linux+nginx+tomcat负载均衡，实现session同步 -优快云博客

花了一个上午的时间研究nginx+tomcat的负载均衡测试，集群环境搭建比较顺利，但是session同步的问题折腾了几个小时才搞定，现把我的过程贴上来，以备用。
软件及环境是：
虚拟机上装centos 5.5
IP为：192.168.0.51 装上nginx和tomcat 6.0.32 命名为 Tomcat1
一台win7上装tomcat 6.0.32 IP为：192.168.0.50 命名为 Tomcat2

首先装nginx，我是参照http://blog.s135.com/nginx_php_v6/ 配了一个Nginx + PHP（FastCGI）环境，然后再加上Tomcat的转发。
我的nginx.conf 修改如下

#######################################################################

# This is the main Nginx configuration file.

# More information about the configuration options is available on

# * the English wiki - http: // wiki.nginx.org/Main

# * the Russian documentation - http: // sysoev.ru/nginx/

#######################################################################

# ----------------------------------------------------------------------

# Main Module - directives that cover basic functionality

# http: // wiki.nginx.org/NginxHttpMainModule

# ----------------------------------------------------------------------

user nginx;

worker_processes 8 ;

error_log / var / log / nginx / error.log;

#error_log / var / log / nginx / error.log notice;

#error_log / var / log / nginx / error.log info;

pid / var / run / nginx.pid;

# ----------------------------------------------------------------------

# Events Module

# http: // wiki.nginx.org/NginxHttpEventsModule

# ----------------------------------------------------------------------

events

{

worker_connections 10240 ;

}

# ----------------------------------------------------------------------

# HTTP Core Module

# http: // wiki.nginx.org/NginxHttpCoreModule

# ----------------------------------------------------------------------

http

{

include / etc / nginx / 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" ' ;

access_log / var / log / nginx / access.log main;

server_names_hash_bucket_size 128 ;

client_header_buffer_size 32k;

large_client_header_buffers 4 32K;

client_max_body_size 8m;

sendfile on;

tcp_nopush on;

#keepalive_timeout 0 ;

keepalive_timeout 65 ;

#gzip on;

gzip_min_length 1k;

gzip_buffers 4 16k;

gzip_http_version 1.1 ;

gzip_comp_level 2 ;

gzip_types text / plain application / x - javascript text / css application / xml;

gzip_vary on;

upstream tserver

{

server 192.168 . 0.51 : 8080 weight = 1 ;

server 192.168 . 0.50 : 8080 weight = 1 ;

}

# The default server

server

{

listen 80 ;

server_name _;

#charset koi8 - r;

#access_log logs / host.access.log main;

location ~ . * \.(php | php5) ? $

{

root / www / ROOT;

#fastcgi_pass unix: / tmp / php - cgi.sock;

fastcgi_pass 127.0 . 0.1 : 9000 ;

fastcgi_index index.php;

include fcgi.conf;

}

location ~ \.(jsp | jspx | do | htm) ? $

{

proxy_set_header Host $host;

proxy_set_header X - Real - IP $remote_addr;

proxy_pass http: // tserver;#转向tomcat处理

}

location ~ ( / dwr / ) ?

{

proxy_set_header Host $host;

proxy_set_header X - Real - IP $remote_addr;

proxy_pass http: // tserver;#转向tomcat处理

}

location /

{

root / www / ROOT;

index index.html index.jsp default .jsp index. do default . do ;

}

error_page 404 / 404 .html;

location = / 404 .html

{

root / www / ROOT;

}

# redirect server error pages to the static page / 50x.html

error_page 500 502 503 504 / 50x.html;

location = / 50x.html

{

root / www / ROOT;

}

# proxy the PHP scripts to Apache listening on 127.0 . 0.1 : 80

#location ~ \.php$

{

# proxy_pass http: // 127.0.0.1;

# pass the PHP scripts to FastCGI server listening on 127.0 . 0.1 : 9000

#location ~ \.php$

{

# root html;

# fastcgi_pass 127.0 . 0.1 : 9000 ;

# fastcgi_index index.php;

# fastcgi_param SCRIPT_FILENAME / scripts$fastcgi_script_name;

# include fastcgi_params;

# deny access to .htaccess files, if Apache ' s document root

# concurs with nginx ' s one

#location ~ / \.ht

{

# deny all;

}

# Load config files from the / etc / nginx / conf.d directory

include / etc / nginx / conf.d /**/ /* .conf;

