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Author SHA1 Message Date
Madhav Puri
8cfcd87380 incorporate doc review comments
Signed-off-by: Madhav Puri <madhav.puri@gmail.com>
2015-09-16 03:31:15 -07:00
Madhav Puri
54240f8da9 Support for passing build-time variables in build context
- The build-time variables are passed as environment-context for command(s)
run as part of the RUN primitve. These variables are not persisted in environment of
intermediate and final images when passed as context for RUN. The build environment
is prepended to the intermediate continer's command string for aiding cache lookups.
It also helps with build traceability. But this also makes the feature less secure from
point of view of passing build time secrets.

- The build-time variables also get used to expand the symbols used in certain
Dockerfile primitves like ADD, COPY, USER etc, without an explicit prior definiton using a
ENV primitive. These variables get persisted in the intermediate and final images
whenever they are expanded.

- The build-time variables are only expanded or passed to the RUN primtive if they
are defined in Dockerfile using the ARG primitive or belong to list of built-in variables.
HTTP_PROXY, HTTPS_PROXY, http_proxy, https_proxy, FTP_PROXY and NO_PROXY are built-in
variables that needn't be explicitly defined in Dockerfile to use this feature.

Signed-off-by: Madhav Puri <madhav.puri@gmail.com>
2015-09-16 03:31:15 -07:00
Sally O'Malley
48badd2a2e man Dockerfile ADD/COPY/FROM clarify
Signed-off-by: Sally O'Malley <somalley@redhat.com>
2015-09-03 09:08:25 -04:00
Mary Anthony
eacae64bd8 Moving man pages out of docs
Adding in other areas per comments
Updating with comments; equalizing generating man page info
Updating with duglin's comments
Doug is right here again;fixing.

Signed-off-by: Mary Anthony <mary@docker.com>
2015-06-10 13:43:35 -07:00
Renamed from docs/man/Dockerfile.5.md (Browse further)