How to run a script every started?

[zhangguanzhang]

There are inexplicable permissions problems in some environments. I want to execute chown before the mysqld process to fix these problems. How could I use the root user to run the script, :

chown -R mysql:mysql /var/log/mysql  /var/run/mysql /var/lib/mysql
chmod 1777 /tmp

[zhangguanzhang]

something like this MariaDB/mariadb-docker#284 (comment)
But I dont't want to hijack the docker-entrypoint.sh

[tianon]

Duplicate of #642

[zhangguanzhang]

not Duplicate. the scripts in /docker-entrypoint-initdb.d/ cannot use gosu root to run a command

[yosifkit]

gosu can only be used to drop from root to another user; not to go from an arbitrary user up to root.

See also https://github.com/tianon/gosu/tree/9f7cd138a1ebc0684d43ef6046bf723978e8741f#warning

[tianon]

If you want to run the startup scripts as root, you'll need to implement your own entrypoint.

[zhangguanzhang]

If you want to run the startup scripts as root, you'll need to implement your own entrypoint.

I think the script should change to this:

		if [ "$(id -u)" = "0" ]; then
			mysql_note "Switching to dedicated user 'mysql'"
                        docker_process_init_files /docker-entrypoint-root-run.d/*
			exec gosu mysql "$BASH_SOURCE" "$@"
		fi