FROM lukemathwalker/cargo-chef:latest-rust-1.87.0 AS chef
WORKDIR app
FROM chef AS planner
COPY . .
RUN cargo chef prepare --recipe-path recipe.json
FROM chef AS builder
COPY --from=planner /app/recipe.json recipe.json
# Build dependencies - this is the caching Docker layer!
RUN cargo chef cook --release --recipe-path recipe.json --target=x86_64-unknown-linux-musl
# Build application
COPY . .
RUN cargo build --release --target=x86_64-unknown-linux-musl --bin app
# We do not need the Rust toolchain to run the binary!
FROM rust:1.87-alpine AS runtime
WORKDIR app
COPY --from=builder /app/target/release/<my-app> /usr/local/bin
CMD ["/usr/local/bin/<my-app>"]Sources
After doing some trial and error myself, I found this blog post that was very interesting Why is the Rust compiler so slow?. Most of it is not relevant, but it did expose me to cargo-chef which is an important part of the final dockerfile. This post from Luca Palmieri ”5x Faster Rust Docker Builds with cargo-chef” helped me get the final dockerfile setup.