[chef] Re: Issue with changing nodes run_list from command line using "knife exec -E"

[Daniel DeLeo < >]

On Monday, January 5, 2015 at 4:55 AM, 

 
 wrote:

> Hi guys,
>  
> What I need is to change nodes run_list basing on their tags and roles and 
> names etc.  
>  
> For example I have multiple nodes with different roles etc.
>  
> And I would like to assign some particular recipe to nodes which met some 
> condition:
>  
> knife exec -E "nodes.find(:name => '*isec*') { |node| node.run_list << 
> "recipe[foo]"; n.save }"
>  
> It will work for nodes which have *isec* in its names.  
>  
>  
> But what if I would like to use query something like:
>  
> knife exec -E "nodes.find(:name => '*isec*' AND :tags => 'tag_name' AND 
> :role => 'role_name') { |node| node.run_list << "recipe[foo]"; n.save }"
You’re mixing ruby syntax and Solr query syntax here. If you want all the 
conditions to be AND’ed together, then you can pass a regular ruby Hash 
object, e.g., :name => “NAME_QUERY”, :tags => “TAG_QUERY”, …  
If you instead need to do something more complicated, you can pass a string 
to `nodes.find` using the same syntax as you would with `knife search`.

For reference, the code that generates the query from the `nodes.find` call 
is here: 
https://github.com/opscode/chef/blob/005f75e158ce702bb28fd6199e9654b3d1115d3b/lib/chef/shell/model_wrapper.rb#L86-L92

HTH,

--  
Daniel DeLeo