Restic + Rclone for ARM

README.md

Cross compile this with ARM (+ an AMD image) and Docker Buildkit:

# Prepare
docker buildx create --name xbuilder
docker buildx use xbuilder
docker buildx inspect --bootstrap

# Build
docker buildx build -f Dockerfile --platform linux/arm/v7,linux/amd64 --progress plain --push -t rhuss/restic:0.9.6 .

Of course, adapt the final image name to push. Takes a bit (> 10 mins) but then you have a nice image for backing up your k3s local persistent volumes on your raspi cluster ;-)

Dockerfile

FROM golang:1.13.10-buster AS builder

ARG VERSION_RESTIC=v0.9.6
ARG VERSION_RCLONE=v1.51.0

WORKDIR /opt

RUN apt-get update \
 && apt-get install -y \
       git \
       make

RUN git clone https://github.com/rclone/rclone.git \
 && cd rclone \
 && git checkout $VERSION_RCLONE -b $VERSION_RCLONE \
 && CGO_ENABLED=0 make \
 && ./rclone version \
 && cd ..

RUN git clone https://github.com/restic/restic.git \
 && cd restic \
 && git checkout $VERSION_RESTIC -b $VERSION_RESTIC \
 && go run build.go \
 && ./restic version \
 && cd ..

FROM alpine:3.11
WORKDIR /
COPY --from=builder /opt/restic/restic /usr/bin/restic
COPY --from=builder /opt/rclone/rclone /usr/bin/rclone

ENTRYPOINT ["/usr/bin/restic"]