}

下一步是配置Tomcat集群。分别打开tomcat1和tomcat2下conf中server.xml
<Server port="8005 " shutdown="SHUTDOWN">

<Connector port="8080 " maxHttpHeaderSize="8192"
maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
enableLookups="false" redirectPort="8443" acceptCount="100"
connectionTimeout="20000" disableUploadTimeout="true" />

<Connector port="8009 " enableLookups="false" redirectPort="8443" protocol="AJP/1.3" />

找到<Engine name="Catalina" defaultHost="localhost">
Tomcat1下的修改为<Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcat1">
Tomcat2下的修改为<Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcat2">

tomcat1找到
<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/>
修改为

< Cluster className = " org.apache.catalina.ha.tcp.SimpleTcpCluster "

channelSendOptions = " 6 " >

< Manager className = " org.apache.catalina.ha.session.DeltaManager "

expireSessionsOnShutdown = " false "

notifyListenersOnReplication = " true " />

<!--

< Manager className = " org.apache.catalina.ha.session.BackupManager "

expireSessionsOnShutdown = " false "

notifyListenersOnReplication = " true "

mapSendOptions = " 6 " />

-->

< Channel className = " org.apache.catalina.tribes.group.GroupChannel " >

< Membership className = " org.apache.catalina.tribes.membership.McastService "

address = " 228.0.0.5 "

bind = " 192.168.0.51 "

port = " 45564 "

frequency = " 500 "

dropTime = " 3000 " />

< Receiver className = " org.apache.catalina.tribes.transport.nio.NioReceiver "

address = " 192.168.0.51 "

autoBind = " 100 "

port = " 4001 "

selectorTimeout = " 100 "

maxThreads = " 6 " />

< Sender className = " org.apache.catalina.tribes.transport.ReplicationTransmitter " >

< Transport className = " org.apache.catalina.tribes.transport.nio.PooledParallelSender " />

</ Sender >

< Interceptor className = " org.apache.catalina.tribes.group.interceptors.TcpFailureDetector " />

< Interceptor className = " org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interceptor " />

</ Channel >

< Valve className = " org.apache.catalina.ha.tcp.ReplicationValve " filter = " .*\.gif;.*\.js;.*\.jpg;.*\.png;.*\.htm;.*\.html;.*\.css;.*\.txt; " />

< ClusterListener className = " org.apache.catalina.ha.session.JvmRouteSessionIDBinderListener " />

< ClusterListener className = " org.apache.catalina.ha.session.ClusterSessionListener " />

</ Cluster >

tomcat2找到
<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/>
修改为

< Cluster className = " org.apache.catalina.ha.tcp.SimpleTcpCluster "

channelSendOptions = " 6 " >

< Manager className = " org.apache.catalina.ha.session.DeltaManager "

expireSessionsOnShutdown = " false "

notifyListenersOnReplication = " true " />

<!--

< Manager className = " org.apache.catalina.ha.session.BackupManager "

expireSessionsOnShutdown = " false "

notifyListenersOnReplication = " true "

mapSendOptions = " 6 " />

-->

< Channel className = " org.apache.catalina.tribes.group.GroupChannel " >

< Membership className = " org.apache.catalina.tribes.membership.McastService "

address = " 228.0.0.5 "

bind = " 192.168.0.50 "

port = " 45564 "

frequency = " 500 "

dropTime = " 3000 " />

< Receiver className = " org.apache.catalina.tribes.transport.nio.NioReceiver "

address = " 192.168.0.50 "

autoBind = " 100 "

port = " 4000 "

selectorTimeout = " 100 "

maxThreads = " 6 " />

< Sender className = " org.apache.catalina.tribes.transport.ReplicationTransmitter " >

< Transport className = " org.apache.catalina.tribes.transport.nio.PooledParallelSender " />

</ Sender >

< Interceptor className = " org.apache.catalina.tribes.group.interceptors.TcpFailureDetector " />

< Interceptor className = " org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interceptor " />

</ Channel >

< Valve className = " org.apache.catalina.ha.tcp.ReplicationValve " filter = " .*\.gif;.*\.js;.*\.jpg;.*\.png;.*\.htm;.*\.html;.*\.css;.*\.txt; " />

< ClusterListener className =