This warning was originally added in [moby@3aa70c1], and moved to be printed
on both `run` and `create` in commit 7c514a31c9.
However, [moby@57f1305] (docker 19.03, API 1.40) moved such warnings to
the daemon side. The patch mentioned this issue:
> This patch will have one side-effect; docker cli's that also perform this check
> client-side will print the warning twice; this can be addressed by disabling
> the cli-side check for newer API versions, but will generate a bit of extra
> noise when using an older CLI.
The CLI does not take this into account currently, and still prints warnings
twice; even in cases where the option is not supported by the daemon, and
discarded:
On a host without OomKillDisable support:
docker create --oom-kill-disable alpine
WARNING: Disabling the OOM killer on containers without setting a '-m/--memory' limit may be dangerous.
WARNING: Your kernel does not support OomKillDisable. OomKillDisable discarded.
On a host that supports it:
docker create --oom-kill-disable alpine
WARNING: Disabling the OOM killer on containers without setting a '-m/--memory' limit may be dangerous.
WARNING: OOM killer is disabled for the container, but no memory limit is set, this can result in the system running out of resources.
This patch removes the client-side warning, leaving it to the daemon to
report if any warnings should produced (and the client to print them).
With this patch applied:
On a host without OomKillDisable support:
docker create --oom-kill-disable alpine
WARNING: Your kernel does not support OomKillDisable. OomKillDisable discarded.
On a host that supports it:
docker create --oom-kill-disable alpine
WARNING: OOM killer is disabled for the container, but no memory limit is set, this can result in the system running out of resources.
[moby@3aa70c1]: 3aa70c1948
[moby@57f1305]: 57f1305e74
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
58a35692d6