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What is the STOPSIGNAL instruction good for in Docker?

Experience Level: Senior
Tags: Docker


The STOPSIGNAL instruction sets the system call signal that will be sent to the container to exit. This signal can be a signal name in the format SIG<NAME>, for instance SIGKILL, or an unsigned number that matches a position in the kernel’s syscall table, for instance 9. The default is SIGTERM if not defined.

The image’s default stopsignal can be overridden per container, using the --stop-signal flag on docker run and docker create.



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