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Merge pull request #23760 from SerhatG/docker_doc_cmd_shell_comment

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Docker reference error CMD with ENV variables
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Doug Davis 2016-06-23 13:34:14 -07:00 committed by GitHub
commit 86d5c7e759
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docs/reference/builder.md
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@ -606,7 +606,7 @@ instruction as well.
> This means that normal shell processing does not happen. For example,
> `CMD [ "echo", "$HOME" ]` will not do variable substitution on `$HOME`.
> If you want shell processing then either use the *shell* form or execute
> a shell directly, for example: `CMD [ "sh", "-c", "echo", "$HOME" ]`.
> a shell directly, for example: `CMD [ "sh", "-c", "echo $HOME" ]`.
When used in the shell or exec formats, the `CMD` instruction sets the command
to be executed when running the image.
@ -1074,7 +1074,7 @@ sys 0m 0.03s
> This means that normal shell processing does not happen. For example,
> `ENTRYPOINT [ "echo", "$HOME" ]` will not do variable substitution on `$HOME`.
> If you want shell processing then either use the *shell* form or execute
> a shell directly, for example: `ENTRYPOINT [ "sh", "-c", "echo", "$HOME" ]`.
> a shell directly, for example: `ENTRYPOINT [ "sh", "-c", "echo $HOME" ]`.
> Variables that are defined in the `Dockerfile`using `ENV`, will be substituted by
> the `Dockerfile` parser.