标签：efault rpo node nss profile events 拓扑图 min 重启nginx
1. 画出架构图；
2. 把配置文件发出来 (nginx.conf和server.xml)；
3. 要求实现session共享。
1. Tomcat自带的Cluster方式
2. 利用Memcached实现
2.1 Tomcat自带的Cluster方式实现session共享
2.1.1 实验拓扑图
2.1.2 基础环境
2.1.3 搭建部署
2.1.3.1 在web01上部署tomcat
第一个里程：检查java版本
[root@web01 ~]# java -version
java version "1.8.0_251"
Java(TM) SE Runtime Environment (build 1.8.0_251-b08)
Java HotSpot(TM) 64-Bit Server VM (build 25.251-b08, mixed mode)
第二个里程：安装tomcat8
[root@web01 ~]# cd /server/tools
[root@web01 tools]# wget https://mirrors.aliyun.com/apache/tomcat/tomcat-8/v8.5.56/bin/apache-tomcat-8.5.56.tar.gz
[root@web01 tools]# cd /application/
### tomcat1
[root@web01 application]# tar -zxvf /server/tools/apache-tomcat-8.5.56.tar.gz
[root@web01 application]# mv apache-tomcat-8.5.56 apache-tomcat-8.5.56_1
[root@web01 application]# ln -s /application/apache-tomcat-8.5.56_1 /application/tomcat1
### tomcat2
[root@web01 application]# tar -zxvf /server/tools/apache-tomcat-8.5.56.tar.gz
[root@web01 application]# mv apache-tomcat-8.5.56 apache-tomcat-8.5.56_2
[root@web01 application]# ln -s /application/apache-tomcat-8.5.56_2 /application/tomcat2
### tomcat3
[root@web01 application]# tar -zxvf /server/tools/apache-tomcat-8.5.56.tar.gz
[root@web01 application]# mv apache-tomcat-8.5.56 apache-tomcat-8.5.56_3
[root@web01 application]# ln -s /application/apache-tomcat-8.5.56_3 /application/tomcat3
第三个里程：为多个tomcat分配不同的端口号
tomcat1的端口我不变，其他几个依次修改如下。要有规律
tomcat1默认的8080端口如下（未作修改）
[root@web01 application]# vim /application/tomcat1/conf/server.xml
tomcat2的端口号修改如下。其他也依次修改。
[root@web01 application]# vim /application/tomcat2/conf/server.xml
Tomcat3的端口号修改如下。其他也依次修改。
[root@web01 application]# vim /application/tomcat3/conf/server.xml
第三个里程：编写一个测试页面(直接修改index.jsp文件)
##tomcat1的测试文件
[root@web01 application]# vim /application/tomcat1/webapps/ROOT/index.jsp
[root@web01 application]# cat /application/tomcat1/webapps/ROOT/index.jsp
<html>
<body bgcolor="green">
<center>
<%= request.getSession().getId() %>
<h1>10.0.0.7</h1>
<h1>port:8080</h1>
<h1>this is Tomcat-node1! </h1>
</center>
</body>
</html>
<%@ page contentType="text/html;charset=UTF-8" isELIgnored="false"%>
SessionID:<%=session.getId()%><BR>
SessionIP:<%=request.getServerName()%> <BR>
SessionPort:<%=request.getServerPort()%>
<% out.println("This is Tomcat server 10.0.0.7 port 8080!"); %>
##tomcat2的测试文件
[root@web01 application]# vim /application/tomcat2/webapps/ROOT/index.jsp
[root@web01 application]# cat /application/tomcat2/webapps/ROOT/index.jsp
<html>
<body bgcolor="green">
<center>
<%= request.getSession().getId() %>
<h1>10.0.0.7</h1>
<h1>port:8081</h1>
<h1>this is Tomcat-node1! </h1>
</center>
</body>
</html>
<%@ page contentType="text/html;charset=UTF-8" isELIgnored="false"%>
SessionID:<%=session.getId()%><BR>
SessionIP:<%=request.getServerName()%> <BR>
SessionPort:<%=request.getServerPort()%>
<% out.println("This is Tomcat server 10.0.0.7 port 8081!"); %>
##tomcat3的测试文件
[root@web01 application]# vim /application/tomcat3/webapps/ROOT/index.jsp
[root@web01 application]# cat /application/tomcat3/webapps/ROOT/index.jsp
<html>
<body bgcolor="green">
<center>
<%= request.getSession().getId() %>
<h1>10.0.0.7</h1>
<h1>port:8082</h1>
<h1>this is Tomcat-node1! </h1>
</center>
</body>
</html>
<%@ page contentType="text/html;charset=UTF-8" isELIgnored="false"%>
SessionID:<%=session.getId()%><BR>
SessionIP:<%=request.getServerName()%> <BR>
SessionPort:<%=request.getServerPort()%>
<% out.println("This is Tomcat server 10.0.0.7 port 8082!"); %>
第四个里程：启动tomcat
[root@web01 application]# /application/tomcat1/bin/startup.sh
Using CATALINA_BASE: /application/tomcat1
Using CATALINA_HOME: /application/tomcat1
Using CATALINA_TMPDIR: /application/tomcat1/temp
Using JRE_HOME: /application/jdk
Using CLASSPATH: /application/tomcat1/bin/bootstrap.jar:/application/tomcat1/bin/tomcat-juli.jar
Tomcat started.
