实战安装 nginx+keepalvied 实现负载均衡和高可用

标签：nginx负责均衡 upstream keepalived高可用

1. 两台机器都需要安装nginx和keepalivd

环境配置

[root@nginxproxy1 ~]# cat /etc/redhat-release 

CentOS release 6.8 (Final)

[root@nginxproxy1 ~]# uname -r

2.6.32-642.6.1.el6.x86_64

软件

nginx-1.6.2.tar.gz keepalived-1.1.19.tar.gz

                                      信息列表

#vip  设置在keepalived的配置文件里 10.89.3.168 

1.1安装nginx

安装pcre

yum install pcre pcre-devel -y

#安装openssl 

yum install openssl openssl-devel -y

#新建nginx用户

useradd nginx -s /sbin/nologin -M

#安装

tar -zxvf nginx-1.6.2.tar.gz

cd nginx-1.6.2

./configure \

--user=nginx \

--group=nginx \

--prefix=/application/nginx1.6.2 \

--with-http_stub_status_module \

--with-http_ssl_module

make && make install

#创建软连接

cd ../

ln -s /application/nginx1.6.2/ /application/nginx  

#检查语法

/application/nginx/sbin/nginx -t   

nginx: the configuration file /application/nginx1.6.2/conf/nginx.conf syntax is ok

nginx: configuration file /application/nginx1.6.2/conf/nginx.conf test is successful

# 启动nginx

[root@nginxproxy1 tools]# /application/nginx/sbin/nginx

#查看端口，看是否启动了

[root@nginxproxy1 tools]# netstat -lntup |grep nginx

tcp        0      0 0.0.0.0:80                  0.0.0.0:*                   LISTEN      8718/nginx

[root@nginxproxy1 tools]# lsof -i :80

COMMAND  PID  USER   FD   TYPE DEVICE SIZE/OFF NODE NAME

nginx   8718  root    6u  IPv4  18680      0t0  TCP *:http (LISTEN)

nginx   8719 nginx    6u  IPv4  18680      0t0  TCP *:http (LISTEN)

1.2 安装keepalived

cd /home/alvin/tools/

ln -s /usr/src/kernels/2.6.32-642.6.1.el6.x86_64 /usr/src/linux

yum install openssl openssl-devel -y

#上传keepalived-1.1.19.tar.gz

tar xf keepalived-1.1.19.tar.gz

cd keepalived-1.1.19

./configure

-----------------------

有3个Yes就表示configure OK

config.status: creating keepalived/check/Makefile

config.status: creating keepalived/libipvs-2.6/Makefile

Keepalived configuration

------------------------

Keepalived version       : 1.1.19

Compiler                 : gcc

Compiler flags           : -g -O2

Extra Lib                : -lpopt -lssl -lcrypto 

Use IPVS Framework       : Yes

IPVS sync daemon support : Yes

Use VRRP Framework       : Yes

Use Debug flags          : No

[root@nginxproxy1 keepalived-1.1.19]# 

-----------------------

make

make install

#配置规范启动

/bin/cp /usr/local/etc/rc.d/init.d/keepalived /etc/init.d/

/bin/cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/

mkdir /etc/keepalived -p

/bin/cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/

/bin/cp /usr/local/sbin/keepalived /usr/sbin/

/etc/init.d/keepalived start

ps -ef|grep keep

root       3483   1365  0 14:56 pts/0    00:00:00 grep keep

--------------------------------

#有3个keepalived -D表示成功

[root@nginxproxy1 keepalived-1.1.19]# /etc/init.d/keepalived start

Starting keepalived:                                       [  OK  ]

