[chef] Re: Error AWS AutoScale and rabbitmq

[Daniel Condomitti < >]

Sounds like that’s being overridden that in node attributes somehow. The default attributes[0] for that cookbook set a few attributes under kernel:

# Erlang kernel application options
	# See http://www.erlang.org/doc/man/kernel_app.html
	default['rabbitmq']['kernel']['inet_dist_listen_min'] = nil
	default['rabbitmq']['kernel']['inet_dist_listen_max'] = nil
	# Tell Erlang what IP to bind to
	default['rabbitmq']['kernel']['inet_dist_use_interface'] = nil

I would assume you’re setting that interface at least as the cookbook doesn’t attempt to determine that automatically as far as I can tell. Can you open chef-shell once it fails once being bootstrapped by AWS and see what node.rabbitmq.kernel actually is?

Dan

[0] https://github.com/kennonkwok/rabbitmq/blob/master/attributes/default.rb#L26-32

On Friday, August 8, 2014 at 10:38 AM, Liam Kirsher wrote:

Hope someone can help with this!
Converge fails when using AWS AutoScaling, but succeeds when doing a normal EC2 server create.
The source of the error is in the rabbitmq cookbook.  Somehow the hash that is expected for kernel (I believe this is Erlang kernel?) becomes an array.

Starting with "knife ec2 server create" the instance comes up fine.
Adding the same run_list to auto scale config, the converge fails.  I tried adding this to the node

override[:rabbitmq][:kernel] = {}

But that had no effect.
I did find someone else having a very similar issue installing with Vagrant, but there was no response.
https://github.com/kennonkwok/rabbitmq/issues/124

Any ideas?

 NoMethodError
  -------------
  undefined method `each_pair' for []:Array
 
  Cookbook Trace:
  ---------------
    /var/chef/cache/cookbooks/rabbitmq/libraries/default.rb:35:in `format_kernel_parameters'
    /var/chef/cache/cookbooks/rabbitmq/recipes/default.rb:174:in `from_file'
    /var/chef/cache/cookbooks/rabbitmq/recipes/default.rb:168:in `from_file'
    /var/chef/cache/cookbooks/bti_api/recipes/default.rb:10:in `from_file'
 
  Relevant File Content:
  ----------------------
  /var/chef/cache/cookbooks/rabbitmq/libraries/default.rb:
 
   28:        # This parameter is special and needs commas instead of periods.
   29:        rendered << "{inet_dist_use_interface, {#{kernel[:inet_dist_use_interface].gsub(/\./, ',')}}}" if kernel[:inet_dist_use_interface]
   30:        kernel.delete(:inet_dist_use_interface)
   31:  
   32:        # Otherwise, we can just render it nicely as Erlang wants. This
   33:        # theoretically opens the door for arbitrary kernel_app parameters to be
   34:        # declared.
   35>>       kernel.select { |k, v| !v.nil? }.each_pair do |param, val|
   36:          rendered << "{#{param}, #{val}}"
   37:        end
   38:  
   39:        rendered.each { |r| r.prepend('    ') }.join(",\n")
   40:      end
   41:    end
   42:  end
   43:  
 
 
  Running handlers:
[2014-08-07T22:21:09+00:00] ERROR: Running exception handlers
  Running handlers complete
[2014-08-07T22:21:09+00:00] ERROR: Exception handlers complete
[2014-08-07T22:21:09+00:00] FATAL: Stacktrace dumped to /var/chef/cache/chef-stacktrace.out
  Chef Client failed. 0 resources updated in 11.03884 seconds
[2014-08-07T22:21:09+00:00] INFO: Sending resource update report (run-id: 90aeb225-8af0-4f21-a901-98258173bc03)
[2014-08-07T22:21:10+00:00] ERROR: undefined method `each_pair' for []:Array
[2014-08-07T22:21:10+00:00] FATAL: Chef::Exceptions::ChildConvergeError: Chef run process exited unsuccessfully (exit code 1)

--  
Liam Kirsher
PGP: http://liam.numenet.com/pgp/