From BaseX Documentation
Revision as of 22:50, 19 February 2016 by Jens Erat (talk | contribs) (latest instead of nightly.)
Jump to navigation Jump to search

The BaseX server is also available as automated build basex/basexhttp on the Docker Hub, providing both release and nightly builds. All images are automatically rebuild if Docker provides updated base images.

Running a BaseX Container

To start a BaseX container based on the latest development release publishing the BaseX server and HTTP ports 1984 and 8984 and bind-mounting your user's BaseXData directory, run

docker run -ti \
    --name basexhttp \
    --publish 1984:1984 \
    --publish 8984:8984 \
    --volume ~/BaseXData:/srv/BaseXData \

By passing any other BaseX executable, you can also for example run a BaseX client connecting to the linked BaseX server for management operations on the BaseX command line:

docker run -ti \
    --link basexhttp:basexhttp \
    basex/basexhttp:latest basexclient -nbasexhttp

BaseX is run under the basex user with fixed user ID 1984. The user's home directory is /srv. Several ports are exposed:

Port Description
1984 Server port
8984 HTTP port
8985 HTTP stop port

Leaving BaseX' defaults but --publishing them under another external port is recommended if you want to change the ports.

Administration with DBA

If you prefer the DBA web interface, this can also be linked against your server container:

docker run -d \
    --name basex-dba \
    --publix 18984:8984 \
    --link basexhttp:basexhttp \

The DBA is now available as http://localhost:8984/dba (adjust host name and port as needed). When logging in, connect to the linked container basexhttp by entering basexhttp:1984 into the Address field.

Security Considerations

The Docker image ships the unchanged default credentials. Especially if you publish the server port 1984 or link a public DBA instance against the container, make sure to change the default credentials by adding a custom .basex file.

When publishing ports, consider which interfaces to bind to, paying special attention to the server port 1984 and a possibly linked DBA web interface.

A common use case will be linking a well-researched and mature reverse proxy link nginx against the application container. Goals are to reduce exposure of BaseX and Jetty, adding TLS-encryption, serve static resources like images and perform URL rewrites as needed. For database administration and ad-hoc queries, an instance of the DBA will be linked with restricted access. Port `1984` is not published, but only linked to the DBA; the same applies to the HTTP port 8984 if you use a reverse proxy. If you need to access the command line, you can always docker exec into the container and run basexclient.

Running your own Application in a Docker Image

If you want to add your own application, create an image FROM basex/basexhttp:[tag] with [tag] being the BaseX version you're developing against. Usually, you will add your application code to /srv/BaseXWeb and modules to /srv/BaseXModule. BaseXData is persisted as a volume, which means it cannot be preinitialized in the application image.

Example: DBA

An example for creating your own Docker image based on basex/basexhttp is the DBA application. A Dockerfile was added to the source code's root directory. The very simple file contains only few statements:

FROM basex/basexhttp:latest
COPY . /srv/BaseXWeb

For general production usage, you should choose a fixed version instead of the development branch behind latest, so your application does not suddenly break because of unnoticed API changes. The most relevant part happens in the COPY statement, which adds the file's contents to the BaseXWeb directory. That's already it -- you're ready to run.

Advanced Usage

BaseX Configuration

If you need to adjust BaseX' configuration to tune the [Option option] defaults, add a .basex file to /srv:

COPY .basex /srv

Option not defined in the .basex file with be automatically set to BaseX' default values.

Jetty Configuration

If you need to change the embedded web server's configuration, you can always COPY a WEB-INF folder containing the required files and overwrite the predefined configuration.

Java Runtime Parameters

Larger applications and databases might require adjusted JRE parameters like increasing the memory limit. You can change those by setting the BASEX_JVM environment variable:

ENV BASEX_JVM="-Xmx2048m"

Installing Debian Packages

The basex/basexhttp Docker image is build own the official Maven Docker image, which again derives from Debian. You can add arbitrary Debian packages. Make sure to switch to the root user's context before installing packages and back to the basex user afterwards. As common in the Docker environment, you need to fetch the package catalog using apt-get update before installing packages and should clean up afterwards to keep the image small. This example installs some libraries required for image manipulation and adds them to the $CLASSPATH:

USER root

RUN apt-get update && \
    DEBIAN_FRONTEND=noninteractive apt-get install --no-install-recommends -y libbatik-java libxmlgraphics-commons-java libcommons-codec-java && \
    apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*

USER basex

ENV CLASSPATH="/usr/share/java/xml-commons-external.jar:/usr/share/java/xmlgraphics-commons.jar:/usr/share/java/batik.jar:usr/share/java/commons-codec.jar" \