Hi Peter,
Object.hash in Ruby provides the hash of the Object ID, not a consistent
cryptographic hash of the string provided.
Try it in two different IRB sessions and you'll see what I mean. It will
change between garbage collection runs and/or at every invocation of Puppet
if done in cron.
Trevor
On Tue, May 17, 2016 at 7:42 PM, p <pe...@poproj.com> wrote:
> Hi Everyone,
>
> My custom puppet code changes values randomly. Why?
>
> This code creates a random port for me based on the argument's hash. The
> idea is that this will create a TCP port for me based on the name of the
> argument I give it (for instance the FQDN) so that it is unique, above 1024
> but below 65535. I don't want to have to worry about port numbers, it
> should just calculate the same every time.
>
> module Puppet::Parser::Functions
> newfunction(:ip_port, :type => :rvalue) do |args|
> args[0].hash % 64511 + 1024
> end
> end
>
>
> I use it in a manifest this way:
> $ip_port = ip_port('www.example.com')
>
> The puppet agent runs every 30 minutes by default. It's a master/slave
> v3.8 setup. When I run it manually, the value always comes back the same.
> But when I leave it alone, at some point the value changes. I use this to
> create ports for haproxy. Thanks for your help.
>
>
> Peter
>
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--
Trevor Vaughan
Vice President, Onyx Point, Inc
(410) 541-6699 x788
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