nginx+tomcat9+redisson+redis+jdk1.8簡單實現session共享
一、環境安裝
由於資源限制，在虛擬機器中模擬測試，一臺虛擬機器，所有軟體均安裝到該虛擬機器內
安裝系統：CentOS Linux release 7.4.1708 (Core)
CentOS安裝選擇版本：Basic Web Server
redis版本：5.0.2
jdk版本：1.8.0_191
nginx版本：1.14.1
tomcat版本：9.0.13
1、安裝gcc
yum -y installed gcc
2、安裝redis
2.1、解壓
tar -zxvf redis-5.0.2.tar.gz -C /usr/local/
2.2、進入redis安裝目錄
cd /usr/local/redis-5.0.2
2.3、安裝
make && make install
2.4、啟動redis
/usr/local/redis-5.0.2/src/redis-server --protected-mode no &
3、安裝jdk
3.1、查詢已安裝jdk
rpm -qa | grep jdk | grep -v grep
3.2、若為openjdk或者非1.8版本，則解除安裝
rpm -e --nodeps “具體安裝jdk”
3.3、安裝
rpm -ivh jdk-8u191-linux-x64.rpm
3.4、設定環境變數
/etc/profile中新增如下配置
export JAVA_HOME=/usr/java/jdk1.8.0_191-amd64/ export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar export PATH=$PATH:$JAVA_HOME/bin/
3.5、使配置生效
source /etc/profile
4、安裝tocmat
4.1、新建兩個tocmat
tar -zxvf apache-tomcat-9.0.13.tar.gz -C /usr/local/ cd /usr/local/ mvapache-tomcat-9.0.13 tocmat1 tar -zxvf apache-tomcat-9.0.13.tar.gz -C /usr/local/ cd /usr/local/ mv apache-tomcat-9.0.13 tocmat2
4.2、配置tomcat埠
tomcat1 Connector port改為8081
tomcat2 server port改為8006，Connector port改為8082，AJP Connector port改為8010
如果有需要，可在tomcat/bin目錄下新建setenv.sh檔案，來設定記憶體大小等引數，也可在catalina.sh中直接設定,本例屬於測試，未進行該設定
CATALINA_PID="$CATALINA_BASE/tomcat.pid" JAVA_OPTS="-server -Xms1000m -Xmx1000m -XX:PermSize=128M -XX:MaxPermSize=128M" export JAVA_OPTS export JAVA_HOME=$JAVA_HOME
5、安裝nginx
5.1、安裝依賴包
yum install -y pcre pcre-devel yum install -y zlib zlib-devel yum install -y openssl openssl-devel
5.2、解壓
tar -zxvf nginx-1.14.1.tar.gz
5.3、進入安裝目錄
cd nginx-1.14.1
5.4、測試安裝環境，預設將安裝在/usr/local/nginx下
./configure
若configure未通過，則需要處理出現的異常，否則直接make && make install也是會出錯
5.5、編譯安裝
make && install
5.6、檢查是否安裝成功
http://192.168.3.12
若啟動正常，頁面不能訪問，則檢查是否防火牆未關閉或者80埠未允許訪問，關閉防火牆方法
systemctl stop firewalld
二、session共享和負載均衡配置
1、tocmat配置
1.1、在tomcat/conf/context.xml中增加RedissonSessionManager，tomcat1和tomcat2都要配置
<Manager className="org.redisson.tomcat.RedissonSessionManager" configPath="${catalina.base}/redisson.conf" readMode="MEMORY" updateMode="DEFAULT"/>
具體引數可參考：
https://github.com/redisson/redisson/blob/dfcf183fb99e2718a748148942926256f650ee24/redisson-tomcat/README.md
配置redisson
1.2、在tomcat安裝目錄下新建redisson.conf,新增如下配置
{ "singleServerConfig":{ "idleConnectionTimeout":10000, "pingTimeout":1000, "connectTimeout":10000, "timeout":3000, "retryAttempts":3, "retryInterval":1500, "password":null, "subscriptionsPerConnection":5, "clientName":null, "address": "redis://127.0.0.1:6379", "subscriptionConnectionMinimumIdleSize":1, "subscriptionConnectionPoolSize":50, "connectionMinimumIdleSize":32, "connectionPoolSize":64, "database":0, "dnsMonitoringInterval":5000 }, "threads":0, "nettyThreads":0, "codec":{ "class":"org.redisson.codec.JsonJacksonCodec" }, "transportMode":"NIO" }
本例中使用的為單例項redis，具體引數配置可參考：
https://github.com/redisson/redisson/wiki/2.-Configuration#26-single-instance-mode
redis叢集可參考如下連結中其他配置
https://github.com/redisson/redisson/wiki/2.-Configuration
1.3、拷貝jar包
https://github.com/redisson/redisson/tree/dfcf183fb99e2718a748148942926256f650ee24/redisson-tomcat下載redisson-all-3.9.1.jar和redisson-tomcat-9-3.9.1.jar，拷貝到${catalina.base}/lib下
分別啟動tomcat1和tomcat2，驗證是否可正常訪問
http://192.168.3.12:8081/mytest/index.jsp http://192.168.3.12:8082/mytest/index.jsp
1.4、nginx配置
修改nginx.conf配置
http節點中新增如下配置
upstream backend { server 127.0.0.1:8081 max_fails=1 fail_timeout=10s; server 127.0.0.1:8082 max_fails=1 fail_timeout=10s; }
location節點中增加proxy_pass項
location / { root html; index index.html index.htm; proxy_pass http://backend; }
三、測試
1、tomcat1/webapps/新建目錄mytest,mytest目錄下新建index.jsp，內容如下
<%@ page language="java" %> <html> <head><title>tomcat1</title></head> <body> <table align="centre" border="1"> <tr> <td>SessionID</td> <td><%= session.getId() %></td> </tr> <tr> <td>SessionCreatedTime</td> <td><%= session.getCreationTime() %></td> </tr> <tr> <td>ServerName</td> <td><%=request.getServerName()%></td> </tr> <tr> <td>SessionPort</td> <td><%=request.getServerPort()%></td> </tr> <tr> <td>CustomString</td> <td>This is the first tomcat</td> </tr> </table> </body> </html>
2、tomcat2/webapps/新建目錄mytest,mytest目錄下新建index.jsp，內容如下
<%@ page language="java" %> <html> <head><title>tomcat2</title></head> <body> <table align="centre" border="1"> <tr> <td>SessionID</td> <td><%= session.getId() %></td> </tr> <tr> <td>SessionCreatedTime</td> <td><%= session.getCreationTime() %></td> </tr> <tr> <td>ServerName</td> <td><%=request.getServerName()%></td> </tr> <tr> <td>SessionPort</td> <td><%=request.getServerPort()%></td> </tr> <tr> <td>CustomString</td> <td>This is the second tomcat</td> </tr> </table> </body> </html>
3、重新啟動redis，tomcat，nginx
4、輸入地址訪問
http://192.168.3.12/mytest/
5、結果
點選重新整理按鈕
可以發現，兩次訪問，SessionID都是相同的，並且title和自定義的字串不一樣，說明分別訪問了tomcat1和tomcat2
登陸redis
redis-cli
輸入以下命令可發現，session已經存放到了redis中，並且預設的超時時間為30 min
