标签：lnmp
环境需求：
hostname：web1 ip：192.168.1.241
hostname：ha1 ip：192.168.1.243
hostname：ha2 ip：192.168.1.242
keepalived vip：192.168.1.245
1.nginx+upstream安装（ha1和ha2配置一样）
[root@ha1 opt]# yum -y install gcc gcc-c++ openssl openssl-devel
[root@ha1 opt]# useradd nginx -s /sbin/nologin
[root@ha1 opt]# tar zxf pcre-8.34.tar.gz
[root@ha1 opt]# cd pcre-8.34
[root@ha1 pcre-8.34]# ./configure
[root@ha1 pcre-8.34]# make && make install
[root@ha1 opt]# tar zxf tengine-1.5.1.tar.gz
[root@ha1 opt]# cd tengine-1.5.1
[root@ha1 tengine-1.5.1]# ./configure --user=nginx --group=nginx --prefix=/usr/local/nginx --with-http_stub_status_module --with-http_ssl_module
[root@ha1 tengine-1.5.1]# make && make install
[root@ha1 ~]# mv /usr/local/nginx/conf/nginx.conf /usr/local/nginx/conf/nginx.conf.bak
[root@ha1 ~]# vi /usr/local/nginx/conf/nginx.conf（新建nginx配置文件）
添加一下配置
user nginx nginx;
worker_processes auto;
worker_rlimit_nofile 65535;
error_log /var/log/www/error.log;
#pid logs/nginx.pid;
events {
use epoll;
worker_connections 51200;
}
http {
include mime.types;
default_type application/octet-stream;
log_format main ‘$remote_addr - $remote_user [$time_local] "$request"‘
‘$status $body_bytes_sent "$http_referer" ‘
‘"$http_user_agent" "$http_x_forwarded_for"‘;
server_info off;
server_tag off;
server_name_in_redirect off;
access_log /var/log/www/access.log main;
client_max_body_size 20m;
client_header_buffer_size 16k;
large_client_header_buffers 4 16k;
sendfile on;
tcp_nopush on;
keepalive_timeout 65;
server_tokens on;
gzip on;
gzip_min_length 1k;
gzip_buffers 4 16k;
gzip_proxied any;
gzip_http_version 1.1;
gzip_comp_level 3;
gzip_types text/plain application/x-javascript text/css application/xml;
gzip_vary on;
upstream kim {
consistent_hash $request_uri;
server 192.168.1.241:80;
check interval=3000 rise=2 fall=5 timeout=1000 type=http;
check_http_send "GET / HTTP/1.0\r\n\r\n";
check_http_expect_alive http_2xx http_3xx;
}
server {
listen 80;
server_name localhost;
location / {
proxy_next_upstream error timeout invalid_header http_500 http_503 http_404 http_502 http_504;
proxy_pass http://kim;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}
}
}
[root@ha1 conf]# vi /etc/init.d/nginxd（新建nginx启动文件）
添加以下配置
#! /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‘
### BEGIN INIT INFO
# Provides: nginx
# Required-Start: $all
# Required-Stop: $all
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: starts the nginx web server
# Description: starts nginx using start-stop-daemon
### END INIT INFO
PATH=/usr/local/nginx/sbin:/usr/local/nginx/bin:/sbin:/bin:/usr/sbin:/usr/bin
DESC="nginx daemon"
NAME=nginx
DAEMON=/usr/local/nginx/sbin/$NAME
CONFIGFILE=/usr/local/nginx//conf/$NAME.conf
PIDFILE=/usr/local/nginx//logs/$NAME.pid
SCRIPTNAME=/etc/init.d/$NAME
set -e
[ -x "$DAEMON" ] || exit 0
do_start() {
$DAEMON -c $CONFIGFILE || echo -n "nginx already running"
}
do_stop() {
kill -INT `cat $PIDFILE` || echo -n "nginx not running"
}
do_reload() {
kill -HUP `cat $PIDFILE` || echo -n "nginx can‘t reload"
}
case "$1" in
start)
echo -n "Starting $DESC: $NAME"
do_start
echo "."
;;
stop)
echo -n "Stopping $DESC: $NAME"
do_stop
echo "."
;;
reload|graceful)
echo -n "Reloading $DESC configuration..."
do_reload
echo "."
;;
restart)
echo -n "Restarting $DESC: $NAME"
do_stop
do_start
echo "."
;;
*)
echo "Usage: $SCRIPTNAME {start|stop|reload|restart}" >&2
exit 3
;;
esac
exit 0
[root@ha1 keepalived]# chmod o+x /etc/init.d/nginxd （赋予执行权限）
[root@ha1 keepalived]# /etc/init.d/nginxd start
2.测试nginx
（1）测试web1正常访问
（3）测试ha1负载web1
（3）测试ha2负载web1
3.安装keepalived（ha1与ha2一样配置）
[root@ha1 ~]# yum -y install keepalived （要保证ha1与ha2上的keepalived版本一致）
[root@ha1 ~]# mkdir /etc/keepalived/script （新建nginx检车脚本存放目录）
[root@ha1 ~]# vi /etc/keepalived/script/check_nginx.sh （新建nginx检测脚本）
添加以下内容
!/bin/sh
# check nginx server status
NGINX=/usr/local/nginx/sbin/nginx
PORT=80
nmap localhost -p $PORT | grep "$PORT/tcp open"
#echo $?
if [ $? -ne 0 ];then
$NGINX -s stop
sleep 3
nmap localhost -p $PORT | grep "$PORT/tcp open"
[ $? -ne 0 ] && /etc/init.d/keepalived stop
fi
[root@ha1 ~]# chmod o+x /etc/keepalived/script/check_nginx.sh （赋予执行权限）
（1）新建keepalived配置文件（在ha1上配置）
[root@ha1 ~]# mv /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak
[root@ha1 ~]# vi /etc/keepalived/keepalived.conf
添加以下配置
! Configuration File for keepalived
global_defs {
notification_email {
root@localhost
}
notification_email_from kim@163.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_script chk_http_port {
script "/etc/keepalived/script/check_nginx.sh"
interval 2
weight 2
}
vrrp_instance VI_1 {
state MASTER
interface eth1
virtual_router_id 56
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1234
}
track_script {
chk_http_port
}
virtual_ipaddress {
192.168.1.245
}
}
（2）新建keepalived配置文件（在ha2上配置）
[root@ha2 ~]# mv /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak
[root@ha2 ~]# vi /etc/keepalived/keepalived.conf
添加以下配置
! Configuration File for keepalived
global_defs {
notification_email {
root@localhost
}
notification_email_from kim@163.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_script chk_http_port {
script "/etc/keepalived/script/check_nginx.sh"
interval 2
weight 2
}
vrrp_instance VI_1 {
state BACKUP
interface eth1
virtual_router_id 56
priority 99
advert_int 1
authentication {
auth_type PASS
auth_pass 1234
}
track_script {
chk_http_port
}
virtual_ipaddress {
192.168.1.245
}
}
4.测试keepalived
以上可以看出虚拟ip在ha1上
以上可以看出，nginx断开后，虚拟ip漂移到ha2上
由上图可见，利用vip访问，负载正常
本文出自 “Linux艺术(Q群：1991706）” 博客，请务必保留此出处http://304076020.blog.51cto.com/7503470/1655982
标签：lnmp
原文地址：http://304076020.blog.51cto.com/7503470/1655982
