FROM golang:1.18.1-alpine3.15 as builder
ARG ELASTICSTACK_VERSION=8.1.2

WORKDIR /build

ENV GOMAXPROCS="4"

RUN apk update
RUN apk add git bash make gcc musl-dev binutils-gold
RUN git clone --single-branch --branch="v${ELASTICSTACK_VERSION}" --depth=1 https://github.com/elastic/beats.git
RUN cd beats/filebeat/ && \
    make


FROM alpine:3.15

COPY --chown=root:filebeat filebeat.yml /usr/share/filebeat/filebeat.yml
COPY --chmod=750 --from=builder /build/beats/filebeat/filebeat /usr/local/bin/filebeat
COPY --chmod=750 entrypoint.sh /entrypoint.sh

ENTRYPOINT ["/entrypoint.sh"]

CMD ["filebeat", "-e", "--strict.perms=false", "-c", "/usr/share/filebeat/filebeat.yml"]