Dockerfile

# syntax=docker/dockerfile:1

# Build Image
FROM golang:1.22.7-alpine3.20 AS builder
RUN go install github.com/sberk42/fritzbox_exporter@latest \
    && mkdir /app \
    && mv /go/bin/fritzbox_exporter /app

WORKDIR /app

COPY metrics.json metrics-lua.json /app/

# Runtime Image
FROM alpine:3.18 as runtime-image

ARG REPO=sberk42/fritzbox_exporter

LABEL org.opencontainers.image.source https://github.com/${REPO}

ENV USERNAME username
ENV PASSWORD password
ENV GATEWAY_URL http://fritz.box:49000
ENV GATEWAY_LUAURL http://fritz.box
ENV LISTEN_ADDRESS 0.0.0.0:9042

RUN mkdir /app \
    && addgroup -S -g 1000 fritzbox \
    && adduser -S -u 1000 -G fritzbox fritzbox \
    && chown -R fritzbox:fritzbox /app

WORKDIR /app

COPY --chown=fritzbox:fritzbox --from=builder /app /app

EXPOSE 9042

ENTRYPOINT [ "sh", "-c", "/app/fritzbox_exporter" ]
CMD [ "-username", "${USERNAME}", "-password", "${PASSWORD}", "-gateway-url", "${GATEWAY_URL}", "-gateway-luaurl", "${GATEWAY_LUAURL}", "-listen-address", "${LISTEN_ADDRESS}" ]