tomcat简介
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和其他一些公司及个人共同开发而成。
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。
Tomcat和Nginx、Apache(httpd)、lighttpd等Web服务器一样，具有处理HTML页面的功能，另外它还是一个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Nginx/Apache服务器。
目前Tomcat最新版本为9.0。Java容器还有resin、weblogic等。
tomcat安装
第一步：官网下载安装包
https://tomcat.apache.org/
第二步：上传安装包
[root@root ~]# rz
[root@root ~]# ls
apache-tomcat-9.0.17.zip
[root@root ~]#
第三步：解压安装包
[root@root ~]# unzip apache-tomcat-9.0.17.zip
第四步：移动文件到/usr/local
[root@root ~]# mv apache-tomcat-9.0.17 /usr/local/tomcat
第五步：加执行权限
[root@root local]# chmod -R +x tomcat/
第六步：下载java环境（jdk）
[root@root bin]# yum install java -y #java-1.8.0-openjdk
第七步：启动tomcat
[root@root bin]# ./startup.sh
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
Tomcat started.
第八步：检测端口
[root@root bin]# ss -tnl
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:127.0.0.1:8005 :::*
LISTEN 0 100 :::8009 :::*
LISTEN 0 100 :::8080 :::*
LISTEN 0 128 :::80 :::*
LISTEN 0 128 :::22 :::*
LISTEN 0 100 ::1:25 :::*
第九步：浏览器访问
第十步：关闭tomcat
[root@root bin]# ./shutdown.sh
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
tomcat网站根目录
webapps
tomcat日志
logs/catalina.out
tomcat主配置文件
[root@root tomcat]# vim conf/server.xml
<Server port=”8005″ shutdown=”SHUTDOWN”>
<Connector port=”8080″ protocol=”HTTP/1.1″
<Connector port=”8009″ protocol=”AJP/1.3″ redirectPort=”8443″ />
<Host name=”localhost” appBase=”webapps”
8005端口接收shutdown指令
[root@root tomcat]# telnet 127.0.0.1 8005
Trying 127.0.0.1…
Connected to 127.0.0.1.
Escape character is ‘^]’.
SHUTDOWN
Connection closed by foreign host.
[root@root tomcat]#
[root@root tomcat]#
[root@root tomcat]# ss -tnl
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 128 *:22 *:*
LISTEN 0 100 127.0.0.1:25 *:*
LISTEN 0 128 :::80 :::*
LISTEN 0 128 :::22 :::*
LISTEN 0 100 ::1:25 :::*
tomcat多实例部署-三台
第一步：复制两份tomcat文件
[root@root local]# ls
bin etc games include lib lib64 libexec sbin share src tomcat
[root@root local]# cp tomcat tomcat1 -a
[root@root local]# cp tomcat tomcat2 -a
[root@root local]# ls
bin etc games include lib lib64 libexec sbin share src tomcat tomcat1 tomcat2
第二步：修改tomcat1端口
只需要修改两处：
8005–》8006
8080–》8081
第三步：修改tomcat2端口
只需要修改两处：
8005–》8007
8080–》8082
第四步：启动各个tomcat实例
[root@root local]# tomcat/bin/startup.sh
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
Tomcat started.
[root@root local]# tomcat1/bin/startup.sh
Using CATALINA_BASE: /usr/local/tomcat1
Using CATALINA_HOME: /usr/local/tomcat1
Using CATALINA_TMPDIR: /usr/local/tomcat1/temp
Using JRE_HOME: /usr
Using CLASSPATH: /usr/local/tomcat1/bin/bootstrap.jar:/usr/local/tomcat1/bin/tomcat-juli.jar
Tomcat started.
[root@root local]# tomcat2/bin/startup.sh
Using CATALINA_BASE: /usr/local/tomcat2
Using CATALINA_HOME: /usr/local/tomcat2
Using CATALINA_TMPDIR: /usr/local/tomcat2/temp
Using JRE_HOME: /usr
Using CLASSPATH: /usr/local/tomcat2/bin/bootstrap.jar:/usr/local/tomcat2/bin/tomcat-juli.jar
Tomcat started.
第五步：查看端口
[root@root local]# ss -tnl
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:127.0.0.1:8005 :::*
LISTEN 0 100 :::8009 :::*
LISTEN 0 100 :::8080 :::*
LISTEN 0 128 :::80 :::*
LISTEN 0 100 :::8081 :::*
LISTEN 0 100 :::8082 :::*
LISTEN 0 128 :::22 :::*
LISTEN 0 100 ::1:25 :::*
第六步：访问网站
tomcat集群部署
nginx服务器：192.168.64.5
tomcat集群： 192.168.64.4
第一步：部署tomcat后端节点
第二步：编辑nginx配置文件
upstream song {
server 192.168.64.4:8080 weight=2 max_fails=2 fail_timeout=2;
server 192.168.64.4:8081 weight=4 max_fails=2 fail_timeout=2;
server 192.168.64.4:8082 weight=1 max_fails=2 fail_timeout=2;
}
…
location / {
proxy_pass http://song;
}
第三步：检测nginx配置并启动
[root@root yum.repos.d]# nginx -t
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful
[root@root yum.repos.d]# systemctl restart nginx
第四步：浏览器访问
访问的是nginx服务器
tomcat上线jpress博客系统
第一步：下载jpress
https://gitee.com/fuhai/jpress/blob/alpha/wars/jpress-web-newest.war
第二步：上传软件包并解压
[root@root ROOT]# ls
fuhai-jpress-alpha.zip
[root@root ROOT]# unzip fuhai-jpress-alpha.zip
第三步：复制
[root@root ROOT]# cp jpress/wars/jpress-web-newest.war .
[root@root ROOT]# ls
fuhai-jpress-alpha.zip jpress jpress-web-newest.war
第四步：解压jpress-web-newest.war
[root@root ROOT]# unzip jpress-web-newest.war
第五步：浏览器访问
输入ip:8080/jpress
第六步：下载数据库并启动
[root@root ROOT]# yum install mariadb-server -y
[root@root ROOT]# systemctl restart mariadb
第七步：创建数据库和用户
[root@root ROOT]# mysql -uroot
Welcome to the MariaDB monitor. Commands end with ; or g.
Your MariaDB connection id is 2
Server version: 5.5.60-MariaDB MariaDB Server
Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
Type ‘help;’ or ‘h’ for help. Type ‘c’ to clear the current input statement.
MariaDB [(none)]> create database ken;
Query OK, 1 row affected (0.00 sec)
MariaDB [(none)]> grant all on *.* to ken@’localhost’ identified by ‘123’;
Query OK, 0 rows affected (0.00 sec)
第八步：浏览器输入数据库相关的库和用户
第九步：重启tomcat
[root@root bin]# ./shutdown.sh
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
[root@root bin]# ./startup.sh
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
Tomcat started.
第十步：再次访问浏览器
就可以访问了