Iterate a puppet resource collector - resources

Question

I am trying to develop a puppet class with a defined resource which creates the configuration for a website.
One of the things that the defined resource has to do is assign the IP address of the website to a dummy interface. Due to constraints of the project this is done with NetworkManager.
So I have to generate a file like
[connection]
id=dummydsr
uuid=50819d31-8967-4321-aa34-383f4a658789
type=dummy
interface-name=dummydsr
permissions=
[ipv4]
method=manual
#IP Addresses come here
ipaddress1=1.2.3.4/32
ipaddress2=5.6.7.8/32
ipaddress3=8.7.6.5/32
[ipv6]
method=ignore
There is to be a line ipaddressX=... for every instance of the defined resource.
My problem is how do I track the number of times the defined resource has been instantiated so I can somehow increment a counter and generate the ipaddress lines.
Or for each instantiated defined resource, append the IP address to an array which I can later use to build the file

Answer 1

If I understand you, and I'm not certain that I do, but I think you would want to do something like this:
define mytype(
Integer $count,
...
) {
file { 'some_network_manager_file':
content => template(...)
}
}
And then you would have a loop:
$mystuff.each |$count, $data| {
mytype { ...:
count => $count,
...
}
}
Key insight here may be that the each function has some magic in it that allows you to get the index if you need it, see also this answer.
Now I think that's how it will work, without me spending time researching NetworkManager. If you provide more of your code, I may be able to update this to be more helpful.

Answer 2

This is less than ideal since I would prefer to have it inside the defined resource, but since I instantiate the defined resource with the data from a hash I use said hash to iterate that part.
class xxx_corp_webserver (
Hash $websites ={}
){
create_resources('xxx_corp_webserver::website', $websites)
# This would be nicer inside the defined class, but I did not find any other way
# Build and array with the IP addresses which are for DSR
$ipaddresses = $websites.map | $r | {
if $r[1]['enabledsr'] {
$r[1]['ipaddress']
}
}
# For each DSR address add the line
$ipaddresses.each | Integer $index , String $ipaddress | {
$num = $index+1
file_line{"dummydsr-ipaddress${num}":
ensure => present,
path => '/etc/NetworkManager/system-connections/dummydsr',
line => "address${num} = ${ipaddress}/32",
match => "^address.* = ${ipaddress}/32",
after => '# IP Addresses come here',
notify => Service['NetworkManager'],
require => File['/etc/NetworkManager/system-connections/dummydsr'],
}
}
}