Bash Script: Create MySQL Database & User - https://blog.magepsycho.com/

mysql-create-db-user.sh

#!/bin/bash

#
# Script to create MySQL db + user
#
# @author   Raj KB <magepsycho@gmail.com>
# @website  http://www.magepsycho.com
# @version  0.1.0

################################################################################
# CORE FUNCTIONS - Do not edit
################################################################################
#
# VARIABLES
#
_bold=$(tput bold)
_underline=$(tput sgr 0 1)
_reset=$(tput sgr0)

_purple=$(tput setaf 171)
_red=$(tput setaf 1)
_green=$(tput setaf 76)
_tan=$(tput setaf 3)
_blue=$(tput setaf 38)

#
# HEADERS & LOGGING
#
function _debug()
{
    [ "$DEBUG" -eq 1 ] && $@
}

function _header()
{
    printf "\n${_bold}${_purple}==========  %s  ==========${_reset}\n" "$@"
}

function _arrow()
{
    printf "➜ $@\n"
}

function _success()
{
    printf "${_green}✔ %s${_reset}\n" "$@"
}

function _error() {
    printf "${_red}✖ %s${_reset}\n" "$@"
}

function _warning()
{
    printf "${_tan}➜ %s${_reset}\n" "$@"
}

function _underline()
{
    printf "${_underline}${_bold}%s${_reset}\n" "$@"
}

function _bold()
{
    printf "${_bold}%s${_reset}\n" "$@"
}

function _note()
{
    printf "${_underline}${_bold}${_blue}Note:${_reset}  ${_blue}%s${_reset}\n" "$@"
}

function _die()
{
    _error "$@"
    exit 1
}

function _safeExit()
{
    exit 0
}

#
# UTILITY HELPER
#
function _seekConfirmation()
{
  printf "\n${_bold}$@${_reset}"
  read -p " (y/n) " -n 1
  printf "\n"
}

# Test whether the result of an 'ask' is a confirmation
function _isConfirmed()
{
    if [[ "$REPLY" =~ ^[Yy]$ ]]; then
        return 0
    fi
    return 1
}


function _typeExists()
{
    if [ $(type -P $1) ]; then
        return 0
    fi
    return 1
}

function _isOs()
{
    if [[ "${OSTYPE}" == $1* ]]; then
      return 0
    fi
    return 1
}

function _checkRootUser()
{
    #if [ "$(id -u)" != "0" ]; then
    if [ "$(whoami)" != 'root' ]; then
        echo "You have no permission to run $0 as non-root user. Use sudo"
        exit 1;
    fi

}

function _printPoweredBy()
{
    cat <<"EOF"

Powered By:
   __  ___              ___               __
  /  |/  /__ ____ ____ / _ \___ __ ______/ /  ___
 / /|_/ / _ `/ _ `/ -_) ___(_-</ // / __/ _ \/ _ \
/_/  /_/\_,_/\_, /\__/_/  /___/\_, /\__/_//_/\___/
            /___/             /___/

 >> Store: http://www.magepsycho.com
 >> Blog: http://www.blog.magepsycho.com

################################################################
EOF
}
################################################################################
# SCRIPT FUNCTIONS
################################################################################
function generatePassword()
{
    echo "$(openssl rand -base64 12)"
}

function _printUsage()
{
    echo -n "$(basename $0) [OPTION]...

