/usr/share/tripleo-image-elements/os-svc-install/bin/os-db-create is in python-tripleo-image-elements 0.7.1-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | #!/bin/bash
set -eu
function create_db {
  local sql="
    create database if not exists $1;
    grant all on $1.* to '$2'@'localhost' identified by '$3';
    grant all on $1.* to '$2'@'%'         identified by '$3';
    flush privileges;"
  echo "$sql" | mysql
}
if [ $# -lt 3 ]; then
  echo "Usage: os-db-create DB_NAME DB_USER DB_PASS"
  exit 1
fi
create_db $*
 |