ubuntu-docker-images team mailing list archive

[Athos Ribeiro <athos.ribeiro@xxxxxxxxxxxxx>]

Hi,

Attached is a first version of the Kafka OCI Dockerfile.
It has been based on our other snap-based Dockerfiles.

Once everyone is happy with the Dockerfile proposed here, I will follow
up with launchpad MPs for the examples and documentation, as well as
github PRs for the OCI tests.

I decided not to add a default command or entrypoint to override the
base image one given the amount of binaries shipped by kafka (zookeeper,
the server, trogdor, producers and consumers, etc) and due to the need
of custom configuration files to execute those. Instead, we should write
good documentation on how to use the image.

If you want to test the image, you could:

start zookeeper:
  docker run --network=$YOUR_DOCKER_NETWORK --name=zookeeper --rm -it -p 2181:2181 $YOUR_IMAGE zookeeper-server-start.sh /etc/kafka/zookeeper.properties

start the kafka server:
  docker run --name=kafka --network=$YOUR_DOCKER_NETWORK --rm -it -p 9092:9092 $YOUR_IMAGE kafka-server-start.sh /etc/kafka/server.properties --override zookeeper.connect=zookeeper:2181

leave the above running and play with client binaries:
  docker run --rm -it --network $YOUR_DOCKER_NETWORK $YOUR_IMAGE kafka-topics.sh --create --partitions 1 --replication-factor 1 --topic quickstart-events --bootstrap-server kafka:9092

  docker run --rm -it --network $YOUR_DOCKER_NETWORK $YOUR_IMAGE kafka-topics.sh --describe --topic quickstart-events --bootstrap-server kafka:9092

  docker run --rm -it --network $YOUR_DOCKER_NETWORK $YOUR_IMAGE kafka-console-producer.sh --topic quickstart-events --bootstrap-server kafka:9092

  here you may type messages and use ctrl-c to exit; then you can
  inspect the messages with the consumer below.

  docker run --rm -it --network $YOUR_DOCKER_NETWORK $YOUR_IMAGE kafka-console-consumer.sh --topic quickstart-events --from-beginning --bootstrap-server kafka:9092

Please, let me know what you think.

--
Athos Ribeiro

FROM ubuntu:jammy AS snap-installer

RUN set -eux; \
	apt-get update && \
	DEBIAN_FRONTEND=noninteractive apt-get full-upgrade -y && \
	DEBIAN_FRONTEND=noninteractive apt-get install -y \
		jq curl ca-certificates squashfs-tools && \
	# taken from https://snapcraft.io/docs/build-on-docker
	# Alternatively, we can install snapd, and issue `snap download kafka`
	curl -L -H 'Snap-CDN: none' $(curl -H 'X-Ubuntu-Series: 16'  -H "X-Ubuntu-Architecture: $(dpkg --print-architecture)" 'https://api.snapcraft.io/api/v1/snaps/details/kafka?channel=rock/edge' | jq '.download_url' -r) --output kafka.snap && \
	mkdir -p /snap && unsquashfs -d /snap/kafka kafka.snap

FROM ubuntu:jammy

LABEL maintainer="Ubuntu Server team <ubuntu-server@xxxxxxxxxxxxxxxx>"

ENV TZ=UTC PATH=/opt/kafka/bin:$PATH

COPY --from=snap-installer /snap/kafka/opt/kafka /opt/kafka

# Copy the manifest files from the snap
COPY --from=snap-installer /snap/kafka/snap/snapcraft.yaml /usr/share/rocks/
COPY --from=snap-installer /snap/kafka/snap/manifest.yaml /usr/share/rocks/

RUN set -eux; \
  ln -s /opt/kafka/config /etc/kafka; \
	apt-get update; \
	DEBIAN_FRONTEND=noninteractive apt-get full-upgrade -y; \
	DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
		openjdk-11-jre-headless ca-certificates tzdata \
		; \
	DEBIAN_FRONTEND=noninteractive apt-get remove --purge --auto-remove -y; \
	rm -rf /var/lib/apt/lists/*; \
# create deb manifest
	(echo "# os-release" && cat /etc/os-release && echo "# dpkg-query" && dpkg-query -f '${db:Status-Abbrev},${binary:Package},${Version},${source:Package},${Source:Version}\n' -W) > /usr/share/rocks/dpkg.query

EXPOSE 2181 9092