pmb
0d5414e03d
The Alpine/musl runtime can't exec our glibc-linked binary — 'exec /usr/local/bin/finger: no such file or directory'. The recent syslog change pulls in fortify-source _chk symbols and fcntl64 that musl doesn't provide even with gcompat. Matching the runtime base to the builder (ubuntu:24.04) makes the image reliably runnable; ship netcat-openbsd for the healthcheck.
74 lines
2.0 KiB
Docker
74 lines
2.0 KiB
Docker
# Multi-stage build for C++ finger service
|
|
# Build stage - use Ubuntu with all development dependencies
|
|
FROM ubuntu:24.04 AS builder
|
|
|
|
# Avoid interactive prompts during package installation
|
|
ENV DEBIAN_FRONTEND=noninteractive
|
|
|
|
# Install build dependencies
|
|
RUN apt-get update && apt-get install -y \
|
|
build-essential \
|
|
meson \
|
|
ninja-build \
|
|
pkg-config \
|
|
libboost-all-dev \
|
|
libgtest-dev \
|
|
libgmock-dev \
|
|
&& rm -rf /var/lib/apt/lists/*
|
|
|
|
# Set working directory
|
|
WORKDIR /app
|
|
|
|
# Copy source files
|
|
COPY . .
|
|
|
|
# Build the project
|
|
RUN meson setup builddir --buildtype=release
|
|
RUN meson compile -C builddir
|
|
|
|
# Run tests to ensure quality
|
|
RUN meson test -C builddir
|
|
|
|
# Runtime stage — match builder's glibc (Alpine/musl is incompatible
|
|
# with our dynamically linked binary, esp. fortify _chk symbols).
|
|
FROM ubuntu:24.04
|
|
|
|
ENV DEBIAN_FRONTEND=noninteractive
|
|
|
|
RUN apt-get update && apt-get install -y --no-install-recommends \
|
|
libstdc++6 \
|
|
netcat-openbsd \
|
|
&& rm -rf /var/lib/apt/lists/* \
|
|
&& (userdel -r ubuntu 2>/dev/null || true) \
|
|
&& groupadd -g 1000 finger \
|
|
&& useradd -m -u 1000 -g finger -s /bin/sh finger
|
|
|
|
# Copy the compiled binary from builder stage
|
|
COPY --from=builder /app/builddir/finger /usr/local/bin/finger
|
|
|
|
# Make the binary executable
|
|
RUN chmod +x /usr/local/bin/finger
|
|
|
|
# Create the directory for user data with proper permissions
|
|
RUN mkdir -p /var/finger/users && \
|
|
chown -R finger:finger /var/finger
|
|
|
|
# Switch to non-root user
|
|
USER finger
|
|
|
|
# Expose port 79 (finger protocol)
|
|
EXPOSE 79
|
|
|
|
# Add health check
|
|
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
|
|
CMD nc -w 1 127.0.0.1 79 < /dev/null || exit 1
|
|
|
|
# Set metadata labels
|
|
LABEL org.opencontainers.image.title="finger"
|
|
LABEL org.opencontainers.image.description="A silly finger service written in C++20"
|
|
LABEL org.opencontainers.image.source="https://github.com/waffle2k/finger"
|
|
LABEL org.opencontainers.image.licenses="MIT"
|
|
|
|
# Set the binary as the default command
|
|
CMD ["finger"]
|