Install and deploy tomcat service

foreword

Tomcat server is a free and open source Web application server , which belongs to the Apache Software Foundation and is a lightweight application server. It is the first choice for developing Java language and debugging JSP programs. Unlike Apache and Nginx, Tomcat's default port is 8080.

Tomcat's LOGO and mascot is designed as a male cat.

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Now to install the tomcat service, you need to close the selinux and firewall in the server first, this is directly operated

setenforce 0
iptables -F
systemctl stop firewalld

The server used to install the tomcat service today is CentOS7.9, the tomcat version is above 10, and the jdk environment is 19.0.2.

server	IP	tomcat version	JDK version
CentOS7.9	192.168.116.128	v10.1.7	19.0.2

1. Installation package location

The package location is still the same. Find the packages you need on the official website

JDK (Java Development Kit) is a Java language software development kit (SDK). To install tomcat, you need to start JDK first.

Both uploading and downloading are possible. It is recommended to install the compressed package locally first, and then upload it to the server, which will be faster. Of course, you can also use wget to download.
Both download methods are listed

The first method: download to the local and then use the rz command to upload
https://dlcdn.apache.org/tomcat/tomcat-10/v10.1.7/bin/apache-tomcat-10.1.7.tar.gz —tomcat10.1.7 version
https://download.java.net/java/GA/jdk19.0.2/fdb695a9d9064ad6b064dc6df578380c/7/GPL/openjdk-19.0.2_linux-x64_bin.tar.gz — JDK19.0.2 Version
2: Download directly from the server

wget https://dlcdn.apache.org/tomcat/tomcat-10/v10.1.7/bin/apache-tomcat-10.1.7.tar.gz
wget https://download.java.net/java/GA/jdk19.0.2/fdb695a9d9064ad6b064dc6df578380c/7/GPL/openjdk-19.0.2_linux-x64_bin.tar.gz

You can choose one of the above two methods, and here we directly use the first method to upload the compressed package.

2. Upload the software package

Upload the compressed package to the current directory of the server

rz
[root@localhost ~]# ls
anaconda-ks.cfg              initial-setup-ks.cfg                 公共  视频  文档  音乐
apache-tomcat-10.1.7.tar.gz  openjdk-19.0.2_linux-x64_bin.tar.gz  模板  图片  下载  桌面

Since the tomcat service runs based on the jdk development environment, we need to deploy and install the jdk environment first.

3. Install JDK

JDK (Java Development Kit) is a Java language software development kit (SDK)
JDK official website address: https://jdk.java.net

3.1 Create a directory to store JDK and decompress it

tar xfIndicates to decompress the compressed package file, -Cwhich means to store the decompressed file in the specified directory

[root@localhost ~]# mkdir -p /usr/local/jdk
[root@localhost ~]# tar xf openjdk-19.0.2_linux-x64_bin.tar.gz -C /usr/local/jdk

3.2 Setting environment variables

Environment variables need to be set so that JDK commands can be executed anywhere.

[root@localhost jdk]# cd jdk-19.0.2/
[root@localhost jdk-19.0.2]# pwd
/usr/local/jdk/jdk-19.0.2
[root@localhost jdk-19.0.2]# ls
bin  conf  include  jmods  legal  lib  release
[root@localhost jdk-19.0.2]# vim /etc/profile
[root@localhost jdk-19.0.2]# tail -4 !$
tail -4 /etc/profile
export JAVA_HOME=/usr/local/jdk/jdk-19.0.2
CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
PATH=$JAVA_HOME/bin:$PATH
export JAVA_HOME PATH CLASSPATH
[root@localhost jdk-19.0.2]# source /etc/profile

Fill in the file path where jdk is located
export JAVA_HOME=/usr/local/jdk/jdk-19.0.2

Set the Java environment variable to tell the jvm what path to use or execute the class on, so that the JVM can load the class file, .;indicating the current path, tools.jar and dt.jar are the class library path
CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

The command Java can be recognized in any path
PATH=$JAVA_HOME/bin:$PATH

After adding these contents to /etc/profile, the Java command can be used.

