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Current docker image proposal is hosted on https://github.com/caiok/bookkeeper-docker

Below are shown Main emphasis points are shown below.

Docker Image

The proposed image image:

  • Is very similar to Zookeeper one (here the github sources)
  • Is based on Alpine Linux, a very appreciated distro for docker image (for lightweightness and security orientation)
    • (warning) Problem: Alpine uses a lightweight libc implementation that could lead to some compatibility issues with some system specific java libraries. The only problem I encountered so far is with Linux native epoll in Netty 4 (an issue for BK 4.5.0).
  • Follows nearly all docker official image guidelines

    • (warning) Problem: it currenty lacks only the key import in gpg signature verification. The best practice is:

      Code Block
      # gpg: key F73C700D: public key "Larry Hastings <larry@hastings.org>" imported
RUN curl -fSL "https://www.python.org/ftp/python/$PYTHON_VERSION/Python-$PYTHON_VERSION.tar.xz" -o python.tar.xz \
    && curl -fSL "https://www.python.org/ftp/python/$PYTHON_VERSION/Python-$PYTHON_VERSION.tar.xz.asc" -o python.tar.xz.asc \
    && export GNUPGHOME="$(mktemp -d)" \
    && gpg --keyserver ha.pool.sks-keyservers.net --recv-keys 97FC712E4C024BBEA48A61ED3A5CA953F73C700D \
    && gpg --batch --verify python.tar.xz.asc python.tar.xz \
    && rm -r "$GNUPGHOME" python.tar.xz.asc \
    # install

      In current docker build "gpg --keyserver" and "gpg --batch" are commented.

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  • We will include bookkeeper build files in the main repository, in a directory named "bookkeeper-docker".
  • We will provide a docker build file for each released version (starting from 4.4.0). Each build will be contained in a subdirectory named like the label we want to assign to it (i.e "4.4.0/" for image "apache/bookkeer:4.4.0").
    • The docker build file and all related files contained in these subdirectories will be used by dockerhub to create automated builds for every version.
    • (question)Question Question: could be useful provide a docker build "onbuild" for the last snapshot of the current development version?
  • Main directory will contain the Readme to be shown in dockerhub image page
  • (question) Currently main directory contains a Makefile that shows how to use bookkeeper image in order to build up a fully functional ensemble of 1 zookkeper, 3 bookies and 2 bookkeeper tutorial (a simple dice rolling application) containers. This makefile has been very useful to me in order to test builds and could be useful to who is approaching bookkeeper providing a functional example to play with, but it could be easily removed, if desired.