Dockerfile.pgctld

# =========================================================================
# Stage 1: Build pgctld
# =========================================================================
FROM golang:1.25-alpine AS builder

WORKDIR /src

RUN apk add --no-cache git=2.52.0-r0 make=4.4.1-r3 bash=5.3.3-r1

COPY go.mod go.sum ./
RUN go mod download

COPY . .
RUN make build-release

# =========================================================================
# Stage 2: Final PostgreSQL + pgctld
# =========================================================================
FROM postgres:17.7

# Install pgBackRest from PostgreSQL APT repository and procps
RUN apt-get update && \
    apt-get install -y --no-install-recommends \
    ca-certificates \
    curl \
    gnupg \
    lsb-release && \
    curl -fsSL https://www.postgresql.org/media/keys/ACCC4CF8.asc | gpg --dearmor -o /usr/share/keyrings/postgresql-archive-keyring.gpg && \
    echo "deb [signed-by=/usr/share/keyrings/postgresql-archive-keyring.gpg] http://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list && \
    apt-get update && \
    apt-cache policy pgbackrest && \
    apt-get install -y --no-install-recommends \
    pgbackrest \
    procps && \
    pgbackrest version && \
    apt-get remove -y ca-certificates curl gnupg lsb-release && \
    apt-get autoremove -y && \
    rm -rf /var/lib/apt/lists/*

# Copy pgctld binary
COPY --from=builder /src/bin/pgctld /usr/local/bin/

# Ensure pgctld is executable
RUN chmod +x /usr/local/bin/pgctld

# PostgreSQL data directory (default)
ENV PGDATA=/var/lib/postgresql/data

# Expose PostgreSQL port
EXPOSE 5432

# Health check - verify pgctld is available (PostgreSQL may not always be running)
HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
    CMD pgctld --version || exit 1

# Use postgres user (default in postgres image)
USER postgres

# Override the default PostgreSQL entrypoint
# Keep container running without launching anything - allows external control
ENTRYPOINT ["tail"]
CMD ["-f", "/dev/null"]