Docker files for Jena 3.16

This repository hosts Docker recipes for distributing Apache Jena.

Two Docker images are available:

• fuseki-singledb - Based on fuseki, it's better suited for Kubernetes deployments, since its configuration is supposed to be based on ttl config files instead of environment variables, and the support for starting with multiple databases has been droped. It also has a few additions, including support for GELF Kafka Logs and a custom implementation for the ConcatenateGraphFilter Lucene filter.
• jena - riot command line and friends, for use on the command line
• fuseki - the Fuseki 2 server with SPARQL endpoint and web interface

Building

docker build -t jena jena
docker build -t jena-fuseki jena-fuseki

Dockerfile overview

The Dockerfiles for both images use the official openjdk:11-jre-slim-buster base image, which is based on the [debian](https://hub.docker.com/_/debian/):buster-slim image; this clocks in at about 69 MB

The ENV variables like JENA_VERSION and FUSEKI_VERSION determines which version of Jena and Fuseki are downloaded. Updating the version also requires updating the JENA_SHA512 and FUSEKI_SHA512 variables, which values should match the official Jena download .tar.gz.sha512 hashes, as approved in their release [VOTE] emails.

The ASF_MIRROR use http://www.apache.org/dyn/mirrors/mirrors.cgi that redirect to a local mirror, with a fallback to the ASF_ARCHIVE http://archive.apache.org/dist/ for older versions. Note that due to subsequent sha512 checking these accessed with http rather than https.

To minimize layer size, there's a single RUN with curl, sha512sum, tar zxf and mv - thus the temporary files during download and extraction are not part of the final image.

Some files from the Apache Jena distributions are stripped, e.g. javadocs and the fuseki.war file.

The Fuseki image includes some helper scripts to do tdb loading using fuseki-server.jar. In addition Fuseki has a [docker-entrypoint.sh](https://github.com/stain/jena-docker/blob/master/jena-fuseki/docker-entrypoint.sh) that populates shiro.ini with the password provided as -e ADMIN_PASSWORD to Docker, or with a new randomly generated password that is printed the first time.