memcached伺服器兩臺:192.168.223.136,192.168.223.137
tomcat多例項:192.168.233.146:8081,192.168.223.146:8082
for tomcat configure(這裡使用的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
下載需要的memcached的三個jar檔案
將這三個jar檔案複製到$CATALINA_HOME/lib/目錄下
由於採用的多例項
export CATALINA_HOME=/usr/local/apache-tomcat-8.5.16
export CATALINA_BASE=/usr/local/tomcat-instance/tomcat1
如果僅僅只是用java來做序列化器只需要這三個包就ok
配置tomcat多例項:
tomcat1的新增配置如下:
<Context path="" docBase="ROOT" reloadable="true">
<Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager"
memcachedNodes="n1:192.168.223.136:11211,n2:192.168.223.137:11211" 這裡的ip就是memcached伺服器的兩個ip
failoverNodes="n1"
requestUriIgnorePattern=".*\.(ico|png|gif|jpg|css|js)$"
/>
</Context>
將紅色新增的部分放進各應用程式的context元件內
tomcat2的新增配置和tomcat1一樣:
<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)$"
/>
</Context>
開啟各自的tomcat的服務
接下來配置memcached伺服器,這裡採用的yum安裝:
yum install memcached -y(兩臺伺服器192.168.223.136,192.168.223.137分別都給裝上)
訪問中可以看見session會話保持已經成功,檢視memcached快取資訊:
[root@wadeson ~]# memcached-tool 127.0.0.1
# Item_Size Max_age Pages Count Full? Evicted Evict_Time OOM
6 304B 553s 1 2 no 0 0 0
然後只需要配置前端代理到tomcat即可實現負載均衡
另補充:
如果需要採用其他的序列進行session保持:
1、Example for sticky sessions + kryo(需要的包
- kryo-serializer: msm-kryo-serializer, kryo-serializers-0.34+, kryo-3.x, minlog, reflectasm, asm-5.x, objenesis-2.x
)
<Context> ... <Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager" memcachedNodes="n1:host1.yourdomain.com:11211,n2:host2.yourdomain.com:11211" failoverNodes="n1" requestUriIgnorePattern=".*\.(ico|png|gif|jpg|css|js)$" transcoderFactoryClass="de.javakaffee.web.msm.serializer.kryo.KryoTranscoderFactory" /> </Context>
2、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" 各個序列器就這裡做了變化
/>
</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