[root@web01 application]# /application/tomcat2/bin/startup.sh
Using CATALINA_BASE: /application/tomcat2
Using CATALINA_HOME: /application/tomcat2
Using CATALINA_TMPDIR: /application/tomcat2/temp
Using JRE_HOME: /application/jdk
Using CLASSPATH: /application/tomcat2/bin/bootstrap.jar:/application/tomcat2/bin/tomcat-juli.jar
Tomcat started.
[root@web01 application]# /application/tomcat3/bin/startup.sh
Using CATALINA_BASE: /application/tomcat3
Using CATALINA_HOME: /application/tomcat3
Using CATALINA_TMPDIR: /application/tomcat3/temp
Using JRE_HOME: /application/jdk
Using CLASSPATH: /application/tomcat3/bin/bootstrap.jar:/application/tomcat3/bin/tomcat-juli.jar
Tomcat started.
##查看端口
[root@web01 application]# lsof -i:8080
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
java 9251 root 53u IPv6 45256 0t0 TCP *:webcache (LISTEN)
[root@web01 application]# lsof -i:8081
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
java 9272 root 53u IPv6 45271 0t0 TCP *:tproxy (LISTEN)
[root@web01 application]# lsof -i:8082
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
java 9297 root 53u IPv6 44422 0t0 TCP *:us-cli (LISTEN)
第五个里程：测试tomcat页面
Tomcat部署搭建完成！！！！
2.1.3.2 在lb01上部署nginx反向代理
第一个里程：安装nginx
1）软件依赖包的安装
[root@lb01 ~]# yum install -y pcre-devel openssl-devel
[root@lb01 ~]# rpm -qa pcre-devel openssl-devel
pcre-devel-8.32-17.el7.x86_64
openssl-devel-1.0.2k-19.el7.x86_64
2）创建一个管理Nginx进程的虚拟用户
[root@lb01 ~]# useradd www -s /sbin/nologin -M
[root@lb01 ~]# id www
uid=1001(www) gid=1001(www) groups=1001(www)
3）下载Nginx、上传到lb01server/tools目录并解压
[root@lb01 ~]# cd /server/tools/
[root@lb01 tools]# wget http://nginx.org/download/nginx-1.12.2.tar.gz
[root@lb01 tools]# tar zxf nginx-1.12.2.tar.gz
[root@lb01 tools]# ll
total 960
drwxr-xr-x 9 www www 186 May 31 17:18 nginx-1.12.2
-rw-r--r-- 1 root root 981687 Oct 17 2017 nginx-1.12.2.tar.gz
4）软件编译配置
[root@lb01 tools]# cd nginx-1.12.2/
[root@lb01 nginx-1.12.2]# ./configure --prefix=/application/nginx-1.12.2 --user=www --group=www --with-http_ssl_module --with-http_stub_status_module
[root@lb01 nginx-1.12.2]# echo $?
0
5）编译安装
[root@lb01 nginx-1.12.2]# make && make install
[root@lb01 nginx-1.12.2]# echo $?
0
6）创建链接目录，便于网站更新和维护
[root@lb01 nginx-1.12.2]# ln -s /application/nginx-1.12.2/ /application/nginx
[root@lb01 nginx-1.12.2]# ll /application/
total 0
lrwxrwxrwx 1 root root 26 May 31 17:21 nginx -> /application/nginx-1.12.2/
drwxr-xr-x 6 root root 54 May 31 17:20 nginx-1.12.2
7）启动Nginx服务
[root@lb01 nginx-1.12.2]# /application/nginx/sbin/nginx
[root@lb01 nginx-1.12.2]# ps -ef|grep nginx
root 9077 1 0 17:22 ? 00:00:00 nginx: master process /application/nginx/sbin/nginx
www 9078 9077 0 17:22 ? 00:00:00 nginx: worker process
root 9080 6428 0 17:22 pts/0 00:00:00 grep --color=auto nginx
[root@lb01 nginx-1.12.2]# lsof -i:80
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
nginx 9077 root 6u IPv4 37343 0t0 TCP *:http (LISTEN)
nginx 9078 www 6u IPv4 37343 0t0 TCP *:http (LISTEN)
第二个里程：修改nginx配置文件
[root@lb01 ~]# vim /application/nginx/conf/nginx.conf
[root@lb01 ~]# cat /application/nginx/conf/nginx.conf
worker_processes 1;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
sendfile on;
keepalive_timeout 65;
upstream test {
server 10.0.0.7:8080;
server 10.0.0.7:8081;
server 10.0.0.7:8082;
}
server {
listen 80;
server_name www.test.org;
root html;
index index.html index.htm;
location / {
proxy_pass http://test;
proxy_set_header Host $host;
}
}
}
第三个里程：重启nginx
[root@lb01 ~]# /application/nginx/sbin/nginx -t
nginx: the configuration file /application/nginx-1.12.2/conf/nginx.conf syntax is ok
nginx: configuration file /application/nginx-1.12.2/conf/nginx.conf test is successful
[root@lb01 ~]# /application/nginx/sbin/nginx -s stop
[root@lb01 ~]# /application/nginx/sbin/nginx
[root@lb01 ~]# lsof -i:80
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
nginx 6903 root 6u IPv4 40361 0t0 TCP *:http (LISTEN)
nginx 6904 www 6u IPv4 40361 0t0 TCP *:http (LISTEN)
第四个里程：测试
注：访问http://10.0.0.5的请求会轮询负载到tomcat-node1节点上不同的端口上,并且session id会随着页面的刷新而改变,即此时还没有实现session会话共享!!
