On Wednesday, February 6, 2013 11:10:28 AM UTC-6, David Kerr wrote:
>
>
>>> So you were looking for different nodes to export fragments with
>> different sequence numbers embedded in the content? That was SO never
>> going to work. Every node's catalog is compiled independently of all the
>> others'. Even collecting exported resources isn't really an exception to
>> that rule.
>>
>
> No, I had hoped that each node would export and then when it was realized
> the virtual resources on the Pool machine <<| |>>
> i would be able to latch onto that loop and generate a sequence then.
>
>
>> You could do what you wanted via exported resources if Puppet provided
>> for exporting data, but it does not. Only resources may be exported, and
>> there is no public API by which one resource implementation may interrogate
>> others.
>>
>
> It's kind of a bummer, because the data that I need is there. I just need
> to be able to count them.
>
>
>>
>> If you want to generate a sequence of consecutive numbers then it will
>> need to be done either manually (outside Puppet, at least) or all on one
>> node. Either form will be easier to manage if you centralize your data in
>> a class variable, hiera store, or similar. Supposing that by some means
>> you obtain a data structure similar to this:
>>
>> {
>> '192.168.1.10' => {
>> port => 5432,
>> weight = 1
>> data_directory = '/db/pg'
>> flag = 'ALLOW_TO_FAILOVER'
>> },
>> '192.168.1.11' => {
>> port => 5432,
>> weight = 1
>> data_directory = '/db/pg'
>> flag = 'ALLOW_TO_FAILOVER'
>> },
>> ...
>> }
>>
>> your pg server nodes can read their own, individual configuration
>> parameters from it (even to determining that they should *be* pg
>> servers), whereas the pool server can process the whole thing in one
>> template to produce the server section of the pool config file.
>>
>>
> I have:
> define pgpool::postgres_backend (
> $ipaddress = $::ipaddress,
> $environment = environment,
> $pgdata = '/db/pg',
> $pgport = '5432',
> ) { }
>
>
> and that gets called from each DB server:
> @@pgpool::postgres_backend { "$fqdn":
> ipaddress => "$ipaddress",
> environment => "$environment",
> }
>
> looping over that construct is what I'm not sure how to do.
>
As I said, Puppet provides no public API by which you could probe the
properties of the collected pgpool::postgres_backend instances. Nodes
cannot export data. I understand that your attempt is neat and tidy, but
you can't do it that way. That's why I recommended taking a different
approach.
John
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