Puppet module: mysql

This is a Puppet mysql module from the second generation of Example42 Puppet Modules.

Made by Alessandro Franceschi / Lab42

Official git repository: http://github.com/example42/puppet-mysql

Released under the terms of Apache 2 License.

This module requires functions provided by the Example42 Puppi module.

For detailed info about the logic and usage patterns of Example42 modules read README.usage on Example42 main modules set.

USAGE - Module specific

Set a specific (cleartext) mysql root password

class { "mysql":
  root_password => 'mys4cr3',
}

Set a random password ( saved in /root/.my.cnf )
```
class { "mysql":
  root_password => 'auto',
}
```
Create a new grant and database

Create database and manage GRANT

The simplest way to create database is the following.

    mysql::grant { 'db1':
      mysql_user     => 'myusername',
      mysql_password => 'mypassword',
    }

This will create a MySQL database named 'db1' with a MySQL grant allowing full access to user 'myusername' with 'mypassword' password on local host.

Customize host source

If you want to customize the host the new user can connect from you have to use the 'mysql_host'.

    mysql::grant { 'db1':
      mysql_user     => 'myusername',
      mysql_password => 'mypassword',
      mysql_host     => '10.42.42.0/255.255.255.0',
    }

Here the whole 10.42.42.0/24 can connect.

Customize privileges

For privileges customization there is the 'mysql_privileges' parameter.

    mysql::grant { 'db1':
      mysql_user       => 'myusername',
      mysql_password   => 'mypassword',
      mysql_privileges => 'SELECT',
    }

The default grant privileges is 'ALL'.

Remove GRANT

Like for standard puppet resource you can use the 'ensure' parameter in order to remove a grant.

    mysql::grant { 'db1':
      ensure         => 'absent',
      mysql_user     => 'myusername',
      mysql_password => 'mypassword',
    }

This will ensure the 'myusername@localhost' grant is absent but not the database.

Load initial data

The mysql_db_init_query_file is an optional parameter allowing to specify a sql file. The execution of this SQL file will be triger only once at the creation time.

    mysql::grant { 'db1':
      ensure                   => 'absent',
      mysql_user               => 'myusername',
      mysql_password           => 'mypassword',
      mysql_db_init_query_file => '/full/path/to/the/schema.sql',
    }

NOTE: The SQL file should already be uploaded on mysql server host.

USAGE - Basic management

Install mysql with default settings
```
class { "mysql": }
```
Disable mysql service.
```
class { "mysql":
  disable => true
}
```
Disable mysql service at boot time, but don't stop if is running.
```
class { "mysql":
  disableboot => true
}
```

Install a specific version of mysqlpackage

class { 'mysql':
  version => '1.0.1',
}

Remove mysql package
```
class { "mysql":
  absent => true
}
```
Enable auditing without without making changes on existing mysql configuration files
```
class { "mysql":
  audit_only => true
}
```

USAGE - Overrides and Customizations

Use custom sources for main config file

class { "mysql":
  source => [ "puppet:///modules/lab42/mysql/mysql.conf-${hostname}" , "puppet:///modules/lab42/mysql/mysql.conf" ],
}

Use custom source directory for the whole configuration dir

class { "mysql":
  source_dir       => "puppet:///modules/lab42/mysql/conf/",
  source_dir_purge => false, # Set to true to purge any existing file not present in $source_dir
}

Use custom template for main config file

class { "mysql":
  template => "example42/mysql/mysql.conf.erb",
}

Define custom options that can be used in a custom template without the need to add parameters to the mysql class

  class { "mysql":
    template => "example42/mysql/mysql.conf.erb",
    options  => {
      'LogLevel' => 'INFO',
      'UsePAM'   => 'yes',
    },
  }

Automaticallly include a custom subclass

class { "mysql:"
  my_class => 'mysql::example42',
}

USAGE - Hiera Support

Manage MySQL configuration using Hiera

mysql::template: 'modules/mysql/my.cnf.erb'
mysql::root_password: 'example42'
mysql::options:
  port: '3306'
  bind-address: '127.0.0.1'

Defining MySQL resources using Hiera

mysql::grant_hash:
  'db1':
    mysql_user: 'myusername'
    mysql_password: 'mypassword'
    mysql_host: '10.42.42.0/255.255.255.0'

USAGE - Example42 extensions management

Activate puppi (recommended, but disabled by default) Note that this option requires the usage of Example42 puppi module
```
  class { "mysql":
    puppi    => true,
  }
```
Activate puppi and use a custom puppi_helper template (to be provided separately with a puppi::helper define ) to customize the output of puppi commands
```
  class { "mysql":
    puppi        => true,
    puppi_helper => "myhelper",
  }
```
Activate automatic monitoring (recommended, but disabled by default) This option requires the usage of Example42 monitor and relevant monitor tools modules
```
  class { "mysql":
    monitor      => true,
    monitor_tool => [ "nagios" , "monit" , "munin" ],
  }
```

Activate automatic firewalling This option requires the usage of Example42 firewall and relevant firewall tools modules

  class { "mysql":
    firewall      => true,
    firewall_tool => "iptables",
    firewall_src  => "10.42.0.0/24",
    firewall_dst  => "$ipaddress_eth0",
  }