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as far as I see from the module docs the right call is

class { 'mysql::server::backup':
  backupuser        => 'myuser',
  backuppassword    => 'mypassword',
  backupdir         => '/tmp/backups',
  provider          => 'xtrabackup',
  backuprotate      => 15,
  execpath          => '/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin',
  time              => ['23', '15'],
}

I am planning on having only one

Is the variable "$backups" defined in your create_resources line?

I changed it to

create_resources('class', {"mysql::backup::${backup_provider}" => $backup_config }, {})

And it works. Thanks!

I guess

class { "mysql::backup::${backup_provider}": * => $backup_config }

should do the same w/o

create_resources()

.. though I’d go with

include mysql::server::backup

which will use Hiera auto-parameter-lookup to fill the class parameters..

Will check that, thanks