[chef] Re: Wrapper Cookbook Attribute Overwrite Question

[Xabier de Zuazo < >]

On Thu, 12 Jun 2014 11:15:02 -0500
"David A. Williams" 
<
 >
 wrote:

> I'm setting up a wrapper cookbook to overwrite some node attributes.
> However it appears when that attribute is a hash it runs both
> configs.  Has anyone experienced this?
> 
> For example in my base cookbook, I have
> attributes/default.rb
> default['operations']['tomcat_instances']  = {:Dev  => { :port =>
> '80', :sites => %w[Dev] }}
> 
> And in my wrapper cookbook, I have
> recipes/raven_server.rb
> node.set['operations']['tomcat_instances'] = {:QA=> { :port =>
> '80', :sites => %w[Master Staging] }}
> 
> After the chef run.  I have two Tomcat instances set up instead of
> just one.

 That's because you are setting different attribute types (default vs.
 normal,set). In this case the Hashes are merged instead of replaced.

 You should use same attribute type like for example:

node.default['operations']['tomcat_instances']  = {
  :Dev  => { :port => '80', :sites => %w[Dev] }
}
# ...
node.default['operations']['tomcat_instances'] = {
  :QA=> { :port => '80', :sites => %w[Master Staging] }
}

 Or reset default attribute type:

node.default['operations']['tomcat_instances']  = {
  :Dev  => { :port => '80', :sites => %w[Dev] }
}
# ...
node.default['operations']['tomcat_instances'] = {}
node.set['operations']['tomcat_instances'] = {
 :QA=> { :port => '80', :sites => %w[Master Staging] }
}


 I know this can be confusing, but keep in mind that the attributes are
 of type Hash internally (Mash). These two things have the same effect:

node.set['operations']['tomcat_instances'] = {
 :QA=> { :port => '80', :sites => %w[Master Staging] }
}

node.set['operations']['tomcat_instances']['QA']['port'] = '80'
node.set['operations']['tomcat_instances']['QA']['sites'] = %w[
  Master
  Staging
]

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Xabier de Zuazo Oteiza
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