Nginx配合keepalived实现双主负载均衡

# yum –y install gccgcc-c++ pcre-devel openssl openssl-devel wget

# ./configure \   --prefix=/usr/local/nginx \   --sbin-path=/usr/local/nginx/sbin/nginx \   --conf-path=/etc/nginx/nginx.conf \   --error-log-path=/var/log/nginx/error.log \   --http-log-path=/var/log/nginx/access.log \   --pid-path=/var/run/nginx/nginx.pid \   --lock-path=/var/lock/nginx.lock \   --user=nginx \   --group=nginx \   --with-http_ssl_module \   --with-pcre  # make && make install

#!/bin/sh  #  # nginx - this script starts and stopsthe nginx daemon  #  # chkconfig:   - 85 15   # description:  Nginx is an HTTP(S) server, HTTP(S) reverse \  #               proxy and IMAP/POP3 proxy server  # processname: nginx  # config:      /etc/nginx/nginx.conf  # config:      /etc/sysconfig/nginx  # pidfile:     /var/run/nginx.pid  # Source function library.  . /etc/rc.d/init.d/functions  # Source networking configuration.  . /etc/sysconfig/network  # Check that networking is up.  [ "$NETWORKING" = "no"] && exit 0  nginx="/usr/local/nginx/sbin/nginx" prog=$(basename $nginx)  NGINX_CONF_FILE="/etc/nginx/nginx.conf" [ -f /etc/sysconfig/nginx ] && ./etc/sysconfig/nginx  lockfile=/var/lock/subsys/nginx  make_dirs() {    # make required directories    user=`nginx -V 2>&1 | grep "configure arguments:" | sed's/[^*]*--user=\([^ ]*\).*/\1/g' -`    options=`$nginx -V 2>&1 | grep 'configure arguments:'`    for opt in $options; do        if [ `echo $opt | grep '.*-temp-path'` ]; then             value=`echo $opt | cut -d"=" -f 2`             if [ ! -d "$value" ]; then                 # echo "creating"$value                 mkdir -p $value && chown-R $user $value             fi        fi    done  }  start() {     [ -x $nginx ] || exit 5     [ -f $NGINX_CONF_FILE ] || exit 6     make_dirs     echo -n $"Starting $prog: "     daemon $nginx -c $NGINX_CONF_FILE     retval=$?     echo     [ $retval -eq 0 ] && touch $lockfile     return $retval  }  stop() {     echo -n $"Stopping $prog: "     killproc $prog -QUIT     retval=$?     echo     [ $retval -eq 0 ] && rm -f $lockfile     return $retval  }  restart() {     configtest || return $?     stop     sleep 1     start  }  reload() {     configtest || return $?     echo -n $"Reloading $prog: "     killproc $nginx -HUP     RETVAL=$?     echo  }  force_reload() {     restart  }  configtest() {   $nginx -t -c $NGINX_CONF_FILE  }  rh_status() {     status $prog  }  rh_status_q() {     rh_status >/dev/null 2>&1  }  case "$1" in     start)         rh_status_q && exit 0         $1         ;;     stop)         rh_status_q || exit 0         $1         ;;     restart|configtest)         $1         ;;     reload)         rh_status_q || exit 7         $1         ;;     force-reload)         force_reload          ;;     status)         rh_status         ;;     condrestart|try-restart)         rh_status_q || exit 0              ;;     *)         echo $"Usage: $0{start|stop|status|restart|condrestart|try-restart|reload|force-reload|configtest}"         exit 2  esac

user nginx nginx;      worker_processes 1;      pid /var/run/nginx/nginx.pid;      worker_rlimit_nofile 51200;      events      {      use epoll;      worker_connections 51200;      }      http{      include       mime.types;      default_type application/octet-stream;      server_names_hash_bucket_size 128;      client_header_buffer_size 32k;      large_client_header_buffers 4 32k;      client_max_body_size 8m;      sendfile on;      tcp_nopush     on;      keepalive_timeout 60;      tcp_nodelay on;      fastcgi_connect_timeout 300;      fastcgi_send_timeout 300;      fastcgi_read_timeout 300;      fastcgi_buffer_size 64k;      fastcgi_buffers 4 64k;      fastcgi_busy_buffers_size 128k;      fastcgi_temp_file_write_size 128k;      gzip on;      gzip_min_length 1k;      gzip_buffers     4 16k;      gzip_http_version 1.0;      gzip_comp_level 2;      gzip_types       text/plain application/x-javascript text/css application/xml;      gzip_vary on;      upstream backend      {      ip_hash;      server 192.168.1.201:80;      server 192.168.1.202:80;      }      log_format access '$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 access;      server {      listen 80;      server_name www.test.com;      location / {      root /var/www/html ;      index index.php index.htm index.html;      proxy_redirect off;      proxy_set_header Host $host;      proxy_set_header X-Real-IP $remote_addr;      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;      proxy_pass http://backend;      }      location /nginx {      access_log off;      auth_basic "NginxStatus";      }      }  }

# wgethttp://www.keepalived.org/software/keepalived-1.2.16.tar.gz    # yum -y install libnl-devel  # ./configure --prefix=/usr/local/keepalived    # make && make install    # cp /usr/local/keepalived/sbin/keepalived /usr/sbin/   # cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/   # cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/   # mkdir /etc/keepalived    # cd /etc/keepalived/  # vim keepalived.conf

! Configuration File for keepalived         global_defs {       notification_email {             ganen2008@126.com #接收警报的email地址,可以添加多个     }       notification_email_from ganen201405@126.com #发件人地址     smtp_connect_timeout 3  #超时时间     smtp_server 127.0.0.1  #发送邮件的服务器     router_id LVS_DEVEL  #load balancer的标识ID,用于email警报  }    vrrp_instance VI_1 {        state MASTER      interface eth0      virtual_router_id 51       priority 100    # 权值要比 back 高      advert_int 1      authentication {            auth_type PASS            auth_pass 123456      }        virtual_ipaddress {            192.168.1.149 #vip的地址    }  }    vrrp_instance VI_2 {        state BACKUP      interface eth0        virtual_router_id 52       priority 90      advert_int 1       authentication {            auth_type PASS            auth_pass 123456       }        virtual_ipaddress {            192.168.1.150      }   }

! Configuration File for keepalived  global_defs {     notification_email {           ganen2008@126.com     }     notification_email_from ganen201405@126.com     smtp_connect_timeout 3     smtp_server 127.0.0.1     router_id LVS_DEVEL  }  vrrp_instance VI_1 {      state BACKUP      interface eth1      virtual_router_id 51      priority 90      advert_int 1      authentication {          auth_type PASS          auth_pass 123456      }      virtual_ipaddress {          192.168.1.149    }  }  vrrp_instance VI_2 {       state MASTER      interface eth1       virtual_router_id 52      priority 100      advert_int 1      authentication {          auth_type PASS          auth_pass 123456      }      virtual_ipaddress {          192.168.1.150      }  }

#!/bin/bash  while  :  do  nginxpid=`ps -C nginx --no-header | wc -l`   if [ $nginxpid -eq 0 ];then    /usr/local/nginx/sbin/nginx    sleep 5  nginxpid=`ps -C nginx --no-header | wc -l`    echo $nginxpid      if [ $nginxpid -eq 0 ];then   /etc/init.d/keepalived stop     fi   fi   sleep 5  done

# chmod +x /home/nginx_chk.sh
后台执行该脚本
# nohup sh /home/nginx_chk.sh &

# yum -y install yum-priorities  # rpm -Uvh http://mirrors.yun-idc.com/epel/6/x86_64/epel-release-6-8.noarch.rpm   # rpm -Uvh http://rpms.famillecollet.com/enterprise/remi-release-6.rpm   # yum -y install nginx  # /etc/init.d/nginx start