Dockerfile

FROM alpine:3.10 as build
LABEL maintainer="Mario Siegenthaler <mario.siegenthaler@linkyard.ch>"

RUN apk add --update --no-cache ca-certificates git

ENV VERSION=v3.0.0
ENV FILENAME=helm-${VERSION}-linux-amd64.tar.gz
ENV SHA256SUM=10e1fdcca263062b1d7b2cb93a924be1ef3dd6c381263d8151dd1a20a3d8c0dc

WORKDIR /

RUN apk add --update -t deps curl tar gzip
RUN curl -L https://get.helm.sh/${FILENAME} > ${FILENAME} && \
    echo "${SHA256SUM}  ${FILENAME}" > helm_${VERSION}_SHA256SUMS && \
    sha256sum -cs helm_${VERSION}_SHA256SUMS && \
    tar zxv -C /tmp -f ${FILENAME} && \
    rm -f ${FILENAME}


# The image we keep
FROM alpine:3.10

RUN apk add --update --no-cache git ca-certificates

COPY --from=build /tmp/linux-amd64/helm /bin/helm

ENTRYPOINT ["/bin/helm"]