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Nginx+tomcat负载均衡session问题解决
canca
2016-07-01 09:27
2
0
测试环境:
server1 服务器上安装了 nginx + tomcat01
server2 服务器上只安装了 tomcat02
server1 IP 地址:
192.168
.
2.88
server2 IP 地址:
192.168
.
2.89
安装步骤:
1
. 在server1 上安装配置 nginx + nginx_upstream_jvm_route
shell $> wget -c http:
//sysoev.ru/nginx/nginx-0.7.61.tar.gz
shell $> svn checkout http:
//nginx-upstream-jvm-route.googlecode.com/svn/trunk/ nginx-upstream-jvm-route-read-on
ly
shell $> tar zxvf nginx-
0.7
.
61
shell $> cd nginx-
0.7
.
61
shell $> patch -p0 < ../nginx-upstream-jvm-route-read-on
ly/jvm_route.patch
shell $> useradd www
shell $> ./configure --user=www --group=www --prefix=/usr/local
//nginx --with-http_stub_status_module --with-http_ssl_module --add-module=/root/nginx-upstream-jvm-route-read-on
ly
shell $> make
shell $> make install
2
.分别在两台机器上安装 tomcat和java (略)
设置tomcat的server.xml, 在两台服务器的tomcat的配置文件中分别找到:
<Engine name=
"Catalina"
defaultHost=
"localhost"
>
分别修改为:
Tomcat01:
<Engine name=
"Catalina"
defaultHost=
"localhost"
jvmRoute=
"a"
>
Tomcat02:
<Engine name=
"Catalina"
defaultHost=
"localhost"
jvmRoute=
"b"
>
并在webapps下面建立aa文件夹,在里面建立要测试的index.jsp文件,内容如下:
<%@ page language=
"java"
imp
ort
=
"java.util.*"
pageEncoding=
"UTF-8"
%>
<%
%>
<html>
<head>
</head>
<body>
88
<!--server1 这里为
88
-->
<br />
<%out.print(request.getSession()) ;%>
<!--输出session-->
<br />
<%out.println(request.getHeader(
"Cookie"
)); %>
<!--输出Cookie-->
</body>
</html>
两个tomcat一样只需要修改红色的部分
分别启动两个tomcat
3
.设置nginx
shell $> cd /usr/local/nginx/conf
shell $> mv nginx.conf nginx.bak
shell $> vi nginx.conf
## 以下是配置 ###
user www www;
worker_processes
4
;
error_log logs/nginx_error.log crit;
pid /usr/local/nginx/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
2048
;
}
http
{
upstream backend {
server
192.168
.
2.88
:
8080
srun_id=a;
server
192.168
.
2.89
:
8080
srun_id=b;
jvm_route $cookie_JSESSIONID|sessionid reverse;
}
include mime.types;
default_type application/octet-stream;
#charset gb2312;
charset UTF-
8
;
server_names_hash_bucket_size
128
;
client_header_buffer_size 32k;
large_client_header_buffers
4
32k;
client_max_body_size 20m;
limit_rate 1024k;
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-javas
cript text/css application/xml;
gzip_vary on;
#limit_zone crawler $binary_remote_addr 10m;
server
{
listen
80
;
server_name
192.168
.
2.88
;
index index.html index.htm index.jsp;
root /var/www;
#location ~ .*\.jsp$
location / aa/
{
proxy_pass http:
//backend;
proxy_redirect off;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header Host $http_host;
}
location ~ .*\.(gif|jpg|jpeg|png|bmp|swf)$
{
expires 30d;
}
location ~ .*\.(js|css)?$
{
expires 1h;
}
location /Nginxstatus {
stub_status on;
access_log off;
}
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 off;
}
}
4
.测试
打开浏览器,输入:http:
//192.168.2.88/aa/
刷新了N次还都是
88
,也就是补丁起作用了,cookie 值也获得了,为了测试,我又打开了“遨游浏览器”(因为session 和 cookie问题所以从新打开别的浏览器),输入网址:
http:
//192.168.2.88/aa/
显示
89
,刷新N次后还是
89
,大家测试的时候如果有疑问可一把 nginx 配置文件的
srun_id=a srun_id=b 去掉,然后在访问,就会知道页面是轮询访问得了!!
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