keepalive +nginx (主从)

环境:cenos7    keepalive1.3.8   nginx1.12.2

vip 172.18.203.101        master机器    nginx1:外网172.18.203.172  内网 172.18.1.172              slave机器   nginx2:外网172.18.203.173  内网 172.18.1.173

keepalive  master 配置文件

[root@keepalive ~]# cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived     #全局定义
  
global_defs {
notification_email {
xiaofeng@sunspeedy.com
}
  
notification_email_from xiaofeng@sunspeedy.com
smtp_server  smtp.exmail.qq.com
smtp_connect_timeout 30
router_id master-node
}
  
vrrp_script chk_http_port {
    script "/opt/chk_nginx.sh"
    interval 2
    weight -5
    fall 2
    rise 1
}
  
vrrp_instance VI_1 {
    state MASTER
    interface ens192
    mcast_src_ip 172.18.203.172

unicast_peer {
172.18.203.173 ##(对端IP地址)此地址一定不能忘记,vrrp need use
}


virtual_router_id 51 priority 101 advert_int 1 authentication { auth_type PASS #设置vrrp验证类型,主要有PASS和AH两种 auth_pass 1111 } virtual_ipaddress { #VRRP HA 虚拟地址 如果有多个VIP,继续换行填写 172.18.203.101 } notify_master "/etc/keepalived/notify.sh master" notify_backup "/etc/keepalived/notify.sh backup" notify_fault "/etc/keepalived/notify.sh fault" track_script { chk_http_port } }

nginx配置

[root@keepalive ~]# cat /usr/local/nginx/conf/nginx.conf
user  nginx;
worker_processes  2;
 
#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;
 
#pid        logs/nginx.pid;
 
 
events {
    worker_connections  65535;
}
 
 
http {
    include       mime.types;
    default_type  application/octet-stream;
    charset utf-8;
       
    ######
    ## set access log format
    ######
    log_format  main  '$http_x_forwarded_for $remote_addr $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_cookie" $host $request_time';
 
    #######
    ## http setting
    #######
    sendfile       on;
    tcp_nopush     on;
    tcp_nodelay    on;
    keepalive_timeout  65;
    proxy_cache_path /var/www/cache levels=1:2 keys_zone=mycache:20m max_size=2048m inactive=60m;
    proxy_temp_path /var/www/cache/tmp;
 
    fastcgi_connect_timeout 3000;
    fastcgi_send_timeout 3000;
    fastcgi_read_timeout 3000;
    fastcgi_buffer_size 256k;
    fastcgi_buffers 8 256k;
    fastcgi_busy_buffers_size 256k;
    fastcgi_temp_file_write_size 256k;
    fastcgi_intercept_errors on;
 
    #
    client_header_timeout 600s;
    client_body_timeout 600s;
   # client_max_body_size 50m;
    client_max_body_size 100m;               #允许客户端请求的最大单个文件字节数
    client_body_buffer_size 256k;            #缓冲区代理缓冲请求的最大字节数,可以理解为先保存到本地再传给用户
 
    gzip  on;
    gzip_min_length  1k;
    gzip_buffers     4 16k;
    gzip_http_version 1.1;
    gzip_comp_level 9;
    gzip_types       text/plain application/x-javascript text/css application/xml text/javascript application/x-httpd-php;
    gzip_vary on;
 
    ## includes vhosts
    include vhosts/*.conf;
}
[root@keepalive ~]# cat /usr/local/nginx/conf/vhosts/ntt52101.conf
upstream LB-WWW {
      ip_hash;
      server 172.18.1.155:52101 max_fails=3 fail_timeout=30s;     #max_fails = 3 为允许失败的次数,默认值为1
      server 172.18.1.156:52101 max_fails=3 fail_timeout=30s;     #fail_timeout = 30s 当max_fails次失败后,暂停将请求分发到该后端服务器的时间
    }
    
server {
      listen      52101;
######如果后端有多组web,需要将其域名解析到vip
      server_name 172.18.203.101;    
      access_log  /usr/local/nginx/logs/nttinterface_access.log main;
      error_log  /usr/local/nginx/logs/nttinterface_error.log;
    
      location / {
         proxy_pass http://LB-WWW;
         proxy_redirect off ;
         proxy_set_header Host $host;
         proxy_set_header X-Real-IP $remote_addr;
         proxy_set_header REMOTE-HOST $remote_addr;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
         proxy_connect_timeout 300;             #跟后端服务器连接超时时间,发起握手等候响应时间
         proxy_send_timeout 300;                #后端服务器回传时间,就是在规定时间内后端服务器必须传完所有数据
         proxy_read_timeout 600;                #连接成功后等待后端服务器的响应时间,已经进入后端的排队之中等候处理
         proxy_buffer_size 256k;                #代理请求缓冲区,会保存用户的头信息以供nginx进行处理
         proxy_buffers 4 256k;                  #同上,告诉nginx保存单个用几个buffer最大用多少空间
         proxy_busy_buffers_size 256k;          #如果系统很忙时候可以申请最大的proxy_buffers
         proxy_temp_file_write_size 256k;       #proxy缓存临时文件的大小
         proxy_next_upstream error timeout invalid_header http_500 http_503 http_404;
         proxy_max_temp_file_size 128m;
         proxy_cache mycache;                                
         proxy_cache_valid 200 302 60m;                      
         proxy_cache_valid 404 1m;
       }    
}

