Nginx+keepalived 负载均衡高可用配置CentOS6.4
Nginx+keepalived 负载均衡高可用配置CentOS6.4一：测试环境
服务器DELL-R720
系统版本：CentOS6.4 64bit
虚拟化 KVM虚拟机系统CentOS6.4 64bit
虚拟机4台：
Nginx01，nginx02，web01，web02
网络环境：
Nginx01:192.168.40.30
Nginx02:192.168.40.31
Web01:192.168.40.86
Web02:192.168.40.87
Vip：192.168.40.32
二：服务配置
1>Nginx01
#wget http://nginx.org/packages/centos/6/noarch/RPMS/nginx-release-centos-6-0.el6.ngx.noarch.rpm
#rpm -ivh nginx-release-centos-6-0.el6.ngx.noarch.rpm
#yum list |grep nginx
nginx-release-centos.noarch 6-0.el6.ngx installed
nginx.x86_64 1.2.8-1.el6.ngx nginx
nginx-debug.x86_64 1.2.8-1.el6.ngx nginx
#yum -y install nginx
#vi /etc/nginx/nginx.conf
user nginx;
worker_processes1;
error_log/var/log/nginx/error.log;
#error_log/var/log/nginx/error.lognotice;
#error_log/var/log/nginx/error.loginfo;
pid /var/run/nginx.pid;
events {
worker_connections1024;
}
http {
include /etc/nginx/mime.types;
default_typeapplication/octet-stream;
log_formatmain'$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';
access_log/var/log/nginx/access.logmain;
sendfile on;
#tcp_nopush on;
#keepalive_timeout0;
keepalive_timeout65;
#gzipon;
# Load config files from the /etc/nginx/conf.d directory
# The default server is in conf.d/default.conf
include /etc/nginx/conf.d/*.conf;
upstreamtest{
server 192.168.40.86;
server 192.168.40.87;
}
server{
listen80;
server_name192.168.40.32;
location / {
proxy_pass http://test;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For$proxy_add_x_forwarded_for;
}
}
}
>Keepalived 配置信息
#vi /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 192.168.200.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_script chk_http_port {
script "/opt/nginx_pid.sh" #nginx 服务检测脚本
interval 2
weight 2
}
vrrp_instance VI_1 {
state MASTER #nginx02修改为BACKUP
interface eth0
virtual_router_id 55
priority 100 #nginx02 修改为 80低于MASTER即可
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
track_script { #指定一下检测的脚本http_port
http_port
}
virtual_ipaddress {
192.168.40.32
}
}
2>付上nginx服务检测脚本
# vi /opt/nginx_pid.sh
#!/bin/bash
A=`ps -C nginx --no-header |wc -l`
if [ $A -eq 0 ];then
/etc/init.d/nginx start
sleep 3
if [ `ps -C nginx --no-header |wc -l` -eq 0 ];then
killall keepalived
fi
fi
3>nginx02配置与01相同，keepalived稍作修改
4>启动nginx01 02 上的nginx 和keepalived服务
三：测试
1>负载均衡测试
http://songxj.blog.运维网.com/attachment/201304/7/620981_1365307327lBRd.jpg
刷新
http://songxj.blog.运维网.com/attachment/201304/7/620981_1365307327hcv1.jpg
Down掉40.86这台web再测试只有87这台web响应。
2>HA 测试
Ip a 结果显示vip在nginx01上
# ip a
1: lo:mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0:mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 52:54:00:57:3b:80 brd ff:ff:ff:ff:ff:ff
inet 192.168.40.30/24 brd 192.168.40.255 scope global eth0
inet 192.168.40.32/32 scope global eth0
inet6 fe80::5054:ff:fe57:3b80/64 scope link
valid_lft forever preferred_lft forever
移动01这台nginx的配置文件然后down掉nginx服务，使其nginx服务不能启动
#/etc/init.d/nginx status
nginx is stopped
然后ip a发现VIP地址已经飘到nginx02上去了
# ip a
1: lo:mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0:mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 52:54:00:95:45:5f brd ff:ff:ff:ff:ff:ff
inet 192.168.40.31/24 brd 192.168.40.255 scope global eth0
inet 192.168.40.32/32 scope global eth0
inet6 fe80::5054:ff:fe95:455f/64 scope link
valid_lft forever preferred_lft forever
页:
[1]