2.1.3.3 在web01上修改tomcat的配置文件，实现session会话共享
第一个里程：修改server.xml文件
[root@web01 ~]# vim /application/tomcat1/conf/server.xml
# 去掉Cluster这行的注释
第二个里程：修改web.xml文件
[root@web01 ~]# vim /application/tomcat1/webapps/ROOT/WEB-INF/web.xml
#添加<distributable/>
同理在tomcat2和tomcat3上做相同的操作，修改server.xml文件和web.xml文件
第三个里程：重启tomcat
##查看tomcat进程
[root@web01 ~]# ps -ef |grep tomcat
root 9251 1 1 16:42 ? 00:00:24 /application/jdk/bin/java -Djava.util.logging.config.file=/application/tomcat1/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djdk.tls.ephemeralDHKeySize=2048 -Djava.protocol.handler.pkgs=org.apache.catalina.webresources -Dorg.apache.catalina.security.SecurityListener.UMASK=0027 -Dignore.endorsed.dirs= -classpath /application/tomcat1/bin/bootstrap.jar:/application/tomcat1/bin/tomcat-juli.jar -Dcatalina.base=/application/tomcat1 -Dcatalina.home=/application/tomcat1 -Djava.io.tmpdir=/application/tomcat1/temp org.apache.catalina.startup.Bootstrap start
root 9272 1 1 16:42 ? 00:00:24 /application/jdk/bin/java -Djava.util.logging.config.file=/application/tomcat2/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djdk.tls.ephemeralDHKeySize=2048 -Djava.protocol.handler.pkgs=org.apache.catalina.webresources -Dorg.apache.catalina.security.SecurityListener.UMASK=0027 -Dignore.endorsed.dirs= -classpath /application/tomcat2/bin/bootstrap.jar:/application/tomcat2/bin/tomcat-juli.jar -Dcatalina.base=/application/tomcat2 -Dcatalina.home=/application/tomcat2 -Djava.io.tmpdir=/application/tomcat2/temp org.apache.catalina.startup.Bootstrap start
root 9297 1 2 16:42 ? 00:00:29 /application/jdk/bin/java -Djava.util.logging.config.file=/application/tomcat3/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djdk.tls.ephemeralDHKeySize=2048 -Djava.protocol.handler.pkgs=org.apache.catalina.webresources -Dorg.apache.catalina.security.SecurityListener.UMASK=0027 -Dignore.endorsed.dirs= -classpath /application/tomcat3/bin/bootstrap.jar:/application/tomcat3/bin/tomcat-juli.jar -Dcatalina.base=/application/tomcat3 -Dcatalina.home=/application/tomcat3 -Djava.io.tmpdir=/application/tomcat3/temp org.apache.catalina.startup.Bootstrap start
root 9481 9395 0 17:03 pts/1 00:00:00 grep --color=auto tomcat
##杀掉tomcat进程
[root@web01 ~]# kill -9 9251
[root@web01 ~]# kill -9 9272
[root@web01 ~]# kill -9 9297
[root@web01 ~]# ps -ef |grep tomcat
root 9485 9395 0 17:03 pts/1 00:00:00 grep --color=auto tomcat
##启动tomcat
[root@web01 ~]# /application/tomcat1/bin/startup.sh
Using CATALINA_BASE: /application/tomcat1
Using CATALINA_HOME: /application/tomcat1
Using CATALINA_TMPDIR: /application/tomcat1/temp
Using JRE_HOME: /application/jdk
Using CLASSPATH: /application/tomcat1/bin/bootstrap.jar:/application/tomcat1/bin/tomcat-juli.jar
Tomcat started.
