[Chapter 8] kubectl proxy image using arm64 architecture

[stae1102]

kubernetes-in-action/Chapter08/kubectl-proxy/Dockerfile

Lines 1 to 4 in d15844a

	FROM alpine
	RUN apk update && apk add curl && curl -L -O https://dl.k8s.io/v1.8.0/kubernetes-client-linux-amd64.tar.gz && tar zvxf kubernetes-client-linux-amd64.tar.gz kubernetes/client/bin/kubectl && mv kubernetes/client/bin/kubectl / && rm -rf kubernetes && rm -f kubernetes-client-linux-amd64.tar.gz
	ADD kubectl-proxy.sh /kubectl-proxy.sh
	ENTRYPOINT /kubectl-proxy.sh

The Dockerfile above does not work on an arm64 cpu environment.

So I replaced line 2 with the code below.

RUN apk update && apk add curl && curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/arm64/kubectl" && chmod 700 kubectl && mv kubectl /