Run scripts on each startup

[jonasgroenke]

Hey, can we add a possibility for scripts which are executed on every startup? Not only on initializing the database.

My use case is that I have init scripts which are creating some users specified in the secret files.
When I now change the passwords in the secrets, I have to completely remove the database just for updating the passwords.
Or do I miss something and there is already something for my use case?

My current solution is to add a custom entrypoint and call some methods from the official one. But other people might be also interested in and we can improve it.

#!/bin/bash
set -e
source /usr/local/bin/docker-entrypoint.sh

docker_setup_env "$@"

if [ "$(id -u)" = "0" ]; then
  mysql_note "Switching to dedicated user 'mysql'"
  exec gosu mysql "$BASH_SOURCE" "$@"
fi

mysql_note "Starting temporary server"
docker_temp_server_start "$@"
mysql_note "Temporary server started."

# Set mysql passwords from secrets
docker_process_init_files /docker-entrypoint-initdb.d/01-create-user.sh

mysql_note "Stopping temporary server"
docker_temp_server_stop
mysql_note "Temporary server stopped"

exec "$@"`

[wglambert]

Duplicate of #642 (comment)

See MariaDB/mariadb-docker#284 (comment)