Little helper to run CNCF's k3s in Docker
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k3d/Dockerfile

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FROM golang:1.16 as builder
ARG GIT_TAG_OVERRIDE
WORKDIR /app
COPY . .
RUN make build -e GIT_TAG_OVERRIDE=${GIT_TAG_OVERRIDE} && bin/k3d version
FROM docker:20.10-dind as dind
ARG OS=linux
ARG ARCH=amd64
# install some basic packages needed for testing, etc.
RUN echo "building for ${OS}/${ARCH}" && \
apk update && \
apk add bash curl sudo jq git make netcat-openbsd
# install kubectl to interact with the k3d cluster
RUN curl -L https://storage.googleapis.com/kubernetes-release/release/`curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt`/bin/${OS}/${ARCH}/kubectl -o /usr/local/bin/kubectl && \
chmod +x /usr/local/bin/kubectl
# install yq (yaml processor) from source, as the busybox yq had some issues
RUN curl -L https://github.com/mikefarah/yq/releases/download/v4.9.6/yq_${OS}_${ARCH} -o /usr/bin/yq &&\
chmod +x /usr/bin/yq
COPY --from=builder /app/bin/k3d /bin/k3d
FROM scratch as binary-only
COPY --from=builder /app/bin/k3d /bin/k3d
ENTRYPOINT ["/bin/k3d"]