nginx+keepalived配置
时间:2021-08-11
本文章向大家介绍nginx+keepalived配置，主要包括nginx+keepalived配置使用实例、应用技巧、基本知识点总结和需要注意事项，具有一定的参考价值，需要的朋友可以参考一下。
nginx+keepalived配置
转载ly368432015-06-01 18:02:04©著作权
文章标签nginx+keepalived配置文章分类linux阅读数1798
一、环境
系统:CentOS 6.4x64位最小化安装
nginx-m:192.168.3.23
nginx-s:192.168.3.24
vip: 192.168.3.29
二、安装nginx
在nginx-m和nginx-s安装nginx，这里使用脚本安装，脚本内容如下
#!/bin/bash
cur_dir=$(pwd)
NGINXVERSION='nginx-1.6.0'
export LANG=zh_CN.UTF-8
#Source function library.
. /etc/init.d/functions
create_nginx_conf(){
cat >>/usr/local/nginx/conf/nginx.conf<<EOF
user www www;
worker_processes auto;
error_log /usr/local/nginx/logs/nginx_error.log crit;
pid /usr/local/nginx/logs/nginx.pid;
#Specifies the value for maximum file descriptors that can be opened by this process.
worker_rlimit_nofile 51200;
events
{
use epoll;
worker_connections 51200;
multi_accept on;
}
http
{
include mime.types;
default_type application/octet-stream;
server_names_hash_bucket_size 128;
client_header_buffer_size 32k;
large_client_header_buffers 4 32k;
client_max_body_size 50m;
sendfile on;
tcp_nopush on;
keepalive_timeout 60;
tcp_nodelay on;
fastcgi_connect_timeout 300;
fastcgi_send_timeout 300;
fastcgi_read_timeout 300;
fastcgi_buffer_size 64k;
fastcgi_buffers 4 64k;
fastcgi_busy_buffers_size 128k;
fastcgi_temp_file_write_size 256k;
gzip on;
gzip_min_length 1k;
gzip_buffers 4 16k;
gzip_http_version 1.0;
gzip_comp_level 2;
gzip_types text/plain application/x-javascript text/css application/xml;
gzip_vary on;
gzip_proxied expired no-cache no-store private auth;
gzip_disable "MSIE [1-6]\.";
#limit_conn_zone \$binary_remote_addr zone=perip:10m;
##If enable limit_conn_zone,add "limit_conn perip 10;" to server section.
server_tokens off;
#log format
log_format access '\$remote_addr - \$remote_user [\$time_local] "\$request" '
'\$status \$body_bytes_sent "\$http_referer" '
'"\$http_user_agent" \$http_x_forwarded_for';
server
{
listen 80 default;
#listen [::]:80 default ipv6only=on;
server_name www.myweb.com;
index index.html index.htm index.php;
root /var/www/default;
#error_page 404 /404.html;
location ~ [^/]\.php(/|$)
{
# comment try_files \$uri =404; to enable pathinfo
try_files \$uri =404;
fastcgi_pass unix:/tmp/php-cgi.sock;
fastcgi_index index.php;
include fastcgi.conf;
#include pathinfo.conf;
}
location /nginx_status {
stub_status on;
access_log off;
}
location ~ .*\.(gif|jpg|jpeg|png|bmp|swf)\$
{
expires 30d;
}
location ~ .*\.(js|css)?\$
{
expires 12h;
}
access_log /var/www/wwwlogs/access.log access;
}
include vhost/*.conf;
}
EOF
}
create_nginx_init(){
cat >>/etc/init.d/nginx<<EOF
#! /bin/sh
# chkconfig: 2345 55 25
# Description: Startup script for nginx webserver on Debian. Place in /etc/init.d and
# run 'update-rc.d -f nginx defaults', or use the appropriate command on your
# distro. For CentOS/Redhat run: 'chkconfig --add nginx'
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
NAME=nginx
NGINX_BIN=/usr/local/nginx/sbin/\$NAME
CONFIGFILE=/usr/local/nginx/conf/\$NAME.conf
PIDFILE=/usr/local/nginx/logs/\$NAME.pid
SCRIPTNAME=/etc/init.d/\$NAME
case "\$1" in
start)
echo -n "Starting \$NAME... "
if netstat -tnpl | grep -q nginx;then
echo "\$NAME (pid \`pidof \$NAME\`) already running."
exit 1
fi
\$NGINX_BIN -c \$CONFIGFILE
if [ "\$?" != 0 ] ; then
echo " failed"
exit 1
else
echo " done"
fi
;;
stop)
echo -n "Stoping \$NAME... "
if ! netstat -tnpl | grep -q nginx; then
echo "\$NAME is not running."
