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

[Daniel DeLeo < >]

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
>