Docker 1.13 and up allows a client to communicate
with older daemons. As a result, flags may be
present that are not supported by the older daemon.
The client already _hides_ flags that are not
supported yet, but this doesn't present users
from using those flags.
This change shows an error if a flag is used
that is not supported by the daemon (either
based on the API version, or because experimental
features are not enabled).
Note that for some options, a check is already
in place in the API client. For those
options, this is just a minor enhancement
to more clearly indicate which _flag_ is
not supported.
Before this change;
DOCKER_API_VERSION=1.24 docker run -d --stop-timeout=30 busybox top
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echo -e "FROM busybox\nRUN echo foo > bar" | DOCKER_API_VERSION=1.24 docker build --squash -
"squash" requires API version 1.25, but the Docker server is version 1.24
After this change;
DOCKER_API_VERSION=1.24 docker run -d --stop-timeout=30 busybox top
"--stop-timeout" requires API version 1.25, but the Docker daemon is version 1.24
echo -e "FROM busybox\nRUN echo foo > bar" | DOCKER_API_VERSION=1.24 docker build --squash -
"--squash" requires API version 1.25, but the Docker daemon is version 1.24
echo -e "FROM busybox\nRUN echo foo > bar" | docker build --squash -
"--squash" is only supported on a Docker daemon with experimental features enabled
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
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