dragonfly/tools/packaging/Dockerfile.ubuntu-dev
Roman Gershman cec3659b51
fix: named volume permissions in docker (#3518)
Fixes #2917

The problem is described in this "working as intended" issue https://github.com/moby/moby/issues/3124
So the advised approach of using "USER dfly" directive does not really work because it requires
that the host will also define 'dfly' user with the same id. It's unrealistic expectation.

Therefore, we revert the fix done in #1775 and follow valkey approach:
https://github.com/valkey-io/valkey-container/blob/mainline/docker-entrypoint.sh#L12

1. we run the entrypoint in the container as root which later spawns the dragonfly process
2. if we run as root:
   a. we chmod files under /data to dfly.
   b. use setpriv to exec ourselves as dfly.
3. if we do not run as root we execute the docker command.

So even though the process starts as root, the server runs as dfly and only the bootstrap
part has elevated permissions is used to fix the volume access.

While we are at it, we also switched to setpriv following the change of https://github.com/valkey-io/valkey-container/pull/24/files

Signed-off-by: Roman Gershman <roman@dragonflydb.io>
2024-08-22 11:33:29 +03:00

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Docker

# syntax=docker/dockerfile:1
FROM ghcr.io/romange/ubuntu-dev:20 as builder
WORKDIR /build
COPY ./Makefile ./CMakeLists.txt ./
COPY src ./src
COPY cmake ./cmake
COPY helio ./helio
RUN make release
RUN build-release/dragonfly --version
FROM ubuntu:22.04
RUN --mount=type=tmpfs,target=/var/cache/apt \
--mount=type=tmpfs,target=/var/lib/apt/lists \
apt update && \
apt install -q -y --no-install-recommends netcat-openbsd ca-certificates redis-tools net-tools
RUN groupadd -r -g 999 dfly && useradd -r -g dfly -u 999 dfly
RUN mkdir /data && chown dfly:dfly /data
VOLUME /data
WORKDIR /data
COPY tools/docker/entrypoint.sh /usr/local/bin/entrypoint.sh
COPY tools/docker/healthcheck.sh /usr/local/bin/healthcheck.sh
COPY --from=builder /build/build-release/dragonfly /usr/local/bin/
HEALTHCHECK CMD /usr/local/bin/healthcheck.sh
ENTRYPOINT ["entrypoint.sh"]
# For inter-container communication.
EXPOSE 6379
CMD ["dragonfly", "--logtostderr"]