[chef] Re: knife search help when an attr is not defined

[Jesse Nelson < >]

your search is completing but your code is trying to access a key that doesn't exist while it runs over the results. node.transform is meant to iterate over a set of nodes and change some attributes. I don't think thats what you want to be doing here.

you can get the list of nodes with ami_id's from  knife search:

   

    knife search node "ec2:ami_id" -a ec2.ami_id

if you want ones that dont have this attrib you can try doing 

     knife search node  "*:*" -a ec2.ami_id

You can see that im using knife search's  -a (attribute) to scope the results and the default output formatter will display the fqdn. 

If you must use knife exec for this you can do it without using transform.

     knife exec -E 'search( :node, "*:*" ).each { |n| puts "#{n.name}: #{n.ec2.ami_id}" if n.has_key? "ec2" }'

- 

Jesse Nelson

On Wed, Feb 27, 2013 at 11:04 PM, < " target="_blank"> > wrote:

hi. i was trying to list out my nodes and their AMI IDs, but i have a few
nodes that have no ec2 attribute. they're probably nodes that failed their
first chef run and need to be cleaned out anyway. when the search runs into
a node that has no ec2 attr, the search bails out before it completes listing
everything:

$ knife exec -E 'nodes.transform("*:*") {|n| puts "#{n.name}: #{n.ec2.ami_id}" }'
web1.dev.dsnine.com: ami-xxxxxxxx
admin2.stg.dsnine.com: ami-xxxxxxxx
db2.stg.dsnine.com: ami-xxxxxxxx
web4.dev.dsnine.com: ami-xxxxxxxx
app1.stg.dsnine.com: ami-xxxxxxxx
ERROR: ArgumentError: Attribute ec2 is not defined!


is there a way to craft the search so the search completes? i tried checking
if n.ec2.nil?, but that didn't help:

$ knife exec -E 'nodes.transform("*:*") {|n| puts "#{n.name}: #{n.ec2.ami_id}" if not n.ec2.nil? }'
web1.dev.dsnine.com: ami-xxxxxxxx
admin2.stg.dsnine.com: ami-xxxxxxxx
db2.stg.dsnine.com: ami-xxxxxxxx
web4.dev.dsnine.com: ami-xxxxxxxx
app1.stg.dsnine.com: ami-xxxxxxxx
ERROR: ArgumentError: Attribute ec2 is not defined!

$ knife exec -E 'nodes.transform("*:*") {|n| puts "#{n.name}" if n.ec2.nil? }'
ERROR: ArgumentError: Attribute ec2 is not defined!

thanks,
kallen