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The default signal used by docker to stop a container is SIGTERM and that signal is understood by PHP-FPM as immediate termination. This means that `php-fpm` won't wait for in-flight requests to finish before of stopping the workers and main process. This behaviour is quite undesired for production environments and should be avoided as much as possible. This implementation is meant to be extremely simple and only address the stop signal used when running `docker stop`. `php-fpm` signal choices are somewhat peculiar (`SIGUSR2` for example) and if we want to "fix" them we would have to use a tool (e.g.: `dumb-init`). More info: - https://linux.die.net/man/8/php-fpm - https://docs.docker.com/engine/reference/builder/#stopsignal - https://github.com/Yelp/dumb-init - https://github.com/usabilla/php-docker-template/pull/102 |
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