Commits on Oct 22, 2019

1. Propagate SIGTERM for graceful shutdown …

   If the process receiving the signal is PID 1, it gets special treatment
   by the kernel; if it hasn't registered a handler for the signal, the
   kernel won't fall back to default behavior, and nothing happens. Prior
   to this patch, the entrypoint script is PID 1 in the container, and by
   default, shell does not register SIGTERM handler. As a result, `docker
   stop` will not work properly when trying to gracefully shutdown the
   container.
   
   This patch adds `tini` to be the PID 1 in the container to do PID 1
   things, and correctly propagate the SIGTERM signal.

   

   jieyu committed Oct 22, 2019
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