Ansible Role Mysql

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Ansible Role: MySQL


Installs and configures MySQL or MariaDB server on RHEL/CentOS or Debian/Ubuntu servers.


No special requirements; note that this role requires root access, so either run it in a playbook with a global become: yes, or invoke the role in your playbook like:

- hosts: database
    - role: geerlingguy.mysql
      become: yes

Role Variables

Available variables are listed below, along with default values (see defaults/main.yml):

mysql_user_home: /root
mysql_user_name: root
mysql_user_password: root

The home directory inside which Python MySQL settings will be stored, which Ansible will use when connecting to MySQL. This should be the home directory of the user which runs this Ansible role. The mysql_user_name and mysql_user_password can be set if you are running this role under a non-root user account and want to set a non-root user.

mysql_root_home: /root
mysql_root_username: root
mysql_root_password: root

The MySQL root user account details.

mysql_root_password_update: false

Whether to force update the MySQL root user's password. By default, this role will only change the root user's password when MySQL is first configured. You can force an update by setting this to yes.

Note: If you get an error like ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES) after a failed or interrupted playbook run, this usually means the root password wasn't originally updated to begin with. Try either removing the .my.cnf file inside the configured mysql_user_home or updating it and setting password='' (the insecure default password). Run the playbook again, with mysql_root_password_update set to yes, and the setup should complete.

Note: If you get an error like ERROR 1698 (28000): Access denied for user 'root'@'localhost' (using password: YES) when trying to log in from the CLI you might need to run as root or sudoer.

mysql_enabled_on_startup: true

Whether MySQL should be enabled on startup.

mysql_config_file: *default value depends on OS*
mysql_config_include_dir: *default value depends on OS*

The main my.cnf configuration file and include directory.

overwrite_global_mycnf: true

Whether the global my.cnf should be overwritten each time this role is run. Setting this to no tells Ansible to only create the my.cnf file if it doesn't exist. This should be left at its default value (yes) if you'd like to use this role's variables to configure MySQL.

mysql_config_include_files: []

A list of files that should override the default global my.cnf. Each item in the array requires a "src" parameter which is a path to a file. An optional "force" parameter can force the file to be updated each time ansible runs.

mysql_databases: []

The MySQL databases to create. A database has the values name, encoding (defaults to utf8), collation (defaults to utf8_general_ci) and replicate (defaults to 1, only used if replication is configured). The formats of these are the same as in the mysql_db module.

You can also delete a database (or ensure it's not on the server) by setting state to absent (defaults to present).

mysql_users: []

The MySQL users and their privileges. A user has the values:

  • name
  • host (defaults to localhost)
  • password (can be plaintext or encrypted—if encrypted, set encrypted: yes)
  • encrypted (defaults to no)
  • priv (defaults to *.*:USAGE)
  • append_privs (defaults to no)
  • state (defaults to present)

The formats of these are the same as in the mysql_user module.

  - mysql
  - mysql-server

(OS-specific, RedHat/CentOS defaults listed here) Packages to be installed. In some situations, you may need to add additional packages, like mysql-devel.

mysql_enablerepo: ""

(RedHat/CentOS only) If you have enabled any additional repositories (might I suggest geerlingguy.repo-epel or geerlingguy.repo-remi), those repositories can be listed under this variable (e.g. remi,epel). This can be handy, as an example, if you want to install later versions of MySQL.

mysql_python_package_debian: python3-mysqldb

(Ubuntu/Debian only) If you need to explicitly override the MySQL Python package, you can set it here. Set this to python-mysqldb if using older distributions running Python 2.

mysql_port: "3306"
mysql_bind_address: ''
mysql_datadir: /var/lib/mysql
mysql_socket: *default value depends on OS*
mysql_pid_file: *default value depends on OS*

Default MySQL connection configuration.

mysql_log_file_group: mysql *adm on Debian*
mysql_log: ""
mysql_log_error: *default value depends on OS*
mysql_syslog_tag: *default value depends on OS*

