Image Overview: zig
Overview: zig Chainguard Image
Minimal image with zig binary.
Get It!
The image is available on cgr.dev:
docker pull cgr.dev/chainguard/zig:latest
This image should be used to build and test zig applications. You should not use it as a runtime image.
For runtime images, you can use cgr.dev/chainguard/static or cgr.dev/chainguard/glibc-dynamic depending on the type of zig application you build.
Run It!
The zig tool in this image can be used to setup and build basic zig projects:
$ docker run -it -v $(pwd):/app -w /app cgr.dev/chainguard/zig init-exe
info: Created build.zig
info: Created src/main.zig
info: Next, try `zig build --help` or `zig build run`
$ docker run -it -v $(pwd):/app -w /app cgr.dev/chainguard/zig build run
$ docker run -it -v $(pwd):/app -w /app cgr.dev/chainguard/zig build run
All your codebase are belong to us.
Run `zig build test` to run the tests.
It can also be used in a mutli-stage build:
FROM cgr.dev/chainguard/zig:latest-dev as builder
COPY --chown=nonroot . /app
WORKDIR /app
RUN zig build
FROM cgr.dev/chainguard/static
COPY --from=builder /app/zig-out/bin/app /usr/local/bin/app
CMD ["/usr/local/bin/app"]
$ cat << EOF > Dockerfile
FROM cgr.dev/chainguard/zig:latest-dev as builder
WORKDIR /app
COPY . /app
RUN zig build
FROM cgr.dev/chainguard/static
COPY --from=builder /app/zig-out/bin/app /usr/local/bin/app
CMD ["/usr/local/bin/app"]
EOF
$ docker build . -t zigtest
[+] Building 0.4s (12/12) FINISHED
=> [internal] load .dockerignore 0.0s
=> => transferring context: 2B 0.0s
=> [internal] load build definition from Dockerfile 0.0s
=> => transferring dockerfile: 305B 0.0s
=> [internal] load metadata for cgr.dev/chainguard/static:latest 0.3s
=> [internal] load metadata for cgr.dev/chainguard/zig:latest-dev 0.2s
=> [internal] load build context 0.0s
=> => transferring context: 1.40kB 0.0s
=> [stage-1 1/2] FROM cgr.dev/chainguard/static@sha256:54b589146d4dbc80a094fcbcd6b09414f3df94cde8ea6d31c44fd02692c58203 0.0s
=> => resolve cgr.dev/chainguard/static@sha256:54b589146d4dbc80a094fcbcd6b09414f3df94cde8ea6d31c44fd02692c58203 0.0s
=> [builder 1/4] FROM cgr.dev/chainguard/zig:latest-dev@sha256:74d1fd19ab5f32a350745c155deaf26684733ac20392e8ca38648bcd0f73db54 0.0s
=> => resolve cgr.dev/chainguard/zig:latest-dev@sha256:74d1fd19ab5f32a350745c155deaf26684733ac20392e8ca38648bcd0f73db54 0.0s
=> CACHED [builder 2/4] COPY --chown=nonroot . /app 0.0s
=> CACHED [builder 3/4] WORKDIR /app 0.0s
=> CACHED [builder 4/4] RUN zig build 0.0s
=> CACHED [stage-1 2/2] COPY --from=builder /app/zig-out/bin/app /usr/local/bin/app 0.0s
=> exporting to image 0.0s
=> => exporting layers 0.0s
=> => exporting manifest sha256:b2b46fa2142a0a74b56531f700b9052326e19d8f73d576583af26803bf6a32f0 0.0s
=> => exporting config sha256:5f75e89de21e888ce46efef85a14919c0499ef854ed78f0bc9fb0126ed677cb8 0.0s
=> => naming to docker.io/library/zigtest:latest 0.0s
=> => unpacking to docker.io/library/zigtest:latest
$ docker run zigtest
Run `zig build test` to run the tests.
All your codebase are belong to us.
WASM
Zig can also be used to build WASM modules.
This Dockerfile can be used to build a WASM image, compatible with Docker’s WASM runtime support.
# syntax=docker/dockerfile:1
FROM cgr.dev/chainguard/zig:latest as wasm-builder
WORKDIR /app
COPY --chown=nonroot . /app
RUN zig build-exe src/main.zig -target wasm32-wasi
FROM scratch
COPY --from=wasm-builder /app/main.wasm /main.wasm
ENTRYPOINT [ "/main.wasm" ]
Follow the instructions to enable WASM in docker, then build this and run it:
$ cat << EOF > Dockerfile.wasm
# syntax=docker/dockerfile:1
FROM cgr.dev/chainguard/zig:latest as wasm-builder
WORKDIR /app
COPY --chown=nonroot . /app
RUN zig build-exe src/main.zig -target wasm32-wasi
FROM scratch
COPY --from=wasm-builder /app/main.wasm /main.wasm
ENTRYPOINT [ "/main.wasm" ]
EOF
$ docker build . -t myfirstwasmapp -f Dockerfile.wasm
$ docker run \
--runtime=io.containerd.wasmedge.v1 \
myfirstwasmapp
All your codebase are belong to us.
Run `zig build test` to run the tests.
Other WASM Runtimes
These wasm binaries can also be run in other WASM runtimes outside of Docker.
Wolfi currently packages wazero, wasmtime, and wasmer.
These can be used together. Here’s an example using Zig with Wasmer:
$ docker run -it cgr.dev/chainguard/wolfi-base sh
$ apk add zig wasmer
$ zig init-exe
$ zig build-exe src/main.zig -target wasm32-wasi
$ wasmer run main.wasm
All your codebase are belong to us.
Run `zig build test` to run the tests.
Or in a multi-stage Dockerfile:
FROM cgr.dev/chainguard/zig:latest as builder
WORKDIR /app
RUN zig init-exe
RUN zig build-exe src/main.zig -target wasm32-wasi
FROM cgr.dev/chainguard/wasmer:latest
COPY --from=builder /app/main.wasm /app/main.wasm
CMD ["run", "/app/main.wasm"]
$ cat << EOF > Dockerfile.wasmer
FROM cgr.dev/chainguard/zig:latest as builder
WORKDIR /app
RUN zig init-exe
RUN zig build-exe src/main.zig -target wasm32-wasi
FROM cgr.dev/chainguard/wasmer:latest
COPY --from=builder /app/main.wasm /app/main.wasm
CMD ["run", "/app/main.wasm"]
EOF
$ docker build -t mysecondwasmapp -f Dockerfile.wasmer .
$ docker run mysecondwasmapp
All your codebase are belong to us.
Run `zig build test` to run the tests.
Last updated: 2022-11-01 11:07