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Update Dockerfile to Best Practices: 

- Version pinning on Base Image
- COPY is preferred over ADD
- apk -U will leave index in image, use `--no-cache` to avoid storing repo index
- curl kubectl directly to final destination
- Change entrypoint instead of running `sh -c bash -c /bin/update.sh`
This commit is contained in:
Vincent De Smet 2017-02-20 17:53:03 +08:00
parent 4ea0a93799
commit dae5ad67d9
1 changed files with 7 additions and 8 deletions
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Dockerfile
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@ -1,8 +1,7 @@
FROM alpine
RUN apk -Uuv add curl ca-certificates bash
RUN curl -LO https://storage.googleapis.com/kubernetes-release/release/$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)/bin/linux/amd64/kubectl
RUN chmod +x ./kubectl
RUN mv ./kubectl /usr/local/bin/kubectl
ADD update.sh /bin/
RUN chmod +x /bin/update.sh
CMD bash -c /bin/update.sh
FROM alpine:3.4
RUN apk --no-cache add curl ca-certificates bash
RUN curl -o /usr/local/bin/kubectl -LO https://storage.googleapis.com/kubernetes-release/release/$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)/bin/linux/amd64/kubectl
RUN chmod +x /usr/local/bin/kubectl
COPY update.sh /bin/
ENTRYPOINT ["/bin/bash"]
CMD ["/bin/update.sh"]