Falha na conexão com o banco, alguém pode me ajudar?

Estou com um erro na conexão do wordpress com o banco de Dados todo o resto do código esta dando certo. Alguém pode me ajudar?

---
- hosts: db
  tasks:
   - name: 'banco de dados'
     apt:
      name: ['mysql-server','python3-mysqldb','python3-apt','python-pymysql'] 
     become: yes
   - name: 'criando um banco de dados'
     mysql_db:
       login_unix_socket: /var/run/mysqld/mysqld.sock 
       name: wordpress_db
       state: present
     become: yes
   - name: 'crinado usuário no banco'
     mysql_user:
       login_unix_socket: /var/run/mysqld/mysqld.sock
       login_user: root
       name: wordpress_user
       password: 12345
       priv: 'wordpress_db.*:ALL'
       state: present
     become: yes
- hosts: wordpress
  handlers:
   - name: restart apache
     service:
       name: apache2
       state: restarted
     become: yes
  tasks:
   - name: 'instalando php'
     apt:
       update_cache: yes
       name:
         - php
         - apache2
         - libapache2-mod-php
         - php-cli
         - php-common
         - php-mbstring
         - php-gd
         - php-xml
         - php-mysql
         - php-zip
       state: latest
     become: yes
   - name: 'dowload do wordpress'
     get_url:
       url: 'https://wordpress.org/latest.tar.gz'
       dest: '/tmp/wordpress.tar.gz'
   - name: 'descompacta arquivo'
     unarchive:
       src: '/tmp/wordpress.tar.gz'
       dest: '/var/www/'
       remote_src: yes
     become: yes

   - name: 'copiando arquivo'
     copy:
       src: '/var/www/wordpress/wp-config-sample.php'
       dest: '/var/www/wordpress/wp-config.php'
       remote_src: yes
     become: yes

   - name: 'módulo replace'
     replace: 
       path: '/var/www/wordpress/wp-config.php'
       regexp: "{{ item.regex }}"
       replace: "{{ item.value }}"
       backup: yes
     with_items:
      - {regex: 'database_name_here', value: 'wordpress_db'}
      - {regex: 'username_here', value: 'wordpress_user'}
      - {regex: 'password_here', value: '12345'}
     become: yes
   - name: 'configuração do apache'
     copy:
       src: '/vagrant/000-default.conf'
       dest: '/etc/apache2/sites-available/000-default.conf'
     become: yes

     notify:
      - restart apache