systemd systems do not require a /etc/hosts file exists since an nss
module is shipped that creates localhost implicitly. So, mounting
/etc/hosts can fail on these sorts of systems, as was reported on CoreOS
in issue #5812.
Instead of trying to bind mount just copy the hosts entries onto the
containers private /etc/hosts.
Docker-DCO-1.1-Signed-off-by: Brandon Philips <brandon.philips@coreos.com> (github: philips)
Upstream-commit: 000a37fe9d13a173ab46fcd5b8e693950a438f98
Component: engine