架构图：
一、环境准备
- 时间同步，确保NTP或Chrony服务正常运行。
- 防火墙规则
- 禁用SELinux
- 四台主机
| IP | 主机名 | 服务 | 软件 |
| 10.0.1.8 | proxy | 调度器 | Nginx |
| 10.0.1.17 | redis | redis | Redis |
| 10.0.1.18 | t1 | tomcat1 | Tomcat8、JDK8 |
| 10.0.1.28 | t2 | Tomcat2 | Tomcat8、JDK8 |
二、一键安装Tomcat
#!/bin/bash #Date 2020-12-7 #Author yds #源码包放在/root目录下 . /etc/init.d/functions set -e JDK_DIR="/usr/local" TOMCAT_DIR="/usr/local/src" JDK_PKG="jdk-8u271-linux-x64.tar.gz" TOMCAT_PKG="apache-tomcat-8.5.50.tar.gz" DIR=`pwd` install_jdk(){ tar xvf $DIR/$JDK_PKG -C $JDK_DIR cd $JDK_DIR && ln -s jdk1.8.* jdk cat > /etc/profile.d/jdk.sh <<EOF export JAVA_HOME=$JDK_DIR/jdk export JRE_HOME=$JAVA_HOME/jre export CLASSPATH=$JAVA_HOME/lib/:$JRE_HOME/lib/ export PATH=$PATH:$JAVA_HOME/bin EOF . /etc/profile.d/jdk.sh } install_tomcat(){ tar xvf $DIR/$TOMCAT_PKG -C $TOMCAT_DIR cd $TOMCAT_DIR && ln -s apache-tomcat-8.5.50 tomcat echo "PATH=$TOMCAT_DIR/tomcat/bin:"'$PATH' > /etc/profile.d/tomcat.sh . /etc/profile.d/tomcat.sh id tomcat &> /dev/null || useradd -r -s /sbin/nologin tomcat cat > $TOMCAT_DIR/tomcat/conf/tomcat.conf <<EOF JAVA_HOME=$JDK_DIR/jdk EOF chown -R tomcat.tomcat $TOMCAT_DIR/tomcat/ cat > /lib/systemd/system/tomcat.service <<EOF [Unit] Description=Tomcat #After=syslog.target network.target remote-fs.target nss-lookup.target After=syslog.target network.target [Service] Type=forking EnvironmentFile=$TOMCAT_DIR/tomcat/conf/tomcat.conf ExecStart=$TOMCAT_DIR/tomcat/bin/startup.sh ExecStop=$TOMCAT_DIR/tomcat/bin/shutdown.sh RestartSec=3 PrivateTmp=true User=tomcat Group=tomcat [Install] WantedBy=multi-user.target EOF systemctl daemon-reload systemctl enable --now tomcat.service && action "安装成功" || action "安装失败" } install_jdk install_tomcat
三、安装并配置Redis（这里redis没有设置密码）
[root@redis ~]#dnf -y install redis [root@redis ~]#sed -i.bak 's/^bind.*/bind 0.0.0.0/' /etc/redis.conf [root@redis ~]#systemctl enable --now redis
四、修改tomcat配置指定redis服务器地址，并构建jsp测试页面
[root@t1 ~]#vim /usr/local/src/tomcat/conf/context.xml
<Context> ... <Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager" memcachedNodes="redis://10.0.1.17:6379" sticky="false" sessionBackupAsync="false" lockingMode="uriPattern:/path1|/path2" requestUriIgnorePattern=".*.(ico|png|gif|jpg|css|js)$" transcoderFactoryClass="de.javakaffee.web.msm.serializer.kryo.KryoTranscoderFactory" /> </Context>
[root@t1 ~]#cd /usr/local/src/tomcat/
[root@t1 tomcat]#mkdir -p /data/webapps/ROOT
[root@t1 tomcat]#vi /data/webapps/ROOT/index.jsp
<%@ page import="java.util.*" %> <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>tomcat test</title> </head> <body> <h1> tomcat website1 </h1> <div>On <%=request.getServerName() %></div> <div><%=request.getLocalAddr() + ":" + request.getLocalPort() %></div> <div>SessionID = <span style="color:blue"><%=session.getId() %></span></div> <%=new Date()%> </body> </html>
[root@t1 tomcat]#vi conf/server.xml
... <Engine name="Catalina" defaultHost="t1.magedu.org" jvmRoute="Tomcat1"> ... <Host name="t1.magedu.org" appBase="/data/webapps" unpackWARs="true" autoDeploy="true"> ...
