Issue #7770 has been updated by jared jennings.

I was using noop (dummy) providers, as I found suggested in #2384. Using 
2.7.18, not only did I get warnings about multiple default providers, but 
worse, Puppet would choose the dummy about half the time, unpredictably. But 
the fix for #6907 appears to have made it so I no longer need the dummy 
providers.
----------------------------------------
Bug #7770: warning: Found multiple default providers
https://projects.puppetlabs.com/issues/7770#change-72371

Author: Adam Gandelman
Status: Accepted
Priority: Normal
Assignee: Dan Bode
Category: agent
Target version: 
Affected Puppet version: 2.6.4
Keywords: 
Branch: 


Using a noop provider to work around suitability checks for commands from 
yet-to-be installed packages, causes a warning about multiple providers during 
runs when the package is actually installed.  If the package is not installed 
before the run, there are no warnings and the package is later installed.

<pre>
# lib/puppet/type/nova_admin.rb
Puppet::Type.newtype(:nova_admin) do
  @doc = "Manage createion/deletion of nova admin users."
  ensurable
  newparam(:name) do
    desc "The name of the admins."
  end
end
</pre>

<pre>
# lib/puppet/provider/nova_admin/default.pp
Puppet::Type.type(:nova_admin).provide(:default) do
  desc "This is a default provider that does nothing. This allows us to install 
nova-manage on the same puppet run where we want to use it."
  def create
    return false
  end
  def destroy
    return false
  end
  def exists?
    fail('This is just the default provider for nova_admin, all it does is 
fail')
  end
end
</pre>

<pre>
# lib/puppet/provider/nova_admin/nova_admin.pp
Puppet::Type.type(:nova_admin).provide(:admin) do
  desc "Manage nova admin user "
  commands :nova_manage => 'nova-manage'
  def exists?
    nova_manage("user", "list").match(/^#{resource[:name]}$/)
  end
  def create
    nova_manage("user", "admin", resource[:name])
  end
  def destroy
    nova_manage("user", "delete", resource[:name])
  end
end
</pre>

<pre>
# admin.pp
class nova::manage::admin ( $username ) {
  nova_admin{ $username:
    ensure => present,
    provider => 'admin',
    notify => Exec["nova-db-sync"],
    require => Class["nova::db"],
  }
}
</pre>

<pre>
warning: Found multiple default providers for nova_admin: admin, default; using 
admin
</pre>




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