3.3 Check the JDK version

[root@localhost jdk-19.0.2]# java --version
openjdk 19.0.2 2023-01-17
OpenJDK Runtime Environment (build 19.0.2+7-44)
OpenJDK 64-Bit Server VM (build 19.0.2+7-44, mixed mode, sharing)

After the jdk development environment is in operation, you can start to install the tomcat service.

4. Install tomcat service

Tomcat official website address: https://tomcat.apache.org/
The speed of tomcat version update is relatively fast, with an average of 2-3 months to update a small version.

4.1 Unzip and move to the specified directory

Still use tar xfthe decompressed file and mvrename the directory file for easy viewing.

[root@localhost ~]# ls
anaconda-ks.cfg              openjdk-19.0.2_linux-x64_bin.tar.gz  视频  下载
apache-tomcat-10.1.7.tar.gz  公共                                 图片  音乐
initial-setup-ks.cfg         模板                                 文档  桌面
[root@localhost ~]# tar xf apache-tomcat-10.1.7.tar.gz -C /usr/local
[root@localhost ~]# cd !$
cd /usr/local
[root@localhost local]# mv apache-tomcat-10.1.7/ tomcat
[root@localhost local]# cd tomcat/
[root@localhost tomcat]# ls
bin           conf             lib      logs    README.md      RUNNING.txt  webapps
BUILDING.txt  CONTRIBUTING.md  LICENSE  NOTICE  RELEASE-NOTES  temp         work

4.2 View tomcat version

After entering binthe directory, you can directly execute the script to view versionthe version

[root@localhost tomcat]# cd bin/
[root@localhost bin]# ls
#后缀.bat是使用在windows平台的，而.sh是在Linux上启动的脚本。
bootstrap.jar                 configtest.bat  migrate.sh        tomcat-native.tar.gz
catalina.bat                  configtest.sh   setclasspath.bat  tool-wrapper.bat
catalina.sh                   daemon.sh       setclasspath.sh   tool-wrapper.sh
catalina-tasks.xml            digest.bat      shutdown.bat      version.bat
ciphers.bat                   digest.sh       shutdown.sh       version.sh
ciphers.sh                    makebase.bat    startup.bat
commons-daemon.jar            makebase.sh     startup.sh
commons-daemon-native.tar.gz  migrate.bat     tomcat-juli.jar

[root@localhost bin]# ./catalina.sh version
Using CATALINA_BASE:   /usr/local/tomcat
Using CATALINA_HOME:   /usr/local/tomcat
Using CATALINA_TMPDIR: /usr/local/tomcat/temp
Using JRE_HOME:        /usr/local/jdk/jdk-19.0.2
Using CLASSPATH:       /usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/tomcat-juli.jar
Using CATALINA_OPTS:   
Server version: Apache Tomcat/10.1.7
Server built:   Feb 27 2023 20:25:27 UTC
Server number:  10.1.7.0
OS Name:        Linux
OS Version:     3.10.0-1160.el7.x86_64
Architecture:   amd64
JVM Version:    19.0.2+7-44
JVM Vendor:     Oracle Corporation

4.3 start tomcat

tomcatThe startup script is in binthe directory

[root@localhost 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/local/jdk/jdk-19.0.2
Using CLASSPATH:       /usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/tomcat-juli.jar
Using CATALINA_OPTS:   
Tomcat started.

See the last display tomcat started已successfully started

4.4 tomcat listening port

Note that when you check the listening port, it is not 过滤tomcatthe name, but you need 过滤javaor 8080to see whether the service has started successfully.

#查看tomcat默认端口是8080
[root@localhost bin]# netstat -antp | grep java
tcp6       0      0 :::8080                 :::*                    LISTEN      56648/java          
tcp6       0      0 127.0.0.1:8005          :::*                    LISTEN      56648/java    

4.5 Access and view on the web page

Use the method of IP plus port to access, where IP adds the IP of your own server.
http://192.168.116.128:8080/

The installation up to here tomcatis complete.

Summarize

tomcatThe installation of .