[root@web01 ~]# /application/tomcat2/bin/startup.sh
Using CATALINA_BASE: /application/tomcat2
Using CATALINA_HOME: /application/tomcat2
Using CATALINA_TMPDIR: /application/tomcat2/temp
Using JRE_HOME: /application/jdk
Using CLASSPATH: /application/tomcat2/bin/bootstrap.jar:/application/tomcat2/bin/tomcat-juli.jar
Tomcat started.
[root@web01 ~]# /application/tomcat3/bin/startup.sh
Using CATALINA_BASE: /application/tomcat3
Using CATALINA_HOME: /application/tomcat3
Using CATALINA_TMPDIR: /application/tomcat3/temp
Using JRE_HOME: /application/jdk
Using CLASSPATH: /application/tomcat3/bin/bootstrap.jar:/application/tomcat3/bin/tomcat-juli.jar
Tomcat started.
##查看端口
[root@web01 ~]# lsof -i:8080
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
java 9495 root 53u IPv6 45973 0t0 TCP *:webcache (LISTEN)
[root@web01 ~]# lsof -i:8081
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
java 9539 root 53u IPv6 44996 0t0 TCP *:tproxy (LISTEN)
[root@web01 ~]# lsof -i:8082
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
java 9594 root 53u IPv6 46022 0t0 TCP *:us-cli (LISTEN)
第四个里程：测试tomcat的session会话共享
访问http://10.0.0.5,按ctrl+F5强刷页面,发现session信息会变,但是sessionid不会改变!说明session实现了共享。
2.2 利用Memcached实现
2.2.1 实验拓扑图
2.2.2 基础环境
2.2.3 搭建部署
2.2.3.1 在web01、web02和web03上部署tomcat
第一个里程：安装jdk 并检查java版本
[root@web01 application]# cd /server/tools/
#编写安装脚本
[root@web01 scripts]# vim install_jdk.sh
[root@web01 scripts]# cat install_jdk.sh
#!/bin/bash
cd /server/tools
tar -zxvf jdk-8u251-linux-x64.tar.gz
mv jdk1.8.0_251 /application/
ln -s /application/jdk1.8.0_251 /application/jdk
cat >>/etc/profile <<‘EOF‘
export JAVA_HOME=/application/jdk
export PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH
export CLASSPATH=.:$JAVA_HOME/lib:$JAVA_HOME/jre/lib/tools.jar
EOF
source /etc/profile
java -version
status=`echo $?`
if [ $status -eq 0 ]
then
echo "install jdk is successful"
fi
#测试脚本
[root@web01 scripts]# chmod +x install_jdk.sh
[root@web01 scripts]# bash install_jdk.sh
[root@web01 scripts]# source /etc/profile
#查看java版本
[root@web01 scripts]# java -version
java version "1.8.0_251"
Java(TM) SE Runtime Environment (build 1.8.0_251-b08)
Java HotSpot(TM) 64-Bit Server VM (build 25.251-b08, mixed mode)
第二个里程：安装tomcat8
[root@web01 ~]# cd /server/scripts/
#编写安装脚本
[root@web01 scripts]# vim install_tomcat.sh
[root@web01scripts]# cat install_tomcat.sh
#!/bin/bash
cd /server/tools
wget https://mirrors.aliyun.com/apache/tomcat/tomcat-8/v8.5.56/bin/apache-tomcat-8.5.56.tar.gz
tar -zxvf apache-tomcat-8.5.56.tar.gz
mv apache-tomcat-8.5.56 /application/
ln -s /application/apache-tomcat-8.5.56 /application/tomcat
/application/tomcat/bin/startup.sh
num=`ps -ef |grep tomcat|wc -l`
if [ $num -eq 2 ]
then
echo "tomcat is running"
fi
#测试脚本
[root@web01 scripts]# bash install_tomcat.sh
[root@web01 scripts]# ps -ef |grep tomcat
root 11683 1 4 20:33 pts/0 00:00:01 /application/jdk/bin/java -Djava.util.logging.config.file=/application/tomcat/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djdk.tls.ephemeralDHKeySize=2048 -Djava.protocol.handler.pkgs=org.apache.catalina.webresources -Dorg.apache.catalina.security.SecurityListener.UMASK=0027 -Dignore.endorsed.dirs= -classpath /application/tomcat/bin/bootstrap.jar:/application/tomcat/bin/tomcat-juli.jar -Dcatalina.base=/application/tomcat -Dcatalina.home=/application/tomcat -Djava.io.tmpdir=/application/tomcat/temp org.apache.catalina.startup.Bootstrap start
