Tomcat
tomcat简介
tomcat官网：http://tomcat.apache.org/php
Tomcat是Apache 软件基金会（Apache Software Foundation）的Jakarta 项目中的一个核心项目，由Apache、Sun 和其余一些公司及我的共同开发而成。因为有了Sun 的参与和支持，最新的Servlet 和JSP 规范老是能在Tomcat 中获得体现，Tomcat 5支持最新的Servlet 2.4 和JSP 2.0 规范。由于Tomcat 技术先进、性能稳定，并且免费，于是深受Java 爱好者的喜好并获得了部分软件开发商的承认，成为目前比较流行的Web 应用服务器。
Tomcat 服务器是一个免费的开放源代码的Web 应用服务器，属于轻量级应用服务器，在中小型系统和并发访问用户不是不少的场合下被广泛使用，是开发和调试JSP 程序的首选。对于一个初学者来讲，能够这样认为，当在一台机器上配置好Apache 服务器，可利用它响应HTML（标准通用标记语言下的一个应用）页面的访问请求。实际上Tomcat是Apache 服务器的扩展，但运行时它是独立运行的，因此当你运行tomcat 时，它实际上做为一个与Apache 独立的进程单独运行的。
诀窍是，当配置正确时，Apache 为HTML页面服务，而Tomcat 实际上运行JSP 页面和Servlet。另外，Tomcat和IIS等Web服务器同样，具备处理HTML页面的功能，另外它仍是一个Servlet和JSP容器，独立的Servlet容器是Tomcat的默认模式。不过，Tomcat处理静态HTML的能力不如Apache服务器。目前Tomcat最新版本为9.0.html
tomcat就是传说中的中间件之一，tomcat自己是一个容器，专门用来运行java程序，java语言开发的网页.jsp就应该运行于tomcat中。而tomcat自己的运行也依赖于jdk环境java
LNMT部署
tomcat安装部署
java安装环境mysql
[root@localhost ~]# yum -y install java-1.8.0-openjdk java-1.8.0-openjdk-devel 查看安装的版本 [root@localhost ~]# java -version openjdk version "1.8.0_201" OpenJDK Runtime Environment (build 1.8.0_201-b09) OpenJDK 64-Bit Server VM (build 25.201-b09, mixed mode)
tomcat安装部署nginx
[root@localhost ~]# cd /usr/src/
[root@localhost src]# ls
apache-tomcat-9.0.16.tar.gz kernels nginx-1.14.2.tar.gz
debug nginx-1.14.2
[root@localhost src]# tar xf apache-tomcat-9.0.16.tar.gz -C /usr/local/
[root@localhost src]# cd /usr/local/
[root@localhost local]# ls
apache-tomcat-9.0.16 etc include lib64 nginx share
bin games lib libexec sbin src
将解压的tomcat移到新建的目录里：
[root@localhost src]# cd /usr/local/
[root@localhost local]# ls
apache-tomcat-9.0.16 etc include lib64 nginx share
bin games lib libexec sbin src
[root@localhost local]# mkdir tomcat
[root@localhost local]# ls
apache-tomcat-9.0.16 etc include lib64 nginx share tomcat
bin games lib libexec sbin src
[root@localhost local]# mv apache-tomcat-9.0.16/ tomcat/tom
[root@localhost local]# cd tomcat/
[root@localhost tomcat]# ls
tom
[root@localhost tomcat]# ll tom/
总用量 124
drwxr-x---. 2 root root 4096 3月 7 14:44 bin
-rw-r-----. 1 root root 19203 2月 5 00:32 BUILDING.txt
drwx------. 2 root root 238 2月 5 00:32 conf
-rw-r-----. 1 root root 6095 2月 5 00:32 CONTRIBUTING.md
drwxr-x---. 2 root root 4096 3月 7 14:44 lib
-rw-r-----. 1 root root 57092 2月 5 00:32 LICENSE
drwxr-x---. 2 root root 6 2月 5 00:30 logs
-rw-r-----. 1 root root 2333 2月 5 00:32 NOTICE
-rw-r-----. 1 root root 3255 2月 5 00:32 README.md
-rw-r-----. 1 root root 6854 2月 5 00:32 RELEASE-NOTES
-rw-r-----. 1 root root 16262 2月 5 00:32 RUNNING.txt
drwxr-x---. 2 root root 30 3月 7 14:44 temp
drwxr-x---. 7 root root 81 2月 5 00:31 webapps
drwxr-x---. 3 root root 22 3月 7 14:44 work
建立多实例cat
