[chef] Re: Re: Re: Re: Re: Re: attributes inheritance

[Cassiano Leal < >]

Nice, so Chef really is doing something behind the scenes. Good to know! :)

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Cassiano Leal

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On July 23, 2013 at 09:38:26, Dorian Jaminais ( ) wrote:

Actually it works but I put the ||= operator in the recipe file and it works as expected

2013/7/23 Cassiano Leal < " target="_blank"> >

I don’t think that’ll work if the default has been set.

What I mean is, say you have:

node.default[:myapp][:part1][:conf] = ‘XXX’

node.set[:myapp][:part1][:conf] ||= ‘XXX1’

This will probably set node[:myapp][:part1][:conf] to ‘XXX1’, since node.set[:myapp][:part1][:conf] was nil when the ||= operator kicked in.

I might be wrong and Chef might be doing some sourcery behind the scenes, but taking only Ruby into account, it wouldn’t work.

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Cassiano Leal

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On July 23, 2013 at 05:21:59, Dorian Jaminais ( " target="_blank"> ) wrote:

@Josiah : Thanks for the tip, I didn't know about the ||= operator.

I was looking for a way to do that using the attribute files.

Based on your response, my new work around is to define the component's attributes in two different hashes and have them merge into the default one.

Thanks

2013/7/23 Josiah Kiehl < " target="_blank"> >

I would set this in the component's recipe:

node.normal[:myapp][:part1][:conf] ||= "XXX1"

||= will only set the attribute if the attribute has not yet been set.

On Mon, Jul 22, 2013 at 5:08 PM, Daniel DeLeo < " target="_blank"> > wrote:

On Monday, July 22, 2013 at 10:15 AM, Dorian Jaminais wrote:

Ohai Chefs !

Is there a way in an attribute file to reuse attributes from another file ?

Here is my use case :

I have an application split in two components, each requiring its configuration.

Most of thetime the configuration of both will be identical but this may not be always true.

For this reason I'd like to define 'default' attributes in the default attribute file and then have one attribute file per part of my application. Atribute would be organized this way :

default.rb

  default["myapp"]["conf"] = "XXX"

  default["myapp"]["truc"] = "YYY"
part1.rb
  default["myapp"]["part1"]["conf"] = "XXX1"
  #default["myapp"]["part1"]["truc"] = "YYY" < I want it to default to this value when not explicitly set
part2.rb
  default["myapp"]["part2"]["conf"] = "XXX2"

Is there a way to achieve this ?

At the moment I am using global variable to pass information from one file to the other but this seams ugly to me.

Split the shared part out into another cookbook? 

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Daniel DeLeo

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Dorian JAMINAIS

System Administrator
+33 6 95 10 95 37

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Dorian JAMINAIS

System Administrator
+33 6 95 10 95 37