Estou tendo um problema para criar o banco de dados MySql

TASK [Cria o banco do MySQL] *** fatal: [172.17.177.40]: FAILED! => {"changed": false, "msg": "unable to find /root/.my.cnf. Exception message: (2002, "Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)")"}

Playbook:
---
- hosts: all
  tasks:
    - name: 'Instala pacotes de dependencias do sistema operacional - SO'
      apt:
        name: "{{ item }}"
        state: latest
      become: yes
      with_items:
        - php5
        - apache2
        - libapache2-mod-php5
        - php5-gd
        - libssh2-php
        - php5-mcrypt
        - python-mysqldb
        - php5-mysql
    - name: 'Cria o banco do MySQL'
      mysql_db:
        login_user: root
        name: wordpress.db
        state: present
      become: yes