exit 1
fi
\$NGINX_BIN -s stop
if [ "\$?" != 0 ] ; then
echo " failed. Use force-quit"
exit 1
else
echo " done"
fi
;;
status)
if netstat -tnpl | grep -q nginx; then
PID=\`pidof nginx\`
echo "\$NAME (pid \$PID) is running..."
else
echo "\$NAME is stopped"
exit 0
fi
;;
force-quit)
echo -n "Terminating \$NAME... "
if ! netstat -tnpl | grep -q nginx; then
echo "\$NAME is not running."
exit 1
fi
kill \`pidof \$NAME\`
if [ "\$?" != 0 ] ; then
echo " failed"
exit 1
else
echo " done"
fi
;;
restart)
\$SCRIPTNAME stop
sleep 1
\$SCRIPTNAME start
;;
reload)
echo -n "Reload service \$NAME... "
if netstat -tnpl | grep -q nginx; then
\$NGINX_BIN -s reload
echo " done"
else
echo "\$NAME is not running, can't reload."
exit 1
fi
;;
configtest)
echo -n "Test \$NAME configure files... "
\$NGINX_BIN -t
;;
*)
echo "Usage: \$SCRIPTNAME {start|stop|force-quit|restart|reload|status|configtest}"
exit 1
;;
esac
EOF
}
#install_nginx
install_nginx(){
cd $cur_dir
yum install make gcc gcc-c++ openssl-devel -y
#add user www for nginx
id www &>/dev/null
if [ $? -ne 0 ];then
groupadd www
useradd -s /sbin/nologin -g www www
fi
wget http://sourceforge.net/projects/pcre/files/pcre/8.30/pcre-8.30.tar.gz/download
if [ $? -ne 0 ];then
echo "download pcre package is fail"
exit $?
fi
tar xf pcre-8.30.tar.gz
cd pcre-8.30
./configure
make && make install
if [ $? -eq 0 ];then
echo "install pcre is successful!!!"
else
echo "install pcre is fail!!!"
exit $?
fi
echo "/usr/local/lib/" >>/etc/ld.so.conf
ldconfig
#download nginx package
cd $cur_dir
wget http://mirrors.sohu.com/nginx/$NGINXVERSION.tar.gz
if [ $? -ne 0 ];then
echo "download nginx is fail!!!"
exit $?
fi
tar xf $NGINXVERSION.tar.gz
cd $NGINXVERSION
./configure --user=www --group=www --prefix=/usr/local/$NGINXVERSION --with-http_stub_status_module --with-http_ssl_module --with-http_gzip_static_module --with-ipv6
make && make install
if [ $? -ne 0 ];then
echo "install nginx fail!!!"
exit $?
fi
#links
ln -s /usr/local/$NGINXVERSION /usr/local/nginx
ln -s /usr/local/nginx/sbin/nginx /usr/bin/nginx
mv /usr/local/nginx/conf/nginx.conf /usr/local/nginx/conf/nginx.conf.bak
#create file nginx.conf
create_nginx_conf
mkdir -p /var/www/default
chmod +w /var/www/default
mkdir -p /var/www/wwwlogs
chmod 777 /var/www/wwwlogs
chown -R www:www /var/www/default
cp /usr/local/nginx/html/index.html /var/www/default/index.html
#create start scripts for nginx
create_nginx_init
chmod +x /etc/init.d/nginx
chkconfig --add nginx
chkconfig nginx on
/etc/init.d/nginx start
if [ $? -eq 0 ];then
action "start nginx" /bin/true
echo "+---------------------------------+"
echo "+------nginx install done--------+"
echo "+---------------------------------+"
fi
}
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在iptables中对80端口进行放行
[root@nginx-m ~]# iptables -I INPUT -p tcp --dport 80 -j ACCEPT
[root@nginx-m ~]# service iptables save
iptables: Saving firewall rules to /etc/sysconfig/iptables:[ OK ]
[root@nginx-m ~]# echo "nginx-m 23" >/var/www/default/index.html
[root@nginx-m ~]# curl http://192.168.3.23
nginx-m 23- 1.
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nginx-s的配置相同，只有主页内容不一样
[root@nginx-s ~]# echo "nginx-s 24" >/var/www/default/index.html
[root@nginx-s ~]# iptables -I INPUT -p tcp --dport 80 -j ACCEPT
[root@nginx-s ~]# service iptables save
iptables: Saving firewall rules to /etc/sysconfig/iptables:[ OK ]
[root@nginx-s ~]# curl http://192.168.3.24
nginx-s 24- 1.
