#MySQL

####Table of Contents

1. Overview
2. Module Description - What the module does and why it is useful
3. Setup - The basics of getting started with mysql
   • What mysql affects
   • Setup requirements
   • Beginning with mysql
4. Usage - Configuration options and additional functionality
5. Reference - An under-the-hood peek at what the module is doing and how
6. Limitations - OS compatibility, etc.
7. Development - Guide for contributing to the module

##Overview

The mysql module installs, configures, and manages the MySQL service.

##Module Description

The mysql module manages both the installation and configuration of MySQL as well as extends Puppet to allow management of MySQL resources, such as databases, users, and grants.

##Backwards Compatibility

This module has just undergone a very large rewrite. Some new classes have been added, and many previous classes and configurations work differently than before. We've attempted to handle backwards compatibility automatically by adding a attempt_compatibility_mode parameter to the main mysql class. If you set this to 'true' it will attempt to map your previous parameters into the new mysql::server class.

#####WARNING

Compatibility mode may fail. It may eat your MySQL server. PLEASE test it before running it live, even if the test is just a no-op and manual comparison. Please be careful!

##Setup

###What MySQL affects

• MySQL package
• MySQL configuration files
• MySQL service

###Beginning with MySQL

If you just want a server installed with the default options you can run include '::mysql::server'.

If you need to customize options, such as the root password or /etc/my.cnf settings, then you must also pass in an override hash:

class { '::mysql::server':
  root_password    => 'strongpassword',
  override_options => { 'mysqld' => { 'max_connections' => '1024' } }
}

##Usage

All interaction for the server is done via mysql::server. To install the client you use mysql::client, and to install bindings you can use mysql::bindings.

###Overrides

The hash structure for overrides in mysql::server is as follows:

$override_options = {
  'section' => {
    'item'             => 'thing',
  }
}

For items that you would traditionally represent as:

[section]
thing = X

You can just make an entry like thing => true, thing => value, or thing => " in the hash. You can also pass an array thing => ['value', 'value2'] or even list each thing => value separately on separate lines. MySQL doesn't care if 'thing' is alone or set to a value; it'll happily accept both. To keep an option out of the my.cnf file, e.g. when using override_options to revert to a default value, you can pass thing => undef. If an option needs multiple instances, you can pass an array. For example

$override_options = {
  'mysqld' => {
    'replicate-do-db' => ['base1', 'base2'],
  }
}

will produce

[mysql]
replicate-do-db = base1
replicate-do-db = base2

###Custom configuration

To add custom MySQL configuration, drop additional files into /etc/mysql/conf.d/. Dropping files into conf.d allows you to override settings or add additional ones, which is helpful if you choose not to use override_options in mysql::server. The conf.d location is hardcoded into the my.cnf template file.

##Reference

###Classes

####Public classes

• mysql::server: Installs and configures MySQL.
• mysql::server::account_security: Deletes default MySQL accounts.
• mysql::server::monitor: Sets up a monitoring user.
• mysql::server::mysqltuner: Installs MySQL tuner script.
• mysql::server::backup: Sets up MySQL backups via cron.
• mysql::bindings: Installs various MySQL language bindings.
• mysql::client: Installs MySQL client (for non-servers).

####Private classes

• mysql::server::install: Installs packages.
• mysql::server::config: Configures MYSQL.
• mysql::server::service: Manages service.
• mysql::server::root_password: Sets MySQL root password.
• mysql::server::providers: Creates users, grants, and databases.
• mysql::bindings::java: Installs Java bindings.
• mysql::bindings::perl: Installs Perl bindings.
• mysql::bindings::python: Installs Python bindings.
• mysql::bindings::ruby: Installs Ruby bindings.
• mysql::client::install: Installs MySQL client.

###Parameters

####mysql::server

#####root_password

The MySQL root password. Puppet will attempt to set the root password and update /root/.my.cnf with it.

#####old_root_password

The previous root password (REQUIRED if you wish to change the root password via Puppet.)

