Tomcat server: can't configure port 80 and multiple domain names

October 27, 2018 1k views
Java Initial Server Setup Ubuntu 16.04

I'm trying to configure 80 port and several domain names for my server.

After reading some questions and answers I edited my server.xml file like this:

<?xml version="1.0" encoding="UTF-8"?>

<Server port="8005" shutdown="SHUTDOWN">
  <Listener className="org.apache.catalina.startup.VersionLoggerListener" />

  <Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" />

  <Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" />
  <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />
  <Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener" />


  <GlobalNamingResources>

    <Resource name="UserDatabase" auth="Container"
              type="org.apache.catalina.UserDatabase"
              description="User database that can be updated and saved"
              factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
              pathname="conf/tomcat-users.xml" />
  </GlobalNamingResources>


  <Service name="Catalina">


    <Connector **port="80"** protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="8443" />

    <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />

    <Engine name="Catalina" defaultHost="localhost">


      <Realm className="org.apache.catalina.realm.LockOutRealm">

        <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
               resourceName="UserDatabase"/>
      </Realm>

      <Host name="localhost"  appBase="webapps"
            unpackWARs="true" autoDeploy="true">


        <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
               prefix="localhost_access_log" suffix=".txt"
               pattern="%h %l %u %t &quot;%r&quot; %s %b" />

      </Host>

      **<Host name="codingrecords.tk"  appBase="webapps"
            unpackWARs="true" autoDeploy="true">

         <Alias>www.codingrecords.tk</Alias>


        <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
               prefix="localhost_access_log" suffix=".txt"
               pattern="%h %l %u %t &quot;%r&quot; %s %b" />


       <Context path="" docBase="/opt/tomcat/webapps/Test"
    debug="0" reloadable="true"/>

      </Host>**


    </Engine>
  </Service>
</Server>

Namely, I changed the port in <Connector> and added an extra <Host> block. However now not only can't I access the file by IP, IP:80, IP:8080, I also can't access it using codingrecords.tk domain name. The domain name has two A records that point to my droplet's IP address.

1 Answer
InverseWolf October 28, 2018
Accepted Answer

I figured it out with the help of stackoverflow. The problem was that the port was never truly changed from 8080 to 80. It happened because although I was connected as a root user to the VPS, the tomcat automatically switched to non-root user tomcat, because of /etc/systemd/system/tomcat.service file:

[Unit]
Description=Apache Tomcat Web Application Container
After=network.target

[Service]
Type=forking

Environment=JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-amd64/jre
Environment=CATALINA_PID=/opt/tomcat/temp/tomcat.pid
Environment=CATALINA_HOME=/opt/tomcat
Environment=CATALINA_BASE=/opt/tomcat
Environment='CATALINA_OPTS=-Xms512M -Xmx1024M -server -XX:+UseParallelGC'
Environment='JAVA_OPTS=-Djava.awt.headless=true -Djava.security.egd=file:/dev/./urandom'

ExecStart=/opt/tomcat/bin/startup.sh
ExecStop=/opt/tomcat/bin/shutdown.sh

User=tomcat
Group=tomcat
UMask=0007
RestartSec=10
Restart=always

[Install]
WantedBy=multi-user.target

So I changed a User=tomcat to User=root, restarted everything and now it works fine!

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