FROM docker.io/library/rust:1.88-alpine AS build

RUN apk --no-cache add musl-dev

WORKDIR /src

COPY . .

RUN cargo build --release --locked

RUN strip target/release/k8s-reboot-coordinator


FROM docker.io/library/busybox

COPY --from=build /src/target/release/k8s-reboot-coordinator /

ENV REBOOT_SENTINEL=/host/run/reboot-needed

ENTRYPOINT ["/k8s-reboot-coordinator"]

CMD ["nsenter", "-t", "1", "-m", "-n", "/bin/systemctl", "reboot", "--when", "+5 min"]