Shell Script to install MariaDB on Linux

mariadb_install.sh

#!/usr/bin/env bash
# exit on error
set -o errexit

params_file='params.ini'

#Including .ini file
. $params_file

if [ ! -f $params_file ]; then
  echo "$params_file does not exist. Exit setup."
  exit
fi

root_password=${DB_ROOT_PASSWORD}
db_port=${DB_PORT}

echo "root: $root_password, port: $db_port"

cd /tmp

# Check Mariad is installed or not?
type mariadb >/dev/null 2>&1 && echo "MySQL already installed." && exit || echo "MySQL not present. Let's install..."

dnf group install "Development Tools" -y

yum install wget vim -y

# Add mariadb_repo to OS (if not)
if [ ! -f "/etc/yum.repos.d/mariadb.repo" ]; then
  echo "/etc/yum.repos.d/mariadb.repo does not exist. Let's create it."
  wget https://downloads.mariadb.com/MariaDB/mariadb_repo_setup
  chmod +x mariadb_repo_setup
  ./mariadb_repo_setup
fi

dnf install -y curl gcc openssl-devel bzip2-devel libffi-devel zlib-devel wget make

yum install MariaDB-shared MariaDB-devel -y

yum -y install MariaDB-server MariaDB-client

sudo systemctl enable mariadb

sudo systemctl start mariadb

# Make sure that NOBODY can access the server without a password
#sudo mariadb -e "UPDATE mysql.user SET Password = PASSWORD('$root_password') WHERE User = 'root'"
#==> error:ERROR 1356 (HY000) at line 1: View 'mysql.user' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
#sudo mariadb -e "SET PASSWORD FOR 'root'@'%' = PASSWORD('$root_password')"  # error: ERROR 1133 (28000) at line 1: Can't find any matching row in the user table
#sudo mariadb -e "UPDATE user SET Password=PASSWORD('$root_password') WHERE User='root';FLUSH PRIVILEGES;"  # No database selected
#sudo mariadb -e "GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '$root_password'"  # Can't find any matching row in the user table

sudo mariadb -e "ALTER USER 'root'@'localhost' IDENTIFIED BY '$root_password';FLUSH PRIVILEGES;"

# Kill off the demo database
sudo mariadb -e "DROP DATABASE IF EXISTS test"
# Kill the anonymous users
sudo mariadb -e "DROP USER IF EXISTS ''@'localhost'"
# Because our hostname varies we'll use some Bash magic here.
#sudo mariadb -e "DROP USER IF EXISTS ''@'$(hostname)'"

#  CHANGE PORT - IF NEED
# Check if the script is run as root
if [ "$EUID" -ne 0 ]; then
  echo "Please run this script as root or with sudo."
  exit 1
fi

# Define the new MariaDB port
new_port=$db_port  # Change this to your desired port number

# Check if the port is in use using netstat
if netstat -tuln | grep -q ":$new_port "; then
  echo "Port $port_to_check is in use."
#  exit
else
  echo "Port $port_to_check is not in use."
  echo "Let's change db-port to: $db_port"
  # Backup the MariaDB configuration file
  cp /etc/my.cnf /etc/my.cnf.bak

  # Check if the port setting already exists in the configuration file
  if grep -q "^port" /etc/my.cnf; then
    # If the port setting exists, update it
    sed -i "s/^port = .*/port = $new_port/" /etc/my.cnf
  else
    # If the port setting does not exist, add it
    echo -e "\n[mysqld]\nport = $new_port" >> /etc/my.cnf
  fi
  # Restart MariaDB
  systemctl restart mariadb
fi


# Update firewall rules if firewalld is installed
if command -v firewall-cmd &> /dev/null; then
  firewall-cmd --zone=public --add-port=$new_port/tcp --permanent
  firewall-cmd --reload
fi

echo "MariaDB port is $new_port. Don't forget to update application configurations."

# Open port
#echo "Open port: $db_port"
#firewall-cmd --permanent --zone=public --add-port=$db_port/tcp
#firewall-cmd --reload

echo "Complete install MariaDB-server."

exit

# Source: https://infra.lecuong.info/2024/09/shell-script-to-install-mariadb-on-linux.html