Force ruby platform not to use rdkafla native gem

Since rdkafka 0.22.x, x86_64-linux-gnu gem does not support
 SASL by default. To keep compatibility, do not use pre-built gem.

Signed-off-by: Kentaro Hayashi <[email protected]>

Author: kenhys

docker-image/v1.19/arm64/debian-kafka/Dockerfile

@@ -22,7 +22,7 @@ RUN buildDeps="sudo make gcc g++ libc-dev libffi-dev build-essential autoconf au
      -y --no-install-recommends \
      $buildDeps $runtimeDeps net-tools \
     && gem install bundler --version 2.4.17 \
-    && bundle config silence_root_warning true \
+    && bundle config silence_root_warning true && bundle config set force_ruby_platform true \
     && bundle install --gemfile=/fluentd/Gemfile --path=/fluentd/vendor/bundle \
     && SUDO_FORCE_REMOVE=yes \
     apt-get purge -y --auto-remove \

docker-image/v1.19/arm64/debian-kafka2/Dockerfile

@@ -22,7 +22,7 @@ RUN buildDeps="sudo make gcc g++ libc-dev libffi-dev build-essential autoconf au
      -y --no-install-recommends \
      $buildDeps $runtimeDeps net-tools \
     && gem install bundler --version 2.4.17 \
-    && bundle config silence_root_warning true \
+    && bundle config silence_root_warning true && bundle config set force_ruby_platform true \
     && bundle install --gemfile=/fluentd/Gemfile --path=/fluentd/vendor/bundle \
     && SUDO_FORCE_REMOVE=yes \
     apt-get purge -y --auto-remove \

docker-image/v1.19/debian-kafka/Dockerfile

@@ -21,7 +21,7 @@ RUN buildDeps="sudo make gcc g++ libc-dev libffi-dev build-essential autoconf au
      -y --no-install-recommends \
      $buildDeps $runtimeDeps net-tools \
     && gem install bundler --version 2.4.17 \
-    && bundle config silence_root_warning true \
+    && bundle config silence_root_warning true && bundle config set force_ruby_platform true \
     && bundle install --gemfile=/fluentd/Gemfile --path=/fluentd/vendor/bundle \
     && SUDO_FORCE_REMOVE=yes \
     apt-get purge -y --auto-remove \

docker-image/v1.19/debian-kafka2/Dockerfile

@@ -21,7 +21,7 @@ RUN buildDeps="sudo make gcc g++ libc-dev libffi-dev build-essential autoconf au
      -y --no-install-recommends \
      $buildDeps $runtimeDeps net-tools \
     && gem install bundler --version 2.4.17 \
-    && bundle config silence_root_warning true \
+    && bundle config silence_root_warning true && bundle config set force_ruby_platform true \
     && bundle install --gemfile=/fluentd/Gemfile --path=/fluentd/vendor/bundle \
     && SUDO_FORCE_REMOVE=yes \
     apt-get purge -y --auto-remove \

templates/Dockerfile.erb

@@ -30,7 +30,7 @@ RUN buildDeps="sudo make gcc g++ libc-dev libffi-dev<% if target == "graylog" %>
      -y --no-install-recommends \
      $buildDeps $runtimeDeps net-tools \
     && gem install bundler --version 2.4.17 \
-    && bundle config silence_root_warning true<% if target == "azureblob" %> && bundle config build.nokogiri --use-system-libraries<% end %> \
+    && bundle config silence_root_warning true<% if target == "azureblob" %> && bundle config build.nokogiri --use-system-libraries<% end %><% if target == "kafka" || target == "kafka2" %> && bundle config set force_ruby_platform true<% end %> \
     && bundle install --gemfile=/fluentd/Gemfile --path=/fluentd/vendor/bundle \
 <% if target == "s3" %>
     && curl -sL -o columnify_0.1.0_Linux_x86_64.tar.gz https://github.com/reproio/columnify/releases/download/v0.1.0/columnify_0.1.0_Linux_x86_64.tar.gz \