slave端

[root@keepalive src]# cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived    
  
global_defs {
notification_email {                
xiaofeng@sunspeedy.com
}
  
notification_email_from xiaofeng@sunspeedy.com  
smtp_server smtp.exmail.qq.com                    
smtp_connect_timeout 30                 
router_id slave-node                    
}
  
vrrp_script chk_http_port {         
    script "/opt/chk_nginx.sh"   
    interval 2                      
    weight -5                       
    fall 2                   
    rise 1                  
}
  
vrrp_instance VI_1 {            
    state BACKUP           
    interface ens192            
    mcast_src_ip 172.18.203.173  

unicast_peer {
172.18.203.172 ##(对端IP地址)此地址一定不能忘记,vrrp need use
}


    virtual_router_id 51        
    priority 99               
    advert_int 1               
    authentication {            
        auth_type PASS         
        auth_pass 1111          
    }
    virtual_ipaddress {        
        172.18.203.101
    }

    notify_master "/etc/keepalived/notify.sh master"  
    notify_backup "/etc/keepalived/notify.sh backup"  
    notify_fault "/etc/keepalived/notify.sh fault"

track_script {                     
   chk_http_port                 
}
 
}

ngixn检查

[root@keepalive src]# cat /opt/
chk_nginx.sh  frp/          
[root@keepalive src]# cat /opt/chk_nginx.sh 
#!/bin/bash
counter=$(ps -C nginx --no-heading|wc -l)
if [ "${counter}" = "0" ]; then
    /usr/local/nginx/sbin/nginx
    sleep 2
    counter=$(ps -C nginx --no-heading|wc -l)
    if [ "${counter}" = "0" ]; then
        /etc/init.d/keepalived stop
    fi
fi

发送邮件

[root@keepalive src]# cat /etc/keepalived/notify.sh 

#!/bin/bash
# Author: MageEdu <linuxedu@foxmail.com>
# description: An example of notify script
# 

vip=172.18.203.101
contact='xiaofeng@sunspeedy.com'

notify() {
    mailsubject="`hostname` to be $1: $vip floating"
    mailbody="`date '+%F %H:%M:%S'`: vrrp transition, `hostname` changed to be $1"
    echo $mailbody | mail -s "$mailsubject" $contact
}

 防火墙配置

 1008  iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
 1009   iptables -A INPUT -p icmp -j ACCEPT
 1010  iptables -A INPUT -i lo -j ACCEPT
 1011   iptables -A INPUT -s 172.18.203.0/24 -d 224.0.0.18 -j ACCEPT
 1012  iptables -A INPUT -s 172.18.1.0/24 -d 224.0.0.18 -j ACCEPT
 1013  iptables -A INPUT -s 172.18.203.0/24 -p vrrp -j ACCEPT
 1014  iptables -A INPUT -s 172.18.1.0/24 -p vrrp -j ACCEPT
 1015  iptables -A INPUT -p tcp  -m multiport --dport 80,22,52101,8123 -j ACCEPT
 1016  iptables -A INPUT -j REJECT --reject-with icmp-host-prohibited
 1017  iptables -A FORWARD -j REJECT --reject-with icmp-host-prohibited
 1018  iptables-save
 1019  history

 防火墙配置

  iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
 1084  iptables -A INPUT -p icmp -j ACCEPT
 1085  iptables -A INPUT -i lo -j ACCEPT
 1086  iptables -A INPUT -d 172.18.203.101 -j ACCEPT
 1087  iptables -A INPUT -s 172.18.203.0/24 -d 224.0.0.18 -j ACCEPT
 1088  iptables -A INPUT -s 172.18.1.0/24 -d 224.0.0.18 -j ACCEPT
 1089  iptables -A INPUT -s 172.18.203.0/24 -p vrrp -j ACCEPT
 1090  iptables -A INPUT -s 172.18.1.0/24 -p vrrp -j ACCEPT
 1091  iptables -A INPUT -p tcp  -m multiport --dport 80,22,52101,8123 -j ACCEPT
 1092  iptables -A INPUT -j REJECT --reject-with icmp-host-prohibited
 1093  iptables -A FORWARD -j REJECT --reject-with icmp-host-prohibited
 1094  iptables -L -n
 1095  iptables-save

 

posted @ 2018-03-08 15:39  jianxiaofeng  阅读(...)  评论(...编辑  收藏