tomcat8 + nginx + memcached + cas 实现负载均衡的配置

1，tomcat8的配置：

         1.1修改tomcat8.x/conf/context.xml的配置如下:

<?xml version="1.0" encoding="UTF-8"?>
<!--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements.  See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License.  You may obtain a copy of the License at
 http://www.apache.org/licenses/LICENSE-2.0 
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<!-- The contents of this file will be loaded for each web application -->
<Context>

<!-- Default set of monitored resources. If one of these changes, the    -->
<!-- web application will be reloaded.                                   -->
<WatchedResource>WEB-INF/web.xml</WatchedResource>
<WatchedResource>${catalina.base}/conf/web.xml</WatchedResource>

<!-- Uncomment this to disable session persistence across Tomcat restarts -->
<!--
<Manager pathname="" />

<Resources cachingAllowed="true" cacheMaxSize="100000" />
<Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager"
memcachedNodes="n1:127.0.0.1:11211"
username="root"
password=""
sticky="false"
sessionBackupAsync="false"
lockingMode="uriPattern:/path1|/path2"
requestUriIgnorePattern=".*\.(ico|png|gif|jpg|css|js)$"
transcoderFactoryClass="de.javakaffee.web.msm.serializer.kryo.KryoTranscoderFactory"
/>
-->
<Resources cachingAllowed="true" cacheMaxSize="100000" />
<Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager"
memcachedNodes="n1:127.0.0.1:11211"
username="root"
password=""
sticky="false"
sessionBackupAsync="false"
lockingMode="uriPattern:/path1|/path2"
requestUriIgnorePattern=".*\.(ico|png|gif|jpg|css|js)$"
sessionBackupTimeout="18000"
transcoderFactoryClass="de.javakaffee.web.msm.serializer.javolution.JavolutionTranscoderFactory"
copyCollectionsForSerialization="false"
/>
</Context>

第一个参数：localhost:11211 为Memcached服务器   多台以逗号分隔。第二个参数：memcached服务器的用户名第三个参数memcached服务器的密码配置OK。

1.2添
4000
加memcached如下依赖的jar包到tomcat8.x/lib/:

asm-5.1.jar
couchbase-client-1.4.12.jar
javolution-5.5.1.jar
kryo-4.0.0.jar
kryo-serializers-0.38.jar
memcached-session-manager-2.0.0.jar
memcached-session-manager-tc8-2.0.0.jar
minlog-1.3.jar
msm-javolution-serializer-2.0.0.jar
msm-kryo-serializer-2.0.0.jar
msm-xstream-serializer-2.0.0.jar
objenesis-2.1.jar
reflectasm-1.09.jar
spymemcached-2.12.1.jar

2，nginx的配置：

#user  nobody;
worker_processes  1;

#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

#pid        logs/nginx.pid;

events {
worker_connections  1024;
}

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"';

access_log  logs/access.log  main;

client_header_timeout 3m;

client_body_timeout 3m;

send_timeout 3m;

sendfile        on;

tcp_nopush     on;

tcp_nodelay on;

#keepalive_timeout  0;
keepalive_timeout  65;

gzip  on;

#设定负载均衡的服务器列表

upstream 127.0.0.1 {

#设定负载均衡的服务器列表

#ip_hash;

#同一机器在多网情况下，路由切换，ip可能不同 #weigth参数表示权值，权值越高被分配到的几率越大
server 127.0.0.1:8085 weight=1 max_fails=20 fail_timeout=600s;
server 127.0.0.1:8086 weight=1 max_fails=20 fail_timeout=600s;
}

map $http_upgrade $connection_upgrade {
default upgrade;
'' close;
}

server {
listen 80;
server_name localhost;

charset UTF-8;

#设定本虚拟主机的访问日志

access_log  logs/host.access.log  main;

#对 "/" 所有应用启用负载均衡
location / {

proxy_pass http://127.0.0.1; 
#保留用户真实信息
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";

index  index.html index.htm index.aspx;
}

#对 "/Dossm3RabbitMQConsumer/" 启用负载均衡
location /Dossm3RabbitMQConsumer/ {

proxy_pass http://localhost:8086; 
#保留用户真实信息
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";

index  index.html index.htm index.aspx;
}

}

# another virtual host using mix of IP-, name-, and port-based configuration
#
#server {
#    listen       8000;
#    listen       somename:8080;
#    server_name  somename  alias  another.alias;

