Dockerfile.amd64

# Fluentd watcher agent
FROM golang:1.22.5-alpine3.19 as buildergo
RUN mkdir -p /fluentd
RUN mkdir -p /code
COPY . /code/
WORKDIR /code
RUN echo $(ls -al /code)
RUN CGO_ENABLED=0 go build -ldflags '-w -s' -o /fluentd/fluentd-watcher /code/cmd/fluent-watcher/fluentd/main.go

# Fluentd main image
FROM alpine:3.20
LABEL Description="Fluentd docker image" Vendor="Fluent Organization" Version="1.17.0"

# Do not split this into multiple RUN!
# Docker creates a layer for every RUN-Statement
# therefore an 'apk delete' has no effect
RUN apk update \
 && apk add --no-cache \
        ca-certificates \
        ruby ruby-irb ruby-etc ruby-webrick \
        tini \
 && apk add --no-cache --virtual .build-deps \
        build-base linux-headers \
        ruby-dev gnupg \
 && echo 'gem: --no-document' >> /etc/gemrc \
 && gem install oj -v 3.13.22 \
 && gem install json -v 2.6.2 \
 && gem install async -v 1.30.3 \
 && gem install async-http -v 0.56.6 \
 && gem install fluentd -v 1.17.0 \
 && gem install bigdecimal -v 1.4.4 \
# NOTE: resolv v0.2.1 includes the fix for CPU spike issue due to DNS resolver.
# This hack is needed for Ruby 2.6.7, 2.7.3 and 3.0.1. (alpine image is still kept on 2.7.3)
 && gem install resolv -v 0.2.1 \
 && gem install elasticsearch -v 7.13.3 \
 && gem install elasticsearch-xpack -v 7.13.3 \
 && gem install fluent-plugin-detect-exceptions -v 0.0.14 \
 && gem install \
         fluent-plugin-s3 \
         fluent-plugin-grok-parser \
         fluent-plugin-rewrite-tag-filter \
         fluent-plugin-oss \
         fluent-plugin-dedot_filter \
         fluent-plugin-sumologic_output \
         fluent-plugin-kafka \
         fluent-plugin-label-router \
         fluent-plugin-record-modifier \
         fluent-plugin-multi-format-parser \
         fluent-plugin-aws-elasticsearch-service \
         fluent-plugin-opensearch \
         fluent-plugin-grafana-loki \
         fluent-plugin-cloudwatch-logs \
         fluent-plugin-datadog \
         fluent-plugin-prometheus \
 && apk del .build-deps \
 && rm -rf /tmp/* /var/tmp/* /usr/lib/ruby/gems/*/cache/*.gem /usr/lib/ruby/gems/2.*/gems/fluentd-*/test

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

ENV FLUENTD_CONF="fluent.conf"

ENV LD_PRELOAD=""
# NOTE: resolv v0.2.1 includes the fix for CPU spike issue due to DNS resolver.
# Forcing to load specific version of resolv (instead of bundled by default) is needed for Ruby 2.6.7, 2.7.3 and 3.0.1.
# alpine image is still kept on 2.7.3. See https://pkgs.alpinelinux.org/packages?name=ruby&branch=v3.13
ENV RUBYLIB="/usr/lib/ruby/gems/2.7.0/gems/resolv-0.2.1/lib"
EXPOSE 24224 5140

USER fluent

COPY ./cmd/fluent-watcher/fluentd/base/fluent.conf /fluentd/etc/
COPY ./cmd/fluent-watcher/fluentd/app/app.conf /fluentd/etc/

# copy the output in buildergo
COPY --from=buildergo /fluentd/fluentd-watcher /fluentd/bin/fluentd-watcher
# Entry point
ENTRYPOINT ["/fluentd/bin/fluentd-watcher"]