centos7下keepalived+nginx配置
阿新 • • 發佈:2018-05-26
centos7下keepalived+n一、系統架構:
角色 內網ip 外網ip keepalived+nginx 192.168.8.81 192.168.8.201 keepalived+nginx 192.168.8.82 192.168.8.201 web1 192.168.8.83 - web2 192.168.8.84 -
二、nginx配置(兩臺nginx配置一模一樣):
- 安裝:
yum -y install nginx
- 配置:
vim /etc/nginx/nginx.confuser nginx; worker_processes auto; error_log /var/log/nginx/error.log; pid /run/nginx.pid; include /usr/share/nginx/modules/*.conf; events { worker_connections 1024; } http { 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 /var/log/nginx/access.log main; sendfile on; tcp_nopush on; tcp_nodelay on; keepalive_timeout 65; types_hash_max_size 2048; include /etc/nginx/mime.types; default_type application/octet-stream; include /etc/nginx/conf.d/*.conf; upstream myProxy { server 192.168.8.83:80; server 192.168.8.84:80; } server { listen 80 default_server; listen [::]:80 default_server; server_name _; root /usr/share/nginx/html; include /etc/nginx/default.d/*.conf; location / { proxy_pass http://myProxy; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; } error_page 404 /404.html; location = /40x.html { } error_page 500 502 503 504 /50x.html; location = /50x.html { } } }
- 啟動:
systemctl start nginx
三、keepalived配置:
I、主服務器配置(192.168.8.81):
- 安裝:
yum -y install keepalived
- 配置:
vim /etc/keepalived/keepalived.conf! Configuration File for keepalived global_defs { } vrrp_script chk_nginx { script "/etc/keepalived/check.sh" interval 1 weight -15 } vrrp_instance VI_1 { state MASTER interface eth0 virtual_router_id 51 priority 100 advert_int 1 authentication { auth_type PASS auth_pass 123456 } virtual_ipaddress { 192.168.8.201 } track_script { chk_nginx } notify_master "/etc/keepalived/notify.sh master" notify_backup "/etc/keepalived/notify.sh backup" notify_fault "/etc/keepalived/notify.sh fault" }
- 添加服務檢查腳本(check.sh):
vim /etc/keepalived/check.sh#!/bin/bash # 心跳檢測:如果服務還在運行返回0,否則返回1 if [ "`ps -aux | grep nginx | wc -l`" == "0" ] ; then exit 1 else exit 0 fi
- 通知腳本(notify.sh):
vim /etc/keepalived/notify.sh#!/bin/bash # 通知腳本:具體操作 if [ "$1" == "master" ] ; then echo "`date +%F` `date +%T`:切換到主機模式" >> /var/log/keepalived/keepalived.log elif [ "$1" == "backup" ] ; then /usr/bin/systemctl start nginx echo "`date +%F` `date +%T`:切換到備機模式" >> /var/log/keepalived/keepalived.log else /usr/bin/systemctl start nginx echo "`date +%F` `date +%T`:宕機" >> /var/log/keepalived/keepalived.log fi
- 給腳本添加可執行權限:
chmod +x /etc/keepalived/check.sh chmod +x /etc/keepalived/notify.sh
- 創建日誌目錄:
mkdir /var/log/keepalived
- 啟動:
systemctl start keepalived
II、備服務器配置(192.168.8.82):
- 安裝:
yum -y install keepalived
- 配置:
vim /etc/keepalived/keepalived.conf! Configuration File for keepalived global_defs { } vrrp_script chk_nginx { script "killall -0 nginx" interval 1 weight -15 } vrrp_instance VI_1 { state BACKUP interface eth0 virtual_router_id 51 priority 99 advert_int 1 authentication { auth_type PASS auth_pass 123456 } virtual_ipaddress { 192.168.8.201 } track_script { chk_nginx } notify_master "/etc/keepalived/notify.sh master" notify_backup "/etc/keepalived/notify.sh backup" notify_fault "/etc/keepalived/notify.sh fault" }
- 添加服務檢查腳本(check.sh):
vim /etc/keepalived/check.sh#!/bin/bash # 心跳檢測:如果服務還在運行返回0,否則返回1 if [ "`ps -aux | grep nginx | wc -l`" == "0" ] ; then exit 1 else exit 0 fi
- 通知腳本(notify.sh):
vim /etc/keepalived/notify.sh#!/bin/bash # 通知腳本:具體操作 if [ "$1" == "master" ] ; then echo "`date +%F` `date +%T`:切換到主機模式" >> /var/log/keepalived/keepalived.log elif [ "$1" == "backup" ] ; then /usr/bin/systemctl start nginx echo "`date +%F` `date +%T`:切換到備機模式" >> /var/log/keepalived/keepalived.log else /usr/bin/systemctl start nginx echo "`date +%F` `date +%T`:宕機" >> /var/log/keepalived/keepalived.log fi
- 給腳本添加可執行權限:
chmod +x /etc/keepalived/check.sh chmod +x /etc/keepalived/notify.sh
- 創建日誌目錄:
mkdir /var/log/keepalived
- 啟動:
systemctl start keepalived
三、測試:
I、測試負載均衡:
II、測試心跳檢測(主服務器:192.168.8.81):
- 停止nginx服務:
systemctl stop nginx
- 查看日誌:
tail /var/log/keepalived/keepalived.log
centos7下keepalived+nginx配置