tomcat結合memcached構建session服務器

memcached服務器兩臺：192.168.223.136,192.168.223.137

tomcat多實例：192.168.233.146:8081,192.168.223.146:8082

for tomcat configure(這裏使用的tomcat8的版本)

參考：https://github.com/magro/memcached-session-manager/wiki/SetupAndConfiguration

Add memcached-session-manager jars to tomcat

wget http://repo1.maven.org/maven2/de/javakaffee/msm/memcached-session-manager/2.1.1/memcached-session-manager-2.1.1.jar

wget http://repo1.maven.org/maven2/de/javakaffee/msm/memcached-session-manager-tc8/2.1.1/memcached-session-manager-tc8-2.1.1.jar

wget http://repo1.maven.org/maven2/net/spy/spymemcached/2.11.1/spymemcached-2.11.1.jar

下載須要的memcached的三個jar文件

將這三個jar文件複製到$CATALINA_HOME/lib/目錄下

因爲採用的多實例

export CATALINA_HOME=/usr/local/apache-tomcat-8.5.16
export CATALINA_BASE=/usr/local/tomcat-instance/tomcat1

若是僅僅只是用java來作序列化器只須要這三個包就ok

配置tomcat多實例：

tomcat1的添加配置以下：

<Context path="" docBase="ROOT" reloadable="true">
    <Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager"
　　memcachedNodes="n1:192.168.223.136:11211,n2:192.168.223.137:11211"       這裏的ip就是memcached服務器的兩個ip
　　failoverNodes="n1"
　　requestUriIgnorePattern=".*\.(ico|png|gif|jpg|css|js)$"
    />
</Context>

將紅色添加的部分放進各應用程序的context組件內

tomcat2的添加配置和tomcat1同樣：

<Context path="" docBase="ROOT" reloadable="true">
    <Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager"
　　memcachedNodes="n1:192.168.223.136:11211,n2:192.168.223.137:11211"
　　failoverNodes="n1"
　　requestUriIgnorePattern=".*\.(ico|png|gif|jpg|css|js)$"
     />
</Context>

開啓各自的tomcat的服務

接下來配置memcached服務器，這裏採用的yum安裝：

yum install memcached -y（兩臺服務器192.168.223.136，192.168.223.137分別都給裝上）

訪問中能夠看見session會話保持已經成功，查看memcached緩存信息：

[root@wadeson ~]# memcached-tool 127.0.0.1
# Item_Size Max_age Pages Count Full? Evicted Evict_Time OOM
6 304B 553s 1 2 no 0 0 0

 

而後只須要配置前端代理到tomcat便可實現負載均衡

 

另補充：

若是須要採用其餘的序列進行session保持：

一、Example for sticky sessions + kryo（須要的包

• kryo-serializer: msm-kryo-serializer, kryo-serializers-0.34+, kryo-3.x, minlog, reflectasm, asm-5.x, objenesis-2.x

）

<Context>
  ...
  <Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager" memcachedNodes="n1:host1.yourdomain.com:11211,n2:host2.yourdomain.com:11211" failoverNodes="n1" requestUriIgnorePattern=".*\.(ico|png|gif|jpg|css|js)$" transcoderFactoryClass="de.javakaffee.web.msm.serializer.kryo.KryoTranscoderFactory" /> </Context>

二、javolution-serializer: msm-javolution-serializer, javolution-5.4.3.

<Context>

 <Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager"

 memcachedNodes="n1:192.168.1.155:11211,n2:192.168.1.11:11211"

 failoverNodes="n1"

requestUriIgnorePattern=".*\.(ico|png|gif|jpg|css|js)$"

transcoderFactoryClass="de.javakaffee.web.msm.serializer.javolution.javolutionTranscoderFactory" 各個序列器就這裏作了變化

/>

</Context>

3、If you're using Redis, you need the jedis-2.9.0.jar.更多詳情參考：https://github.com/magro/memcached-session-manager/wiki/SetupAndConfiguration