Solomon Hykes c9f3fd3fc7 Cleanup: refactor shutdown and signal handling facility ... This disentangles the following functions, which were previously all mixed together: * 1) Waiting for jobs to terminate when shutting down * 2) Handling signals in the Docker daemon * 3) Per-subsystem cleanup handlers * 4) pidfile management Responsibilities are dispatched as follows: * Signal traps are set in `main`, and trigger `engine.Shutdown` * `engine.Shutdown` coordinates cleanup by waiting for jobs to complete, and calling shutdown handlers * To perform cleanup at shutdown, each subsystem registers handlers with `engine.OnShutdown` * `daemon` is one subsystem, so it registers cleanup via `engine.OnShutdown`. * `daemon` owns the pidfile, which is used to lock access to `/var/lib/docker`. Part of its cleanup is to remove the pidfile. Signed-off-by: Solomon Hykes <solomon@docker.com>		2014-08-06 17:56:11 +00:00
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image.go	Move "image_tag" and "tag" to graph/tag.go	2014-08-06 17:18:51 -04:00
init.go	Cleanup: refactor shutdown and signal handling facility	2014-08-06 17:56:11 +00:00
MAINTAINERS	Add Tibor Vass as maintainer	2014-07-11 12:28:11 +00:00
server.go	Cleanup: refactor shutdown and signal handling facility	2014-08-06 17:56:11 +00:00
server_unit_test.go	Separate events subsystem	2014-08-06 10:08:19 +00:00