#    location / {
#        root   html;
#        index  index.html index.htm;
#    }
#}

# HTTPS server
#
#server {
#    listen       443 ssl;
#    server_name  localhost;

#    ssl_certificate      cert.pem;
#    ssl_certificate_key  cert.key;

#    ssl_session_cache    shared:SSL:1m;
#    ssl_session_timeout  5m;

#    ssl_ciphers  HIGH:!aNULL:!MD5;
#    ssl_prefer_server_ciphers  on;

#    location / {
#        root   html;
#        index  index.html index.htm;
#    }
#}

}

3，cas的配置（）：

3.1 修改/CAS/WEB-INF/spring-configuration/ticketRegistry.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--

    Licensed to Jasig under one or more contributor license
    agreements. See the NOTICE file distributed with this work
    for additional information regarding copyright ownership.
    Jasig licenses this file to you under the Apache License,
    Version 2.0 (the "License"); you may not use this file
    except in compliance with the License.  You may obtain a
    copy of the License at the following location:

      http://www.apache.org/licenses/LICENSE-2.0 
    Unless required by applicable law or agreed to in writing,
    software distributed under the License is distributed on an
    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    KIND, either express or implied.  See the License for the
    specific language governing permissions and limitations
    under the License.

-->
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:util="http://www.springframework.org/schema/util"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd         http://www.springframework.org/schema/util         http://www.springframework.org/schema/util/spring-util.xsd">     <description>
    	Configuration for the default TicketRegistry which stores the tickets in-memory and cleans them out as specified intervals.
    </description>
    
  <!-- memcached 配置开始 -->
  <!-- Ticket Registry -->
  <bean id="ticketRegistry" class="org.jasig.cas.ticket.registry.MemCacheTicketRegistry">  
    <constructor-arg index="0">  
      <bean class="net.spy.memcached.spring.MemcachedClientFactoryBean"  
            p:servers="127.0.0.1:11211"  
            p:protocol="BINARY"  
            p:locatorType="ARRAY_MOD"  
            p:failureMode="Redistribute"  
            p:transcoder-ref="serialTranscoder">  
        <property name="hashAlg">  
          <util:constant static-field="net.spy.memcached.DefaultHashAlgorithm.FNV1A_64_HASH" />  
        </property>  
      </bean>  
    </constructor-arg>  
    <!--     TGT timeout in seconds -->
    <constructor-arg index="1" value="36000" />  
    <!--     ST timeout in seconds -->
    <constructor-arg index="2" value="2" />  
  </bean>  
  
  <bean id="serialTranscoder" class="net.spy.memcached.transcoders.SerializingTranscoder" p:compressionThreshold="2048" /> 
  <!-- memcached 配置结束 -->

<!--Quartz -->
 	<!-- 默认配置开始 -->
 	<!-- Ticket Registry -->
  	<!-- <bean id="ticketRegistry" class="org.jasig.cas.ticket.registry.DefaultTicketRegistry" />-->
<!-- 	TICKET REGISTRY CLEANER  -->
<!-- <bean id="ticketRegistryCleaner" class="org.jasig.cas.ticket.registry.support.DefaultTicketRegistryCleaner"
p:ticketRegistry-ref="ticketRegistry"
p:logoutManager-ref="logoutManager" />

<bean id="jobDetailTicketRegistryCleaner" class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean"
p:targetObject-ref="ticketRegistryCleaner"
p:targetMethod="clean" />

<bean id="triggerJobDetailTicketRegistryCleaner" class="org.springframework.scheduling.quartz.SimpleTriggerBean"
p:jobDetail-ref="jobDetailTicketRegistryCleaner"
p:startDelay="200000"
p:repeatInterval="50000000" />  -->
<!-- 默认配置结束 -->
   
</beans>

第一个参数：

localhost:11211 为Memcached服务器   多台以逗号分隔。

第二个参数：

TGT票据在多少秒超时。

第三个参数

ST票据在多少秒超时。

compressionThreshold：启用了压缩，增加或减小需压缩的包的大小限制。

配置OK。

3.2 添加cas和memcached整合的如下依赖jar包到/CAS/WEB-INF/lib:

cas-server-integration-memcached-4.0.0.jar
mockito-core-2.1.0-RC.1.jar
spymemcached-2.11.2.jar

参考CAS官方配置:https://apereo.github.io/cas/4.2.x/installation/Memcached-Ticket-Registry.html