root 11720 1571 0 20:34 pts/0 00:00:00 grep --color=auto tomcat
同理将install_jdk.sh脚本和install_tomcat.sh脚本上传到web02和web03上分别执行安装。
第三里程：编写测试页面
#web01上
[root@web01 scripts]# cat > /application/tomcat/webapps/ROOT/index.jsp <<EOF
> <html>
> <body bgcolor="green">
> <center>
> <%= request.getSession().getId() %>
> <h1>192.168.0.144</h1>
> <h1>port:8080</h1>
> <h1>this is Tomcat-node1! </h1>
> </center>
> </body>
> </html>
>
> <%@ page contentType="text/html;charset=UTF-8" isELIgnored="false"%>
> SessionID:<%=session.getId()%><BR>
> SessionIP:<%=request.getServerName()%> <BR>
> SessionPort:<%=request.getServerPort()%>
> <% out.println("This is Tomcat server 192.168.0.144 port 8080!"); %>
> EOF
#web02上
[root@web02 scripts]# cat > /application/tomcat/webapps/ROOT/index.jsp <<EOF
> <html>
> <body bgcolor="green">
> <center>
> <%= request.getSession().getId() %>
> <h1>192.168.0.121</h1>
> <h1>port:8080</h1>
> <h1>this is Tomcat-node2! </h1>
> </center>
> </body>
> </html>
>
> <%@ page contentType="text/html;charset=UTF-8" isELIgnored="false"%>
> SessionID:<%=session.getId()%><BR>
> SessionIP:<%=request.getServerName()%> <BR>
> SessionPort:<%=request.getServerPort()%>
> <% out.println("This is Tomcat server 192.168.0.121 port 8080!"); %>
> EOF
#web03上
[root@web03 scripts]# cat > /application/tomcat/webapps/ROOT/index.jsp <<EOF
> <html>
> <body bgcolor="green">
> <center>
> <%= request.getSession().getId() %>
> <h1>192.168.0.147</h1>
> <h1>port:8080</h1>
> <h1>this is Tomcat-node3! </h1>
> </center>
> </body>
> </html>
>
> <%@ page contentType="text/html;charset=UTF-8" isELIgnored="false"%>
> SessionID:<%=session.getId()%><BR>
> SessionIP:<%=request.getServerName()%> <BR>
> SessionPort:<%=request.getServerPort()%>
> <% out.println("This is Tomcat server 192.168.0.147 port 8080!"); %>
> EOF
第四里程：测试tomcat（命令行测试）
#web01
[root@web01 scripts]# curl 192.168.0.144:8080
<html>
<body bgcolor="green">
<center>
D9439A53D1A5F9C7938B9CD59FD4215E
<h1>192.168.0.144</h1>
<h1>port:8080</h1>
<h1>this is Tomcat-node1! </h1>
</center>
</body>
</html>
SessionID:D9439A53D1A5F9C7938B9CD59FD4215E<BR>
SessionIP:192.168.0.144 <BR>
SessionPort:8080
This is Tomcat server 192.168.0.144 port 8080!
#web02
[root@web02 scripts]# curl 192.168.0.121:8080
<html>
<body bgcolor="green">
<center>
0091BA81E677695069FAB4BEA57EBBDC
<h1>192.168.0.121</h1>
<h1>port:8080</h1>
<h1>this is Tomcat-node2! </h1>
</center>
</body>
</html>
SessionID:0091BA81E677695069FAB4BEA57EBBDC<BR>
SessionIP:192.168.0.121 <BR>
SessionPort:8080
This is Tomcat server 192.168.0.121 port 8080!
#web03
[root@web03 scripts]# curl 192.168.0.147:8080
<html>
<body bgcolor="green">
<center>
7EB5ABA822853AD8CD418C8F442AA0D5
<h1>192.168.0.147</h1>
<h1>port:8080</h1>
<h1>this is Tomcat-node3! </h1>
</center>
</body>
</html>
SessionID:7EB5ABA822853AD8CD418C8F442AA0D5<BR>
SessionIP:192.168.0.147 <BR>
SessionPort:8080
This is Tomcat server 192.168.0.147 port 8080!
