Created
November 28, 2016 12:44
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Build a Dockerfile from Image
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#!/bin/bash | |
######################################################################################## | |
# This will not build a full dockerfile, but will give a good hint to how it was build # | |
######################################################################################## | |
docker history --no-trunc "$1" | \ | |
sed -n -e 's,.*/bin/sh -c #(nop) \(MAINTAINER .*[^ ]\) *0 B,\1,p' | \ | |
head -1 | |
docker inspect --format='{{range $e := .Config.Env}} | |
ENV {{$e}} | |
{{end}}{{range $e,$v := .Config.ExposedPorts}} | |
EXPOSE {{$e}} | |
{{end}}{{range $e,$v := .Config.Volumes}} | |
VOLUME {{$e}} | |
{{end}}{{with .Config.User}}USER {{.}}{{end}} | |
{{with .Config.WorkingDir}}WORKDIR {{.}}{{end}} | |
{{with .Config.Entrypoint}}ENTRYPOINT {{json .}}{{end}} | |
{{with .Config.Cmd}}CMD {{json .}}{{end}} | |
{{with .Config.OnBuild}}ONBUILD {{json .}}{{end}}' "$1" |
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