initrd/Dockerfile
2024-01-20 16:41:54 +01:00

35 lines
923 B
Docker

from golang:1.21.6-alpine3.19 as build
workdir /src
copy . .
run \
--mount=type=cache,id=gomod,target=/go/pkg/mod \
--mount=type=cache,id=gobuild,target=/root/.cache/go-build \
go test ./... \
&& go build -o /go/bin/init -trimpath .
# ------------------------------------------------------------------------
from alpine:3.19.0 as initrd
run apk add --no-cache xz
workdir /layer
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
run apk add --no-cache -p . musl lvm2 lvm2-dmeventd udev cryptsetup e2fsprogs btrfs-progs lsblk
run rm -rf usr/share/apk var/cache/apk
copy --from=build /go/bin/init .
# check viability
run chroot /layer /init hello
run find |cpio -H newc -o >/initrd
# ------------------------------------------------------------------------
from alpine:3.19.0
copy --from=initrd /initrd /
entrypoint ["base64","/initrd"]