##Tomcat部署完成
2.2.3.2在lb01上部署nginx反向代理
第一个里程：安装nginx（略过，如上操作）
第二个里程：修改nginx配置文件
[root@lb01 ~]# vim /application/nginx/conf/nginx.conf
[root@lb01 ~]# cat /application/nginx/conf/nginx.conf
worker_processes 1;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
sendfile on;
keepalive_timeout 65;
upstream test {
server 192.168.0.144:8080;
server 192.168.0.121:8080;
server 192.168.0.147:8080;
}
server {
listen 80;
server_name www.test.org;
root html;
index index.html index.htm;
location / {
proxy_pass http://test;
proxy_set_header Host $host;
}
}
}
#检查语法
[root@lb01 ~]# /application/nginx/sbin/nginx -t
nginx: the configuration file /application/nginx-1.14.0/conf/nginx.conf syntax is ok
nginx: configuration file /application/nginx-1.14.0/conf/nginx.conf test is successful
第三个里程：重启nginx
[root@lb01 ~]# /application/nginx/sbin/nginx -s stop
[root@lb01 ~]# /application/nginx/sbin/nginx
[root@lb01 ~]# ps -ef |grep nginx
root 23645 1 0 20:50 ? 00:00:00 nginx: master process /application/nginx/sbin/nginx
www 23646 23645 0 20:50 ? 00:00:00 nginx: worker process
root 23648 23454 0 20:50 pts/1 00:00:00 grep --color=auto nginx
[root@lb01 ~]# lsof -i:80
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
nginx 23645 root 6u IPv4 53739 0t0 TCP *:http (LISTEN)
nginx 23646 www 6u IPv4 53739 0t0 TCP *:http (LISTEN)
第四个里程：测试nginx转发tomcat（命令行测试）
[root@lb01 ~]# curl -H host:www.test.org 192.168.0.69
<html>
<body bgcolor="green">
<center>
215269E44114C0C1AFFD74984DDFBF59
<h1>192.168.0.144</h1>
<h1>port:8080</h1>
<h1>this is Tomcat-node1! </h1>
</center>
</body>
</html>
SessionID:215269E44114C0C1AFFD74984DDFBF59<BR>
SessionIP:www.test.org <BR>
SessionPort:80
This is Tomcat server 192.168.0.144 port 8080!
[root@lb01 ~]# curl -H host:www.test.org 192.168.0.69
<html>
<body bgcolor="green">
<center>
550C55EF55A9D171B78E8CE5644B7891
<h1>192.168.0.121</h1>
<h1>port:8080</h1>
<h1>this is Tomcat-node2! </h1>
</center>
</body>
</html>
SessionID:550C55EF55A9D171B78E8CE5644B7891<BR>
SessionIP:www.test.org <BR>
SessionPort:80
This is Tomcat server 192.168.0.121 port 8080!
[root@lb01 ~]# curl -H host:www.test.org 192.168.0.69
<html>
<body bgcolor="green">
<center>
0AEE894ABC9F1616CA011FB2474A75BE
<h1>192.168.0.147</h1>
<h1>port:8080</h1>
<h1>this is Tomcat-node3! </h1>
</center>
</body>
</html>
SessionID:0AEE894ABC9F1616CA011FB2474A75BE<BR>
SessionIP:www.test.org <BR>
SessionPort:80
This is Tomcat server 192.168.0.147 port 8080!
##测试可以访问tomcat页面，但是session id一直在变化，没有实现session共享
2.2.3.3 在cache01和cache02上部署memcached
Memcached是一款免费、开源、分布式的内存对象缓存系统, 用于减少数据库的负载, 加快web应用程序的访问. Memcached简单并且强大, 其简单的设计加快了部署, 易于开发, 缓存解决了面临的大量数据时很多的问题。
第一个里程：安装memcached
[root@cache01 ~]# yum install Memcached -y
[root@cache01 ~]# rpm -qa |grep memcached
memcached-1.4.15-10.el7_3.1.x86_64
第二个里程：启动memcached
[root@cache01 ~]# systemctl start memcached
[root@cache01 ~]# systemctl status memcached
● memcached.service - Memcached
Loaded: loaded (/usr/lib/systemd/system/memcached.service; disabled; vendor preset: disabled)
Active: active (running) since Sat 2020-06-13 17:43:20 CST; 5s ago
Main PID: 23257 (memcached)
CGroup: /system.slice/memcached.service
└─23257 /usr/bin/memcached -u memcached -p 11211 -m 64 -c 1024
Jun 13 17:43:20 cache01 systemd[1]: Started Memcached.
[root@cache01 ~]# ps -ef |grep memcached
memcach+ 23257 1 0 17:43 ? 00:00:00 /usr/bin/memcached -u memcached -p 11211 -m 64 -c 1024
root 23289 22303 0 17:43 pts/0 00:00:00 grep --color=auto memcached
[root@cache01 ~]# lsof -i:11211
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
memcached 23257 memcached 26u IPv4 120484 0t0 TCP *:memcache (LISTEN)
memcached 23257 memcached 27u IPv6 120485 0t0 TCP *:memcache (LISTEN)
memcached 23257 memcached 28u IPv4 120488 0t0 UDP *:memcache
memcached 23257 memcached 29u IPv6 120489 0t0 UDP *:memcache
第三个里程：测试memcached连接
[root@cache01 ~]# telnet 172.16.1.61 11211
Trying 172.16.1.61...
Connected to 172.16.1.61.
