Tomcat 10 : Install |
Install Tomcat 10 to configure Java Application Server. | |
| [1] | |
| [2] | Install Tomcat 10. Make sure the latest version and source URL on download site. ⇒ https://tomcat.apache.org/download-10.cgi |
| [root@dlp ~]# curl -O http://ftp.riken.jp/net/apache/tomcat/tomcat-10/v10.0.22/bin/apache-tomcat-10.0.22.tar.gz [root@dlp ~]# tar zxvf apache-tomcat-10.0.22.tar.gz [root@dlp ~]# mv apache-tomcat-10.0.22 /usr/libexec/tomcat10 [root@dlp ~]# useradd -M -d /usr/libexec/tomcat10 tomcat [root@dlp ~]# chown -R tomcat. /usr/libexec/tomcat10 |
| [3] | Create a Systemd Setting file. |
[root@dlp ~]# vi /usr/lib/systemd/system/tomcat10.service # create new [Unit] Description=Apache Tomcat 10 After=network.target [Service] Type=oneshot ExecStart=/usr/libexec/tomcat10/bin/startup.sh ExecStop=/usr/libexec/tomcat10/bin/shutdown.sh RemainAfterExit=yes User=tomcat Group=tomcat [Install] WantedBy=multi-user.target systemctl enable --now tomcat10 |
| [4] | If SELinux is enabled, change policy to start Tomcat. |
[root@dlp ~]# vi catalinash.te # create new module catalinash 1.0;
require {
type init_t;
type admin_home_t;
class file { append execute execute_no_trans ioctl open read };
}
#============= init_t ==============
allow init_t admin_home_t:file { append execute execute_no_trans ioctl open read };
checkmodule -m -M -o catalinash.mod catalinash.te [root@dlp ~]# semodule_package --outfile catalinash.pp --module catalinash.mod [root@dlp ~]# semodule -i catalinash.pp |
| [5] | If Firewalld is running and also access to Tomcat from other Hosts, allow ports. |
| [root@dlp ~]# firewall-cmd --add-port=8080/tcp success [root@dlp ~]# firewall-cmd --runtime-to-permanent success |
| [6] | Start a Web browser on localhost or clients on the network and access to [http://(server's hostname or IP address):8080/], then Tomcat default site is displayed like follows. |
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| [7] | Create a test servlet which shows current date and make sure it works normally. |
| [root@dlp ~]# mkdir /usr/libexec/tomcat10/webapps/ROOT/WEB-INF/classes [root@dlp ~]# chown tomcat. /usr/libexec/tomcat10/webapps/ROOT/WEB-INF/classes [root@dlp ~]# cd /usr/libexec/tomcat10/webapps/ROOT/WEB-INF/classes [root@dlp classes]# vi daytime.java # from Tomcat 10, migrated to Jakarta EE # so it needs to replace [javax.*] to [jakarta.*] import java.io.*;
import jakarta.servlet.*;
import jakarta.servlet.http.*;
import java.util.Calendar;
public class daytime extends HttpServlet {
public void doGet(HttpServletRequest request
,HttpServletResponse response)
throws IOException, ServletException{
response.setContentType("text/html");
PrintWriter out = response.getWriter();
Calendar cal = Calendar.getInstance();
out.println("<html>\n<head>\n<title>DayTime</title>\n</head>\n<body>");
out.println("<div style=\"font-size: 40px; text-align: center; font-weight: bold\">");
out.println(cal.get(Calendar.YEAR) + "/" + (cal.get(Calendar.MONTH) + 1) + "/" +
cal.get(Calendar.DATE) + " " + cal.get(Calendar.HOUR_OF_DAY) + ":" + cal.get(Calendar.MINUTE));
out.println("</div>\n</body>\n</html>");
}
}
javac -classpath /usr/libexec/tomcat10/lib/servlet-api.jar daytime.java [root@dlp classes]# vi /usr/libexec/tomcat10/webapps/ROOT/WEB-INF/web.xml # add follows between <web-app> - </web-app> <servlet>
<servlet-name>daytime</servlet-name>
<servlet-class>daytime</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>daytime</servlet-name>
<url-pattern>/daytime</url-pattern>
</servlet-mapping>
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| [8] | Access to [http://(server's hostname or IP address):8080/daytime] to make sure it works normally. |
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