All sites with error to establish connection to db

[4ntigona]

Hello people.

Today all my sites went down on my VPS server, with the following error:

Warning: mysqli_real_connect(): php_network_getaddresses: getaddrinfo failed: Name or service not known in /var/www/htdocs/wp-includes/class-wpdb.php on line 1982

Warning: mysqli_real_connect(): (HY000/2002): php_network_getaddresses: getaddrinfo failed: Name or service not known in /var/www/htdocs/wp-includes/class-wpdb.php on line 1982

php_network_getaddresses: getaddrinfo failed: Name or service not known

Every site is showing the same error, I've already checked wp-config.php data and everything is correct, also restarted sites, refreshed services, and all the usual stuff. I can't even dump sites' database since it says mysqldump: Got error: 2005: "Unknown MySQL server host 'global-db' (-2)" when trying to connect. Even ee-admin is unaccessible :(

Do you have any lights on this?

Thanks in advance!

[4ntigona]

Tried everything but restarting the server. Restarted and things got back to work.