Reduce teh image size

- Reduced the image size from 1.3G to 400MB

Signed-off-by: Dimal Baby <[email protected]>

Author: dimalbaby

base-image/Dockerfile

@@ -1,63 +1,56 @@
 # Copyright © 2018 VMware, Inc. All Rights Reserved.
 # SPDX-License-Identifier: BSD-2-Clause
+# Similar to https://github.com/drecom/docker-centos-ruby/blob/2.6.5-slim/Dockerfile
 
-FROM photon:3.0
+ARG RUBY_PATH=/usr/local
+ARG RUBY_VERSION=2.6.5
 
-# rever user fluent from parent
-USER root
+FROM photon:3.0 AS rubybuild
+ARG RUBY_PATH
+ARG RUBY_VERSION
+RUN tdnf erase -y toybox && tdnf install -y bzip2 shadow wget which vim less tar gzip util-linux sed gcc build-essential zlib-devel libedit libedit-devel gdbm gdbm-devel openssl-devel systemd net-tools git
+
+COPY basegems/Gemfile Gemfile
+RUN git clone git://github.com/rbenv/ruby-build.git $RUBY_PATH/plugins/ruby-build \
+    &&  $RUBY_PATH/plugins/ruby-build/install.sh \
+    && ruby-build $RUBY_VERSION $RUBY_PATH/ \
+    && gem install -g --file Gemfile \
+    && gem uninstall rake -v 12.3.2 \
+    && gem uninstall bigdecimal -v 1.4.1
 
+FROM photon:3.0
+ARG RUBY_PATH
+ENV PATH $RUBY_PATH/bin:$PATH
+COPY --from=rubybuild $RUBY_PATH $RUBY_PATH
 # Not sure why this is needed: see https://github.com/fluent/fluentd-kubernetes-daemonset/blob/master/docker-image/v1.4/debian-elasticsearch/Dockerfile
 ENV FLUENTD_DISABLE_BUNDLER_INJECTION 1
-
 # start with a valid empty file
 COPY failsafe.conf /fluentd/failsafe.conf
-
 # custom entrypoint
 COPY entrypoint.sh /fluentd/entrypoint.sh
 
-# list gems here
-COPY Gemfile /fluentd
+USER root
 
 ENTRYPOINT ["/fluentd/entrypoint.sh"]
-
-RUN tdnf update -y && tdnf upgrade -y && tdnf erase -y toybox
-RUN tdnf install -y shadow wget which vim less tar gzip util-linux sed gcc build-essential zlib1g-dev zlib-devel libedit libedit-devel gdbm gdbm-devel openssl-devel systemd net-tools
-
-RUN curl -o ruby.tgz https://cache.ruby-lang.org/pub/ruby/2.6/ruby-2.6.5.tar.gz \
-  && tar xvzf ruby.tgz \
-  && cd ruby-2.6.5 \
-  && ./configure && make && make install
-
-COPY basegems/Gemfile Gemfile
-RUN gem install -g --file Gemfile && mv Gemfile Gemfile.base
-
-ENV FLUENTD_CONF=""
-ENV FLUENTD_DISABLE_BUNDLER_INJECTION 1
-ENV PATH /fluentd/vendor/bundle/ruby/2.6.0/bin:$PATH
-
-RUN mkdir -p /fluentd/log /fluentd/etc /fluentd/plugins
+# list gems here
 COPY Gemfile /fluentd
-
-RUN buildDeps="\
-    gmp-devel libffi-devel" \
-    && tdnf install -y $buildDeps \
-    && echo 'gem: --no-document' >> /etc/gemrc \
-    && bundle config silence_root_warning true \
-    && wget https://github.com/vmware/fluent-plugin-vmware-log-intelligence/releases/download/v2.0.0/fluent-plugin-vmware-log-intelligence-2.0.0.gem \
-    && bundle install --gemfile=/fluentd/Gemfile \
-    && fluent-gem install --local fluent-plugin-vmware-log-intelligence-2.0.0.gem \
-    && tdnf clean all \
-    && tdnf remove -y $buildDeps \
-    && gem sources --clear-all \
-    && rm -rf /tmp/* /var/tmp/* /usr/lib/ruby/gems/*/cache/*.gem /fluent-plugin-vmware-log-intelligence-2.0.0.gem ruby.tgz ruby-2.6.5
+RUN mkdir -p /fluentd/log /fluentd/etc /fluentd/plugins /usr/local/bundle/bin/ \
+	&& tdnf erase -y toybox \
+	&& buildDeps="\
+	gmp-devel libffi-devel bzip2 shadow wget which vim less tar gzip sed gcc build-essential zlib-devel libedit libedit-devel gdbm gdbm-devel openssl-devel" \
+	&& tdnf install -y $buildDeps util-linux systemd net-tools\
+	&& wget https://raw.githubusercontent.com/fluent/fluentd-kubernetes-daemonset/master/docker-image/v1.4/debian-elasticsearch/plugins/parser_kubernetes.rb -P /fluentd/plugins \
+	&& wget https://raw.githubusercontent.com/fluent/fluentd-kubernetes-daemonset/master/docker-image/v1.4/debian-elasticsearch/plugins/parser_multiline_kubernetes.rb -P /fluentd/plugins \
+	&& echo 'gem: --no-document' >> /etc/gemrc \
+	&& bundle config silence_root_warning true \
+	&& wget https://github.com/vmware/fluent-plugin-vmware-log-intelligence/releases/download/v2.0.0/fluent-plugin-vmware-log-intelligence-2.0.0.gem \
+	&& bundle install --gemfile=/fluentd/Gemfile \
+	&& fluent-gem install --local fluent-plugin-vmware-log-intelligence-2.0.0.gem \
+	&& tdnf clean all \
+	&& gem sources --clear-all \
+	&& ln -s $(which fluentd) /usr/local/bundle/bin/fluentd \
+	&& tdnf remove -y $buildDeps \
+	&& rm -rf /tmp/* /var/tmp/* /usr/lib/ruby/gems/*/cache/*.gem /fluent-plugin-vmware-log-intelligence-2.0.0.gem
 
 EXPOSE 24444 5140
-
-
-# copy k8s config
-ADD https://raw.githubusercontent.com/fluent/fluentd-kubernetes-daemonset/master/docker-image/v1.4/debian-elasticsearch/plugins/parser_kubernetes.rb /fluentd/plugins
-ADD https://raw.githubusercontent.com/fluent/fluentd-kubernetes-daemonset/master/docker-image/v1.4/debian-elasticsearch/plugins/parser_multiline_kubernetes.rb /fluentd/plugins
-
 COPY plugins /fluentd/plugins
-RUN mkdir -p /usr/local/bundle/bin/ && ln -s $(which fluentd) /usr/local/bundle/bin/fluentd
-RUN gem uninstall rake -v 12.3.2