route 1 0 0
TCP10.1.1.9:3306 rr persistent 120
-> 10.1.1.103:3306 Route 124 0 0
TCP10.1.1.10:3306 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
TCP10.1.1.8:80 rr persistent 50
-> 10.1.1.102:80 Route 1 0 0
-> 10.1.1.103:80 Route 1 0 0
TCP10.1.1.9:3306 rr persistent 120
-> 10.1.1.103:3306 Route 124 0 0
TCP10.1.1.10:3306 rr persistent 120
-> 10.1.1.7:3306 Route 1 0 0 错误信息：
# tail -f /var/log/messages
May6 11:00:03 localhost Keepalived_vrrp: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 10.1.1.8
May6 11:00:10 localhost Keepalived_vrrp: receive an invalid ip number count associated with VRID!
May6 11:00:10 localhost Keepalived_vrrp: bogus VRRP packet received on eth0 !!!
May6 11:00:10 localhost Keepalived_vrrp: VRRP_Instance(VI_1) Dropping received VRRP packet...
May6 11:00:11 localhost Keepalived_vrrp: 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-DBIperl-DBD-MySQL
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