Create MySQL db & user.
Version $VERSION

    Options:
        -h, --host        MySQL Host
        -d, --database    MySQL Database
        -u, --user        MySQL User
        -p, --pass        MySQL Password (If empty, auto-generated)
        -h, --help        Display this help and exit
        -v, --version     Output version information and exit

    Examples:
        $(basename $0) --help

"
    _printPoweredBy
    exit 1
}

function processArgs()
{
    # Parse Arguments
    for arg in "$@"
    do
        case $arg in
            -h=*|--host=*)
                DB_HOST="${arg#*=}"
            ;;
            -d=*|--database=*)
                DB_NAME="${arg#*=}"
            ;;
            -u=*|--user=*)
                DB_USER="${arg#*=}"
            ;;
             -p=*|--pass=*)
                DB_PASS="${arg#*=}"
            ;;
            --debug)
                DEBUG=1
            ;;
            -h|--help)
                _printUsage
            ;;
            *)
                _printUsage
            ;;
        esac
    done
    [[ -z $DB_NAME ]] && _error "Database name cannot be empty." && exit 1
    [[ $DB_USER ]] || DB_USER=$DB_NAME
}

function createMysqlDbUser()
{
    SQL1="CREATE DATABASE IF NOT EXISTS ${DB_NAME};"
    SQL2="CREATE USER '${DB_USER}'@'%' IDENTIFIED BY '${DB_PASS}';"
    SQL3="GRANT ALL PRIVILEGES ON ${DB_NAME}.* TO '${DB_USER}'@'%';"
    SQL4="FLUSH PRIVILEGES;"

    if [ -f /root/.my.cnf ]; then
        $BIN_MYSQL -e "${SQL1}${SQL2}${SQL3}${SQL4}"
    else
        # If /root/.my.cnf doesn't exist then it'll ask for root password
        _arrow "Please enter root user MySQL password!"
        read rootPassword
        $BIN_MYSQL -h $DB_HOST -u root -p${rootPassword} -e "${SQL1}${SQL2}${SQL3}${SQL4}"
    fi
}

function printSuccessMessage()
{
    _success "MySQL DB / User creation completed!"

    echo "################################################################"
    echo ""
    echo " >> Host      : ${DB_HOST}"
    echo " >> Database  : ${DB_NAME}"
    echo " >> User      : ${DB_USER}"
    echo " >> Pass      : ${DB_PASS}"
    echo ""
    echo "################################################################"
    _printPoweredBy

}

################################################################################
# Main
################################################################################
export LC_CTYPE=C
export LANG=C

DEBUG=0 # 1|0
_debug set -x
VERSION="0.1.0"

BIN_MYSQL=$(which mysql)

DB_HOST='localhost'
DB_NAME=
DB_USER=
DB_PASS=$(generatePassword)

function main()
{
    [[ $# -lt 1 ]] && _printUsage
    _success "Processing arguments..."
    processArgs "$@"
    _success "Done!"

    _success "Creating MySQL db and user..."
    createMysqlDbUser
    _success "Done!"

    printSuccessMessage

    exit 0
}

main "$@"

_debug set +x

Thanks for the script, it works great but I didn't like that MySQL password gets prompted in clear text if you don't have the cnf.

I changed line 223 to:

read -s -p "Password: " rootPassword

I changed line 223 to:
read -s -p "Password: " rootPassword

Good Idea. Will update my script.

nice

Nice job! The only problem i encountered was with line 214:
SQL2="CREATE USER '${DB_USER}'@'%' IDENTIFIED BY '${DB_PASS}';"

I replaced it with:
SQL2="CREATE USER '${DB_USER}'@'${DB_HOST}' IDENTIFIED BY '${DB_PASS}';"

The original line didn't work on:
CentOS release 7 7.7.1908 (Core)
mariadb-5.5.64-1

This script has been tested on Alpine Linux as of March 26th, 2022. It works just fine, except that it throws errors if you use hyphenated user and database names. Other than the suggested "test-db" and "test-user" things not working, this script has been a great help/convenience.

using mysql-create-db-user.sh --database="spex" i get:
ERROR 1044 (42000) at line 1: Access denied for user 'root'@'%' to database 'spex'
with or without .my.cfg. Also the root password still show clear.

I am on almalinux 8.4 and use mysql Ver 15.1 Distrib 10.3.35-MariaDB, for Linux (x86_64) using readline 5.1
Other than this it looks like a neat script