MySQL logging configuration. Setting `mysql_log` (the general query log) or `mysql_log_error` to `syslog` will make MySQL log to syslog using the `mysql_syslog_tag`.

mysql_slow_query_log_enabled: false
mysql_slow_query_log_file: *default value depends on OS*
mysql_slow_query_time: 2

Slow query log settings. Note that the log file will be created by this role, but if you're running on a server with SELinux or AppArmor, you may need to add this path to the allowed paths for MySQL, or disable the mysql profile. For example, on Debian/Ubuntu, you can run sudo ln -s /etc/apparmor.d/usr.sbin.mysqld /etc/apparmor.d/disable/usr.sbin.mysqld && sudo service apparmor restart.

mysql_key_buffer_size: "256M"
mysql_max_allowed_packet: "64M"
mysql_table_open_cache: "256"

The rest of the settings in defaults/main.yml control MySQL's memory usage and some other common settings. The default values are tuned for a server where MySQL can consume 512 MB RAM, so you should consider adjusting them to suit your particular server better.

mysql_server_id: "1"
mysql_max_binlog_size: "100M"
mysql_binlog_format: "ROW"
mysql_expire_logs_days: "10"
mysql_replication_role: ''
mysql_replication_master: ''
mysql_replication_user: {}

Replication settings. Set mysql_server_id and mysql_replication_role by server (e.g. the master would be ID 1, with the mysql_replication_role of master, and the slave would be ID 2, with the mysql_replication_role of slave). The mysql_replication_user uses the same keys as individual list items in mysql_users, and is created on master servers, and used to replicate on all the slaves.

mysql_replication_master needs to resolve to an IP or a hostname which is accessable to the Slaves (this could be a /etc/hosts injection or some other means), otherwise the slaves cannot communicate to the master.

If the replication master has different IP addresses where you are running ansible and where the mysql replica is running, you can optionally specify a mysql_replication_master_inventory_host to access the machine (e.g. you run ansible on your local machine, but the mysql master and replica need to communicate on a different network)

Later versions of MySQL on CentOS 7

If you want to install MySQL from the official repository instead of installing the system default MariaDB equivalents, you can add the following pre_tasks task in your playbook:

    - name: Install the MySQL repo.
        state: present
      when: ansible_os_family == "RedHat"
    - name: Override variables for MySQL (RedHat).
        mysql_daemon: mysqld
        mysql_packages: ['mysql-server']
        mysql_log_error: /var/log/mysqld.err
        mysql_syslog_tag: mysqld
        mysql_pid_file: /var/run/mysqld/
        mysql_socket: /var/lib/mysql/mysql.sock
      when: ansible_os_family == "RedHat"

MariaDB usage

This role works with either MySQL or a compatible version of MariaDB. On RHEL/CentOS 7+, the mariadb database engine was substituted as the default MySQL replacement package. No modifications are necessary though all of the variables still reference 'mysql' instead of mariadb.

Ubuntu 14.04 and 16.04 MariaDB configuration

On Ubuntu, the package names are named differently, so the mysql_package variable needs to be altered. Set the following variables (at a minimum):

  - mariadb-client
  - mariadb-server
  - python-mysqldb


If you have ansible installed (e.g. pip3 install ansible), none.

If you have only installed ansible-core, be sure to require community.mysql in your collections/requirements.yml or install it manually with ansible-galaxy collection install community.mysql.

Example Playbook

- hosts: db-servers
  become: yes
    - vars/main.yml
    - { role: geerlingguy.mysql }

Inside vars/main.yml:

mysql_root_password: super-secure-password
  - name: example_db
    encoding: latin1
    collation: latin1_general_ci
  - name: example_user
    host: "%"
    password: similarly-secure-password
    priv: "example_db.*:ALL"



Author Information

This role was created in 2014 by Jeff Geerling, author of Ansible for DevOps.

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