[chef] several questions regarding knife

[Kirill Timofeev < >]

Folks,

may I ask you to clarify the following:

1. Is it possible to use knife to find all nodes with certain role in 
run list and change this role to another role?
2. When I do "knife node run_list add some_node some_role" a recipe with 
name "some_role" is added to run list, not node, what do I need to add 
role and not recipe?
3. After doing previous step command "knife node run_list remove 
some_node some_role" doesn't remove newly added recipe with name 
"some_role", is this expected?
4. After changing manually roles on certain nodes from "old_role" to 
"new_role" I see via "knife search node "platform_version:10.04" that 
run list is ok, but roles still mention "old_role", why is this so?

I'm using latest chef server (11.06) and knife 10.18.0

Thanks,
Kirill.