[root@t1 ~]#systemctl restart tomcat
查看日志
[root@t1 ~]#tail -f /usr/local/src/tomcat/logs/catalina.out
- operation timeout: 1000 - node ids: [] - failover node ids: [] - storage key prefix: null - locking mode: uriPattern:/path1|/path2 (expiration: 5s) -------- 14-Dec-2020 10:14:13.567 INFO [t1.magedu.org-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [/data/webapps/ROOT] has finished in [888] ms 14-Dec-2020 10:14:13.573 INFO [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["http-nio-8080"] 14-Dec-2020 10:14:13.607 INFO [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["ajp-nio-8009"] 14-Dec-2020 10:14:13.609 INFO [main] org.apache.catalina.startup.Catalina.start Server startup in 1005 ms
t2和t1配置相同
[root@t2 ~]#vim /usr/local/src/tomcat/conf/context.xml
<Context> ... <Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager" memcachedNodes="redis://10.0.1.17:6379" sticky="false" sessionBackupAsync="false" lockingMode="uriPattern:/path1|/path2" requestUriIgnorePattern=".*.(ico|png|gif|jpg|css|js)$" transcoderFactoryClass="de.javakaffee.web.msm.serializer.kryo.KryoTranscoderFactory" /> </Context>
[root@t2 tomcat]#mkdir -p /data/webapps/ROOT/
[root@t2 tomcat]#vim /data/webapps/ROOT/index.jsp
<%@ page import="java.util.*" %> <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>tomcat test</title> </head> <body> <h1> tomcat website2 </h1> <div>On <%=request.getServerName() %></div> <div><%=request.getLocalAddr() + ":" + request.getLocalPort() %></div> <div>SessionID = <span style="color:blue"><%=session.getId() %></span></div> <%=new Date()%> </body> </html>
[root@t2 tomcat]#chown -R tomcat.tomcat /data/webapps/ROOT/
[root@t2 ~]#systemctl restart tomcat
五、上传tomcat session管理工具包至/usr/local/src/tomcat/lib目录下
六、修改nginx配置（Nginx安装过程比较简单，这里就省略了）
[root@proxy ~]#vi /apps/nginx/conf/nginx.conf
http { ...... upstream tomcat-server { #ip_hash; server t1.magedu.org:8080; server t2.magedu.org:8080; } server { ...... location / { } location ~* .(jsp|do)$ { proxy_pass http://tomcat-server; }
修改之后重启Nginx
最后分别重启Redis，Nginx,tomcat服务
访问测试
重复刷新页面,可以看到SessionID不变，说明配置成功。
使用redis工具连接redis 查看SessionID
[root@redis ~]#redis-cli 127.0.0.1:6379> keys * 1) "70ACB6451F7564A4288D8242C8EF0179.Tomcat2" 2) "validity:0E48B447DCA7E79634C19162A188269D.Tomcat2" 3) "validity:70ACB6451F7564A4288D8242C8EF0179.Tomcat2" 4) "5936E7DCEC7E62791C636B013D314DBF.Tomcat1" 5) "0E48B447DCA7E79634C19162A188269D.Tomcat2" 6) "validity:5936E7DCEC7E62791C636B013D314DBF.Tomcat1" 127.0.0.1:6379> get 70ACB6451F7564A4288D8242C8EF0179.Tomcat2 "x00x02x00\x00x00x01v_x06xf2Nx00x00x01v_x06xf2Nx00x00a11x00x00x01v_x06xf2Px00x00x01v_x06xf2x97x00(70ACB6451F7564A4288D8242C8EF0179.Tomcat2x00x00x00x00x00x00x00x00x01x00" 127.0.0.1:6379>
备注tomcat-cluster-redis-session-manager相关jar包下载地址
链接：https://pan.baidu.com/s/1sMzr-2YlLbq-MO4F0XmxCA
提取码：knf9