9fdc574804
Container state counts are used for reporting in the `/info` endpoint. Currently when `/info` is called, each container is iterated over and the containers 'StateString()' is called. This is not very efficient with lots of containers, and is also racey since `StateString()` is not using a mutex and the mutex is not otherwise locked. We could just lock the container mutex, but this is proven to be problematic since there are frequent deadlock scenarios and we should always have the `/info` endpoint available since this endpoint is used to get general information about the docker host. Really, these metrics on `/info` should be deprecated. But until then, we can just keep a running tally in memory for each of the reported states. Signed-off-by: Brian Goff <cpuguy83@gmail.com> Upstream-commit: e4c03623c2fcd3013343d246e3432409850c8c37 Component: engine