[chef] Re: env_run_list vs run_list

[Noah Kantrowitz < >]

On Apr 20, 2012, at 12:57 PM, Sachin Sagar Rai wrote:

> I'm confused regarding the `env_run_lists` in the following 
> `roles/base.rb`. And this didn't 
> http://wiki.opscode.com/display/chef/Roles#Roles-envrunlists make me clear ;
> enough.
> 
>     name "base"
>     description "Base role applied to all nodes."
>     run_list(
>       "recipe[apt]",
>       "recipe[build-essential]",
>       "recipe[git]",
>       "recipe[zsh]",
>       "recipe[users::sysadmins]",
>       "recipe[sudo]",
>     )
> 
>     env_run_lists(
>       "production" => ["recipe[chef-client]"], 
>       "staging" => [])
>     )
>     
> When I run the `knife ec2 server create -E staging ....`, i.e. in the 
> `staging` environment, the node's run_list is blank.
> 
> Is this the expected behavior? I was thinking that the `env_run_lists` 
> items would be added up with the items in the above `run_list` items, just 
> like the rails app's `config/database.yml`

As mentioned on the wiki page, the env run list is an override, so it totally 
replaces the default non-env run list if the env matches. Otherwise there 
would be no way to remove items and ordering would be much harder to grok.

--Noah

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