amazon-linux-extras list | grep maria
sudo amazon-linux-extras install  mariadb10.5
sudo systemctl enable mariadb
sudo systemctl start mariadb
sudo systemctl status mariadb
sudo mysql_secure_installation
n #for unix_socket authentication
Y #for change root password
mysql -u root -p
show engines;
show variables like '%innodb%';
cd /etc/my.cnf.d
sudo vi mariadb-server.cnf

#install nodejs into yum repolist
sudo yum install -y gcc-c++ make
curl -sL https://rpm.nodesource.com/setup_16.x | sudo -E bash -
sudo yum install -y nodejs
node -e "console.log('Running Node.js ' + process.version)"

#config syslog for nodejs service
sudo touch /var/log/nodejs.log
sudo chmod 600 nodejs.log
sudo vi /etc/rsyslog.d/nodejs.conf
sudo systemctl restart rsyslog

#config systemd service for nodejs
sudo vi /etc/systemd/system/nodejs.service
sudo systemctl daemon-reload
sudo systemctl enable nodejs
sudo systemctl start nodejs

amazon-linux-extras list
sudo amazon-linux-extras install nginx1
sudo systemctl enable nginx
sudo mv ~/my_nginx.conf /etc/nginx/nginx.conf
sudo systemctl start nginx
sudo systemctl status nginx

# file: /etc/systemd/system/nodejs.service
[Unit]
Description=nodejs service for my-app
After=network.target
After=mariadb.service

[Service]
User=ec2-user
Group=ec2-user
WorkingDirectory=/home/ec2-user/my-app-dir
ExecStart=/usr/bin/node server.js
Restart=on-failure
RestartSec=10s

StandardOutput=syslog
StandardError=syslog
SyslogIdentifier=nodejs

[Install]
WantedBy=multi-user.target

# file: /etc/rsyslog.d/nodejs.conf
if $programname == 'nodejs' then /var/log/nodejs.log
& stop

sudo tail -f /var/log/messages
sudo tail -f /var/log/nodejs.log
sudo tail -f /var/log/nginx/access.log