36 lines
1 KiB
Text
36 lines
1 KiB
Text
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# Minimal kubectl container
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# Multi-arch build: downloads correct binary for target platform
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FROM alpine:3.21 AS downloader
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ARG TARGETARCH
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ARG KUBECTL_VERSION=v1.34.1
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RUN apk add --no-cache curl && \
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# Detect architecture - use TARGETARCH if set, otherwise detect from uname
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if [ -n "$TARGETARCH" ]; then \
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ARCH="$TARGETARCH"; \
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else \
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UNAME_ARCH=$(uname -m); \
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case "$UNAME_ARCH" in \
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aarch64|arm64) ARCH="arm64" ;; \
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x86_64) ARCH="amd64" ;; \
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*) echo "Unsupported architecture: $UNAME_ARCH"; exit 1 ;; \
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esac; \
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fi && \
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echo "Downloading kubectl for $ARCH..." && \
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curl -LO "https://dl.k8s.io/release/${KUBECTL_VERSION}/bin/linux/${ARCH}/kubectl" && \
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chmod +x kubectl
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FROM alpine:3.21
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COPY --from=downloader /kubectl /usr/local/bin/kubectl
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# Add ca-certificates for HTTPS connections and bash for scripts
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RUN apk add --no-cache ca-certificates bash
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# Run as non-root
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RUN adduser -D -u 1000 kubectl
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USER kubectl
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ENTRYPOINT ["kubectl"]
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