nginx + keepalived 双机热备

sudo apt-get install nginx 

sudo find / -name nginx.conf
/etc/nginx/nginx.conf

user www-data;
worker_processes ;
pid /run/nginx.pid;events {
worker_connections ;
}http {
sendfile on;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout ;
types_hash_max_size ; include /etc/nginx/mime.types;
default_type application/octet-stream; access_log /var/log/nginx/access.log;
error_log /var/log/nginx/error.log; server {
listen default_server;
server_name test;
charset utf-; location / {
root html;
index index.html index.htm;
proxy_set_header X-Real_IP $remote_addr;
client_max_body_size 100m;
}
}
}

sudo service nginx start

sudo service nginx stop

tar –zxvf keepalived-1.2..tar.gz
cd keepalived-1.2.
./configure --prefix=/usr/local/keepalived
make
sudo make install

sudo apt-get install libssl.dev

sudo ln -s /usr/local/keepalived/sbin/keepalived /sbin/
sudo ln -s /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/
sudo ln -s /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/

sudo keepalived -D -f /usr/local/keepalived/etc/keepalived/keepalived.conf

sudo killall keepalived

global_defs {
router_id NODEA
}vrrp_instance VI_1 {
state MASTER
interface eth0 #监测网络接口
virtual_router_id #主、备必须一样
priority #优先级：主＞备
advert_int
authentication {
auth_type PASS #VRRP认证，主备一致
auth_pass #密码
}virtual_ipaddress {
192.168.174.140/ #VRRP HA虚拟地址
}
}

global_defs {
router_id NODEB
}vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id
priority
advert_int
authentication {
auth_type PASS
auth_pass
} virtual_ipaddress {
192.168.174.140/
}
}

global_defs {
router_id NODEA
}vrrp_script chk_http_port {
script "/home/jimite/keepalived/chk_nginx_pid.sh"
interval
weight
}vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id
priority
advert_int
authentication {
auth_type PASS
auth_pass
}
track_script {
chk_http_port
}
virtual_ipaddress {
192.168.174.140/
}
}

global_defs {
router_id NODEB
}vrrp_script chk_http_port {
script "/home/jihite/keepalived/chk_nginx_pid.sh"
interval
weight
}vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id
priority
advert_int
authentication {
auth_type PASS
auth_pass
}
track_script {
chk_http_port
} virtual_ipaddress {
192.168.174.140/
}
}

#!/bin/bash
A=`ps -C nginx --no-header |wc -l`
if [ $A -eq ]
then
echo 'nginx server is died'
sudo killall keepalived
fi