openzipkin/java repository overview

ghcr.io/openzipkin/java is a minimal Docker image based on azul/zulu-openjdk-alpine⁠.

On GitHub Container Registry: ghcr.io/openzipkin/java⁠ there will be two tags per version. The one ending in -jre is a minimal build including modules Zipkin related images need. The unqualified is a JDK that also includes Maven.

⁠Release process

The Docker build is driven by --build-arg zulu_tag. The value of this must be Zulu's most-specific Java 15 tag, ex 15.0.0-15.27.17.

• You can look here https://hub.docker.com/r/azul/zulu-openjdk-alpine/tags?page=1&name=15⁠

Build the Dockerfile and verify the image you built matches that tag. Ex. docker build -t openzipkin/java:test-jre --build-arg zulu_tag=15.0.0-15.27.17 .

Next, verify the built image matches that zulu_tag.

For example, given the following output from docker run --rm openzipkin/java:test-jre -version...

openjdk version "15" 2020-09-15
OpenJDK Runtime Environment Zulu15.27+17-CA (build 15+36)
OpenJDK 64-Bit Server VM Zulu15.27+17-CA (build 15+36, mixed mode)

The zulu_tag arg should be 15.0.0-15.27.17

To release the image, push a tag named the same as the zulu_tag you built (ex 15.0.0-15.27.17). This will trigger a Travis CI⁠ job to push the image.

Note: The upstream Zulu repository has a monthly release cadence. Maintainers should watch the repo⁠, in case a pull request corresponds to a release. Since not all releases correspond to pull requests, another way is to just check again at each month end.