#4 Ubuntu20にNGINX + MariaDB + phpMyAdminをセットアップ

# mysql_secure_installation

NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MariaDB                                                           
      SERVERS IN PRODUCTION USE!  PLEASE READ EACH STEP CAREFULLY!                                                              

In order to log into MariaDB to secure it, we'll need the current
password for the root user.  If you've just installed MariaDB, and
you haven't set the root password yet, the password will be blank,
so you should just press enter here.

Enter current password for root (enter for none): [Enter]   ※初期登録のためまずは「enter(none)」
OK, successfully used password, moving on...

Setting the root password ensures that nobody can log into the MariaDB
root user without the proper authorisation.

You already have a root password set, so you can safely answer 'n'.                                                             

Change the root password? [Y/n] [n]    ※変更しないため「n」
 ... skipping.

By default, a MariaDB installation has an anonymous user, allowing anyone
to log into MariaDB without having to have a user account created for
them.  This is intended only for testing, and to make the installation
go a bit smoother.  You should remove them before moving into a
production environment.

Remove anonymous users? [Y/n] [y]   ※anonymousユーザは削除するため「y」
 ... Success!

Normally, root should only be allowed to connect from 'localhost'.  This
ensures that someone cannot guess at the root password from the network.

Disallow root login remotely? [Y/n] [y]   ※リモートからのrootログインは禁止するため「y」
 ... Success!

By default, MariaDB comes with a database named 'test' that anyone can
access.  This is also intended only for testing, and should be removed
before moving into a production environment.

Remove test database and access to it? [Y/n] [y]   ※テストDBは削除するため「y」
 - Dropping test database...
 ... Success!
 - Removing privileges on test database...
 ... Success!

Reloading the privilege tables will ensure that all changes made so far
will take effect immediately.

Reload privilege tables now? [Y/n] [y]   ※権限再読み込みを実施するため「y」

 ... Success!

Cleaning up...

All done!  If you've completed all of the above steps, your MariaDB
installation should now be secure.

Thanks for using MariaDB!

[client]
host     = localhost
user     = root
password = Password
socket   = /var/run/mysqld/mysqld.sock
[mysql_upgrade]
host     = localhost
user     = root
password = Password
socket   = /var/run/mysqld/mysqld.sock

以下の箇所を変更

date.timezone = Asia/Tokyo
memory_limit = 256M
upload_max_filesize = 64M
max_execution_time = 600
session.save_path = "/var/lib/php/sessions
 

末尾に以下を追加

$cfg['PmaAbsoluteUri'] = 'https://manage.your-domain.com/phpmyadmin'; 

server {
    server_name manage.your-domain.com;

    root        /var/www/html;
    index       index.php index.html;
                                                                                                                  
    listen 80;
    listen 443 ssl;

    ssl_certificate      /etc/letsencrypt/live/your-domain.com/fullchain.pem;
    ssl_certificate_key  /etc/letsencrypt/live/your-domain.com/privkey.pem;

    ssl_protocols       TLSv1.2 TLSv1.3;

    # Redirect HTTP to HTTPS
    if ($scheme = http) {
        return 301 https://$server_name$request_uri;
    }

    location = /favicon.ico {
        log_not_found off;
        access_log off;
    }

    location = /robots.txt {
        allow all;
        log_not_found off;
        access_log off;
    }
 
    location ^~ /phpmyadmin {
        allow 127.0.0.1;
        allow 11.22.33.0/24;
        allow 12.34.56.78;
        deny all;

        alias /usr/share/phpmyadmin;
        index index.php;

        auth_basic "Restricted";
        auth_basic_user_file /etc/nginx/.htpasswd;

        location ~ ^/phpmyadmin(.+\.php)(.*)$ {
            fastcgi_pass unix:/run/php/php-fpm.sock;
            fastcgi_index index.php;
            fastcgi_split_path_info ^/phpmyadmin(.+\.php)(.*)$;
            fastcgi_param SCRIPT_FILENAME /usr/share/phpmyadmin$fastcgi_script_name;
            fastcgi_param PATH_INFO $fastcgi_path_info;
            include fastcgi_params;
        }
    }

    location / {
        try_files $uri $uri/ =404;

        allow 127.0.0.1;
        allow 11.22.33.0/24;
        allow 12.34.56.78;
        deny all;
    }

    location ~ \.php$ {
        include snippets/fastcgi-php.conf;
        include fastcgi_params;
        fastcgi_pass unix:/run/php/php-fpm.sock;
    }
}