Dockerfile.service_discovery.multi

# Copyright (c) Microsoft Corporation.
# Licensed under the MIT license.
# SPDX-License-Identifier: MIT

ARG RUST_VERSION=1.70

FROM --platform=$BUILDPLATFORM docker.io/library/rust:${RUST_VERSION} AS builder

# Dockerfile for building Eclipse Chariott Service Discovery container
#
# This Dockerfile utilizes a two step build process. It builds Chariott
# Service Discovery with statically linked dependencies (using musl)
# for a x86_64 and aarch64 architecture, based on the TARGETARCH.

# Target architecture to cross-compile
ARG TARGETARCH

# Chariott user id
ARG CHARIOTT_UID=10001

RUN apt update && apt upgrade -y
RUN apt install -y cmake protobuf-compiler

WORKDIR /sdv

COPY ./ .

# Check that CHARIOTT_UID argument is valid.
RUN /sdv/container/scripts/argument_sanitizer.sh \
    --arg-value "${CHARIOTT_UID}" \
    --regex "^[0-9]+$" || \
    ( echo "Argument sanitizer failed for ARG 'CHARIOTT_UID'"; exit 1 )

# unprivileged identity to run Chariott Service Discovery as
RUN adduser \
    --disabled-password \
    --gecos "" \
    --home "/nonexistent" \
    --shell "/sbin/nologin" \
    --no-create-home \
    --uid "${CHARIOTT_UID}" \
    chariott

# Check that TARGETARCH argument is valid.
RUN /sdv/container/scripts/argument_sanitizer.sh \
    --arg-value "${TARGETARCH}" \
    --regex "^[a-zA-Z_0-9-]+$" || \
    ( echo "Argument sanitizer failed for ARG 'TARGETARCH'"; exit 1 )

# Based on the target architecture, add the appropriate build target and build service.
RUN if [ "$TARGETARCH" = "amd64" ]; then \
        CARGOARCH="x86_64-unknown-linux-musl"; \
    elif [ "$TARGETARCH" = "arm64" ]; then \
        apt install -y gcc-aarch64-linux-gnu; \
        CARGOARCH="aarch64-unknown-linux-musl"; \
    else \
        echo "Unsupported cross-compile architecture"; \
        exit 1; \
    fi; \
        rustup target add ${CARGOARCH}; \
        cargo build --release --target=${CARGOARCH} -p service_discovery; \
        mkdir -p /sdv/release && cp /sdv/target/${CARGOARCH}/release/service_discovery /sdv/release/service_discovery

####################################################################################################
## Final image
####################################################################################################
FROM --platform=$TARGETPLATFORM alpine:latest

# Import Chariott user and group from builder.
COPY --from=builder /etc/passwd /etc/passwd
COPY --from=builder /etc/group /etc/group

WORKDIR /sdv

# Copy our build
COPY --from=builder /sdv/release/service_discovery /sdv/service_discovery

# Use the unprivileged chariott user during execution.
USER chariott:chariott

CMD ["./service_discovery"]