As a starter guide, this article explains how to install Apache Tomcat 8, the latest stable version of Apache Tomcat, onto a Vultr CentOS 7 server instance. Before further reading, you need to. In order to use the 'Manager App' and the 'Host manager' in the Apache Tomcat web interface, you need to create an admin user for. How to Install and Configure Tomcat 8. In this tutorial I will show you how to install Tomcat 8 and tweak the configuration files. Enable Tomcat Manager.
I've just set up Tomcat 8 on an Ubuntu 14.04 VM and I'm not able to access the Manager App at http://[hostname]:8080/manager/html from my browser. I get a '403 Access Denied' error as soon as I click on it. I am running Tomcat as a service defined in a config file in /etc/init.d/tomcat8-dev. The error message indicates that Tomcat is set up to be accessible only from localhost initially, but as it is a hosted VM I'm not able to run a browser on it.
I have set up a user in the tomcat-users.xml file as several people have recommended. However, I am not prompted to provide the credentials for that user, and I can't find any kind of login button on the default page. That file currently looks like this:
After reading the Tomcat documentation page here, I have also tried adding <Valve /> tags into context.xml that look something like this:
However, as soon as I set privileged='true', I get a blank white page when I connect to the server with my browser regardless of the valves I provide afterwards.
I restart my service with sudo service tomcat8-dev restart whenever I make changes.
Other things I have tried based on posts I read here and on other sites:
- Various configurations of roles for my tomcat user
- Adding
address='0.0.0.0'toserver.xmlinside the<Connector />tag - Using
initctlinstead of setting up a service based on the instructions here, which doesn't load the default page on my server for some reason - Trying different browsers, and disabling my popup blocker
Nothing I've tried works. Please let me know if you would like more details about my situation. Any suggestions?
Edit: The problem was that I was editing the wrong context.xml file. The correct file is in tomcat/webapps/manager/META-INF. I had incorrectly been making changes to tomcat/conf/context.xml.
5 Answers
AFAIK Tomcat blocks access to the Manager App (manager/html) for all hosts but localhost in its default configuration.
To be able to access the manager GUI with http://[hostname]:8080/manager/html, configure this in the configuration files server.xml and the context.xml of the manager application:
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Step 1: In [tomcat-install-dir]/conf/server.xml edit the Connector element and add your IP as well as useIPVHosts='true', i.e.:
address='0.0.0.0' is probably not what you want to insert here, as it exposes the manager GUI to all machines on the network.
Step 2: In [tomcat-install-dir]/webapps/manager/META-INF/context.xml, edit the Valve element and add your IP:
From tomcat 8 context documentation
privileged : Set to true to allow this context to use container servlets, like the manager servlet.
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antiResourceLocking : If true, Tomcat will prevent any file locking. This will significantly impact startup time of applications, but allows full webapp hot deploy and undeploy on platforms or configurations where file locking can occur
Note, that I don't add another Valve element as you mentioned in the list of things you tried but instead I edit the existing one and just add my IP (192.168.0.9).
Step 3: Restart Tomcat and you should be able to access the manager GUI with localhost / 127.0.0.1 as well as with your hostname / IP.
Aside: Regarding your tomcat-users.xml, the Tomcat Manager HOW-TO states:
It is recommended to never grant the manager-script or manager-jmx roles to users that have the manager-gui role.
So you might want to introduce two users in your tomcat-users.xml, i.e.:
You can simply do like if you want to access manager app on all machines. Go to {Tomcat_install_DIR}/webapps/manager/META-INF/ and edit context.xml put
help-info.deYou should change:
to:
This is because you don't use Tomcat as distributed from upstream but the one which comes with Ubuntu.
I think this might help for all of you because its work for me.
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Edit tomcat-user.xml and added the roles and users
Yahya Hussein
I also fetched same issue and what i did first added role user and passowrd in config/tomcat-users.xml then allowed my public ip in webapps/manager/META-INF/context.xml there initially local ip 127 added for use manager from same machine. there add your ip
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This tutorial exists for these OS versions
- Ubuntu 18.04 (Bionic Beaver)
On this page
Apache Tomcat is an open source Java Servlet implementation developed by the Apache Software Foundation. In addition to the implementation of Java Servlets, Tomcat supports other Java server technologies too, including JavaServer Pages (JSP), Java Expression Language, and Java WebSocket. Tomcat provides an HTTP Web Server for Java applications that supports HTTP/2, OpenSSL for JSSE, and TLS virtual hosting.
In this tutorial, we will show you how to install and configure the Apache Tomcat 9.0.8 on Ubuntu 18.04 LTS (Bionic Beaver). We will also learn how to install Java on Ubuntu 18.04 LTS, configure a user for apache tomcat, and run the apache tomcat as a systemd service.
