Ansible Install MySql 5.7 - Set Root User Password - mysql

Question

I've recently upgraded my vagrant from ubuntu/trusty-64 to bento/ubuntu-16.04. With that MySQL was updated to 5.7. I've made several updates to my playbook, but I keep getting stuck when setting the root user's password.
In the past (before 5.7) the following was sufficient:
- name: MySQL | Set the root password.
mysql_user:
name=root
host=localhost
password={{ mysql_root_password }}
become: true
In my playbook this is tested by attempting to delete an anonymous user.
- name: MySQL | Delete anonymous MySQL server user for {{ server_hostname }}
mysql_user:
name=""
host="{{ server_hostname }}"
state="absent"
login_user=root
login_password={{ mysql_root_password }}
However, now my playbook fails at this step, returning:
"Access denied for user 'root'#'localhost'"
TASK [mysql : MySQL | Delete anonymous MySQL server user for vagrant] **********
task path: /Users/jonrobinson/vagrant/survey/playbooks/roles/mysql/tasks/mysql.yml:51
fatal: [vagrant]: FAILED! => {"changed": false, "failed": true, "msg": "unable to connect to database, check login_user and login_password are correct or /home/vagrant/.my.cnf has the credentials. Exception message: (1698, \"Access denied for user 'root'#'localhost'\")"}
I've tried several things:
Setting the password blank for root user mysql_root_password=""
Attempting to delete the root user then recreate it with Ansible. I get same error probably because it's trying to act at the root user.
Manually updating the root password in mysql. - This also doesn't appear to work (password isn't recognized) unless I delete the root user and recreate it with all the permissions. Just updating the root user password appears to have no change.
My Full MySQL YAML:
---
- name: MySQL | install mysql packages
apt: pkg={{ item }} state=installed
become: true
with_items:
- mysql-client
- mysql-common
- mysql-server
- python-mysqldb
- name: MySQL | create MySQL configuration file
template:
src=my.cnf.j2
dest=/etc/mysql/my.cnf
backup=yes
owner=root
group=root
mode=0644
become: true
- name: MySQL | create MySQLD configuration file
template:
src=mysqld.cnf.j2
dest=/etc/mysql/conf.d/mysqld.cnf
backup=yes
owner=root
group=root
mode=0644
become: true
- name: MySQL | restart mysql
service: name=mysql state=restarted
become: true
- name: MySQL | Set the root password.
mysql_user:
name=root
host=localhost
password={{ mysql_root_password }}
become: true
- name: MySQL | Config for easy access as root user
template: src=mysql_root.my.cnf.j2 dest=/root/.my.cnf
become: true
- name: MySQL | Config for easy access as root user
template: src=mysql_root.my.cnf.j2 dest={{ home_dir }}/.my.cnf
when: "'{{ user }}' != 'root'"
- name: MySQL | Delete anonymous MySQL server user for {{ server_hostname }}
mysql_user: name="" host="{{ server_hostname }}" state="absent" login_user=root login_password={{ mysql_root_password }}
- name: MySQL | Delete anonymous MySQL server user for localhost
mysql_user: name="" state="absent" host=localhost login_user=root login_password={{ mysql_root_password }}
- name: MySQL | Secure the MySQL root user for IPV6 localhost (::1)
mysql_user: name="root" password="{{ mysql_root_password }}" host="::1" login_user=root login_password={{ mysql_root_password }}
- name: MySQL | Secure the MySQL root user for IPV4 localhost (127.0.0.1)
mysql_user: name="root" password="{{ mysql_root_password }}" host="127.0.0.1" login_user=root login_password={{ mysql_root_password }}
- name: MySQL | Secure the MySQL root user for localhost domain (localhost)
mysql_user: name="root" password="{{ mysql_root_password }}" host="localhost" login_user=root login_password={{ mysql_root_password }}
- name: MySQL | Secure the MySQL root user for {{ server_hostname }} domain
mysql_user: name="root" password="{{ mysql_root_password }}" host="{{ server_hostname }}" login_user=root login_password={{ mysql_root_password }}
- name: MySQL | Remove the MySQL test database
mysql_db: db=test state=absent login_user=root login_password={{ mysql_root_password }}
- name: MySQL | create application database user
mysql_user: name={{ dbuser }} password={{ dbpass }} priv=*.*:ALL host='%' state=present login_password={{ mysql_root_password }} login_user=root
- name: MySQL | restart mysql
service: name=mysql state=restarted
become: true

Answer 1

I was able to figure it out. The gist of the problem had to do with mysql 5.7 using auth_socket for the root user when no password is provided. See the following: "That plugin doesn’t care and doesn’t need a password. It just checks if the user is connecting using a UNIX socket and then compares the username. "
When this is the case you cannot update the password using:
SET PASSWORD FOR 'root'#'localhost' = PASSWORD('test');
And instead must use:
ALTER USER 'root'#'localhost' IDENTIFIED WITH mysql_native_password='test';
Solution 1: However, Ansible, as of version 2.0.2 didn't account for this. I was able to get around this by setting the password before MySql is installed
- name: Specify MySQL root password before installing
debconf: name='mysql-server' question='mysql-server/root_password' value='{{mysql_root_password | quote}}' vtype='password'
become: true
- name: Confirm MySQL root password before installing
debconf: name='mysql-server' question='mysql-server/root_password_again' value='{{mysql_root_password | quote}}' vtype='password'
become: true
- name: MySQL | install mysql packages
apt: pkg={{ item }} state=installed
become: true
with_items:
- mysql-client
- mysql-common
- mysql-server
- python-mysqldb
...
However, this has also since been addressed by Ansible
Solution 2: The easiest solution is just to upgrade Ansible to 2.2.1

Answer 2

From what I understand, in MySQL, changing the root password needs to be done for localhost, the server's hostname and 127.0.0.1 and also needs full privileges. Something along the these lines may help (Note: I've only tested this on MariaDB, and not MySQL):
tasks:
- name: Set a new root password
mysql_user: check_implicit_admin=yes
login_user=root
login_password={{ mysql_root_password }}
user=root
password={{ NEW_mysql_root_password }}
host={{ item }}
priv='*.*:ALL,GRANT'
with_items:
- localhost
- 127.0.0.1
- {{ server_hostname }}
notify:
- restart_mariadb
handlers:
- name: restart_mariadb
service: name=mariadb
state=restarted