Rust Docker Examples

This code is a series of examples of Rust being used inside of Docker containers.

Pre-requisites

Install Docker: https://docs.docker.com/install/ (For some examples)
Install Rust and Cargo: https://www.rust-lang.org/tools/install

01-hello-world

Before we build a microservice, we must first containerize!

Simple Hello World (non-Docker)

In this directory you'll find a file in src/ called main.rs

To run without docker, build:
cargo build --release
and run:
./target/release/hello-world

Now we will containerize and run the exact same sets of commands inside of a container

Simple Hello World (with Docker)

In the 01-hello-world directory to build:
docker build -t hello-world-rust .
and then to run:
docker run -it hello-world-rust

02-hello-world-distroless

Distroless is a safe and lightweight way to run your container images, to do this we will use the following Dockerfile (also in 02-hello-world-distroless:

FROM rust:1.41.0 as build-env
WORKDIR /app
ADD . /app
RUN cargo build --release

FROM gcr.io/distroless/cc
COPY --from=build-env /app/target/release/hello-world-distroless /
CMD ["./hello-world-distroless"]

Here we can see the first stage runs up until cargo build --release, after that we grab the distroless/cc image which is the base image of distroless plus libgcc1 and its dependencies and add the /target/release directory. From there we run the new binary.
The same commands above will help us build and run this image:
Build:
docker build -t hello-world-rust-distroless .
Run:
docker run -it hello-world-rust