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Michael Crosby
fdb100d247
We need to make sure the container is destroyed before closing the stdio for the container. This becomes a big issues when running in the host's pid namespace because the other processes could have inherited the stdio of the initial process. The call to close will just block as they still have the io open. Calling destroy before closing io, especially in the host pid namespace will cause all additional processes to be killed in the container's cgroup. This will allow the io to be closed successfuly. This change makes sure the order for destroy and close is correct as well as ensuring that if any errors encoutered during start or exec will be handled by terminating the process and destroying the container. We cannot use defers here because we need to enforce the correct ordering on destroy. This also sets the subreaper setting for runc so that when running in pid host, runc can wait on the addiontal processes launched by the container, useful on destroy, but also good for reaping the additional processes that were launched. Signed-off-by: Michael Crosby <crosbymichael@gmail.com>