Dockerfile

# Image that provides cross compilation tooling.
FROM --platform=$BUILDPLATFORM rancher/mirrored-tonistiigi-xx:1.3.0 as xx

FROM --platform=$BUILDPLATFORM registry.suse.com/bci/golang:1.21 as helm

# Clone repository once, and reuse it for target archs.
ARG HELM_VERSION
ADD --keep-git-dir=true https://github.com/rancher/helm.git#${HELM_VERSION} /helm
RUN cd /helm && go mod download

COPY --from=xx / /

# Cross-compile instead of emulating the compilation on the target arch.
ARG TARGETPLATFORM
RUN xx-go --wrap && mkdir -p /run/lock
RUN make -C /helm

RUN xx-verify --static /helm/bin/helm

FROM --platform=$BUILDPLATFORM registry.suse.com/bci/bci-base:15.5 AS build
RUN zypper -n install curl gzip tar

# Define build arguments
ARG KUBECTL_VERSION KUBECTL_SUM_arm64 KUBECTL_SUM_amd64 KUBECTL_SUM_s390x \
    KUSTOMIZE_VERSION KUSTOMIZE_SUM_arm64 KUSTOMIZE_SUM_amd64 KUSTOMIZE_SUM_s390x \
    K9S_VERSION K9S_SUM_arm64 K9S_SUM_amd64 K9S_SUM_s390x

ARG TARGETARCH
# Stage kubectl into build
ADD --chown=root:root --chmod=0755 \
    "https://dl.k8s.io/release/${KUBECTL_VERSION}/bin/linux/${TARGETARCH}/kubectl" \
    /kubectl

ENV KUBECTL_SUM="KUBECTL_SUM_${TARGETARCH}"
RUN echo "${!KUBECTL_SUM}  /kubectl" | sha256sum -c -

# Stage kubectl into build
ENV KUSTOMIZE_SUM="KUSTOMIZE_SUM_${TARGETARCH}"
RUN curl --output /tmp/kustomize.tar.gz -sLf "https://github.com/kubernetes-sigs/kustomize/releases/download/kustomize/${KUSTOMIZE_VERSION}/kustomize_${KUSTOMIZE_VERSION}_linux_${TARGETARCH}.tar.gz" && \
    echo "${!KUSTOMIZE_SUM}  /tmp/kustomize.tar.gz" | sha256sum -c - && \
    tar -xvzf /tmp/kustomize.tar.gz -C / kustomize

# Stage k9s into build
ENV K9S_SUM="K9S_SUM_${TARGETARCH}"
RUN curl --output /tmp/k9s.tar.gz -sLf "https://github.com/derailed/k9s/releases/download/${K9S_VERSION}/k9s_Linux_${TARGETARCH}.tar.gz" && \
    echo "${!K9S_SUM}  /tmp/k9s.tar.gz" | sha256sum -c - && \
    tar -xvzf /tmp/k9s.tar.gz -C / k9s 

FROM registry.suse.com/bci/bci-base:15.5 as final
RUN zypper -n update && \
    zypper -n install bash-completion gzip jq tar unzip vim wget && \
    zypper clean -a && rm -rf /tmp/* /var/tmp/* /usr/share/doc/packages/* /usr/share/doc/manual/* /var/log/*
RUN echo 'shell:x:1000:1000:shell,,,:/home/shell:/bin/bash' > /etc/passwd && \
    echo 'shell:x:1000:' > /etc/group && \
    mkdir /home/shell && \
    echo '. /etc/profile.d/bash_completion.sh' >> /home/shell/.bashrc && \
    echo 'alias k="kubectl"' >> /home/shell/.bashrc && \
    echo 'alias ks="kubectl -n kube-system"' >> /home/shell/.bashrc && \
    echo 'source <(kubectl completion bash)' >> /home/shell/.bashrc && \
    echo 'complete -o default -F __start_kubectl k' >> /home/shell/.bashrc && \
    echo 'PS1="> "' >> /home/shell/.bashrc && \
    mkdir /home/shell/.kube && \
    chown -R shell /home/shell && \
    chmod 700 /run

COPY --chown=root:root --chmod=0755 --from=helm /helm/bin/helm /usr/local/bin/
COPY --chown=root:root --chmod=0755 --from=build /kubectl /k9s /kustomize* /usr/local/bin/
COPY --chown=root:root --chmod=0755 package/helm-cmd package/welcome /usr/local/bin/
COPY --chown=1000:1000 --chmod=0755 package/kustomize.sh /home/shell/

USER 1000

WORKDIR /home/shell
CMD ["welcome"]