Which grok-exporter Dockerfile?

[jesperronn]

Hi Emil, thanks for providing these scripts open-source.

I have a question about

https://github.com/magenta-aps/apache_log_exporter/blob/master/docker-compose.yml#L9

  grok_exporter:
    image: magentaaps/grok_exporter:latest-rc

I cannot find the dockerfile anywhere to supposedly build the image. Where do I find it?

[Skeen]

I believe this should be the image: https://hub.docker.com/r/magentaaps/grok_exporter

[jesperronn]

Thanks for the fast reply. My question is not about the image. My question is where to find the dockerfile used to build the image :)

[Skeen]

Ah! - I'm sorry! - My bad. It's on our internal gitlab repository, but I can reproduce it here:

#############################
# Multi-Stage Build

FROM golang:stretch as builder
ENV GITHUB_REPOSITORY=github.com/magenta-aps/grok_exporter

# Install system deps
#   We need this in order to build oniguruma.
#   The debian deb packages for onigurma do not install static libs
RUN apt-get update && apt-get -y install build-essential make autoconf libtool

# Oniguruma: fetch, build, and install static libs
RUN cd /tmp && \
    git clone https://github.com/kkos/oniguruma.git && \
    cd /tmp/oniguruma && \
    autoreconf -vfi && \
    ./configure && \
    make && \
    make install

# grok_exporter: fetch source code
RUN mkdir -p /go/src/$GITHUB_REPOSITORY
RUN git clone https://$GITHUB_REPOSITORY.git /go/src/$GITHUB_REPOSITORY

# Fetch Golang Dependencies
WORKDIR /go/src/$GITHUB_REPOSITORY
RUN git submodule update --init --recursive
RUN go get

# Build Statically-Linked Binary
RUN GOOS=linux GOARCH=amd64 CGO_ENABLED=1 go build \
    -ldflags "-w -extldflags \"-static\" \
    -X ./exporter.Version=$VERSION \
    -X ./exporter.BuildDate=$(date +%Y-%m-%d) \
    -X ./exporter.Branch=$(git rev-parse --abbrev-ref HEAD) \
    -X ./exporter.Revision=$(git rev-parse --short HEAD) \
    "

RUN cp /go/src/$GITHUB_REPOSITORY/grok_exporter /srv/grok_exporter
RUN cp -r /go/src/$GITHUB_REPOSITORY/logstash-patterns-core /srv/logstash-patterns-core

#############################
# Final-Stage Build

FROM alpine:latest

WORKDIR /app

COPY --from=builder /srv/grok_exporter /app/grok_exporter
COPY --from=builder /srv/logstash-patterns-core /app/logstash-patterns-core

EXPOSE 9144
ENTRYPOINT [ "/app/grok_exporter" ]

Let me know if you need any more help, and I apologize for misunderstanding!

[Skeen]

I think I just kinda hijacked the Dockerfile from here: https://github.com/fstab/grok_exporter/pull/62/files

And the only changes to the magenta-aps/grok_exporter repository is the inclusion of fstab/grok_exporter#100, maybe other PRs too.

I'm afraid I do not remember the details, but you should be able to derive it from the commits on that repository if you so desire.

• Either way the it looks like the json_lines webhook input format has been merged, so there may not be any need for our fork.