Apache Tomcat, often referred to as Tomcat, is an open-source web server and servlet container developed by the Apache Software Foundation (ASF). Tomcat implements several Java EE specifications including Java Servlet, JavaServer Pages (JSP), Java EL, and WebSocket, and provides a "pure Java" HTTP web server environment for Java code to run in.
docker run --name tomcat bitnami/tomcat:latest
tomcat:
image: bitnami/tomcat:latest
The recommended way to get the Bitnami Tomcat Docker Image is to pull the prebuilt image from the Docker Hub Registry.
docker pull bitnami/tomcat:latest
To use a specific version, you can pull a versioned tag. You can view the list of available versions in the Docker Hub Registry.
docker pull bitnami/tomcat:[TAG]
If you wish, you can also build the image yourself.
docker build -t bitnami/tomcat:latest https://github.com/bitnami/bitnami-docker-tomcat.git
If you remove the container all your Tomcat configurations and deployments will be lost. To avoid this you should mount a volume that will persist even after the container is removed.
Note! If you have already started using your Tomcat deployment, follow the steps on backing up and restoring to pull the data from your running container down to your host.
The image exposes a volume at /bitnami/tomcat
for the Tomcat configurations and application deployments. For persistence you can mount a directory at this location from your host. If the mounted directory is empty, it will be initialized on the first run.
docker run -v /path/to/tomcat-persistence:/bitnami/tomcat bitnami/tomcat:latest
or using Docker Compose:
tomcat:
image: bitnami/tomcat:latest
volumes:
- /path/to/tomcat-persistence:/bitnami/tomcat
The /bitnami/tomcat/data
directory is configured as the Tomcat webapps deployment directory. At this location, you either copy a so-called exploded web application, i.e. non-compressed, or a compressed web application resource (.WAR
) file and it will automatically be deployed by Tomcat.
Additionally a helper symlink /app
is present that points to the webapps deployment directory which enables us to deploy applications on a running Tomcat instance by simply doing:
docker cp /path/to/app.war tomcat:/app
Note! You can also deploy web applications on a running Tomcat instance using the Tomcat management interface.
Further Reading:
To access your web server from your host machine you can ask Docker to map a random port on your host to port 8080
exposed in the container.
docker run --name tomcat -P bitnami/tomcat:latest
Run docker port
to determine the random ports Docker assigned.
$ docker port tomcat
8080/tcp -> 0.0.0.0:32768
You can also manually specify the ports you want forwarded from your host to the container.
docker run -p 8080:8080 bitnami/tomcat:latest
Access your web server in the browser by navigating to http://localhost:8080.
By default, a management user named user
is created and is not assigned a password. Passing the TOMCAT_PASSWORD
environment variable when running the image for the first time will set the password of this user to the value of TOMCAT_PASSWORD
.
Additionally you can specify a user name for the management user using the TOMCAT_USER
environment variable. When not specified, the TOMCAT_PASSWORD
configuration is applied on the default user (user
).
docker run --name tomcat \
-e TOMCAT_USER=my_user \
-e TOMCAT_PASSWORD=my_password \
bitnami/tomcat:latest
or using Docker Compose:
tomcat:
image: bitnami/tomcat:latest
environment:
- TOMCAT_USER=my_user
- TOMCAT_PASSWORD=my_password
This image looks for Tomcat configuration files in /bitnami/tomcat/conf
. You may recall from the persisting your tomcat configurations and deployments section, /bitnami/tomcat
is the path to the persistence volume.
Create a directory named conf/
at this location with your own configuration, or the default configuration will be copied on the first run which can be customized later.
Run the Tomcat image, mounting a directory from your host.
docker run --name tomcat -v /path/to/tomcat-persistence:/bitnami/tomcat bitnami/tomcat:latest
or using Docker Compose:
tomcat:
image: bitnami/tomcat:latest
volumes:
- /path/to/tomcat-persistence:/bitnami/tomcat
Edit the configuration on your host using your favorite editor.
eg.
vim /path/to/tomcat-persistence/conf/server.xml
After changing the configuration, restart your Tomcat container for the changes to take effect.
docker restart tomcat
or using Docker Compose:
docker-compose restart tomcat
Further Reading:
The Bitnami Tomcat Docker image sends the container logs to the stdout
. To view the logs:
docker logs tomcat
or using Docker Compose:
docker-compose logs tomcat
You can configure the containers logging driver using the --log-driver
option if you wish to consume the container logs differently. In the default configuration docker uses the json-file
driver.
To backup your configuration and logs, follow these simple steps:
docker stop tomcat
or using Docker Compose:
docker-compose stop tomcat
We need to mount two volumes in a container we will use to create the backup: a directory on your host to store the backup in, and the volumes from the container we just stopped so we can access the data.
docker run --rm -v /path/to/tomcat-backups:/backups --volumes-from tomcat busybox \
cp -a /bitnami/tomcat /backups/latest
or using Docker Compose:
docker run --rm -v /path/to/tomcat-backups:/backups --volumes-from `docker-compose ps -q tomcat` busybox \
cp -a /bitnami/tomcat /backups/latest
Restoring a backup is as simple as mounting the backup as volumes in the container.
docker run -v /path/to/tomcat-backups/latest:/bitnami/tomcat bitnami/tomcat:latest
or using Docker Compose:
tomcat:
image: bitnami/tomcat:latest
volumes:
- /path/to/tomcat-backups/latest:/bitnami/tomcat
Bitnami provides up-to-date versions of Tomcat, including security patches, soon after they are made upstream. We recommend that you follow these steps to upgrade your container.
docker pull bitnami/tomcat:latest
or if you're using Docker Compose, update the value of the image property to
bitnami/tomcat:latest
.
Before continuing, you should backup your container's configuration and logs.
Follow the steps on creating a backup.
docker rm -v tomcat
or using Docker Compose:
docker-compose rm -v tomcat
Re-create your container from the new image, restoring your backup if necessary.
docker run --name tomcat bitnami/tomcat:latest
or using Docker Compose:
docker-compose start tomcat
This image is tested for expected runtime behavior, using the Bats testing framework. You can run the tests on your machine using the bats
command.
bats test.sh
- All volumes have been merged at
/bitnami/tomcat
. Now you only need to mount a single volume at/bitnami/tomcat
for persistence. - The logs are always sent to the
stdout
and are no longer collected in the volume.
We'd love for you to contribute to this container. You can request new features by creating an issue, or submit a pull request with your contribution.
If you encountered a problem running this container, you can file an issue. For us to provide better support, be sure to include the following information in your issue:
- Host OS and version
- Docker version (
docker version
) - Output of
docker info
- Version of this container (
echo $BITNAMI_APP_VERSION
inside the container) - The command you used to run the container, and any relevant output you saw (masking any sensitive information)
Copyright 2015 Bitnami
Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.