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三、安装keepalived
2台的安装都一样，只有配置文件不一样，只里只给出nginx-m的安装过程
[root@nginx-m ~]# yum install openssl openssl-devel -y
[root@nginx-m ~]# wget http://www.keepalived.org/software/keepalived-1.2.13.tar.gz
[root@nginx-m ~]# tar xf keepalived-1.2.13.tar.gz
[root@nginx-m ~]# cd keepalived-1.2.13
[root@nginx-m keepalived-1.2.13]# ./configure
[root@nginx-m keepalived-1.2.13]# make && make install
#将keepalived配置成开机启动
[root@nginx-m keepalived-1.2.13]# cp /usr/local/etc/rc.d/init.d/keepalived /etc/init.d/
[root@nginx-m keepalived-1.2.13]# cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/
[root@nginx-m keepalived-1.2.13]# mkdir /etc/keepalived
[root@nginx-m keepalived-1.2.13]# ln -s /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/
[root@nginx-m keepalived-1.2.13]# ln -s /usr/local/sbin/keepalived /usr/sbin/
#备份keepalived.conf文件
[root@nginx-m keepalived-1.2.13]# cp /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak
#keepalived配置文件内容如下
! Configuration File for keepalived
global_defs {
notification_email {
lyao@weyee.com #配置管理员邮箱
}
notification_email_from root #配置发件人
smtp_server 127.0.0.1 #配置邮件服务器
smtp_connect_timeout 30
router_id nginx-m
}
vrrp_script check_nginx {
script "/etc/keepalived/check_nginx.sh" #定义nginx状态检查脚本
intervar 4
weight -5
fail 2
rise 1
}
vrrp_instance VI_1 {
state MASTER #配置模式
interface eth0
virtual_router_id 99
priority 101 #配置优先级
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.3.29 #配置虚拟IP地址
}
notify_master /etc/keepalived/notify_master.sh #这里指定的是切换成master状态时要执行的通知脚本
notify_backup /etc/keepalived/notify_backup.sh #这里指定的是切换成backup状态时要执行的通知脚本
notify_fault /etc/keepalived/notify_fault.sh #这里指定的是切换成fault状态时要执行的通知脚本
track_script {
check_nginx
}
}
#创建nginx状态检查脚本
[root@nginx-m keepalived-1.2.13]# cat /etc/keepalived/check_nginx.sh
#!/bin/bash
A=`ps -C nginx --no-header |wc -l`
if [ $A -eq 0 ];then
/usr/local/nginx/sbin/nginx
sleep 3
if [ `ps -C nginx --no-header |wc -l` -eq 0 ];then
killall keepalived
fi
fi
[root@nginx-m keepalived-1.2.13]# chmod +x /etc/keepalived/check_nginx.sh
#notify_master.sh脚本内容，当服务器改变为主时执行此脚本
[root@nginx-m keepalived-1.2.13]# cat /etc/keepalived/notify_master.sh
#!/bin/bash
Date=$(date +%F" "%T)
IP=$(ifconfig eth0 |grep "inet addr" |cut -d":" -f2 |awk '{print $1}')
Mail="lyao@weyee.com" #这里的邮箱地址根据自己的需要更改
echo "$Date `hostname`:$IP change to Master." |mail -s "Master-Backup Change Status" $Mail
[root@nginx-m keepalived-1.2.13]# chmod +x /etc/keepalived/notify_master.sh
#notify_backup.sh脚本内容，当服务器改变为备时执行此脚本
[root@nginx-m keepalived-1.2.13]# cat /etc/keepalived/notify_backup.sh
#!/bin/bash
Date=$(date +%F" "%T)
IP=$(ifconfig eth0 |grep "inet addr" |cut -d":" -f2 |awk '{print $1}')
Mail="lyao@weyee.com"
echo "$Date `hostname`:$IP change to Backup." |mail -s "Master-Backup Change Status" $Mail
[root@nginx-m keepalived-1.2.13]# chmod +x /etc/keepalived/notify_backup.sh
#notify_fault.sh脚本内容，当服务器改变为故障时执行此脚本
[root@nginx-m keepalived-1.2.13]# cat /etc/keepalived/notify_fault.sh
#!/bin/bash
Date=$(date +%F" "%T)
IP=$(ifconfig eth0 |grep "inet addr" |cut -d":" -f2 |awk '{print $1}')
Mail="lyao@weyee.com"
echo "$Date