#####override_options

The hash of override options to pass into MySQL. It can be structured like a hash in the my.cnf file, so entries look like

$override_options = {
  'section' => {
    'item'             => 'thing',
  }
}

For items that you would traditionally represent as:

[section]
thing = X

You can just make an entry like thing => true, thing => value, or thing => " in the hash. You can also pass an array thing => ['value', 'value2'] or even list each thing => value separately on separate lines. MySQL doesn't care if 'thing' is alone or set to a value; it'll happily accept both. To keep an option out of the my.cnf file, e.g. when using override_options to revert to a default value, you can pass thing => undef.

#####config_file

The location of the MySQL configuration file.

#####manage_config_file

Whether the MySQL configuration file should be managed.

#####purge_conf_dir

Whether the conf.d directory should be purged.

#####restart

Whether the service should be restarted when things change.

#####root_group

What is the group used for root?

#####package_ensure

What to set the package to. Can be 'present', 'absent', or 'x.y.z'.

#####package_name

The name of the mysql server package to install.

#####remove_default_accounts

Boolean to decide if we should automatically include mysql::server::account_security.

#####service_enabled

Boolean to decide if the service should be enabled.

#####service_manage

Boolean to decide if the service should be managed.

#####service_name

The name of the mysql server service.

#####service_provider

The provider to use to manage the service.

#####users

Optional hash of users to create, which are passed to mysql_user.

$users = {
  'someuser@localhost' => {
    ensure                   => 'present',
    max_connections_per_hour => '0',
    max_queries_per_hour     => '0',
    max_updates_per_hour     => '0',
    max_user_connections     => '0',
    password_hash            => '*F3A2A51A9B0F2BE2468926B4132313728C250DBF',
  },
}

#####grants

Optional hash of grants, which are passed to mysql_grant.

$grants = {
  'someuser@localhost/somedb.*' => {
    ensure     => 'present',
    options    => ['GRANT'],
    privileges => ['SELECT', 'INSERT', 'UPDATE', 'DELETE'],
    table      => 'somedb.*',
    user       => 'someuser@localhost',
  },
}

#####databases

Optional hash of databases to create, which are passed to mysql_database.

$databases = {
  'somedb' => {
    ensure  => 'present',
    charset => 'utf8',
  },
}

####mysql::server::backup

#####backupuser

MySQL user to create for backups.

#####backuppassword

MySQL user password for backups.

#####backupdir

Directory to back up into.

#####backupdirmode

Permissions applied to the backup directory. This parameter is passed directly to the file resource.

#####backupdirowner

Owner for the backup directory. This parameter is passed directly to the file resource.

#####backupdirgroup

Group owner for the backup directory. This parameter is passed directly to the file resource.

#####backupcompress

Boolean to determine if backups should be compressed.

#####backuprotate

How many days to keep backups for.

#####delete_before_dump

Boolean to determine if you should cleanup before backing up or after.

#####backupdatabases

Array of databases to specifically back up.

#####file_per_database

Whether a separate file be used per database.

#####ensure

Allows you to remove the backup scripts. Can be 'present' or 'absent'.

#####execpath

Allows you to set a custom PATH should your mysql installation be non-standard places. Defaults to /usr/bin:/usr/sbin:/bin:/sbin

#####time

An array of two elements to set the backup time. Allows ['23', '5'] or ['3', '45'] for HH:MM times.

#####postscript

A script that is executed at when the backup is finished. This could be used to (r)sync the backup to a central store. This script can be either a single line that is directly executed or a number of lines, when supplied as an array. It could also be one or more externally managed (executable) files.

####mysql::server::monitor

#####mysql_monitor_username

The username to create for MySQL monitoring.

#####mysql_monitor_password

The password to create for MySQL monitoring.

#####mysql_monitor_hostname

The hostname to allow to access the MySQL monitoring user.

####mysql::bindings

#####java_enable

Boolean to decide if the Java bindings should be installed.

#####perl_enable

Boolean to decide if the Perl bindings should be installed.

