# Redis 직접설치
sudo apt-get install redis-server
redis-server --version
sudo systemctl restart redis-server.service
netstat -nlpt | grep 6379
redis-cli
set [key] [value]# Redis 도커설치
docker pull redis
docker network create redis-net
docker run --name myredis -p 6379:6379 --network redis-net -d redis redis-server --appendonly yes
docker run -it --network redis-net --rm redis redis-cli -h myredis
# Tomcat 서버에 Redis Session Manager 다운로드 및 tomcat 설정 변경
sudo wget https://github.com/ran-jit/tomcat-cluster-redis-session-manager/releases/download/2.0.4/tomcat-cluster-redis-session-manager.zip
(sudo apt install unzip)
sudo unzip tomcat-cluster-redis-session-manager.zip
sudo cp ./tomcat-cluster-redis-session-manager/lib/* /usr/local/tomcat9/lib/
sudo cp ./tomcat-cluster-redis-session-manager/conf/* /usr/local/tomcat9/conf/
sudo chown -R ubuntu: tomcat1
# redis-data-cache.properties 수정
vi /usr/local/tomcat9/conf/redis-data-cache.properties
redis.hosts=127.0.0.1:6379 ## redis endpoint 추가
# web.xml 수정
vi /usr/local/tomcat9/conf/web.xml
<session-config>
<session-timeout>60</session-timeout> <!-- 60 으로 변경 -->
</session-config>
# context.xml 수정
vi /usr/local/tomcat9/conf/context.xml
<Context>
...
<!-- 아래 내용 추가 -->
<Valve className="tomcat.request.session.redis.SessionHandlerValve" />
<Manager className="tomcat.request.session.redis.SessionManager" />
...
</Context>
# 다른 톰켓서버를 내려도 세션 ID는 유지
<%@ page language="java" contentType="text/html; charset=EUC-KR"
pageEncoding="EUC-KR"%>
<%@ page import="java.text.*"%>
<%@ page import="java.util.*"%>
<%
String RsessionId = request.getRequestedSessionId();
String sessionId = session.getId();
boolean isNew = session.isNew();
long creationTime = session.getCreationTime();
long lastAccessedTime = session.getLastAccessedTime();
int maxInactiveInterval = session.getMaxInactiveInterval();
Enumeration e = session.getAttributeNames();
%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=EUC-KR">
<title>Session Test</title>
</head>
<body>
<table border=1 bordercolor="gray" cellspacing=1 cellpadding=0
width="100%">
<tr bgcolor="gray">
<td colspan=2 align="center"><font color="white"><b>Session
Info</b></font></td>
</tr>
<tr>
<td>Server HostName</td>
<td><%=java.net.InetAddress.getLocalHost().getHostName()%></td>
</tr>
<tr>
<td>Server IP</td>
<td><%=java.net.InetAddress.getLocalHost()
.getHostAddress()%></td>
</tr>
<tr>
<td>Request SessionID</td>
<td><%=RsessionId%></td>
</tr>
<tr>
<td>SessionID</td>
<td><%=sessionId%></td>
</tr>
<tr>
<td>isNew</td>
<td><%=isNew%></td>
</tr>
<tr>
<td>Creation Time</td>
<td><%=new Date(creationTime)%></td>
</tr>
<tr>
<td>Last Accessed Time</td>
<td><%=new Date(lastAccessedTime)%></td>
</tr>
<tr>
<td>Max Inactive Interval (second)</td>
<td><%=maxInactiveInterval%></td>
</tr>
<tr bgcolor="cyan">
<td colspan=2 align="center"><b>Session Value List</b></td>
</tr>
<tr>
<td align="center">NAME</td>
<td align="center">VAULE</td>
</tr>
<%
String name = null;
while (e.hasMoreElements()) {
name = (String) e.nextElement();
%>
<tr>
<td align="left"><%=name%></td>
<td align="left"><%=session.getAttribute(name)%></td>
</tr>
<%
}
%>
</table>
<%
int count = 0;
if(session.getAttribute("count") != null)
count = (Integer) session.getAttribute("count");
count += 1;
session.setAttribute("count", count);
out.println(session.getId() + " : " + count);
%>
</body>
</html>
[참고]
https://cleanupthedesk.tistory.com/42
https://hongddo.tistory.com/89
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