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Allow listening on privileged ports (below 1024) as non-root

This is done by running `setcap cap_net_bind_service=+ep` on the executable
in the build stage (doing it in the runtime stage creates an extra copy of
the executable that bloats the image). This only works when using the
BuildKit-based builder, since the `COPY` instruction doesn't copy
capabilities on the legacy builder.
This commit is contained in:
Jeremy Lin 2023-01-18 21:50:29 -08:00
parent 686474f815
commit a2162f4d69
No known key found for this signature in database
17 changed files with 163 additions and 156 deletions

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@ -29,8 +29,6 @@ FROM vaultwarden/web-vault@sha256:d5f71fb05c4b87935bf51d84140db0f8716cabfe2974fb
########################## BUILD IMAGE ##########################
FROM rust:1.66-bullseye as build
# Build time options to avoid dpkg warnings and help with reproducible builds.
ENV DEBIAN_FRONTEND=noninteractive \
LANG=C.UTF-8 \
@ -39,25 +37,24 @@ ENV DEBIAN_FRONTEND=noninteractive \
CARGO_HOME="/root/.cargo" \
USER="root"
# Create CARGO_HOME folder and don't download rust docs
RUN --mount=type=cache,target=/root/.cargo/git --mount=type=cache,target=/root/.cargo/registry mkdir -pv "${CARGO_HOME}" \
&& rustup set profile minimal
#
# Install required build libs for arm64 architecture.
# Install build dependencies for the arm64 architecture
RUN dpkg --add-architecture arm64 \
&& apt-get update \
&& apt-get install -y \
--no-install-recommends \
libssl-dev:arm64 \
gcc-aarch64-linux-gnu \
libc6-dev:arm64 \
libpq5:arm64 \
libpq-dev:arm64 \
libmariadb3:arm64 \
libcap2-bin \
libmariadb-dev:arm64 \
libmariadb-dev-compat:arm64 \
gcc-aarch64-linux-gnu \
libmariadb3:arm64 \
libpq-dev:arm64 \
libpq5:arm64 \
libssl-dev:arm64 \
#
# Make sure cargo has the right target config
&& echo '[target.aarch64-unknown-linux-gnu]' >> "${CARGO_HOME}/config" \
@ -70,7 +67,6 @@ ENV CC_aarch64_unknown_linux_gnu="/usr/bin/aarch64-linux-gnu-gcc" \
OPENSSL_INCLUDE_DIR="/usr/include/aarch64-linux-gnu" \
OPENSSL_LIB_DIR="/usr/lib/aarch64-linux-gnu"
# Creates a dummy project used to grab dependencies
RUN USER=root cargo new --bin /app
WORKDIR /app
@ -102,6 +98,12 @@ RUN touch src/main.rs
# your actual source files being built
RUN --mount=type=cache,target=/root/.cargo/git --mount=type=cache,target=/root/.cargo/registry cargo build --features ${DB} --release --target=aarch64-unknown-linux-gnu
# Add the `cap_net_bind_service` capability to allow listening on
# privileged (< 1024) ports even when running as a non-root user.
# This is only done if building with BuildKit; with the legacy
# builder, the `COPY` instruction doesn't carry over capabilities.
RUN setcap cap_net_bind_service=+ep target/aarch64-unknown-linux-gnu/release/vaultwarden
######################## RUNTIME IMAGE ########################
# Create a new stage with a minimal image
# because we already have a binary built
@ -117,11 +119,11 @@ RUN [ "cross-build-start" ]
RUN mkdir /data \
&& apt-get update && apt-get install -y \
--no-install-recommends \
openssl \
ca-certificates \
curl \
libmariadb-dev-compat \
libpq5 \
openssl \
&& apt-get clean \
&& rm -rf /var/lib/apt/lists/*