#####php_enable

Boolean to decide if the PHP bindings should be installed.

#####python_enable

Boolean to decide if the Python bindings should be installed.

#####ruby_enable

Boolean to decide if the Ruby bindings should be installed.

#####java_package_ensure

What to set the package to. Can be 'present', 'absent', or 'x.y.z'.

#####java_package_name

The name of the package to install.

#####java_package_provider

What provider should be used to install the package.

#####perl_package_ensure

What to set the package to. Can be 'present', 'absent', or 'x.y.z'.

#####perl_package_name

The name of the package to install.

#####perl_package_provider

What provider should be used to install the package.

#####python_package_ensure

What to set the package to. Can be 'present', 'absent', or 'x.y.z'.

#####python_package_name

The name of the package to install.

#####python_package_provider

What provider should be used to install the package.

#####ruby_package_ensure

What to set the package to. Can be 'present', 'absent', or 'x.y.z'.

#####ruby_package_name

The name of the package to install.

#####ruby_package_provider

What provider should be used to install the package.

####mysql::client

#####bindings_enable

Boolean to automatically install all bindings.

#####package_ensure

What to set the package to. Can be 'present', 'absent', or 'x.y.z'.

#####package_name

What is the name of the mysql client package to install.

###Defines

####mysql::db

Creates a database with a user and assigns some privileges.

    mysql::db { 'mydb':
      user     => 'myuser',
      password => 'mypass',
      host     => 'localhost',
      grant    => ['SELECT', 'UPDATE'],
    }

Or using a different resource name with exported resources,

    @@mysql::db { "mydb_${fqdn}":
      user     => 'myuser',
      password => 'mypass',
      dbname   => 'mydb',
      host     => ${fqdn},
      grant    => ['SELECT', 'UPDATE'],
      tag      => $domain,
    }

Then collect it on the remote DB server.

    Mysql::Db <<| tag == $domain |>>

###Providers

####mysql_database

mysql_database can be used to create and manage databases within MySQL.

mysql_database { 'information_schema':
  ensure  => 'present',
  charset => 'utf8',
  collate => 'utf8_swedish_ci',
}
mysql_database { 'mysql':
  ensure  => 'present',
  charset => 'latin1',
  collate => 'latin1_swedish_ci',
}

####mysql_user

mysql_user can be used to create and manage user grants within MySQL.

mysql_user { 'root@127.0.0.1':
  ensure                   => 'present',
  max_connections_per_hour => '0',
  max_queries_per_hour     => '0',
  max_updates_per_hour     => '0',
  max_user_connections     => '0',
}

####mysql_grant

mysql_grant can be used to create grant permissions to access databases within MySQL. To use it you must create the title of the resource as shown below, following the pattern of username@hostname/database.table:

mysql_grant { 'root@localhost/*.*':
  ensure     => 'present',
  options    => ['GRANT'],
  privileges => ['ALL'],
  table      => '*.*',
  user       => 'root@localhost',
}

##Limitations

This module has been tested on:

• RedHat Enterprise Linux 5/6
• Debian 6/7
• CentOS 5/6
• Ubuntu 12.04

Testing on other platforms has been light and cannot be guaranteed.

#Development

Puppet Labs modules on the Puppet Forge are open projects, and community contributions are essential for keeping them great. We can’t access the huge number of platforms and myriad of hardware, software, and deployment configurations that Puppet is intended to serve.

We want to keep it as easy as possible to contribute changes so that our modules work in your environment. There are a few guidelines that we need contributors to follow so that we can have a chance of keeping on top of things.

You can read the complete module contribution guide on the Puppet Labs wiki.

Authors

This module is based on work by David Schmitt. The following contributors have contributed patches to this module (beyond Puppet Labs):

• Larry Ludwig
• Christian G. Warden
• Daniel Black
• Justin Ellison
• Lowe Schmidt
• Matthias Pigulla
• William Van Hevelingen
• Michael Arnold
• Chris Weyl