2020-07-13 架构师第3周作业

▲单独架构的小伙伴看这里：（学习杰哥视频的作业第5-6天）

1、实现haproxy+keepalived集群高可用集群转发

一、实验环境：

1、haproxy+keepalived：192.168.37.101-102

2、VIP：192.168.37.200

3、web服务器：192.168.37.103-104

3.1 分别在两台web服务器安装httpd

# yum install httpd

3.2 web服务器1：192.168.37.103

# echo web1：192.168.37.103 > /var/www/html/index.html

3.3 web服务器2：192.168.37.104

# echo web2：192.168.37.104 > /var/www/html/index.html

二、修改两台haproxy+keepalived服务器系统参数，使haproxy可以绑定在不存在的IP地址，和开启IP地址转发；并使配置生效

# vim /etc/sysctl.conf

net.ipv4.ip_nonlocal_bind = 1

net.ipv4.ip_forward = 1

# sysctl -p

三、haproxy+keepalived主服务器

1、安装haproxy和keepalived

# yum install haproxy keepalived

2、配置主keepalived

# vim /etc/keepalived/keepalived.conf

global_defs {

notification_email {

root@localhost

}

notification_email_from keepalived@localhost

smtp_server 127.0.0.1

smtp_connect_timeout 30

router_id server1

vrrp_skip_check_adv_addr

vrrp_strict

vrrp_garp_interval 0

vrrp_gna_interval 0

vrrp_iptables

}

vrrp_instance VIP1{

state MASTER

interface eth0

virtual_router_id 51

priority 100

advert_int 1

authentication {

auth_type PASS

auth_pass 123456

}

virtual_ipaddress {

192.168.37.200 dev eth0 lable eth0:1

}

}

3、配置haproxy

# vim /etc/haproxy/haproxy.cfg

listen web

bind 192.168.37.200:80

server web1 192.168.37.103 weight 1 check inter 3000 fall 3 rise 5

server web1 192.168.37.104 weight 1 check inter 3000 fall 3 rise 5

四、haproxy+keepalived从服务器

1、安装haproxy和keepalived

# yum install haproxy keepalived

2、配置从keepalived

# vim /etc/keepalived/keepalived.conf

global_defs {

notification_email {

root@localhost

}

notification_email_from keepalived@localhost

smtp_server 127.0.0.1

smtp_connect_timeout 30

router_id server2

vrrp_skip_check_adv_addr

vrrp_strict

vrrp_garp_interval 0

vrrp_gna_interval 0

vrrp_iptables

}

vrrp_instance VI_1 {

state BACKUP

interface eth0

virtual_router_id 51

priority 80

advert_int 1

authentication {

auth_type PASS

auth_pass 123456

}

virtual_ipaddress {

192.168.37.200 dev eth0 lable eth0:1

}

}

3、配置haproxy

# vim /etc/haproxy/haproxy.cfg

listen web

bind 192.168.37.200:80

server web1 192.168.37.103 weight 1 check inter 3000 fall 3 rise 5

server web1 192.168.37.104 weight 1 check inter 3000 fall 3 rise 5

2、实现LVS+keepalived高可用集群。

一、实验环境：

1、lvs+keepalived：192.168.37.101-102

2、VIP：192.168.37.200

3、web服务器：192.168.37.103-104

3.1 分别在两台web服务器安装httpd

# yum install httpd

3.2 web服务器1：192.168.37.103

# echo web1：192.168.37.103 > /var/www/html/index.html

3.3 web服务器2：192.168.37.104

# echo web2：192.168.37.104 > /var/www/html/index.html

二、配置keepalived服务器（两台都要配置）

1、在 /etc/keepalived/keepalived.conf 文件内容尾增加如下代码：

include /etc/keepalived/conf.d/*.conf

2、编辑keepalived的lvs部分配置文件

# vim /etc/keepalived/conf.d/dr.conf

virtual_server 192.168.37.200 80 {

delay_loop 10

lb_algo rr

lb_kind DR

!persistence 60

protocol TCP

real_server 192.168.37.103 80 {

weight 1

TCP_CHECK {

connect_port 80

connect_timeout 3

nb_get_retry 3

delay_before_retry 3

}

}

real_server 192.168.37.104 80 {

weight 1

TCP_CHECK {

connect_port 80

connect_timeout 3

nb_get_retry 3

delay_before_retry 3

}

}

}

三、WEB服务器端操作（两台同样操作）

# vim lvs_web.sh

#!/bin/bash

vip=192.168.37.200

mask='255.255.255.255'

dev=lo:1

case $1 in

start)

echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore

echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore

echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce

echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce

ifconfig $dev $vip netmask $mask #broadcast $vip up

#route add -host $vip dev $dev

;;

stop)

ifconfig $dev down

echo 0 > /proc/sys/net/ipv4/conf/all/arp_ignore

echo 0 > /proc/sys/net/ipv4/conf/lo/arp_ignore

echo 0 > /proc/sys/net/ipv4/conf/all/arp_announce

echo 0 > /proc/sys/net/ipv4/conf/lo/arp_announce

;;

*)

echo "Usage: $(basename $0) start|stop"

exit 1

;;

esac

# bash lvs_web.sh start