Laravel 5.5 - Redis::connect(): php_network_getaddresses: getaddrinfo failed: Name or service not known

Something strange is happening with my Laravel installation. When I run

php artisan config:cache

I get the following error:

php_network_getaddresses: getaddrinfo failed: Name or service not known
Exception message: 
Redis::connect(): php_network_getaddresses:
getaddrinfo failed: Name or service not known

When I clear the cache using php artisan config:clear the exception disappears. Does someone know where this comes from?

via Chebli Mohamed