Dockerfile

FROM fluent/fluentd-kubernetes-daemonset:v1.11-debian-elasticsearch7-1

USER root

COPY Gemfile* /fluentd/

RUN buildDeps="sudo make gcc g++ libc-dev libffi-dev" \
  runtimeDeps="" \
      && apt-get update \
     && apt-get upgrade -y \
     && apt-get install \
     -y --no-install-recommends \
     $buildDeps $runtimeDeps \
    && gem install bundler --version 2.1.4 \
    && bundle config silence_root_warning true \
    && bundle install --gemfile=/fluentd/Gemfile --path=/fluentd/vendor/bundle \
    && SUDO_FORCE_REMOVE=yes \
    apt-get purge -y --auto-remove \
                  -o APT::AutoRemove::RecommendsImportant=false \
                  $buildDeps \
 && rm -rf /var/lib/apt/lists/* \
    && gem sources --clear-all \
    && rm -rf /tmp/* /var/tmp/* /usr/lib/ruby/gems/*/cache/*.gem