Escape character is ‘^]‘.
set data01 0 0 10
memcached1
STORED
^C^]
telnet> quit
[root@cache01 ~]# printf "set data02 0 0 10\r\nmemcached1\r\n" |nc 172.16.1.61 11211
STORED
同理在cache02上做相同的操作
2.2.3.4 配置Tomcat，通过MSM实现共享session（web01、web02和web03机器上操作）
MSM(memcached session manager), MSM是一款实现Tomcat会话保持的管理组件, 支持粘性和无粘性的配置, 目前可以在Tomcat6,7,8中使用, 并且支持Memcached会话故障转移。
第一个里程：下载MSM的类库文件
[root@web01 ~]# mkdir /server/tools/MSM_Tools
[root@web01 ~]# cd /server/tools/MSM_Tools/
[root@web01 MSM_Tools]# wget https://repo1.maven.org/maven2/de/javakaffee/msm/memcached-session-manager-tc8/1.9.7/memcached-session-manager-tc8-1.9.7.jar
[root@web01 MSM_Tools]# wget https://repo1.maven.org/maven2/net/spy/spymemcached/2.12.2/spymemcached-2.12.2.jar
[root@web01 MSM_Tools]# wget https://repo1.maven.org/maven2/de/javakaffee/msm/msm-kryo-serializer/1.9.7/msm-kryo-serializer-1.9.7.jar
[root@web01 MSM_Tools]# wget https://repo1.maven.org/maven2/de/javakaffee/kryo-serializers/0.38/kryo-serializers-0.38.jar
[root@web01 MSM_Tools]# wget https://repo1.maven.org/maven2/com/esotericsoftware/kryo/4.0.0/kryo-4.0.0.jar
[root@web01 MSM_Tools]# wget https://repo1.maven.org/maven2/com/esotericsoftware/minlog/1.3.0/minlog-1.3.0.jar
[root@web01 MSM_Tools]# wget https://repo1.maven.org/maven2/com/esotericsoftware/reflectasm/1.11.3/reflectasm-1.11.3.jar
[root@web01 MSM_Tools]# wget https://repo1.maven.org/maven2/org/ow2/asm/asm/5.2/asm-5.2.jar
[root@web01 MSM_Tools]# wget https://repo1.maven.org/maven2/org/objenesis/objenesis/2.4/objenesis-2.4.jar
[root@web01 MSM_Tools]# wget https://repo1.maven.org/maven2/de/javakaffee/msm/memcached-session-manager/1.9.7/memcached-session-manager-1.9.7.jar
[root@web01 MSM_Tools]# ll
total 1212
-rw-r--r-- 1 root root 53259 Dec 23 2016 asm-5.2.jar
-rw-r--r-- 1 root root 323740 Jul 6 2016 kryo-4.0.0.jar
-rw-r--r-- 1 root root 85217 May 26 2016 kryo-serializers-0.38.jar
-rw-r--r-- 1 root root 152401 Aug 5 2016 memcached-session-manager-1.9.7.jar
-rw-r--r-- 1 root root 10788 Aug 5 2016 memcached-session-manager-tc8-1.9.7.jar
-rw-r--r-- 1 root root 5711 Jul 21 2014 minlog-1.3.0.jar
-rw-r--r-- 1 root root 37160 Aug 5 2016 msm-kryo-serializer-1.9.7.jar
-rw-r--r-- 1 root root 51287 May 23 2016 objenesis-2.4.jar
-rw-r--r-- 1 root root 20883 May 9 2016 reflectasm-1.11.3.jar
-rw-r--r-- 1 root root 472838 Feb 1 2017 spymemcached-2.12.2.jar
第二个里程：把上面这些MSM依赖的jar包下载后全部上传到两台机器的/application/tomcat1/lib/ 目录下
[root@web01 MSM_Tools]# cp * /application/tomcat/lib/
第三个里程：修改context.xml文件
[root@web01 tools]# vim /application/tomcat/conf/context.xml
（注：详情请参考：https://github.com/magro/memcached-session-manager/wiki/SetupAndConfiguration#example-for-non-sticky-sessions--kryo）
第四个里程：重启tomcat
#查看tomcat进程
[root@web01 tools]# ps -ef |grep tomcat
root 11683 1 0 20:33 pts/0 00:00:04 /application/jdk/bin/java -Djava.util.logging.config.file=/application/tomcat/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djdk.tls.ephemeralDHKeySize=2048 -Djava.protocol.handler.pkgs=org.apache.catalina.webresources -Dorg.apache.catalina.security.SecurityListener.UMASK=0027 -Dignore.endorsed.dirs= -classpath /application/tomcat/bin/bootstrap.jar:/application/tomcat/bin/tomcat-juli.jar -Dcatalina.base=/application/tomcat -Dcatalina.home=/application/tomcat -Djava.io.tmpdir=/application/tomcat/temp org.apache.catalina.startup.Bootstrap start
root 11909 1571 0 21:22 pts/0 00:00:00 grep --color=auto tomcat
#杀掉tomcat进程
[root@web01 tools]# kill -9 11683
[root@web01 tools]# ps -ef |grep tomcat
root 11911 1571 0 21:22 pts/0 00:00:00 grep --color=auto tomcat
#启动tomcat
[root@web01 tools]# /application/tomcat/bin/startup.sh
Using CATALINA_BASE: /application/tomcat
Using CATALINA_HOME: /application/tomcat
Using CATALINA_TMPDIR: /application/tomcat/temp
Using JRE_HOME: /application/jdk
Using CLASSPATH: /application/tomcat/bin/bootstrap.jar:/application/tomcat/bin/tomcat-juli.jar
Tomcat started.
