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Olá, boa noite.

Estou tentando conectar com o mysqldb mas fica dando falha e eu não estou entendendo o motivo, alguém pode ajudar? Segue os arquivos:

Vagrantfile

$script_mysql = <<-SCRIPT
  apt-get update && \
  apt-get install -y mysql-server-5.7 && \
  mysql -e "create user 'phpuser'@'%' identified by 'pass';"
SCRIPT

Vagrant.configure("2") do |config|
  config.vm.box = "ubuntu/bionic64"

  config.vm.define "mysqldb" do |mysql|
    mysql.vm.network "public_network", ip: "192.168.1.24"

    mysql.vm.provision "shell",
      inline: "cat /configs/id_bionic.pub >> .ssh/authorized_keys"
    mysql.vm.provision "shell", inline: $script_mysql
    mysql.vm.provision "shell",
      inline: "cat /configs/mysqld.cnf > /etc/mysql/mysql.conf.d/mysqld.cnf"
    mysql.vm.provision "shell", inline: "service mysql restart"

    mysql.vm.synced_folder "./configs", "/configs"
    mysql.vm.synced_folder ".", "/vagrant", disabled: true
  end

  config.vm.define "phpweb" do |phpweb|
    phpweb.vm.network "forwarded_port", guest: 8888, host: 8888
    phpweb.vm.network "public_network", ip: "192.168.1.25"

    phpweb.vm.provision "shell",
      inline: "apt-get update && apt-get install -y puppet"

    phpweb.vm.provision "puppet" do |puppet|
      puppet.manifests_path = "./configs/manifests"
      puppet.manifest_file = "phpweb.pp"
    end
  end
end

phpweb.pp

# execute 'apt-get update'
exec { 'apt-update':
    command => '/usr/bin/apt-get update' 
}

exec { 'run-php7':
    require => Package['php7.2'],
    command => '/usr/bin/php -S 0.0.0.0:8888 -t /vagrant/src &'  
}

package { ['php7.2', 'php7.2-mysql']:
  require => Exec['apt-update'],
  ensure => installed,
}

index.php

<?php
echo "Testando conexao <br /> <br />";
$servername = "192.168.1.24";
$username = "phpuser";
$password = "pass";

// Create connection
$conn = new mysqli($servername, $username, $password);

// Check connection
if ($conn->connect_error) {
    die("Conexão falhou: " . $conn->connect_error);
}
echo "Conectado com sucesso";
?>