[chef] Re: Re: Re: Re: 'parameterize' recipies

[Joshua Miller < >]

wouldnt this be a good use for a data bag and a recipe that builds vsites 
based on it?


On Apr 8, 2010, at 11:38 AM, Daniel DeLeo wrote:

> The way that Chef encourages you do do this is to build up the list of
> items you want (vhosts in your example) and let Chef no-op on the
> items that are already in the desired state.
> 
> For example, have a look at:
> http://wiki.opscode.com/display/chef/Libraries#Libraries-AdvancedLibraryUsage
> 
> HTH,
> Dan DeLeo
> 
> On Thu, Apr 8, 2010 at 11:24 AM, erich oliphant
> <
 >
>  wrote:
>> Ok cool, so basically I'd use a script or something to update the attribute
>> then just rerun chef-client ?
>> 
>> On Thu, Apr 8, 2010 at 1:06 PM, Michael Hale 
>> <
 >
>>  wrote:
>>> 
>>> Yes Chef is idempotent given the same set of cookbooks, and
>>> attributes. You can make a cookbook do something different by changing
>>> the attributes.
>>> 
>>> For example take a look at the apache cookbook default recipe line 67:
>>> 
>>> http://github.com/opscode/cookbooks/blob/master/apache2/recipes/default.rb#L67
>>> 
>>> You'll notice that node[:apache][:dir] is evaluated to determine the
>>> directory where sites-available, sites-enabled, mods-available,
>>> mods-enabled will be created. If you wanted to you could change the
>>> value of the apache[:dir] attribute to say /home/erich/apache2, which
>>> would end up creating:
>>> 
>>> /home/erich/apache2/sites-available
>>> /home/erich/apache2/sites-enabled
>>> /home/erich/apache2/mods-available
>>> /home/erich/apache2/mods-enabled
>>> 
>>> On Thu, Apr 8, 2010 at 12:47 PM, erich oliphant
>>> <
 >
>>>  wrote:
>>>> Hi,
>>>> I am new to chef, have been through the examples,etc and have quick
>>>> question.  Running a recipe seems to be 'idempotent', you run it once it
>>>> does it's thing, if you rerun and the 'target' has not changed it won't
>>>> do
>>>> anything.  I am trying to understand how I can use chef for dynamic
>>>> provisioning.  For instance, I have an apache virtual server template,
>>>> but I
>>>> want to be able to run the same recipe but have it create a virtual host
>>>> at
>>>> 'foo.domain.com', whose DocumentRoot is '/vhosts/foo', etc based on
>>>> somehow
>>>> passing in 'foo' to the cookbook.
>>>> 
>>>> --
>>>> Erich Oliphant
>>>> 
>>>> "There are, in fact, two things, science and opinion, the former begets
>>>> knowledge, the latter ignorance"
>>>> -- Hippocrates of Cos
>>>> 
>> 
>> 
>> 
>> --
>> Erich Oliphant
>> 
>> "There are, in fact, two things, science and opinion, the former begets
>> knowledge, the latter ignorance"
>> -- Hippocrates of Cos
>>