nginx编译安装+keepalived双主

nginx常用的模块

upstream 
proxy
stub_status

ssl

rewrite 

http://nginx.org/en/docs/http/ngx_http_upstream_module.html#upstream

在两台主机(192.168.0.6,192.168.0.12)上分别安装nginx+keepalived

1.安装依赖pcre(192.168.0.6)

wget  https://jaist.dl.sourceforge.net/project/pcre/pcre/8.42/pcre-8.42.tar.gz  #下载源码

tar xf pcre-8.42.tar.gz   

cd pcre-8.42  

./configure --prefix=/usr/local/pcre       

make && make install

2.安装nginx

 wget http://nginx.org/download/nginx-1.14.0.tar.gz

 tar xf nginx-1.14.0.tar.gz

cd nginx-1.14.0/

./configure --prefix=/usr/local/nginx--with-http_stub_status_module --with-http_ssl_module --with-pcre=../pcre-8.42--with-stream #编译

make && make install

/usr/local/nginx/sbin/nginx #启动

配置文件

cat /usr/local/nginx/conf/nginx.conf   192.168.0.6

#user  nginx;
worker_processes  2;
 
 
events {
    worker_connections  1024;
}
 
 
http {
    include       mime.types;
    default_type  application/octet-stream;
server_tokens off; #关闭版本显示
    client_max_body_size 100m;
    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';
 
    access_log  logs/access.log  main;
 
    sendfile       on;
    tcp_nopush     on;
 
    keepalive_timeout  65; 
    gzip  on;
    gzip_comp_level 7;
    gzip_min_length 1024;
    gzip_buffers 4 8k;
    gzip_types text/plain application/javascript text/css ;
    output_buffers 1 32k;
    postpone_output 1460;
upstream lp {
#server 192.168.0.6:8080;
server 192.168.0.12:8080;
}
 
    limit_req_zone $binary_remote_addr zone=allips:10m rate=100r/m;


include server/*.conf;

}

[root@4haocentos conf]# cat nginx.conf 192.168.0.12
#user  nginx;
worker_processes  2;
 
 
events {
    worker_connections  1024;
}
 
 
http {
    include       mime.types;
    default_type  application/octet-stream;
server_tokens off; #关闭版本显示
    client_max_body_size 100m;
    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';
 
    access_log  logs/access.log  main;
 
    sendfile       on;
    tcp_nopush     on;
 
    keepalive_timeout  65; 
    gzip  on;
    gzip_comp_level 7;
    gzip_min_length 1024;
    gzip_buffers 4 8k;
    gzip_types text/plain application/javascript text/css ;
    output_buffers 1 32k;
    postpone_output 1460;
upstream lp{
        server 192.168.0.6:8080;
        server 192.168.0.12:8080;
    }
 
    limit_req_zone $binary_remote_addr zone=allips:10m rate=100r/m;


include server/*.conf;

}

[root@4haocentos conf]# cat server/bgy.conf 
server {
    listen       80;
    server_name  test.apicloud.com;
    charset utf8;
client_header_buffer_size 128k;
large_client_header_buffers 4 128k;
    location / {
        proxy_pass http://lp/;
        proxy_redirect  off;
        proxy_set_header Host $http_host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header Cookie $http_cookie;
        chunked_transfer_encoding  off;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
   }
}

安装keepalived

yum install -y keepalived

配置文件192.168.0.6

cat /etc/keepalived/keepalived.conf
!Configuration File for keepalived
global_defs {
   router_id LVS_01
}


vrrp_script chk_http_port {
    script "/etc/keepalived/chk_nginx.sh"
    interval 2
    weight 2
}


vrrp_instance VI_1 {
    state MASTER            
    interface em1
    virtual_router_id 51          
    priority 200
    advert_int 1
    mcast_src_ip 192.168.0.06
    authentication {
        auth_type PASS
        auth_pass 1111
    }
      track_script {
        chk_http_port
    }
    virtual_ipaddress {
     192.168.0.3
    }
}
vrrp_instance VI_2 {
    state BACKUP
    interface em1
    virtual_router_id 52
    priority 150     
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    track_script {
        chk_http_port
    }
    virtual_ipaddress {
        192.168.0.4
    }

}

配置文件192.168.0.12

cat /etc/keepalived/keepalived.conf
!Configuration File for keepalived
global_defs {
   router_id LVS_01
}


vrrp_script chk_http_port {
    script "/etc/keepalived/chk_nginx.sh"
    interval 2
    weight 2
}


vrrp_instance VI_1 {
    state BACKUP           
    interface em1
    virtual_router_id 51          
    priority 150
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
      track_script {
        chk_http_port
    }
    virtual_ipaddress {
     192.168.0.3
    }
}
vrrp_instance VI_2 {
    state MASTER
    interface em1
    virtual_router_id 52
    priority 200     
    mcast_src_ip 192.168.0.12
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    track_script {
        chk_http_port
    }
    virtual_ipaddress {
        192.168.0.4
    }
}

查看nginx状态脚本

cat /etc/keepalived/chk_nginx.sh 
#!/bin/bash
status=$(ps -C nginx --no-heading|wc -l)
if [ "${status}" = "0" ]; then
        /usr/local/nginx/sbin/nginx
        status2=$(ps -C nginx --no-heading|wc -l)
        if [ "${status2}" = "0"  ]; then
                /etc/init.d/keepalived stop
        fi
fi