[chef] How to search node info in the chef server

[Sam Su < >]

Hi,

I want to get a node list with role[os-controller] in it's run list, so I tried "knife search" command at my chef server CML however I got a weird result as follow:
~]# knife search node role:os-controller
2 items found

Node Name:   centos-10-145-88-153
Environment: _default
FQDN:       
IP:          10.145.88.153
Run List:    recipe[keepalived], recipe[haproxy::tcp_lb]
Roles:      
Recipes:     keepalived, haproxy::tcp_lb, keepalived::default, haproxy::install_package
Platform:    centos 6.5
Tags:       

Node Name:   centos-10-145-88-152
Environment: testing
FQDN:       
IP:          10.145.88.152
Run List:    recipe[keepalived], recipe[haproxy::tcp_lb], role[os-controller]
Roles:      
Recipes:     keepalived, haproxy::tcp_lb, keepalived::default, haproxy::install_package
Platform:    centos 6.5
Tags:       

~]#

In my understanding, chef server should only return one node info with role[os-controller] (here is centos-10-145-88-152), but it return two nodes. I have no idea how to figure it out.

If someone can point it out, it will be much appreciated.

Thanks,

Sam