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https://github.com/goreleaser/goreleaser.git
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f6615b138b
This PR corrects grammar mistakes in documentation: - artefacts -> artifacts - Dockefile -> Dockerfile - compliation -> compilation - gorleaser -> goreleaser - repositores -> repositories - succesfull -> successful
78 lines
2.1 KiB
Markdown
78 lines
2.1 KiB
Markdown
# Docker build failures
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## `COPY failed: file not found in build context`
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This usually happens when trying to build the binary again from source code in
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the Docker image build process.
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The way GoReleaser works, the correct binary for the platform you're building
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should be already available, so you don't need to build it again and can still
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reuse the `Dockerfile`.
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Another common misconception is trying to copy the binary as if the context is
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the repository root.
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It's not.
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It's always a new temporary build context with the artifacts you can use in
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its root, so you can just `COPY binaryname /bin/binaryname` and etc.
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Below you can find some **don'ts** as well as what you should **do**.
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## `expected to find X artifacts for ids [id1 id2], found Y`
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The `ids` property in the Dockers configuration tells GoReleaser which build IDs
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to include.
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You need to remove IDs that don't exist and/or don't build for the architecture
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of the image being built.
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Leaving it empty is also fine if you don't need any binaries.
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## `use docker --context=default buildx to switch to context "default"`
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The "default" context is a built-in context in "docker buildx", and it is automatically created. This context typically points to the local Docker environment and is used by default for building images. It has to be active for `goreleaser` to build images with "buildx".
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You can switch to the default context using `docker context use default`.
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This change should be persistent.
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### Don't
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Build the binary again.
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```dockerfile
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FROM golang AS builder
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WORKDIR /app
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COPY cmd ./cmd
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COPY go.mod ./
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COPY *.go ./
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RUN GOOS=linux GOARCH=amd64 go build -ldflags="-w -s" -o app .
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FROM scratch
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COPY --from=builder /app/app /app
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ENTRYPOINT ["/app"]
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```
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### Don't
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Copy from the `dist` directory.
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```dockerfile
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FROM scratch
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COPY /dist/app_linux_amd64/app /app
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ENTRYPOINT ["/app"]
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```
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### Do
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Copy the clean file names from the root.
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```dockerfile
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FROM scratch
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COPY app /app
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ENTRYPOINT ["/app"]
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```
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!!! tip
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If you still want your users to be able to `docker build` without an extra
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step, you can have a `Dockerfile` just for GoReleaser, for example, a
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`goreleaser.dockerfile`.
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