NginX+keepalived实现高可用
yum install zlib-devel libxml2-devel libjpeg-devel libjpeg-turbo-devel libiconv-devel freetype-devel libpng-devel gd-devel libcurl-devel libxslt-devel libxslt-devel
安装缺少组件后编辑成功。
执行 make && make install
编译安装成功：
默认编译安装目录 ：
编辑脚本：vim /etc/init.d/nginx
内容如下：
#!/bin/sh
#
# nginx - this script starts and stops the nginx daemin
#
# chkconfig: - 85 15
# description: Nginx is an HTTP(S) server, HTTP(S) reverse \
# proxy and IMAP/POP3 proxy server
# processname: nginx
# config: /usr/local/nginx/conf/nginx.conf
# pidfile: /usr/local/nginx/logs/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="/usr/local/nginx/conf/nginx.conf"
lockfile=/var/lock/subsys/nginx start() {
[ -x $nginx ] || exit 5
[ -f $NGINX_CONF_FILE ] || exit 6
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 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
保存退出添加执行权限
chmod +x /etc/init.d/nginx
启动脚本观察监听端口是否有80
编辑一个测试页：
vim /usr/local/nginx/html/index.html
保存退出测试能否访问
同样26.210也测试下
26.210 keepalived 配置文件：vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
jwenshan@hysec.com
jwenshan@gmail.com
}
notification_email_from jwenshan@163.com
smtp_server smtp.hysec.com smtp_connect_timeout 30 router_id nginx
}
vrrp_instance VI_1 { state MASTER interface eth0 virtual_router_id 51 priority 100 advert_int 1 authentication { auth_type PASS auth_pass 1111
}
virtual_ipaddress {
192.168.27.210
}
}
virtual_server 192.168.27.210 80 {
delay_loop 2 lb_algo rr lb_kind DR
persistence_timeout 60
protocol TCP
real_server 192.168.26.210 80 {
weight 1
notify_down /etc/keepalived/chk_nginx.sh
TCP_CHECK { connect_port 80 connect_timeout 3 nb_get_retry 2 delay_before_retry 1
}
}
}
chk_nginx.sh脚本：vim /etc/keepalived/chk_nginx.sh
#!/bin/bash
A=`ps -C nginx --no-header |wc -l`
if [ $A -eq 0 ];then
echo ‘nginx server is died‘
/etc/init.d/keepalived stop
fi
别忘记加执行权限：chmod +x /etc/keepalived/chk_nginx.sh
26.211 keepalived 配置文件：vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
jwenshan@hysec.com
jwenshan@gmail.com
}
notification_email_from jwenshan@163.com
smtp_server smtp.hysec.com smtp_connect_timeout 30 router_id nginx
}
vrrp_instance VI_1 { state BACKUP interface eth0 virtual_router_id 51 priority 99 advert_int 1 authentication { auth_type PASS auth_pass 1111
}
virtual_ipaddress {
192.168.27.210
}
}
virtual_server 192.168.27.210 80 {
delay_loop 2 lb_algo rr lb_kind DR
persistence_timeout 60
protocol TCP
real_server 192.168.26.211 80 {
weight 1
notify_down /etc/keepalived/chk_nginx.sh
TCP_CHECK { connect_port 80 connect_timeout 3 nb_get_retry 2 delay_before_retry 1
}
}
}
chk_nginx.sh脚本：vim /etc/keepalived/chk_nginx.sh
#!/bin/bash
A=`ps -C nginx --no-header |wc -l`
if [ $A -eq 0 ];then
echo ‘nginx server is died‘
/etc/init.d/keepalived stop
fi
本文出自 “在路上” 博客，请务必保留此出处http://jdonghong.blog.51cto.com/3473478/1883414
原文地址：http://jdonghong.blog.51cto.com/3473478/1883414
