The `DEBIAN_FRONTEND` environment variable is used to control the interface by which debconf questions are presented to the user (see [`man 7 debconf`][1]). In `DEBIAN_FRONTEND=noninteractive apt-get update && apt-get install -y`, the `DEBIAN_FRONTEND` environment variable is only set for the `apt-get update` command which does not ask debconf questions, and will not affect the `apt-get install` command where these questions are actually asked. It should be the other way around.
[1]: https://manpages.debian.org/debconf.7.html
Signed-off-by: Murukesh Mohanan <murukesh.mohanan@gmail.com>
This replaces the use of bash where suitable, to allow easier copy/pasting
of shell examples without copying the prompt or process output.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Support for ALL_PROXY as default build-arg was added recently in
buildkit and the classic builder.
This patch adds the `ALL_PROXY` environment variable to the list of
configurable proxy variables, and updates the documentation.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
- rename "experimental" to "labs"
- rephrase recommendation for picking a version
- clarify that the "labs" channel provides a superset of the "stable" channel.
- remove "External implementation features" section, because it overlapped
with the "syntax" section.
- removed `:latest` from the "stable" channel (generally not recommended)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
- update some examples to show the BuildKit output
- remove some wording about "images" being used for the build cache
- add a link to the `--cache-from` section
- added a link to "scanning your image with `docker scan`"
- updated link to "push your image"
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
- use "console" for code-hints, to make process output distinguishable
from the commands that are executed
- use a consistent prompt for powershell examples
- minor changes in wording around "build context" to reduce confusion
with `docker context`
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
The `ENV key value` form can be ambiguous, for example, the following defines
a single env-variable (`ONE`) with value `"TWO= THREE=world"`:
ENV ONE TWO= THREE=world
While we cannot deprecate/remove that syntax (as it would break existing
Dockerfiles), we should reduce exposure of the format in our examples.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
1. Fix dead URL to [Dockerfile best practices](https://docs.docker.com/develop/develop-images/dockerfile_best-practices/#leverage-build-cache).
2. Add missing information about cache invalidation by `COPY`. It works in the same way as in the case of `ADD`. Informing only about the `ADD`s behavior is misleading as one can infer that these two directives differ in this regard.
3. Add missing info on RUN cache invalidation by COPY
Signed-off-by: Maciej Kalisz <maciej.d.kalisz@gmail.com>
This link was broken when generating the documentation (due to
a bug in Jekyll not converting wrapped internal links)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
- add code-fences with code-hints so that the right hightlighting is applied
- replace `*` for `-` in bullet-lists for consistency with other parts of the
documentation.
- reduced number of "notes", either by combining some, or by changing some
to regular text.
- removed "line numbers" from some examples, because there's only four lines,
which should not need really need line numbers.
- reformat some notes to our new format
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Unlike GitHub's web-UI, the "rouge" hightlighter used in our
online documentation is case-sensitive. As a result, code-blocks
having the Dockerfile (uppercase) code-hint were not highlighted.
This changes those to use lowercase, which is supported by both.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
CrazyMax
Murukesh Mohanan
Stefan Scherer
Sebastiaan van Stijn
jlecordier
Peter Dave Hello
Sebastiaan van Stijn
Takuya Noguchi
Govind Rai
Tianon Gravi
Kyle
Eric Engestrom
eyherabh
Tonis Tiigi
dito
Maciej Kalisz
Hector S
Adrian Plata
Brandon Mitchell
Michael Irwin
Daniel Cassidy
Alex Mayer
Misty Stanley-Jones
Daniel Nephin