Adding an existing user to a group with puppet

If you declare users as virtual resources , you can then use ‘realize’ or the collection syntax ( User <| … |>). Here’s an example:

@user { 'foo':
  groups     => ['somegroup'],
  membership => minimum,
}

Then realize that virtual user with then collection syntax:

User <| title == foo |>

And elsewhere you can add to the parameters for that virtual resource using plusignment:

User <| title == foo |> { groups +> "svn" }