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Required for storing images without Microsoft baselayers on WCOW daemons (i.e. buildpackages) Adds the bcdhive_gen generator for the creation of BCD file, which uses that hivex library which has tricky run-time dependencies on darwin - Replaces testhelper with implementation Signed-off-by: Micah Young <[email protected]>
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Micah Young
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Oct 12, 2020
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,85 @@ | ||
| package layer | ||
|
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||
| import ( | ||
| "archive/tar" | ||
| "bytes" | ||
| "io" | ||
| ) | ||
|
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| // Generate using `make generate` | ||
| //go:generate docker run --rm -v $PWD:/out/ bcdhive-generator -file=/out/layer/bcdhive_generated.go -package=layer -func=BaseLayerBCD | ||
|
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| // Windows base layers must follow this pattern: | ||
| // \-> UtilityVM/Files/EFI/Microsoft/Boot/BCD (file must exist and a valid BCD format - from bcdhive_gen) | ||
| // \-> Files/Windows/System32/config/DEFAULT (file and must exist but can be empty) | ||
| // \-> Files/Windows/System32/config/SAM (file must exist but can be empty) | ||
| // \-> Files/Windows/System32/config/SECURITY (file must exist but can be empty) | ||
| // \-> Files/Windows/System32/config/SOFTWARE (file must exist but can be empty) | ||
| // \-> Files/Windows/System32/config/SYSTEM (file must exist but can be empty) | ||
| // Refs: | ||
| // https://github.com/microsoft/hcsshim/blob/master/internal/wclayer/legacy.go | ||
| // https://github.com/moby/moby/blob/master/daemon/graphdriver/windows/windows.go#L48 | ||
| func WindowsBaseLayer() (io.Reader, error) { | ||
| bcdBytes, err := BaseLayerBCD() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| layerBuffer := &bytes.Buffer{} | ||
| tw := tar.NewWriter(layerBuffer) | ||
|
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| _ = bcdBytes | ||
| if err := tw.WriteHeader(&tar.Header{Name: "UtilityVM", Typeflag: tar.TypeDir}); err != nil { | ||
| return nil, err | ||
| } | ||
| if err := tw.WriteHeader(&tar.Header{Name: "UtilityVM/Files", Typeflag: tar.TypeDir}); err != nil { | ||
| return nil, err | ||
| } | ||
| if err := tw.WriteHeader(&tar.Header{Name: "UtilityVM/Files/EFI", Typeflag: tar.TypeDir}); err != nil { | ||
| return nil, err | ||
| } | ||
| if err := tw.WriteHeader(&tar.Header{Name: "UtilityVM/Files/EFI/Microsoft", Typeflag: tar.TypeDir}); err != nil { | ||
| return nil, err | ||
| } | ||
| if err := tw.WriteHeader(&tar.Header{Name: "UtilityVM/Files/EFI/Microsoft/Boot", Typeflag: tar.TypeDir}); err != nil { | ||
| return nil, err | ||
| } | ||
|
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| if err := tw.WriteHeader(&tar.Header{Name: "UtilityVM/Files/EFI/Microsoft/Boot/BCD", Size: int64(len(bcdBytes)), Mode: 0644}); err != nil { | ||
| return nil, err | ||
| } | ||
| if _, err := tw.Write(bcdBytes); err != nil { | ||
| return nil, err | ||
| } | ||
|
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| if err := tw.WriteHeader(&tar.Header{Name: "Files", Typeflag: tar.TypeDir}); err != nil { | ||
| return nil, err | ||
| } | ||
| if err := tw.WriteHeader(&tar.Header{Name: "Files/Windows", Typeflag: tar.TypeDir}); err != nil { | ||
| return nil, err | ||
| } | ||
| if err := tw.WriteHeader(&tar.Header{Name: "Files/Windows/System32", Typeflag: tar.TypeDir}); err != nil { | ||
| return nil, err | ||
| } | ||
| if err := tw.WriteHeader(&tar.Header{Name: "Files/Windows/System32/config", Typeflag: tar.TypeDir}); err != nil { | ||
| return nil, err | ||
| } | ||
|
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||
| if err := tw.WriteHeader(&tar.Header{Name: "Files/Windows/System32/config/DEFAULT", Size: 0, Mode: 0644}); err != nil { | ||
| return nil, err | ||
| } | ||
| if err := tw.WriteHeader(&tar.Header{Name: "Files/Windows/System32/config/SAM", Size: 0, Mode: 0644}); err != nil { | ||
| return nil, err | ||
| } | ||
| if err := tw.WriteHeader(&tar.Header{Name: "Files/Windows/System32/config/SECURITY", Size: 0, Mode: 0644}); err != nil { | ||
| return nil, err | ||
| } | ||
| if err := tw.WriteHeader(&tar.Header{Name: "Files/Windows/System32/config/SOFTWARE", Size: 0, Mode: 0644}); err != nil { | ||
| return nil, err | ||
| } | ||
| if err := tw.WriteHeader(&tar.Header{Name: "Files/Windows/System32/config/SYSTEM", Size: 0, Mode: 0644}); err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return layerBuffer, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,14 @@ | ||
| FROM golang:1.15-buster | ||
|
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| RUN apt update \ | ||
| && apt install -y libhivex-dev libhivex-bin libwin-hivex-perl | ||
|
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| COPY . /src | ||
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| WORKDIR /src | ||
|
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| RUN go generate ./ \ | ||
| && go test -parallel=1 -count=1 -v . \ | ||
| && go install . | ||
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| ENTRYPOINT ["/go/bin/bcdhive_gen"] |
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