[root@localhost tomcat]# cp -a tom/* cat/
[root@localhost tomcat]# ls
cat tom
[root@localhost tomcat]# cd cat/
[root@localhost cat]# ls
bin CONTRIBUTING.md logs RELEASE-NOTES webapps
BUILDING.txt lib NOTICE RUNNING.txt work
conf LICENSE README.md temp
写一个java页面：
[root@localhost ~]# vim index.jsp
[root@localhost ~]# cat index.jsp
<html>
<head>
<title>test page</title>
</head>
<body>
<%
out.println("Hellow World");
%>
</body>
</html>
将这个文件移到webapps下新建的目录里
[root@localhost ~]# ls
anaconda-ks.cfg index.jsp
[root@localhost ~]# cd /usr/local/tomcat/tom/webapps/
[root@localhost webapps]# mkdir gx
[root@localhost ~]# cp index.jsp /usr/local/tomcat/tom/webapps/gx/
[root@localhost ~]# cd /usr/local/tomcat/tom/webapps/gx/
[root@localhost gx]# ls
index.jsp
启动tomcat
[root@localhost ~]# /usr/local/tomcat/tom/bin/catalina.sh start
Using CATALINA_BASE: /usr/local/tomcat/tom
Using CATALINA_HOME: /usr/local/tomcat/tom
Using CATALINA_TMPDIR: /usr/local/tomcat/tom/temp
Using JRE_HOME: /usr
Using CLASSPATH: /usr/local/tomcat/tom/bin/bootstrap.jar:/usr/local/tomcat/tom/bin/tomcat-juli.jar
Tomcat started.
[root@localhost ~]# ss -antl
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 128 *:80 *:*
LISTEN 0 128 *:22 *:*
LISTEN 0 100 127.0.0.1:25 *:*
LISTEN 0 100 :::8080 :::*
LISTEN 0 128 :::22 :::*
LISTEN 0 100 ::1:25 :::*
LISTEN 0 1 ::ffff:127.0.0.1:8005 :::*
LISTEN 0 100 :::8009 :::*
点击红箭头添加管理界面：
修改配置文件web
[root@localhost ~]# cd /usr/local/tomcat/tom/
[root@localhost tom]# ls
bin CONTRIBUTING.md logs RELEASE-NOTES webapps
BUILDING.txt lib NOTICE RUNNING.txt work
conf LICENSE README.md temp
[root@localhost tom]# cd conf/
[root@localhost conf]# ls
Catalina jaspic-providers.xml tomcat-users.xml
catalina.policy jaspic-providers.xsd tomcat-users.xsd
catalina.properties logging.properties web.xml
context.xml server.xml
[root@localhost conf]# vim tomcat-users.xml
添加以下：
-->
<role rolename="manager-gui"/>
<role rolename="manager-script"/>
<role rolename="manager-status"/>
<role rolename="manager-jmx"/>
<user username="tomcat" password="tomcat" roles="manager-gui,manager-script,manager-status,manager-jmx"/>
</tomcat-users>
[root@localhost ~]# vim /usr/local/tomcat/tom/webapps/manager/META-INF/context.xml
添加192.168...：
allow="127\.\d+\.\d+\.\d+|::1|0:0:0:0:0:0:0:1|192\.168\.\d+\.\d" />
重启服务
[root@localhost ~]# /usr/local/tomcat/tom/bin/catalina.sh stop
[root@localhost ~]# /usr/local/tomcat/tom/bin/catalina.sh start
检测manager
修改端口sql
[root@localhost ~]# cd /usr/local/tomcat/cat/conf/
[root@localhost conf]# ls
Catalina jaspic-providers.xml tomcat-users.xml
catalina.policy jaspic-providers.xsd tomcat-users.xsd
catalina.properties logging.properties web.xml
