The cloud logging client should be closed when the log driver is closed. Otherwise dockerd will keep a gRPC connection to the logging endpoint open indefinitely.
This results in a slow leak of tcp sockets (1) and memory (~200Kb) any time that a container using `--log-driver=gcplogs` is terminates.
Signed-off-by: Patrick Haas <patrickhaas@google.com>
(cherry picked from commit ef553e14a4)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
74c0c5b7f1