Dockerfile.cross

ARG BUILD_IMAGE=grafana/loki-build-image:0.33.1
# Directories in this file are referenced from the root of the project not this folder
# This file is intended to be called from the root like so:
# docker build -t grafana/promtail -f clients/cmd/promtail/Dockerfile .
FROM 1.22.2-alpine as goenv
RUN go env GOARCH > /goarch && \
  go env GOARM > /goarm

FROM --platform=linux/amd64 $BUILD_IMAGE as build
COPY --from=goenv /goarch /goarm /
COPY . /src/loki
WORKDIR /src/loki
RUN make clean && GOARCH=$(cat /goarch) GOARM=$(cat /goarm) make BUILD_IN_CONTAINER=false PROMTAIL_JOURNAL_ENABLED=true promtail

# Promtail requires debian as the base image to support systemd journal reading
FROM debian:12.5-slim
# tzdata required for the timestamp stage to work
RUN apt-get update && \
  apt-get install -qy tzdata ca-certificates wget libsystemd-dev && \
  rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
COPY --from=build /src/loki/clients/cmd/promtail/promtail /usr/bin/promtail
COPY clients/cmd/promtail/promtail-local-config.yaml /etc/promtail/local-config.yaml
COPY clients/cmd/promtail/promtail-docker-config.yaml /etc/promtail/config.yml
ENTRYPOINT ["/usr/bin/promtail"]
CMD ["-config.file=/etc/promtail/config.yml"]