On kernels without this options set, publishing ports for swarm
services does not work, making the published port not accessible
("connection refused")
Thanks to Wenbo Wang for reporting, and Tianon for finding this.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
(cherry picked from commit 44e1c6ce81ff62c76ba630caf16a73922950abc3)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Upstream-commit: 25bec4665b6f011e52f7b2765ba1579c7430481d
Component: engine
The contrib directory contains scripts, images, and other helpful things
which are not part of the core docker distribution. Please note that they
could be out of date, since they do not receive the same attention as the
rest of the repository.