Build slim rust with alpine and cargo chef

Readme.md

To create a slim rust docker image, one needs to do the following with below assumptions

• The project would generate a binary tool called ims2_tool
• Its version is annotated in clap derive API, so the script could fetch the version directly from source code.

1. Create a multi-stage docker file, see Dockerfile
2. Modify your project's Cargo.toml file so desired [[bin]] section must exist, otherwise docker build would fail during cargo prepare phase.

[[bin]]
name="<executable name>"
bench=false
test=false

3. Create a build_docker.sh to update your image easily.

build_docker.sh

#!/usr/bin/env bash
cargo clean 
version=$(cat src/cli/app.rs |  sed -n "s/.*version\s*=[^vV]*\([0-9vV.]\+\).*/\1/gp")
echo "Will build for ${version}..."
sudo docker build --build-arg http_proxy=$http_proxy --build-arg https_proxy=$https_proxy -t nsbboamfh/ims2parser:$version .
[ $? -eq 0 ] && sudo docker push nsbboamfh/ims2parser:$version

Dockerfile

FROM docker-registry-remote.artifactory-espoo1.int.net.nokia.com/rust:1.66-alpine as chef
RUN apk add --no-cache musl-dev
RUN cargo --version
RUN cargo install cargo-chef 

WORKDIR /app
FROM chef as planner
COPY Cargo.toml Cargo.lock ./
RUN cargo chef prepare --recipe-path recipe.json 

FROM chef as builder
COPY --from=planner /app/recipe.json recipe.json
COPY --from=planner /app/Cargo.toml /app/Cargo.lock ./
# Build dependencies
RUN cargo chef cook --release --recipe-path recipe.json

# Build applications
COPY src src/
RUN cargo build --release

# Deploy image
FROM docker-registry-remote.artifactory-espoo1.int.net.nokia.com/alpine:3.17 
RUN cp --from=builder /app/target/release/ims2_tool /usr/bin/
ENTRYPOINT [ "/usr/bin/ims2_tool" ]