How deeply does Rust Servers, Services, and Apps cover multistage build?

Explains multiple FROM stages, named stages, artifact copying, image-size verification, runtime testing, and security and caching benefits.

Multistage build

As explained in Rust Servers, Services, and Apps

A multistage Docker build uses multiple Dockerfile stages so that only selected artifacts from earlier stages are included in the final image.

A multistage Docker build uses multiple FROM stages to separate compilation from runtime packaging. Named stages let the final image copy only selected artifacts from an earlier stage, excluding compilers and intermediate files. section 12.2.3 section 12.6

Rust release image

Build the release binary with the Rust image, then use a Google Distroless runtime image and copy /app/target/release/docker-rust into it. Build with Dockerfile-lite, run docker-rust-lite on port 8080, and verify the greeting endpoints. The resulting image is reported as 31.8 MB. section 12.2.3

# Use the main rust Docker image
FROM rust as build
 
# copy app into Docker image
COPY . /app
 
# Set the workdirectory
WORKDIR /app
 
# build the app
RUN cargo build --release
 
# use google distroless as runtime image
FROM gcr.io/distroless/cc-debian11
 
# copy app from builder
COPY --from=build /app/target/release/docker-rust /app/docker-rust
WORKDIR /app
 
# start the application
CMD ["./docker-rust"]

Shows the complete two-stage Dockerfile, including the builder stage, release compilation, runtime image, artifact copy, and startup command. section 12.2.3

How Rust Servers, Services, and Apps covers it

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Also explained in

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.NET in Action, Second EditionA multistage build constructs an image through multiple Dockerfile build stages so that artifacts from an earlier stage can be copied into a later runtime stage.

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Related concepts

Dockerfileuses · A Dockerfile is a text file containing declarative instructions for building a container image and specifying its contents and runtime metadata.
container imageproduces · A container image is a packaged filesystem and configuration artifact from which a container can be created and run.
from instructionuses · The FROM instruction is a Dockerfile directive that selects the base image or empty filesystem for a container image build stage.
Dockerimplemented by · Docker is a platform and ecosystem for building, distributing, and running applications in containers.
code compilationuses · Code compilation is the translation of source code or another formal representation into an executable, intermediate, or lower-level representation.
software artifactproduces · A software artifact is a persistent work product or object produced or maintained during software development or a related workflow.

This explainer was generated by Manning's knowledge graph from the text of Rust Servers, Services, and Apps. The section links point to the parts of the book it draws on.