Include Dockerfile from another Dockerfile

[Ted Yu]

Hi,

I am currently working on creating Dockerfile which has steps to install Kerberos KDC packages.

There is already a Dockerfile for creating insecure VM.

Is there a way to include the insecure Dockerfile in the secure Dockerfile ?

I tried #include directive which seemed to be ignored.

Using include resulted in syntax error.

Here is the Docker version I am using:

Client:

 Version:      1.13.1

 API version:  1.26

 Go version:   go1.7.5

 Git commit:   092cba3

 Built:        Wed Feb  8 08:47:51 2017

Thanks for your hint.

[Valentin Rothberg]

Hi Ted,

afaik there is no idiomatic way to do this. You can look up some pull
requests on github (e.g., https://github.com/docker/docker/pull/2337).
However, if you really want such composition, you can use the C
preprocessor (cpp) and then pipe the output to docker build or just
generate a new file.

Kind regards,
Valentin

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