Dockerfile

FROM lukemathwalker/cargo-chef:latest-rust-1 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
# Build application
COPY . .
RUN cargo build --release

FROM gcr.io/distroless/cc:latest AS runtime
WORKDIR /app
COPY --from=builder /app/target/release/prometheus-http-exporter /app/
ENTRYPOINT ["/app/prometheus-http-exporter"]
CMD ["/config.yml"]