Thanks John,
I actually got it working exactly using
hiera($users) and then defining a resource and passing the array to the
defined resource which makes it run for every element of the array.
I guess that was again one of your post, where you have described the
approach to perform iterations in puppet
http://www.mail-archive.com/[email protected]/msg29238.html
Can you please provide some good links to the tutorials where I can learn
more about using hiera, as it looks to me like one of the major souce of
externalizing data.
Thanks,
Nishant
.
On Friday, October 12, 2012 4:26:43 PM UTC-4, jcbollinger wrote:
>
>
>
> On Friday, October 12, 2012 9:52:01 AM UTC-5, Nishant Jain wrote:
>>
>> Hello jcbollinger,
>> I am actually trying to read the array into a
>> variable and passsing that variable as the content of a file like below,
>> file{'/tmp/nish_lat':
>> ensure=>file,
>> content=>hiera('users'),
>> }
>>
>>
>
> Yes, I gathered that from your earlier description. That directs Puppet
> to manage a file /tmp/nish_lat on the client, whose content is the string
> value of the object obtained by invoking hiera('users'). I inferred that
> you were doing that to check the value hiera was returning, hence I
> suggested a slightly less kludgy approach to that.
>
>
>
>> My intention was to just get a way to read the array
>> from a file, so that I can pass it to a define resource , where it can be
>> used to create a no of resources, as there are no loops available in puppet.
>>
>
>
> If you mean that was the purpose of the File resource then you going in a
> very wrong direction. Hiera itself is a way (a good one) to read an array
> from a file, as it seemed you understood.
>
>
>
>> I have tried using your method of notifying, but it sends out
>> an error
>> Error 400 on SERVER: Failed to parse inline template:
>> undefined method `join' for nil:NilClass
>>
>
>
> That error message suggests that Puppet variable $users is unset or
> explicitly set to nil. Either you missed the line that sets the $users
> variable (to the value returned by "hiera('users')"), or you changed your
> data or your hiera configuration, or you ran the test in a different
> context than your earlier one.
>
>
>
>>
>> I am actually new to puppet and my work as of now is to be
>> able to create a no of users on a machine based on the information passed
>> to it from a file.
>>
>
>
> The very simplest form of doing that in Puppet would be something like
> this:
>
> ######
> $users = hiera('users')
>
> user { $users: }
> ######
>
> That's far too simple for practical use, of course, but it demonstrates
> the basic idea of obtaining data from an external file (via hiera, in that
> case) and using it to declare possibly-multiple resources. There is also a
> variation that loads data as a hash of hashes and uses the
> create_resources() function instead of an explicit resource declaration:
>
> ######
> $users_hash = hiera('user_data')
>
> create_resources('user', $users_hash)
> ######
>
> Anything else is an embellishment on one of those basic themes.
>
> Note that managing the contents of a File resource cannot influence
> anything about other resources included in the target node's catalog. The
> catalog is compiled before any of its contents are applied (and on the
> master in a master / client setup), and that determines all the resources
> and their managed properties. I assumed you understood that, which is why
> I interpreted your File resource as a test mechanism. If you didn't know
> before then you do now.
>
>
> John
>
>
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