Official Repository

Last pushed: 5 days ago
Short Description
Apache Tomcat is an open source implementation of the Java Servlet and JavaServer Pages technologies
Full Description

Supported tags and respective Dockerfile links

For more information about this image and its history, please see the relevant manifest file (library/tomcat). This image is updated via pull requests to the docker-library/official-images GitHub repo.

For detailed information about the virtual/transfer sizes and individual layers of each of the above supported tags, please see the repos/tomcat/tag-details.md file in the docker-library/repo-info GitHub repo.

What is Tomcat?

Apache Tomcat (or simply Tomcat) is an open source web server and servlet container developed by the Apache Software Foundation (ASF). Tomcat implements the Java Servlet and the JavaServer Pages (JSP) specifications from Oracle, and provides a "pure Java" HTTP web server environment for Java code to run in. In the simplest config Tomcat runs in a single operating system process. The process runs a Java virtual machine (JVM). Every single HTTP request from a browser to Tomcat is processed in the Tomcat process in a separate thread.

wikipedia.org/wiki/Apache_Tomcat

Logo © Apache Software Fountation

How to use this image.

Run the default Tomcat server (CMD ["catalina.sh", "run"]):

$ docker run -it --rm tomcat:8.0

You can test it by visiting http://container-ip:8080 in a browser or, if you need access outside the host, on port 8888:

$ docker run -it --rm -p 8888:8080 tomcat:8.0

You can then go to http://localhost:8888 or http://host-ip:8888 in a browser.

The default Tomcat environment in the image for versions 7 and 8 is:

CATALINA_BASE:   /usr/local/tomcat
CATALINA_HOME:   /usr/local/tomcat
CATALINA_TMPDIR: /usr/local/tomcat/temp
JRE_HOME:        /usr
CLASSPATH:       /usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/tomcat-juli.jar

The default Tomcat environment in the image for version 6 is:

CATALINA_BASE:   /usr/local/tomcat
CATALINA_HOME:   /usr/local/tomcat
CATALINA_TMPDIR: /usr/local/tomcat/temp
JRE_HOME:        /usr
CLASSPATH:       /usr/local/tomcat/bin/bootstrap.jar

The configuration files are available in /usr/local/tomcat/conf/. By default, no user is included in the "manager-gui" role required to operate the "/manager/html" web application. If you wish to use this app, you must define such a user in tomcat-users.xml.

Image Variants

The tomcat images come in many flavors, each designed for a specific use case.

tomcat:<version>

This is the defacto image. If you are unsure about what your needs are, you probably want to use this one. It is designed to be used both as a throw away container (mount your source code and start the container to start your app), as well as the base to build other images off of.

tomcat:alpine

This image is based on the popular Alpine Linux project, available in the alpine official image. Alpine Linux is much smaller than most distribution base images (~5MB), and thus leads to much slimmer images in general.

This variant is highly recommended when final image size being as small as possible is desired. The main caveat to note is that it does use musl libc instead of glibc and friends, so certain software might run into issues depending on the depth of their libc requirements. However, most software doesn't have an issue with this, so this variant is usually a very safe choice. See this Hacker News comment thread for more discussion of the issues that might arise and some pro/con comparisons of using Alpine-based images.

To minimize image size, it's uncommon for additional related tools (such as git or bash) to be included in Alpine-based images. Using this image as a base, add the things you need in your own Dockerfile (see the alpine image description for examples of how to install packages if you are unfamiliar).

License

View license information for the software contained in this image.

Supported Docker versions

This image is officially supported on Docker version 17.03.0-ce.

Support for older versions (down to 1.6) is provided on a best-effort basis.

Please see the Docker installation documentation for details on how to upgrade your Docker daemon.

User Feedback

Issues

If you have any problems with or questions about this image, please contact us through a GitHub issue. If the issue is related to a CVE, please check for a cve-tracker issue on the official-images repository first.

You can also reach many of the official image maintainers via the #docker-library IRC channel on Freenode.

Contributing

You are invited to contribute new features, fixes, or updates, large or small; we are always thrilled to receive pull requests, and do our best to process them as fast as we can.

Before you start to code, we recommend discussing your plans through a GitHub issue, especially for more ambitious contributions. This gives other contributors a chance to point you in the right direction, give you feedback on your design, and help you find out if someone else is working on the same thing.

Documentation

Documentation for this image is stored in the tomcat/ directory of the docker-library/docs GitHub repo. Be sure to familiarize yourself with the repository's README.md file before attempting a pull request.

Docker Pull Command

Comments (48)
hellr1de
a day ago

Hey everyone. Newcomer here. I'm trying to override the tomcat-user.xml file and restart the container after that. I tried mounting a volume to map a local folder to "/user/local/tomcat/conf", but I end up erasing all config files, thus causing the container to fail it's restart. Anyone found a way to do that? Thanks!

antoineco
a month ago

@saint31337 your comment is misleading, because this is simply not the config which is included with the image.

You can find out the actual one with docker run --rm tomcat cat conf/tomcat-users.xml, and realize there is no default user or password for security reasons.

saint31337
a month ago

Login and passwd for tomcat 8.0

<tomcat-users>
<role rolename="admin-gui"/>
<role rolename="admin-script"/>
<role rolename="manager-gui"/>
<role rolename="manager-script"/>
<role rolename="manager-jmx"/>
<role rolename="manager-status"/>
<user username="tomcat" password="secret" roles="manager-gui,manager-script,manager-jmx,manager-status,admin-script,admin-gui"/>

antoineco
a month ago

@migyecla only the environment variables supported by catalina.sh can be used as-is: http://svn.apache.org/repos/asf/tomcat/tc8.5.x/trunk/bin/catalina.sh. For configuring Tomcat further you have you have to push your own configuration files. See also: http://stackoverflow.com/a/23957805/4716370

@robymes: /usr/local/tomcat/logs

@kecelibu: use tomcat:7-jre8 or tomcat:8-jre8

migyecla
a month ago

How can I set up Tomcat manager login? I set TOMCAT_USERNAME and TOMCAT_PASSWORD but cant login to Tomcat Manager :-(

Thanks!! ;-)

kecelibu
2 months ago

Hi. I have pulled the latest tomcat and successfully deployed. I can reach tomcat server, but the problem is it is using 1.7 as JVM. But my application is running on 1.8. When I try to deploy, it gives an error. Is it possible to change it 1.8?

Thank you

robymes
2 months ago

I cannot find the catalina.out log file anywhere
where I can find it?

zygimantus
2 months ago

It is working like a charm.

hyunu529
3 months ago

how to login tomcat image??
I run tomcat using docker image and i wanna connect running tomcat container.
I try to attach running tomcat container. because running it, i can't enter command.

vgorcinschi
4 months ago

Hi, I'm trying to link an app deployed in a tomcat-7 container to a mysql container.

mysql container: docker run --name my-docker-sql -p 34591:3306 -d mysql

tomcat container: docker run --name d-tomcat -it --rm link my-docker-sql:mysql -v ....-p 8889:8080 tomcat:7.0-jre7

in my app I set the following jdbc address:
jdbc.url=jdbc:mysql://my-docker-sql:34591/dbname

Yet, the app fails to start with:
java.net.ConnectException: Connection refused (Connection refused)
and
java.sql.SQLException: Connections could not be acquired from the underlying database!

Any ideas on where am I going wrong here?