[root@web01 tools]# ps -ef |grep tomcat
root 11920 1 87 21:22 pts/0 00:00:02 /application/jdk/bin/java -Djava.util.logging.config.file=/application/tomcat/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djdk.tls.ephemeralDHKeySize=2048 -Djava.protocol.handler.pkgs=org.apache.catalina.webresources -Dorg.apache.catalina.security.SecurityListener.UMASK=0027 -Dignore.endorsed.dirs= -classpath /application/tomcat/bin/bootstrap.jar:/application/tomcat/bin/tomcat-juli.jar -Dcatalina.base=/application/tomcat -Dcatalina.home=/application/tomcat -Djava.io.tmpdir=/application/tomcat/temp org.apache.catalina.startup.Bootstrap start
root 11956 1571 0 21:22 pts/0 00:00:00 grep --color=auto tomcat
[root@web01 tools]# lsof -i:8080
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
java 11920 root 62u IPv6 29324 0t0 TCP *:webcache (LISTEN)
web01部署好之后，web02 和web03也需要相同的操作
第五个里程：测试
1）访问http://www.test.org,按ctrl+F5强刷页面,发现session信息会变,但是sessionid不会改变!说明session实现了共享! 开启两个Memcached，三个Tomcat。
2）Session初始在n1，关闭Mem-node1节点的memcached服务,继续访问页面,发现sessionid保存到了n2这个memcached节点上了,但是sessionid任然没有改变,说明session已共享. 也就是说,关闭memcached集群中的任意一个节点.访问页面,sessionid都不会改变.即可以实现memcached故障转移。
关闭n1的memcached服务，查看结果
[root@cache01 ~]# systemctl stop memcached
[root@cache01 ~]# systemctl status memcached
● memcached.service - Memcached
Loaded: loaded (/usr/lib/systemd/system/memcached.service; disabled; vendor preset: disabled)
Active: inactive (dead)
Jun 13 21:08:34 cache02 systemd[1]: Started Memcached.
Jun 13 22:01:28 cache02 systemd[1]: Stopping Memcached...
Jun 13 22:01:28 cache02 systemd[1]: Stopped Memcached.
3）关闭tomcat-node1、tomcat-node2和tomcat-node3中的任意一个节点的tomcat服务,继续访问页面,发现前端从nginx负载过来的请求达到未关闭的tomcat节点上,session id都不会改变,任然在共享中!即可以实现tomcat故障转移。
关闭tomcat-node1,查看结果
[root@web01 tools]# ps -ef |grep tomcat
root 12137 1 0 22:09 pts/0 00:00:04 /application/jdk/bin/java -Djava.util.logging.config.file=/application/tomcat/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djdk.tls.ephemeralDHKeySize=2048 -Djava.protocol.handler.pkgs=org.apache.catalina.webresources -Dorg.apache.catalina.security.SecurityListener.UMASK=0027 -Dignore.endorsed.dirs= -classpath /application/tomcat/bin/bootstrap.jar:/application/tomcat/bin/tomcat-juli.jar -Dcatalina.base=/application/tomcat -Dcatalina.home=/application/tomcat -Djava.io.tmpdir=/application/tomcat/temp org.apache.catalina.startup.Bootstrap start
root 12205 1571 0 22:18 pts/0 00:00:00 grep --color=auto tomcat
[root@web01 tools]# kill -9 12137
[root@web01 tools]# lsof -i:8080
关闭tomcat-node1和tomcat-node2,查看结果
[root@web02 MSM_Tools]# ps -ef |grep tomcat
root 12182 1 0 22:08 pts/0 00:00:05 /application/jdk/bin/java -Djava.util.logging.config.file=/application/tomcat/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djdk.tls.ephemeralDHKeySize=2048 -Djava.protocol.handler.pkgs=org.apache.catalina.webresources -Dorg.apache.catalina.security.SecurityListener.UMASK=0027 -Dignore.endorsed.dirs= -classpath /application/tomcat/bin/bootstrap.jar:/application/tomcat/bin/tomcat-juli.jar -Dcatalina.base=/application/tomcat -Dcatalina.home=/application/tomcat -Djava.io.tmpdir=/application/tomcat/temp org.apache.catalina.startup.Bootstrap start
root 12250 1571 0 22:23 pts/0 00:00:00 grep --color=auto tomcat
[root@web02 MSM_Tools]# kill -9 12182
[root@web02 MSM_Tools]# lsof -i:8080
[root@web02 MSM_Tools]#
标签：efault rpo node nss profile events 拓扑图 min 重启nginx
原文地址：https://www.cnblogs.com/jiawei2527/p/13127408.html
