Problema ao provisionar maquina mysql hosts database

Fiz todos os passos de acordo com o curso, mas o arquivo ignora meu host database. E faz apenas o wordpress.

[WARNING]: Could not match supplied host pattern, ignoring: database

PLAY [database] ****************************************************************
skipping: no hosts matched

segue meu playbook.yml

---
- hosts: database
  tasks:
    - name: 'instala pacotes de dependencia no sistema operacional'
      apt:
        name: ["mysql-server-5.6","python-mysqldb"]
        state: latest
      become: yes
    - name: 'Cria o banco do MySQL'
      mysql_db:
        name: wordpress_db
        login_user: root
        state: present
    - name: 'Cria o usuário do MySQL'
      mysql_user:
        login_user: root
        name: wordpress_user
        password: 12345
        priv: 'wordpress_db.*:ALL'
        state: present
- hosts: wordpress
  handlers:
    - name: restart apache
      service:
        name: apache2
        state: restarted
      become: yes
  tasks:
    - name: 'instala pacotes de dependencia no sistema operacional'
      apt:
        name: ["php5", "apache2", "libapache2-mod-php5", "php5-gd", "libssh2-php", "php5-mcrypt", "mysql-server-5.6",
        "python-mysqldb", "php5-mysql"]
        state: latest
      become: yes
    - name: 'Cria o banco do MySQL'
      mysql_db:
        name: wordpress_db
        login_user: root
        state: present
    - name: 'Cria o usuário do MySQL'
      mysql_user:
        login_user: root
        name: wordpress_user
        password: 12345
        priv: 'wordpress_db.*:ALL'
        state: present
    - name: 'Baixa o arquivo de instalacao do Wordpress'
      get_url:
        url: 'https://wordpress.org/latest.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: '/var/www/wordpress/wp-config-sample.php'
        dest: '/var/www/wordpress/wp-config.php'
        remote_src: yes
      become: yes
    - name: 'Configura o wp-config com as entradas do banco de dados'
      replace:
        path: '/var/www/wordpress/wp-config.php'
        regexp: "{{ item.regex }}"
        replace: "{{ item.value }}"
      with_items:
        - { regex: 'database_name_here', value: 'wordpress_db'}
        - { regex: 'username_here', value: 'wordpress_user'}
        - { regex: 'password_here', value: '12345'}
      become: yes
    - name: 'Configura o apache para servir o wordpress'
      copy:
        src: '/vagrant/files/000-default.conf'
        dest: '/etc/apache2/sites-available/000-default.conf'
        remote_src: yes
      become : yes
      notify:
        - restart apache

segue também meu arquivo host

[wordpress]
192.168.1.132 ansible_user=vagrant ansible_ssh_private_key_file="--private-key .ssh/id_rsa"

[database]
192.168.1.134 ansible_user=vagrant ansible_ssh_private_key_file="--private-key .ssh/id_rsa"

Obrigado.