tomcat
tomcat
tomcat简介
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很多的场合下被普遍使用，是开发和调试JSP 程序的首选。对于一个初学者来说，可以这样认为，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，所以当你运行tomcat 时，它实际上作为一个与Apache 独立的进程单独运行的。
Tomcat是一个免费的开源的Serlvet容器，用来运行java程序的容器
是开发和调试Servlet（Server Applet）、JSP（Java Server Pages） 程序的首选；
Tomcat就是传说中的中间件之一，tomcat本身是一个容器，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本身的运行也依赖于jdk环境。
tomcat部署
1.实现访问java测试网页
关闭selinux和防火墙
[root@localhost ~]# setenforce 0
[root@localhost ~]# sed -ri 's/^(SELINUX=).*/\1disabled/g' /etc/selinux/config
[root@localhost ~]# systemctl disable --now firewalld.service
安装java
[root@localhost ~]# dnf -y install java-17-openjdk.x86_64
下载tomcat二进制包,并解压
[root@localhost ~]# wget https://dlcdn.apache.org/tomcat/tomcat-10/v10.0.23/bin/apache-tomcat-10.0.23.tar.gz
[root@localhost ~]# ls
anaconda-ks.cfg apache-tomcat-10.0.23.tar.gz
[root@localhost ~]# tar -xzf apache-tomcat-10.0.23.tar.gz -C /usr/local/
[root@localhost ~]# cd /usr/local/
[root@localhost local]# ln -s apache-tomcat-10.0.23/ tomcat
[root@localhost local]# ls
apache-tomcat-10.0.23 etc include lib64 sbin src
bin games lib libexec share tomcat
自定义一个Hello World的 java的测试网页
[root@localhost tomcat]# mkdir webapps/test
[root@localhost tomcat]# vim webapps/test/index.jsp
<html>
<head>
<title>test page</title>
</head>
<body>
<%
out.println("Hello World");
%>
</body>
</html>
启动服务
[root@localhost tomcat]# bin/catalina.sh start
Using CATALINA_BASE: /usr/local/tomcat
Using CATALINA_HOME: /usr/local/tomcat
Using CATALINA_TMPDIR: /usr/local/tomcat/temp
Using JRE_HOME: /usr
Using CLASSPATH: /usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/tomcat-juli.jar
Using CATALINA_OPTS:
Tomcat started.
[root@localhost tomcat]# ss -antl
State Recv-Q Send-Q Local Address:Port Peer Address:Port Process
LISTEN 0 128 0.0.0.0:22 0.0.0.0:*
LISTEN 0 1 [::ffff:127.0.0.1]:8005 *:*
LISTEN 0 100 *:8080 *:*
LISTEN 0 128 [::]:22 [::]:*
2.能够成功登录到tomcat首页中的host manager、server status、manager app
访问Host Manager界面
配置tomcat-users.xml文件，在行上面添加两行，设置角色，登录用户名和密码，角色名称只能是admin-gui 用户名和密码自定义
[root@localhost ~]# vim /usr/local/tomcat/conf/tomcat-users.xml
...
<role rolename="admin-gui"/>
<user username="tomcat" password="123456" roles="admin-gui"/>
</tomcat-users>
配置host-manager/META-INF/context.xml文件，允许192.168.118.0/24网段访问，在allow字段后添加,在127前
[root@localhost ~]# vim /usr/local/tomcat/webapps/host-manager/META-INF/context.xml
21 <Valve className="org.apache.catalina.valves.RemoteAddrValve"
22 allow="192\.168\.118\.\d+|127\.\d+\.\d+\.\d+|::1|0:0:0:0:0:0:0:1" />
重启服务
[root@localhost ~]# /usr/local/tomcat/bin/catalina.sh stop
Using CATALINA_BASE: /usr/local/tomcat
Using CATALINA_HOME: /usr/local/tomcat
Using CATALINA_TMPDIR: /usr/local/tomcat/temp
Using JRE_HOME: /usr
Using CLASSPATH: /usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/tomcat-juli.jar
Using CATALINA_OPTS:
[root@localhost ~]# /usr/local/tomcat/bin/catalina.sh start
Using CATALINA_BASE: /usr/local/tomcat
Using CATALINA_HOME: /usr/local/tomcat
Using CATALINA_TMPDIR: /usr/local/tomcat/temp
Using JRE_HOME: /usr
Using CLASSPATH: /usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/tomcat-juli.jar
Using CATALINA_OPTS:
Tomcat started.
登录网页测试登录Host Manager 输入对应的用户名和密码
用户名为tomcat，密码为123456
访问Server Status
//编辑tomcat-users.xml
[root@localhost ~]# vim /usr/local/tomcat/conf/tomcat-users.xml
56 <role rolename="admin-gui"/>
57 <role rolename="manager-gui"/>
58 <user username="tomcat" password="123456" roles="admin-gui,manager-gui"/>
59 </tomcat-users>
//编辑manager/META-INF/context.xml，在allow字段添加允许192.168.89.0/24网段访问
[root@localhost ~]# vim /usr/local/tomcat/webapps/manager/META-INF/context.xml
21 <Valve className="org.apache.catalina.valves.RemoteAddrValve"
22 allow="192\.168\.118\.\d+|127\.\d+\.\d+\.\d+|::1|0:0:0:0:0:0:0:1" />
//重启服务，先关服务，再启服务
[root@localhost ~]# /usr/local/tomcat/bin/catalina.sh stop
Using CATALINA_BASE: /usr/local/tomcat
Using CATALINA_HOME: /usr/local/tomcat
Using CATALINA_TMPDIR: /usr/local/tomcat/temp
Using JRE_HOME: /usr
Using CLASSPATH: /usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/tomcat-juli.jar
Using CATALINA_OPTS:
[root@localhost ~]# /usr/local/tomcat/bin/catalina.sh start
Using CATALINA_BASE: /usr/local/tomcat
Using CATALINA_HOME: /usr/local/tomcat
Using CATALINA_TMPDIR: /usr/local/tomcat/temp
Using JRE_HOME: /usr
Using CLASSPATH: /usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/tomcat-juli.jar
Using CATALINA_OPTS:
Tomcat started.
登录网页，访问Server Status，用户名tomcat 密码123456
访问Manager App的时候就不需要密码了，因为访问了Server Status界面，所以不用输入密码
