The documentation says that SIGTERM is sent followed by SIGKILL 10 seconds later when using the restart action. I was wondering if these same signals are sent to the container when container updates are performed --reason being is that I would like to do some program cleanup prior to exiting the program completely.
Hello there, the same process you describe is performed when containers update:
SIGTERM is sent followed by
SIGKILL 10 seconds later. Trapping
SIGTERM should do the trick for your cleanup.