Sample: Use MySQLTuner in `mariadb` Docker container

use_mysqltuner_in_mariadb_container.sh

# MySQLTuner: https://github.com/major/MySQLTuner-perl

# Open Bash with the container.
docker exec [mariadb_or_mysql] bash

# Change the working directory to `/tmp`.
cd /tmp

# Install wget.
apt-get update
apt-get install -y wget

# Download mysqltuner.
wget http://mysqltuner.pl/ -O mysqltuner.pl
wget https://raw.githubusercontent.com/major/MySQLTuner-perl/master/basic_passwords.txt -O basic_passwords.txt
wget https://raw.githubusercontent.com/major/MySQLTuner-perl/master/vulnerabilities.csv -O vulnerabilities.csv

# Run MySQLTuner.
chmod u+x mysqltuner.pl
./mysqltuner.pl --user $MYSQL_USER --pass $MYSQL_PASSWORD