Puppet lookup fails with expects a Stdlib::Port = Integer[0, 65535] value, got String

Question

I have a parameter of type Stdlib::Port which I would like to set via the lookup function in my yaml-file.

manifest:

class module1(
  Integer $logging_filesize,
  Optional[Stdlib::Port] $server_port,
) {
...
}

yaml:

---
public:
  port_1: 8080
  port_2: 443

module1::server_port: "%lookup('public.port_1')"

But I get the following error:

Error: Evaluation Error: Error while evaluating a Function Call, Class[module1]: parameter 'server_port' expects a Stdlib::Port = Integer[0, 65535] value, got String (line: 1, column: 35) on node xxxx

unfortunately a convert_to of the parameter did not work

lookup_options:
  module1::server_port:
    convert_to: "Integer"

Answer 1

If it is the same YAML document, you could alias keys. In Puppet there is also an alias function.

---
public:
  port_1: 8080
  port_2: 443

module1::server_port: "%alias('public.port_1')"

Note, although the " delimiter usually suggest a string value, the alias interpolation function is special: If there is only an %alias{…} within a value, the data type of the aliased value is preserved.