Prerequisites
- Ubuntu 18.04 - 64bit
- 2 GB or more memory (Recommended)
- Root Privileges
What we will do?
- Install Java on Ubuntu 18.04
- Configure Java Environment
- Install Apache Tomcat 9
- Configure Apache Tomcat as a Service
- Configure Apache Tomcat Users
- Testing
Step 1 - Install Java on Ubuntu 18.04
In this step, we will install Java JRE and JDK from the PPA repository. To do that, we have to install a new package 'software-properties-common' first for managing the repository.
Install 'software-properties-common' package.
Add the java 'webupd8team' repository using the 'add-apt-repository' command.
And install java using the apt command below.
When the installation is complete, check the java version installed on the system.
And you will get the result as below.
Java has been installed on Ubuntu 18.04.
Step 2 - Configure Java Environment
In the first step, we've installed Java. Now we need to configure the JAVA_HOME environment variable on the Ubuntu server so that Java applications can find the Java installation directory. Tomcat needs a JAVA_HOME environment to be set up properly.
Before we configure the JAVA_HOME environment, we need to know where the Java directory is. Check the location of the Java directory with the command below:
The java directory is '/usr/lib/jvm/java-8-oracle/jre'
Now edit the '/etc/environment' file using vim.
Paste the following configuration there.
Save and exit.
Edit the '~/.bashrc' file.
Paste the below configuration.
Save and exit.
Now reload the '~/.bashrc' script and test the 'JAVA_HOME' directory.
The java environment setup has been completed.
Step 3 - Install Apache Tomcat
In this step, we will install the Apache Tomcat under the 'tomcat' user and group. We will download the apache tomcat binary files, configure the Catalina tomcat servlet container environment, and do a first test of the Tomcat server.
Add new user and group named 'tomcat' using the commands below.
Now go to the '/opt/' directory and download the latest apache tomcat stable version (9.0.8) using the wget command.
Extract the apache tomcat package file and rename the directory to 'tomcat'.
Change the owner of tomcat directory and files to the 'tomcat' user and group, then make all apache tomcat binary files executable.
Next, we will configure the Catalina tomcat servlet container environment by editing the '~/.bashrc' file using vim.
Paste the following configuration there.
Save and exit.
Reload the '~/.bashrc' file and test the Catalina environment.
You will get the result as shown below.
Now test to run the Apache Tomcat itself.
Run the command below to start Apache tomcat.
And you'll see the result - apache tomcat has been started. It will run on the default port '8080' - you can check the port using netstat command.
The Apache Tomcat is running the server under port 8080.
Another way for testing the apache tomcat is by visiting the server IP address with port 8080.
And you will see the apache tomcat homepage as below.
Apache Tomcat has been installed on Ubuntu 18.04.
Now run the command below to stop the apache tomcat.
Step 4 - Configure Apache Tomcat as a Service
Tomcat Php Setup
In this tutorial, we want to run Apache Tomcat as tomcat user with a systemd service file so it can be started and stopped easily. Now we need to create the 'apache-tomcat.service' file.
Go to the systemd system directory and create a new file 'apache-tomcat.service'.
Paste the following configuration there:
Save and exit.
Now reload the systemd service.
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And start the 'apache-tomcat' service using the systemctl commands below.
The Apache Tomcat is now running as a service on Ubuntu 18.04, check it using following commands.
The Apache Tomcat is now running and it's using the port 8080 as a default port.
Step 5 - Configure Apache Tomcat User
In this step, we will configure the users for Apache Tomcat. We will add a new user to access the manager UI, and then allow the manager and host-manager access.
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Go to the '/opt/tomcat/conf' directory and edit the 'tomcat-users.xml' file using vim.
Paste the following configuration before the closing configuration '</tomcat-users>'.
Save and exit.
Now allow external access to the 'manager' dashboard by editing it's configuration 'context.xml' file.
Comment the 'allow' line 19-20.
Save and exit.
And for the 'host-manager'.
Comment the 'allow' line 19-20.
Save and exit.
Restart the Apache Tomcat service using the systemctl command. Hp color laserjet driver download.
The apache tomcat-users configuration, manager, and host-manager configuration has been completed.
Step 6 - Testing
Open your web browser and type in your server IP with port 8080. You will see the Apache Tomcat home page.
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Go to the manager dashboard with the URL below:
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Type the admin username 'hakase' with password 'hakasepassword01' from step 5.
Now go to the host-manager dashboard through URL below:
Enter the admin user and password from step 5, you will see the Tomcat Virtual Host Manager.
Apache Tomcat 9.0.8 has been installed successfully on Ubuntu 18.04 Bionic Beaver.
Running Php On Tomcat Server
Reference