70 lines
2.2 KiB
Docker
70 lines
2.2 KiB
Docker
# Copyright 2017 The Kubernetes Authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# This Dockerfile will build an image that is configured
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# to run Fluentd with an Elasticsearch plug-in and the
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# provided configuration file.
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# The image acts as an executable for the binary /usr/sbin/td-agent.
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# Note that fluentd is run with root permssion to allow access to
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# log files with root only access under /var/log/containers/*
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# 1. Install & configure dependencies.
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# 2. Install fluentd via ruby.
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# 3. Remove build dependencies.
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# 4. Cleanup leftover caches & files.
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FROM ruby:2.7-slim-buster as builder
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ARG DEBIAN_FRONTEND=noninteractive
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COPY Gemfile /Gemfile
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SHELL ["/bin/bash", "-e", "-o", "pipefail", "-c"]
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# hadolint ignore=DL3008,DL3028
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RUN apt-get update && \
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apt-get install -y --no-install-recommends g++ gcc make && \
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rm -rf /var/lib/apt/lists/* && \
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echo 'gem: --no-document' >> /etc/gemrc && \
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gem install --file Gemfile
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FROM ruby:2.7-slim-buster
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ARG DEBIAN_FRONTEND=noninteractive
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# Copy the Fluentd configuration file for logging Docker container logs.
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COPY fluent.conf /etc/fluent/fluent.conf
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COPY entrypoint.sh /entrypoint.sh
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COPY --from=builder /usr/local/bundle/ /usr/local/bundle
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SHELL ["/bin/bash", "-e", "-o", "pipefail", "-c"]
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# hadolint ignore=DL3008
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RUN apt-get update && \
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apt-get install -y --no-install-recommends libjemalloc2 && \
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apt-get clean -y && \
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ulimit -n 65536 && \
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rm -rf \
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/var/cache/debconf/* \
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/var/lib/apt/lists/* \
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/var/log/* \
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/var/tmp/* \
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rm -rf /tmp/*
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# Expose prometheus metrics.
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EXPOSE 80
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# Start Fluentd to pick up our config that watches Docker container logs.
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CMD ["/entrypoint.sh"]
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