[root@nginxproxy1 keepalived-1.1.19]# ps -ef|grep keep

root       6342      1  0 17:42 ?        00:00:00 keepalived -D

root       6344   6342  0 17:42 ?        00:00:00 keepalived -D

root       6345   6342  0 17:42 ?        00:00:00 keepalived -D

root       6347   3490  0 17:42 pts/0    00:00:00 grep keep

--------------------------------------------------------------

如果报:configure:error:Popt librarics is required  则：

yum install popt* -y

-------------------------------------------

#打开内核转发

vi /etc/sysctl.conf

# Controls IP packet forwarding

net.ipv4.ip_forward = 1

sysctl -p

---------------------------------

1.3 nginxproxy1 keepalived 配置文件设置

cd /etc/keepalived/

cat keepalived.conf

! Configuration File for keepalived

global_defs {

   notification_email {

   114653379@qq.com

   }

   notification_email_from Alexandre.Cassen@firewall.loc

   smtp_server 10.0.0.1

   smtp_connect_timeout 30

   router_id keepalvied_1

}

vrrp_instance VI_1 {

    state MASTER

    interface eth0

    virtual_router_id 55

    priority 150

    advert_int 1

    authentication {

        auth_type PASS

        auth_pass 1111

    }

    virtual_ipaddress {

        10.89.3.168/24

    }

}

virtual_server 10.89.3.168 80 {

    delay_loop 6

    lb_algo wrr

    lb_kind DR

    nat_mask 255.255.255.0

    persistence_timeout 300

    protocol TCP

#ipvsadm -A -t 10.89.3.168 -s wrr -p 20

    real_server 10.89.3.100 80 {

        weight 1

        TCP_CHECK {

        connect_timeout 8

        nb_get_retry 3

        delay_before_retry 3

        connect_port 80

        }

  }

    real_server 10.89.3.101 80 {

        weight 1

        TCP_CHECK {

        connect_timeout 8

        nb_get_retry 3

        delay_before_retry 3

        connect_port 80

        }

  }

}

#另外一台nginxproxy2,keepalived 配置文件设置

[root@nginxproxy2 ~]# cd /etc/keepalived/

[root@nginxproxy2 keepalived]# cat keepalived.conf

! Configuration File for keepalived

global_defs {

   notification_email {

   114653379@qq.com

   }

   notification_email_from Alexandre.Cassen@firewall.loc

   smtp_server 10.0.0.1

   smtp_connect_timeout 30

   router_id keepalvied_2

}

vrrp_instance VI_1 {

    state BACKUP

    interface eth0

    virtual_router_id 55

    priority 100

    advert_int 1

    authentication {

        auth_type PASS

        auth_pass 1111

    }

    virtual_ipaddress {

        10.89.3.168/24

    }

}

virtual_server 10.89.3.168 80 {

    delay_loop 6

    lb_algo wrr

    lb_kind DR

    nat_mask 255.255.255.0

    persistence_timeout 300

    protocol TCP

#ipvsadm -A -t 10.89.3.168 -s wrr -p 20

    real_server 10.89.3.100 80 {

        weight 1

        TCP_CHECK {

        connect_timeout 8

        nb_get_retry 3

        delay_before_retry 3

        connect_port 80

        }

  }

    real_server 10.89.3.101 80 {

        weight 1

        TCP_CHECK {

        connect_timeout 8

        nb_get_retry 3

        delay_before_retry 3

        connect_port 80

        }

  }

}

2.测试keepalived vip 是否漂移

#nginxproxy1

[root@nginxproxy1 keepalived]# ip add |grep 10.89.3

    inet 10.89.3.102/24 brd 10.89.3.255 scope global eth0

    inet 10.89.3.168/24 scope global secondary eth0

#nginxproxy2

[root@nginxproxy2 keepalived]# ip add |grep 10.89.3

    inet 10.89.3.103/24 brd 10.89.3.255 scope global eth0

#nginxproxy1 上停止keepalived

[root@nginxproxy1 keepalived]# /etc/init.d/keepalived stop

Stopping keepalived:                                       [  OK  ]

[root@nginxproxy1 keepalived]#  ip add |grep 10.89.3 

    inet 10.89.3.102/24 brd 10.89.3.255 scope global eth0       

#查看vip是否漂移了

[root@nginxproxy2 keepalived]# ip add |grep 10.89.3

    inet 10.89.3.103/24 brd 10.89.3.255 scope global eth0

    inet 10.89.3.168/24 scope global secondary eth0

#结论：keepalived配置采购，可以实现高可用。

3.配置2台 nginxproxy，实现负责均衡。

cd /application/nginx/conf

mkdir extra

[root@nginxproxy1 extra]# vi upstream01.conf 

upstream www_real_servers {

    server 10.89.3.100:80 weight=5;

    server 10.89.3.101:80 weight=5;

}

server {

    listen    80;

    server_name www.kjcat.org;

    location / {

    proxy_pass http://www_real_servers;

    }

}

#在nginxproxy1配置文件中包含extra

vi nginx.conf

worker_processes  1;

events {

    worker_connections  1024;

}

http {

    include       mime.types;

    default_type  application/octet-stream;

    sendfile        on;

    keepalive_timeout  65;

    include extra/upstream01.conf;

}

~

--------------------------------------

[root@nginxproxy2 extra]# vi upstream02.conf 

upstream www_real_servers {

    server 10.89.3.100:80 weight=5;

    server 10.89.3.101:80 weight=5;

}

server {

    listen    80;

    server_name www.kjcat.org;

    location / {

    proxy_pass http://www_real_servers;

    }

}

#在nginxproxy2配置文件中包含extra

vi nginx.conf

worker_processes  1;

events {

    worker_connections  1024;

}

http {

    include       mime.types;

    default_type  application/octet-stream;

    sendfile        on;

    keepalive_timeout  65;

    include extra/upstream02.conf;

}

#两台机器重新启动nginx

/application/nginx/sbin/nginx -s reload

4.验证测试

#在另外一台服务器上配置解析

[root@NfsServer ~]# vi /etc/hosts

#增加

10.89.3.168 www.kjcat.org

[root@NfsServer ~]# curl 10.89.3.168

this is nginx Proxy for LAMP........

[root@NfsServer ~]# curl 10.89.3.168

This is nginx proxy for LNMP.

[root@NfsServer ~]# curl 10.89.3.168

this is nginx Proxy for LAMP........

[root@NfsServer ~]# curl 10.89.3.168

This is nginx proxy for LNMP.

[root@NfsServer ~]# curl www.kjcat.org

this is nginx Proxy for LAMP........

[root@NfsServer ~]# curl www.kjcat.org

This is nginx proxy for LNMP.

[root@NfsServer ~]# curl www.kjcat.org

this is nginx Proxy for LAMP........

[root@NfsServer ~]# curl www.kjcat.org

This is nginx proxy for LNMP.

#在浏览器中输入IP也可以实现（如果有DNS就可以实现域名 www.kjcat.com访问）

http://10.89.3.168

This is nginx proxy for LNMP.

#刷新后

this is nginx Proxy for LAMP........

本文出自 “知识改变命运” 博客，请务必保留此出处http://ahtornado.blog.51cto.com/4826737/1873888

实战安装 nginx+keepalvied 实现负载均衡和高可用

标签：nginx负责均衡 upstream keepalived高可用

原文地址：http://ahtornado.blog.51cto.com/4826737/1873888