35 lines
923 B
Docker
35 lines
923 B
Docker
from golang:1.21.6-alpine3.19 as build
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workdir /src
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copy . .
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run \
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--mount=type=cache,id=gomod,target=/go/pkg/mod \
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--mount=type=cache,id=gobuild,target=/root/.cache/go-build \
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go test ./... \
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&& go build -o /go/bin/init -trimpath .
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# ------------------------------------------------------------------------
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from alpine:3.19.0 as initrd
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run apk add --no-cache xz
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workdir /layer
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run wget -O- https://dl-cdn.alpinelinux.org/alpine/v3.18/releases/x86_64/alpine-minirootfs-3.18.4-x86_64.tar.gz |tar zxv
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run apk add --no-cache -p . musl lvm2 lvm2-dmeventd udev cryptsetup e2fsprogs btrfs-progs lsblk
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run rm -rf usr/share/apk var/cache/apk
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copy --from=build /go/bin/init .
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# check viability
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run chroot /layer /init hello
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run find |cpio -H newc -o >/initrd
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# ------------------------------------------------------------------------
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from alpine:3.19.0
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copy --from=initrd /initrd /
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entrypoint ["base64","/initrd"]
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