Create image using docker for rust application - docker

Question

I have created the rust application, i would like to dockerize my application. Below is my Dockerfile code, it is from reference. I am having trouble in creating image, I am getting error as below mention.In my local my-app project folder, I have cargo.toml which does not contain any package name its contains only work-space below is reference. Please help on this.
error: failed to read /home/rust/src/my-app/config/Cargo.toml
FROM ekidd/rust-musl-builder:stable as builder
RUN USER=root cargo new --bin my-app
WORKDIR ./my-app
COPY ./Cargo.lock ./Cargo.lock
COPY ./Cargo.toml ./Cargo.toml
RUN cargo build --release
RUN rm src/*.rs
ADD . ./
RUN rm ./target/x86_64-unknown-linux-musl/release/deps/my-app*
RUN cargo build --release
FROM alpine:latest
ARG APP=/usr/src/app
EXPOSE 8000
ENV TZ=Etc/UTC \
APP_USER=appuser
RUN addgroup -S $APP_USER \
&& adduser -S -g $APP_USER $APP_USER
RUN apk update \
&& apk add --no-cache ca-certificates tzdata \
&& rm -rf /var/cache/apk/*
COPY --from=builder /home/rust/src/my-app/target/x86_64-unknown-linux-musl/release/rust-docker-web ${APP}/my-app
RUN chown -R $APP_USER:$APP_USER ${APP}
USER $APP_USER
WORKDIR ${APP}
CMD ["./my-app"]
cargo.toml
[workspace]
members = [
"abcd",
"efgh"
"ijkl"
]
After adding the package name in config.toml, i am facing error
Caused by:
no targets specified in the manifest
either src/lib.rs, src/main.rs, a [lib] section, or [[bin]] section must be present

Answer 1

The name and version keys are required by Cargo to build your application. Adding those should fix the issue:
[package]
name = "foo"
version = "0.1.0"
[workspace]
members = [
"abcd",
"efgh"
"ijkl"
]
Just a heads up, although the edition key is not required, if not specified, cargo will default to compiling your application with Rust 2015 Edition instead of the newer 2018 Edition. You should probably specify your Rust edition (even if you are using the 2015 Edition), to avoid any confusion:
[package]
edition = "2018"