debian下完成 haproxy +keepalived 高可用web集群架构
准备机器
harpoxy_MASTER - 172.16.8.129
haproxy_BACKUP - 172.16.8.130
WEB_APP_SERVER_1 - 172.16.8.131
WEB_APP_SERVER_2 - 172.16.8.132
注:
virtual server: 172.16.8.252 (非真实机器, 只需要在web app server上配下这个IP)
所有机器都安装的Debian 7.5 (wheezy)
安装软件
haproxy_MASTER上安装配置haproxy和keepalived
$ ssh haproxy_MASTER
$ sudo bash -c "echo 'deb http://ftp.debian.org/debian/ wheezy-backports main' >> /etc/apt/sources.list"
$ sudo apt-get update
$ sudo apt-get install haproxy keepalived
配置haproxy
$ cat /etc/haproxy/haproxy.cfg
global
log 127.0.0.1 local0 notice
maxconn 2000
chroot /var/lib/haproxy
user haproxy
group haproxy
daemon
defaults
log global
mode http
optionhttplog
optiondontlognull
optionredispatch
contimeout 5000
clitimeout 50000
srvtimeout 50000
retries 3
errorfile 400 /etc/haproxy/errors/400.http
errorfile 403 /etc/haproxy/errors/403.http
errorfile 408 /etc/haproxy/errors/408.http
errorfile 500 /etc/haproxy/errors/500.http
errorfile 502 /etc/haproxy/errors/502.http
errorfile 503 /etc/haproxy/errors/503.http
errorfile 504 /etc/haproxy/errors/504.http
listen webserver 0.0.0.0:80
mode http
stats enable
stats uri /haproxy?stats
stats realm Strictly\ Private
stats auth admin:admin
balance roundrobin
#option httpclose
option http-server-close
timeout http-keep-alive 3000
option forwardfor
cookie SRVNAME insert
server app1 172.16.8.131:80 cookie S1 check
server app2 172.16.8.132:80 cookie S2 check
配置keepalived
$ cat /etc/keepalived/keepalived.conf
global_defs {
router_id LVS_MASTER #BACKUP上修改为LVS_BACKUP
}
vrrp_instance VI_1 {
state MASTER #BACKUP上修改为BACKUP
interface eth0
virtual_router_id 51#与备机的id必须一致
priority 100 #BACKUP上修改为80
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
172.16.8.252 #virtual server
}
}
haproxy_BACKUP上安装配置haproxy和keepalived
$ ssh haproxy_BACKUP
$ sudo bash -c "echo 'deb http://ftp.debian.org/debian/ wheezy-backports main' >> /etc/apt/sources.list"
$ sudo apt-get update
$ sudo apt-get install haproxy keepalived
配置haproxy
$ cat /etc/haproxy/haproxy.cfg
global
log 127.0.0.1 local0 notice
maxconn 2000
chroot /var/lib/haproxy
user haproxy
group haproxy
daemon
defaults
log global
mode http
optionhttplog
optiondontlognull
optionredispatch
contimeout 5000
clitimeout 50000
srvtimeout 50000
retries 3
errorfile 400 /etc/haproxy/errors/400.http
errorfile 403 /etc/haproxy/errors/403.http
errorfile 408 /etc/haproxy/errors/408.http
errorfile 500 /etc/haproxy/errors/500.http
errorfile 502 /etc/haproxy/errors/502.http
errorfile 503 /etc/haproxy/errors/503.http
errorfile 504 /etc/haproxy/errors/504.http
listen webserver 0.0.0.0:80
mode http
stats enable
stats uri /haproxy?stats
stats realm Strictly\ Private
stats auth admin:admin
balance roundrobin
#option httpclose
option http-server-close
timeout http-keep-alive 3000
option forwardfor
cookie SRVNAME insert
server app1 172.16.8.131:80 cookie S1 check
server app2 172.16.8.132:80 cookie S2 check
配置keepalived
$ cat /etc/keepalived/keepalived.conf
global_defs {
router_id LVS_BACKUP #BACKUP上修改为LVS_BACKUP
}
vrrp_instance VI_1 {
state BACKUP #BACKUP上修改为BACKUP
interface eth0
virtual_router_id 51#与备机的id必须一致
priority 80 #BACKUP上修改为80
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
172.16.8.252 #virtual server
}
}
配置WEB_APP_SERVER_1
安装nginx
$ ssh WEB_APP_SERVER_1
$ sudo apt-get install nginx
$ sudo bash -c 'echo "Web App Server 1" > /usr/share/nginx/www/index.html'
配置IP
$ sudo ifconfig eth0:0 172.16.8.252 netmask 255.255.255.255 up
修改配置文件 （上面的配置重启后需要重新输入命令）
$ cat /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo
auto eth0
auto eth0:0
iface lo inet loopback
# The primary network interface
allow-hotplug eth0
#iface eth0 inet dhcp
iface eth0 inet static
address 172.16.8.131
netmask 255.255.255.0
gateway 172.16.8.2
iface eth0:0 inet static
address 172.16.8.252
netmask 255.255.255.255
gateway 172.16.8.2
配置WEB_APP_SERVER_2
安装nginx
$ ssh WEB_APP_SERVER_2
$ sudo apt-get install nginx
$ sudo bash -c 'echo "Web App Server 2" > /usr/share/nginx/www/index.html'
配置IP
$ sudo ifconfig eth0:0 172.16.8.252 netmask 255.255.255.255 up
修改配置文件 （上面的配置重启后需要重新输入命令）
$ cat /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo
auto eth0
auto eth0:0
iface lo inet loopback
# The primary network interface
allow-hotplug eth0
#iface eth0 inet dhcp
iface eth0 inet static
address 172.16.8.132
netmask 255.255.255.0
gateway 172.16.8.2
iface eth0:0 inet static
address 172.16.8.252
netmask 255.255.255.255
gateway 172.16.8.2
启动haproxy, keepalived
$ ssh haproxy_MASTER
$ sudo service haproxy restart
$ sudo service keepalived restart
$ ssh haproxy_BACKUP
$ sudo service haproxy restart
$ sudo service keepalived restart
测试
查看服务器状态
$ while true; do curl 172.16.8.252; curl 172.16.8.252; sleep 1; done
Web App Server 1
Web App Server 2
Web App Server 1
Web App Server 2
...
查看haproxy状态
用/etc/haproxy/haproxy.cfg中的用户名、密码登录 http://172.16.8.129/haproxy?stats
关闭haproxy_MASTER查看web服务是否正常工作
$ ssh haproxy_MASTER
$ sudo shutdown -h now
$ while true; do curl 172.16.8.252; curl 172.16.8.252; sleep 1; done
Web App Server 1
Web App Server 2
Web App Server 1
Web App Server 2
...
关闭WEB_APP_SERVER_1查看web服务是否正常工作
$ ssh WEB_APP_SERVER_1
$ sudo shutdown -h now
$ while true; do curl 172.16.8.252; curl 172.16.8.252; sleep 1; done
Web App Server 2
Web App Server 2
Web App Server 2
Web App Server 2
...
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