Dockerfile.otlp

# Dockerfile.otlp
# Builds dynolog with both Prometheus and OTLP metrics export.
# Uses local source tree as build context (COPY . approach).
#
# Build on Linux x86_64 dev host:
#   docker build -t dynolog:v0.3.0-otlp -f Dockerfile.otlp .
#
# Build time: ~5-10 min (protobuf stubs from opentelemetry-proto)

# --- Build stage ---
FROM ubuntu:22.04 AS builder

ENV DEBIAN_FRONTEND=noninteractive

RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    cmake \
    ninja-build \
    git \
    ca-certificates \
    curl \
    libboost-all-dev \
    libnl-3-dev \
    libnl-route-3-dev \
    libelf-dev \
    libssl-dev \
    libcurl4-openssl-dev \
    libprotobuf-dev \
    protobuf-compiler \
    pkg-config \
    && rm -rf /var/lib/apt/lists/*

# Rust (needed for the dyno CLI)
RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
ENV PATH="/root/.cargo/bin:${PATH}"

# Build prometheus-cpp from source (for USE_PROMETHEUS=ON)
RUN git clone --depth 1 --branch v1.3.0 --recurse-submodules \
    https://github.com/jupp0r/prometheus-cpp.git /src/prometheus-cpp \
    && cd /src/prometheus-cpp \
    && cmake -S . -B build -G Ninja \
       -DCMAKE_BUILD_TYPE=Release \
       -DENABLE_TESTING=OFF \
       -DENABLE_PUSH=OFF \
       -DBUILD_SHARED_LIBS=ON \
    && cmake --build build -j$(nproc) \
    && cmake --install build

# Copy local dynolog source (includes opentelemetry-proto submodule)
COPY . /src/dynolog
WORKDIR /src/dynolog

# Build with both Prometheus AND OTLP.
# OTLP uses protobuf stubs generated from opentelemetry-proto + libcurl.
RUN cmake -S . -B build -G Ninja \
    -DCMAKE_BUILD_TYPE=Release \
    -DBUILD_TESTING=OFF \
    -DCPR_ENABLE_SSL=ON \
    -DUSE_PROMETHEUS=ON \
    -DUSE_OTLP=ON \
    && cmake --build build --target dynolog -j$(nproc)

# --- Runtime stage ---
FROM ubuntu:22.04

RUN apt-get update && apt-get install -y --no-install-recommends \
    libboost-program-options1.74.0 \
    libboost-system1.74.0 \
    libnl-3-200 \
    libnl-route-3-200 \
    libelf1 \
    libssl3 \
    libcurl4 \
    ca-certificates \
    wget \
    && rm -rf /var/lib/apt/lists/*

# Copy dynolog binary and prometheus-cpp shared libs
COPY --from=builder /src/dynolog/build/dynolog/src/dynolog /usr/local/bin/dynolog
COPY --from=builder /usr/local/lib/libprometheus-cpp-*.so* /usr/local/lib/
RUN ldconfig

EXPOSE 1778

HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
    CMD wget -qO- http://localhost:1778/metrics >/dev/null 2>&1 || exit 1

ENTRYPOINT ["dynolog"]
CMD ["--enable_gpu_monitor=false", "--use_JSON=true"]