Dockerfile

FROM alpine:edge
MAINTAINER Tony Shao <xiocode@gmail.com>

# Do not split this into multiple RUN!
# Docker creates a layer for every RUN-Statement
# therefore an 'apk delete build*' has no effect

RUN echo "http://nl.alpinelinux.org/alpine/edge/testing/" >> /etc/apk/repositories
RUN apk --no-cache --update add \
                            bash \
                            sudo \
                            shadow \
                            tini \
                            build-base \
                            ca-certificates \
                            ruby \
                            ruby-irb \
                            ruby-dev && \
    echo 'gem: --no-document' >> /etc/gemrc && \
    gem install oj && \
    gem install fluentd -v 0.12.26 && \
    apk del build-base ruby-dev && \
    rm -rf /tmp/* /var/tmp/* /var/cache/apk/*

RUN adduser -D -g '' -u 1000 -h /home/fluent fluent
RUN chown -R fluent:fluent /home/fluent

# for log storage (maybe shared with host)
RUN mkdir -p /fluentd/log
# configuration/plugins path (default: copied from .)
RUN mkdir -p /fluentd/etc /fluentd/plugins
RUN chown -R fluent:fluent /fluentd

WORKDIR /home/fluent

# Tell ruby to install packages as user
RUN echo "gem: --user-install --no-document" >> /home/fluent/.gemrc
ENV PATH /home/fluent/.gem/ruby/2.3.0/bin:$PATH
ENV GEM_PATH /home/fluent/.gem/ruby/2.3.0:$GEM_PATH

COPY fluent.conf /fluentd/etc/

EXPOSE 24224 5140

COPY ./docker-entrypoint.sh /
ENTRYPOINT ["/sbin/tini", "--", "/docker-entrypoint.sh"]