chef-The Node Object

What is the Node Object?

Node vs Node Object

A node is defined as any physical or virtual machine that is configured

to be maintained by Chef.

− At the Gap, a virtual machine can be Vmware, Openstack, Vagrant or even

Docker

− If it runs chef-client, it is a Node.

The Node Object is the representation of that Node inside of Chef

− The node object can be described as a collection of attributes

− The node object can be represented in Ruby, JSON or YMAL

Nodes in Chef

Every Node must have a unique name within an Organization

§ Chef defaults to the Fully Qualified Domain Name of the machine.

§ For the purposes of this class, we have overridden the default

behavior and given the node a short name (node1) to make the typing

easier. (You’re welcome)

At Gap, node name should follow the naming convention

List all nodes in the Organization using

knife

knife node list

List all clients in the Organization using

knife

knife client list

List all Attributes on our Node

knife node show node1 -l

Run Ohai on your Node

sudo ohai | less

{

"kernel": {

"name": "Linux",

"release": "2.6.32-504.1.3.el6.x86_64",

"version": "#1 SMP Tue Nov 11 17:57:25 UTC 2014",

"machine": "x86_64",

"os": "GNU/Linux",

"modules": {

"nls_utf8": {

"size": "1455",

"refcount": "0”

},

"ipt_REJECT”:

Can I see the node data in JSON? YAML?

kknife node show node1 -Fj

{

"name": "node1",

"chef_environment": "_default",

"run_list": [

"recipe[mysite]”

],

"normal": {

"tags": [

]

}

}

Show only the Fully Qualified Domain Name

knife node show node1 -a fqdn

node1:

fqdn: node1.novalocal

Show only the Fully Qualified Domain Name

knife search node '*:*' -a fqdn

1 items found

node1:

fqdn: node1.novalocal