Puppet: mount a SAMBA share at boot

First, create a credentials file in your acme module:
acme\files\samba\myshare.smb.credentials
and inside put:

username=myuser
password=mypassword

I was unable to make it mount an unprotected share..... so just have it protected by username/password.

Then in your acme init.pp read a boolean

$acme_install_sambamyshare = any2bool(hiera('acme_install_sambamyshare', false)),

Create a samba.pp class (file):

# == Class: acme::samba
#
# Manages samba mounts
#
class acme::samba {
  if $acme::acme_install_sambamyshare {
    file { '/data/myshare/':
      ensure => directory,
      owner  =>"soa",
      group  =>'soa',
      mode   =>'0775',
    }

    file { '/etc/myshare.smb.credentials': source =>'puppet:///modules/acme/samba/myshare.smb.credentials', 
  owner => root,
      mode =>'0700', } ->
    mount { 'myshare':
      name    =>'/data/myshare/',
      atboot  =>'true',
      device  =>'//windowshost/sharedfolder',
      ensure  =>'mounted',
      fstype  =>'cifs',
      options =>"credentials=/etc/myshare.smb.credentials,rw,nounix,iocharset=utf8,file_mode=0777,dir_mode=0777",
      require => [Package['samba-client'], File['/data/myshare/'], File['/etc/myshare.smb.credentials']],
    }
  }

}

Don't forget to declare the samba class in your init.pp!

If you do cat /etc/fstab you should see something like this:

//windowshost/sharedfolder /data/myshare/ cifs credentials=/etc/myshare.smb.credentials,rw,nounix,iocharset=utf8,file_mode=0777,dir_mode=0777 0 0

See also here