基于Haporxy+Keepalived构建高可用负载均衡集群
1、准备四台虚拟机两台nginx 两台haproxy
2、实验如下：
基于Haporxy+Keepalived构建高可用负载均衡集群
1、准备四台虚拟机两台nginx 两台haproxy
2、两台nginx
[root@Nginx-1 ~]# yum -y install gcc gcc-c++ make pcre-devel zlib-devel
[root@Nginx-1 ~]# useradd -M -s /sbin/nologin nginx
[root@Nginx-1 ~]# tar xf nginx-1.6.2.tar.gz -C /usr/src
[root@Nginx-1 ~]# cd /usr/src/nginx-1.6.2
[root@Nginx-1 nginx-1.6.2]# ./configure --prefix=/usr/local/nginx --user=nginx --group=nginx && make && make install
[root@Nginx-1 nginx-1.6.2]# cd /usr/local/nginx/html/
nginx1 :
[root@localhost ~]# echo "111111" > /usr/local/nginx/html/index.html
[root@localhost ~]# /usr/local/nginx/sbin/nginx
nginx2 :
[root@localhost ~]# echo "222222" > /usr/local/nginx/html/index.html
[root@localhost ~]# /usr/local/nginx/sbin/nginx
安装Haproxy两台机器配置一致：
[root@Haproxy-1 ~]# yum -y install gcc gcc-c++ make pcre-devel bzip2-devel
[root@Haproxy-1 ~]# tar xf haproxy-1.4.24.tar.gz -C /usr/src/
[root@Haproxy-1 ~]# cd /usr/src/haproxy-1.4.24/
[root@Haproxy-1 haproxy-1.4.24]# make TARGET=linux26 && make install
建立haproxy的配置目录及文件
[root@Haproxy-1 haproxy-1.4.24]# mkdir /etc/haproxy
[root@Haproxy-1 haproxy-1.4.24]# cp examples/haproxy.cfg /etc/haproxy/
haproxy配置文件的修改：
[root@Haproxy-1 ~]# vim /etc/haproxy/haproxy.cfg
# this config needs haproxy-1.1.28 or haproxy-1.2.1
global
# log 127.0.0.1 local0
# log 127.0.0.1 local1 notice
log /dev/log local0 info
log /dev/log local0 notice
maxconn 4096
uid 99
gid 99
daemon
defaults
log global
mode http
option httplog
retries 3
maxconn 4096
contimeout 5000
clitimeout 50000
srvtimeout 50000
listen webcluster 0.0.0.0:80
option httpchk GET /index.html
balance roundrobin
server inst1 192.168.200.113:80 check inter 2000 fall 3 //nginx 主机
server inst1 192.168.200.114:80 check inter 2000 fall 3
listen admin_stats
bind 0.0.0.0:8000
mode http
option httplog
maxconn 100
stats refresh 30s
stats uri /stats
stats realm Crushlinux Haproxy
stats auth admin:admin
stats hide-version
创建自启动脚本
[root@Haproxy-1 ~]# cp /usr/src/haproxy-1.4.24/examples/haproxy.init /etc/init.d/haproxy
[root@Haproxy-1 ~]# ln -s /usr/local/sbin/haproxy /usr/sbin/haproxy
[root@Haproxy-1 ~]# chmod +x /etc/init.d/haproxy
[root@Haproxy-1 ~]# /etc/init.d/haproxy start
Starting haproxy: [确定]
客户端访问测试：
使用不同浏览器访问
结果不同即为成功
编译安装keepalived服务
[root@Haproxy-1 ~]# yum -y install keepalived
[root@Haproxy-1 ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
acassen@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id LVS_DEVEL
vrrp_skip_check_adv_addr
vrrp_strict
vrrp_garp_interval 0
vrrp_gna_interval 0
}
vrrp_script chk_http_port {
script "/root/check_haproxy.sh"
interval 2
weight -20
}
vrrp_instance VI_1 {
state MASTER
interface ens32
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.200.254
}
track_script {
chk_http_port
}
}
第二台Haproxy配置keepalibed 主配置文件
[root@Haproxy-2 ~]# cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
acassen@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id LVS_DEVEL
vrrp_skip_check_adv_addr
vrrp_strict
vrrp_garp_interval 0
vrrp_gna_interval 0
}
vrrp_script chk_http_port {
script "/root/check_haproxy.sh"
interval 2
weight -20
}
vrrp_instance VI_1 {
state BACKUP
interface ens32
virtual_router_id 51
priority 90
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.200.254
}
track_script {
chk_http_port
}
}
两台机器上都配置haproxy检测脚本
[root@Haproxy-1 ~]# cat /root/check_haproxy.sh
#!/bin/bash
num=$(ps -C haproxy --no-header |wc -l)
if [ $num -eq 0 ]
then
/etc/init.d/haproxy start
sleep 3
a=$(ps -C haproxy --no-header |wc -l)
if [ $a -eq 0 ]
then
systemctl stop keepalived
fi
fi
[root@Haproxy-1 ~]# chmod +x /root/check_haproxy.sh
[root@Haproxy-1 ~]# service keepalived start