context.xml server.xml
[root@localhost conf]# vim server.xml
<Server port="8015" shutdown="SHUTDOWN">
<Connector port="8081" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8445" />
<Connector port="8019" protocol="AJP/1.3" redirectPort="8445" />
重启服务
[root@localhost conf]# /usr/local/tomcat/cat/bin/catalina.sh stop
[root@localhost conf]# /usr/local/tomcat/cat/bin/catalina.sh start
[root@localhost conf]# ss -antl
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 128 *:22 *:*
LISTEN 0 100 127.0.0.1:25 *:*
LISTEN 0 1 ::ffff:127.0.0.1:8015 :::*
LISTEN 0 100 :::8080 :::*
LISTEN 0 100 :::8081 :::*
LISTEN 0 100 :::8019 :::*
LISTEN 0 128 :::22 :::*
LISTEN 0 100 ::1:25 :::*
LISTEN 0 1 ::ffff:127.0.0.1:8005 :::*
LISTEN 0 100 :::8009 :::*
建立Java页面
[root@localhost webapps]# mkdir hh
[root@localhost webapps]# cp -a gx/* hh/
[root@localhost webapps]# ls
docs examples gx hh host-manager manager ROOT
[root@localhost webapps]# rm -rf gx/
[root@localhost webapps]# ls
docs examples hh host-manager manager ROOT
[root@localhost webapps]# cd hh/
[root@localhost hh]# ls
index.jsp
[root@localhost hh]# cat
cat catchsegv catman
[root@localhost hh]# cat index.jsp
<html>
<head>
<title>test page</title>
</head>
<body>
<%
out.println("Hellow World");
%>
</body>
</html>
nginx安装
请看：https://mp.csdn.net/mdeditor/88032695#Nginx_733apache
mysql安装
请看：https://mp.csdn.net/mdeditor/87786704#mysql_112bootstrap
[root@localhost ~]# ss -antl State Recv-Q Send-Q Local Address:Port Peer Address:Port LISTEN 0 128 *:80 *:* LISTEN 0 128 *:22 *:* LISTEN 0 100 127.0.0.1:25 *:* LISTEN 0 1 ::ffff:127.0.0.1:8015 :::* LISTEN 0 100 :::8080 :::* LISTEN 0 100 :::8081 :::* LISTEN 0 100 :::8019 :::* LISTEN 0 128 :::22 :::* LISTEN 0 100 ::1:25 :::* LISTEN 0 1 ::ffff:127.0.0.1:8005 :::* LISTEN 0 100 :::8009 :::* LISTEN 0 80 :::3306 :::*
nginx轮询
将两个存放index.jsp目录名称改成同样
[root@localhost tom]# cd webapps/
[root@localhost webapps]# ls
docs examples gx host-manager manager ROOT
[root@localhost webapps]# mv gx hh
重启nginx和tomcat
[root@localhost ~]# vim /usr/local/nginx/conf/nginx.conf
#gzip on;
upstream gx.com {
server 192.168.72.31:8080;
server 192.168.72.31:8081;
}
server {
listen 80;
server_name www.gx.com;
#charset koi8-r;
#access_log logs/host.access.log main;
location / {
root html;
index index.jsp index.html index.htm;
proxy_pass http://gx.com;
}
#error_page 404 /404.html;
# redirect server error pages to the static page /50x.html
#
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root html;
}
# proxy the PHP scripts to Apache listening on 127.0.0.1:80
#
#location ~ \.php$ {
# proxy_pass http://127.0.0.1;
#}
location ~ \.jsp$ {
proxy_pass http://gx.com;
}