Erro na identificação da variável de banco de dados | Ansible: sua infraestrutura como código

hosts: database handlers:
- name: restart mysql service:
```
name: mysql
state: restarted
```
  become: yes
tasks:
- name: 'Instala pacotes de dependencia do sistema operacional' apt: name:
```
- mysql-server-5.6
- python-mysqldb
```
  state: latest become: yes
- name: 'Cria o banco do MySQL' mysql_db: name: "{{ wp_db_name }}" login_user: root state: present
- name: 'Cria o usuário do MySQL' mysql_user: login_user: root name: "{{ wp_username }}" passoword: "{{wp_user_password}}" priv: "{{ wp_db_name }}.*:ALL" state: present host: "{{ item }}" with_items:
  - 'localhost'
  - '127.0.0.1'
  - "{{ wp_host_ip }}"
- name: 'Configura MySQL para aceitar conexoes remotas' copy: src: '/home/pablomoreira/ansible/files/my.cnf' dest: '/etc/mysql/my.conf' become: yes notify:
  - restart mysql
hosts: wordpress

handlers:
- name: restart apache service: name: apache2 state: restarted become: yes
tasks:
- name: 'Instala pacotes de dependencia do sistema operacional' apt: name:
```
- php5
- apache2
- libapache2-mod-php5
- php5-gd
- libssh2-php
- php5-mcrypt
- php5-mysql
```
  state: latest become: yes
- name: 'Baixa o arquivo de instalacao do Wordpress' get_url: url: 'https://wordpress.org/wordpress-5.0.tar.gz' dest: '/tmp/wordpress.tar.gz'
- name: 'Descompacta o wordpress' unarchive: src: '/tmp/wordpress.tar.gz' dest: /var/www/ remote_src: yes become: yes
- copy: src: "{{ wp_installation_dir }}/wp-config-sample.php" dest: "{{ wp_installation_dir }}wp-config.php" remote_src: yes become: yes
- name: 'Configura o wp-config com as entradas do banco de dados'replace: path: "{{ wp_installation_dir }}/wp-config.php" regexp: "{{ item.regex }}" replace: "{{ item.value }}" backup: yes with_items:
  - { regex: 'database_name_here', value: "{{wp_db_name}}"}
  - { regex: 'username_here', value: "{{ wp_username }}"}
  - { regex: 'password_here', value: "{{ wp_user_password }}"}
  - { regex: 'local_host', value: "{{ wp_db_ip }} "} become: yes
    - name: 'Configura Apache para servir o Wordpress' copy: src: '/home/pablomoreira/ansible/files/000-default.conf' dest: '/etc/apache2/sites-available/000-default.conf' become: yes notify:
    - restart apache