# Copyright 2017 The Kubernetes Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# This Dockerfile will build an image that is configured
# to run Fluentd with an Elasticsearch plug-in and the
# provided configuration file.
# The image acts as an executable for the binary /usr/sbin/td-agent.
# Note that fluentd is run with root permssion to allow access to
# log files with root only access under /var/log/containers/*

FROM debian:buster-slim

ARG DEBIAN_FRONTEND=noninteractive

COPY install.sh /tmp/install.sh
COPY Gemfile /Gemfile

RUN chmod +x /tmp/install.sh && \
    /bin/bash -l -c /tmp/install.sh && \
    rm /tmp/*

# Copy the Fluentd configuration file for logging Docker container logs.
COPY fluent.conf /etc/fluent/fluent.conf
COPY run.sh /run.sh

# Expose prometheus metrics.
EXPOSE 80

ENV LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libjemalloc.so.2

# Start Fluentd to pick up our config that watches Docker container logs.
CMD ["/run.sh"]