Tomcat installation and configuration under CentOS 7 (Tomcat startup)

I. Introduction####

What is the scope of this article?

• Tomcat 7+
• CentOS 7

Ready to work?

• Install JDK https://ken.io/note/centos-java-setup

Environmental information?

• CentOS 7.X
• JDK 1.8.0_151
• Tomcat 8.5.24

Second, the installation process

• Download Tomcat

# Open download directory
cd /home/download

# Download the tar package
wget http://mirrors.hust.edu.cn/apache/tomcat/tomcat-8/v8.5.24/bin/apache-tomcat-8.5.24.tar.gz

Download address of Tomcat7 official website: https://tomcat.apache.org/download-70.cgi
Download address of Tomcat8 official website: https://tomcat.apache.org/download-80.cgi

• Configure tomcat directory

# Create tomcat directory
sudo mkdir /usr/tomcat

# Unzip to the specified directory
sudo tar -zvxf apache-tomcat-8.5.24.tar.gz -C /usr/tomcat

# Rename the directory to tomcat8
mv /usr/tomcat/apache-tomcat-8.5.24/usr/tomcat/tomcat8

• Specify JDK

If the system default JDK version is JDK 1.8.x, you can omit this step
If multiple Tomcats need to be deployed in the system, for example: Tomcat 7+JDK 7, Tomcat 8 + JDK 8 coexist then the following configuration is required:

The default Java version of the machine can be viewed through the command java -version

1、 Modify catalina.sh file

# Modify catalina.sh
vi /usr/tomcat/tomcat8/bin/catalina.sh

# Add the following configuration:

export JAVA_HOME=/usr/java/jdk1.8.0_151

2、 Modify the setclasspath.sh file

# Modify setclasspath.sh
vi /usr/tomcat/tomcat8/bin/setclasspath.sh

# Add the following configuration:

export JAVA_HOME=/usr/java/jdk1.8.0_151

Among them, /usr/java/jdk1.8.0_151 is because the server JDK8 tested by ken.io is in this directory
, Replace it with the jdk directory of the server during actual deployment

• Modify port

Non-essential operation, if you need to deploy multiple Tomcats, you need to modify the port

# Modify server.xml
vi /usr/tomcat/tomcat8/conf/server.xml

Find the following line, Tomcat default port is 8080, modify it according to your needs

< Connector port="8080" protocol="HTTP/1.1"
    connectionTimeout="20000"
    redirectPort="8443"/>

• Open port

# Open port 8080
firewall-cmd --add-port=8080/tcp --permanent && firewall-cmd --reload

# Reload firewall rules
firewall-cmd --reload

• Activate/deactivate

# start up
cd /usr/tomcat/tomcat8/bin && sh startup.sh

# Deactivate
cd /usr/tomcat/tomcat8/bin && sh shutdown.sh

Access ip through browser: 8080

Three, configure Tomcat to start up

It is very simple to configure Tomcat to start up, just configure Tomcat as a system service.

• Configure tomcat8.service:

# Create Tomcat8 service file
vi /usr/lib/systemd/system/tomcat8.service

# tomcat8.Service file content:

[ Unit]  
Description=Tomcat8  
After=syslog.target network.target remote-fs.target nss-lookup.target  

[ Service]  
Type=forking  

ExecStart=/usr/tomcat/tomcat8/bin/startup.sh
ExecReload=/usr/tomcat/tomcat8/bin/startup.sh
ExecStop=/usr/tomcat/tomcat8/bin/shutdown.sh

[ Install]
WantedBy=multi-user.target

• Configure startup

# Set Tomcat8 to boot
systemctl enable tomcat8

# Start tomcat8 service
systemctl start tomcat8