Date: Fri, 2 Nov 2012 07:39:19 -0700 (PDT)
From: jcbollinger <John.Bollin...@stJude.org>
To: puppet-users@googlegroups.com
Message-Id: <7fe8c921-d163-4f3a-8366-13952a35c5bc@googlegroups.com>
In-Reply-To: <7f54c1b5-ce11-441f-9ff4-438d66e1cce2@googlegroups.com>
References: <7f54c1b5-ce11-441f-9ff4-438d66e1cce2@googlegroups.com>
Subject: Re: Dynamic list of files managed from hiera
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On Thursday, November 1, 2012 8:35:46 AM UTC-5, Guillem Liarte wrote:
>
>
> All,
>
> I use hiera in an straight way, for example:
>
> ---
> mode: '0644'
>
> that makes easy to do:
>
> file { somefile:
> mode => hiera('mode')
> }
>
>
> So far so good. But what about more complex structures? I would liek to be
> able to handle hashes of data like this:
>
> in yaml:
>
> ---
> file_list:
> - file1:
> fname: 'config.conf'
> fpath: '/path/to/destination/'
> fmode: '640'
> fowner: 'sam'
> fgroup: 'admin'
> - file2:
> fname: 'parameters.xml'
> fpath: '/path/to/destination/'
> fmode: '660'
> fowner: 'tom'
> fgroup: 'finance'
>
>
> Is it possible to handle this right now?
Yes. Hiera understands general YAML values (at least YAML 1.1; I don't
know about 1.2) associated with top-level scalar keys. Complex values are
presented in Puppet via the natural mapping to Puppet hashes and arrays,
nested as needed.
> What can I do in order to get a list of items that contain attributes? I
> understand taht this type of parsing happens for example when an ENC
> produces YAML in this way:
>
> clasees:
> myapp:
> parameter1: 'value1'
> parameter2: 'value2'
>
> Can I do something similar to this with puppet-hiera?
>
Again, yes. The only caveat here is that the top level of your data
document should associate values with scalar keys. Hiera looks up values
by those top-level keys.
>
> And also, is the a decent piece of *documentation* for hiera and
> hiera-puppet? there seems to be almost nothing but fragmented
> documentation. I am happy top read and research all this in my own but I
> have struggled finding documentation.
>
>
I am unaware of any comprehensive documentation for Hiera. Perhaps that
overstates the case a bit, though, as "comprehensive" suggests big and
complicated, and that's not a good characterization of Hiera.
If you have not already seen these documents, then you should read them:
https://github.com/puppetlabs/hiera (scroll down)
https://github.com/puppetlabs/hiera-puppet (scroll down)
http://puppetlabs.com/blog/first-look-installing-and-using-hiera/
Those should be enough to get anyone up and going with Hiera, but they do,
I think, miss details about some of Hiera's more advanced capabilities.
Until better documentation becomes available, this forum is a good place to
pose questions. And there's always the code, of course, which is fairly
small.
John
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<br><br>On Thursday, November 1, 2012 8:35:46 AM UTC-5, Guillem Liarte wrot=
e:<blockquote class=3D"gmail_quote" style=3D"margin: 0;margin-left: 0.8ex;b=
order-left: 1px #ccc solid;padding-left: 1ex;"><br>All,<br><br>I use hiera =
in an straight way, for example:<br><br>---<br>mode: '0644'<br><br>that mak=
es easy to do:<br><br>file { somefile:<br> mode =3D> =
hiera('mode')<br>} <br><br><br>So far so good. But what about more complex =
structures? I would liek to be able to handle hashes of data like this:<br>=
<br>in yaml:<br><br>---<br>file_list:<br> - file1:<br>&nb=
sp; fname: 'config.conf' <br> &nbs=
p; fpath: '/path/to/destination/'<br> f=
mode: '640'<br> fowner: 'sam'<br> =
fgroup: 'admin'<br> - file2:<br> =
fname: 'parameters.xml'<br> fpat=
h: '/path/to/destination/'<br> fmode: '=
660'<br> fowner: 'tom'<br> &=
nbsp; fgroup: 'finance'<br><br><br>Is it possible to handle thi=
s right now?</blockquote><div><br><br>Yes. Hiera understands general =
YAML values (at least YAML 1.1; I don't know about 1.2) associated with top=
-level scalar keys. Complex values are presented in Puppet via the na=
tural mapping to Puppet hashes and arrays, nested as needed.<br><br> <=
/div><blockquote class=3D"gmail_quote" style=3D"margin: 0;margin-left: 0.8e=
x;border-left: 1px #ccc solid;padding-left: 1ex;"> What can I do in order t=
o get a list of items that contain attributes? I understand taht this=
type of parsing happens for example when an ENC produces YAML in this way:=
<br><br>clasees:<br> myapp:<br> p=
arameter1: 'value1'<br> parameter2: 'value2'<=
br><br>Can I do something similar to this with puppet-hiera?<br></blockquot=
e><div><br><br>Again, yes. The only caveat here is that the top level=
of your data document should associate values with scalar keys. Hier=
a looks up values by those top-level keys.<br><br> </div><blockquote c=
lass=3D"gmail_quote" style=3D"margin: 0;margin-left: 0.8ex;border-left: 1px=
#ccc solid;padding-left: 1ex;"><br>And also, is the a decent piece of <b>d=
ocumentation</b> for hiera and hiera-puppet? there seems to be almost nothi=
ng but fragmented documentation. I am happy top read and research all this =
in my own but I have struggled finding documentation.<br><br></blockquote><=
div><br><br>I am unaware of any comprehensive documentation for Hiera. =
; Perhaps that overstates the case a bit, though, as "comprehensive" sugges=
ts big and complicated, and that's not a good characterization of Hiera.<br=
><br>If you have not already seen these documents, then you should read the=
m:<br><br>https://github.com/puppetlabs/hiera (scroll down)<br>https:=
//github.com/puppetlabs/hiera-puppet (scroll down)<br>http://puppetla=
bs.com/blog/first-look-installing-and-using-hiera/<br><br>Those should be e=
nough to get anyone up and going with Hiera, but they do, I think, miss det=
ails about some of Hiera's more advanced capabilities. Until better d=
ocumentation becomes available, this forum is a good place to pose question=
s. And there's always the code, of course, which is fairly small.<br>=
<br><br>John<br><br></div>
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Message from discussion Dynamic list of files managed from hiera
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