SubOptimal
commented
1 year ago Probably your Docker version does not support the BuiltKit builder (buildx).
You can make a quick check with following Dockerfile (example for Building multi-platform images)
FROM --platform=$BUILDPLATFORM golang:alpine AS build
ARG TARGETPLATFORM
ARG BUILDPLATFORM
RUN echo "I am running on $BUILDPLATFORM, building for $TARGETPLATFORM" > /log
FROM alpine
COPY --from=build /log /logBuild docker image.
$ docker version
Client: Docker Engine - Community
Version: 23.0.1
API version: 1.42
Go version: go1.19.5
Git commit: a5ee5b1
...
$ docker build --tag local/multi-arch:demo .
[+] Building 1.0s (9/9) FINISHED
=> [internal] load .dockerignore 0.0s
=> => transferring context: 2B 0.0s
=> [internal] load build definition from Dockerfile 0.0s
=> => transferring dockerfile: 249B 0.0s
=> [internal] load metadata for docker.io/library/alpine:latest 0.0s
=> [internal] load metadata for docker.io/library/golang:alpine 0.9s
=> [stage-1 1/2] FROM docker.io/library/alpine 0.0s
=> [build 1/2] FROM docker.io/library/golang:alpine@sha256:87d0a3309b34e2ca732efd69fb899d3c420d3382370fd6e7e6d2cb5c930f27f9 0.0s
=> CACHED [build 2/2] RUN echo "I am running on linux/amd64, building for linux/amd64" > /log 0.0s
=> CACHED [stage-1 2/2] COPY --from=build /log /log 0.0s
=> exporting to image 0.0s
=> => exporting layers 0.0s
=> => writing image sha256:b83dc9576d6391bea082b79f8bce05d85607034a3fb508dfa9b8f1107189e1d7 To solve the issue for you, either remove --platform=$BUILDPLATFORM from the Dockerfile or install a Docker version with BuiltKit support.
iainelder
Following the instructions in the README, I get following error: