Chef

Table Of Contents

knife node

A node is any machine—physical, virtual, cloud, network device, etc.—that is under management by Chef.

The knife node subcommand is used to manage the nodes that exist on a Chef server.

Note

Review the list of common options available to this (and all) knife subcommands and plugins.

bulk delete

Use the bulk delete argument to delete one or more nodes that match a pattern defined by a regular expression. The regular expression must be within quotes and not be surrounded by forward slashes (/).

Syntax

This argument has the following syntax:

$ knife node bulk delete REGEX

Options

This command does not have any specific options.

Examples

The following examples show how to use this knife subcommand:

Bulk delete nodes

Use a regular expression to define the pattern used to bulk delete nodes:

$ knife node bulk delete "^[0-9]{3}$"

Type Y to confirm a deletion.

create

Use the create argument to add a node to the Chef server. Node data is stored as JSON on the Chef server.

Syntax

This argument has the following syntax:

$ knife node create NODE_NAME

Options

This command does not have any specific options.

Examples

The following examples show how to use this knife subcommand:

Create a node

To add a node, enter:

$ knife node create node1

In the $EDITOR enter the node data in JSON:

## sample:
{
   "normal": {
   },
   "name": "foobar",
   "override": {
   },
   "default": {
   },
   "json_class": "Chef::Node",
   "automatic": {
   },
   "run_list": [
      "recipe[zsh]",
      "role[webserver]"
   ],
   "chef_type": "node"
}

When finished, save it.

delete

Use the delete argument to delete a node from the Chef server.

Note

Deleting a node will not delete any corresponding API clients.

Syntax

This argument has the following syntax:

$ knife node delete NODE_NAME

Options

This command does not have any specific options.

Examples

The following examples show how to use this knife subcommand:

Delete a node

$ knife node delete node_name

edit

Use the edit argument to edit the details of a node on a Chef server. Node data is stored as JSON on the Chef server.

Syntax

This argument has the following syntax:

$ knife node edit NODE_NAME (options)

Options

This argument has the following options:

-a, --all
Display a node in the $EDITOR. By default, attributes that are default, override, or automatic, are not shown.

Examples

The following examples show how to use this knife subcommand:

Edit a node

To edit the data for a node named node1, enter:

$ knife node edit node1 -a

Update the role data in JSON:

## sample:
{
   "normal": {
   },
   "name": "node1",
   "override": {
   },
   "default": {
   },
   "json_class": "Chef::Node",
   "automatic": {
   },
   "run_list": [
      "recipe[devops]",
      "role[webserver]"
   ],
   "chef_type": "node"
}

When finished, save it.

environment set

Use the environment set argument to set the environment for a node without editing the node object.

Syntax

This argument has the following syntax:

$ knife node environment_set NODE_NAME ENVIRONMENT_NAME (options)

Options

This command does not have any specific options.

Examples

None.

from file

Use the from file argument to create a node using existing node data as a template.

Syntax

This argument has the following syntax:

$ knife node from file FILE

Options

This command does not have any specific options.

Examples

The following examples show how to use this knife subcommand:

Create a node using a JSON file

To add a node using data contained in a JSON file:

$ knife node from file "path to JSON file"

list

Use the list argument to view all of the nodes that exist on a Chef server.

Syntax

This argument has the following syntax:

$ knife node list (options)

Options

This argument has the following options:

-w, --with-uri
Show the corresponding URIs.

Note

See knife.rb for more information about how to add certain knife options as settings in the knife.rb file.

Examples

The following examples show how to use this knife subcommand:

View a list of nodes

To verify the list of nodes that are registered with the Chef server, enter:

$ knife node list

to return something similar to:

i-12345678
rs-123456

run_list add

A run-list defines all of the information necessary for Chef to configure a node into the desired state. A run-list is:

  • An ordered list of roles and/or recipes that are run in the exact order defined in the run-list; if a recipe appears more than once in the run-list, the chef-client will not run it twice
  • Always specific to the node on which it runs; nodes may have a run-list that is identical to the run-list used by other nodes
  • Stored as part of the node object on the Chef server
  • Maintained using knife, and then uploaded from the workstation to the Chef server, or is maintained using the Chef management console

Use the run_list add argument to add run-list items (roles or recipes) to a node.

A run-list must be in one of the following formats: fully qualified, cookbook, or default. Both roles and recipes must be in quotes, for example:

'role[NAME]'

or

'recipe[COOKBOOK::RECIPE]'

Use a comma to separate roles and recipes when adding more than one item the run-list:

'recipe[COOKBOOK::RECIPE],COOKBOOK::RECIPE,role[NAME]'

Syntax

This argument has the following syntax:

$ knife node run_list add NODE_NAME RUN_LIST_ITEM (options)

Warning

When running knife in Microsoft Windows, a string may be interpreted as a wildcard pattern when quotes are not present in the command. The number of quotes to use depends on the shell from which the command is being run.

When running knife from the command prompt, a string should be surrounded by single quotes (' '). For example:

$ knife node run_list set test-node 'recipe[iptables]'

When running knife from Windows PowerShell, a string should be surrounded by triple single quotes (''' '''). For example:

$ knife node run_list set test-node '''recipe[iptables]'''

Note

The chef-client version 12.4 release adds an optional feature to the Microsoft Installer Package (MSI) for Chef. This feature enables the ability to pass quoted strings from the Windows PowerShell command line without the need for triple single quotes (''' '''). This feature installs a Windows PowerShell module (typically in C:\opscode\chef\modules) that is also appended to the PSModulePath environment variable. This feature is not enabled by default. To activate this feature, run the following command from within Windows PowerShell:

$ Import-Module chef

or add Import-Module chef to the profile for Windows PowerShell located at:

~\Documents\WindowsPowerShell\Microsoft.PowerShell_profile.ps1

This module exports cmdlets that have the same name as the command-line tools—chef-client, knife, chef-apply—that are built into Chef.

For example:

$ knife exec -E 'puts ARGV' """&s0meth1ng"""

is now:

$ knife exec -E 'puts ARGV' '&s0meth1ng'

and:

$ knife node run_list set test-node '''role[ssssssomething]'''

is now:

$ knife node run_list set test-node 'role[ssssssomething]'

To remove this feature, run the following command from within Windows PowerShell:

$ Remove-Module chef

Options

This argument has the following options:

-a ITEM, --after ITEM
Add a run list item after the specified run list item.
-b ITEM, --before ITEM
Add a run list item before the specified run list item.

Note

See knife.rb for more information about how to add certain knife options as settings in the knife.rb file.

Examples

The following examples show how to use this knife subcommand:

Add a role

To add a role to a run-list, enter:

$ knife node run_list add node 'role[ROLE_NAME]'

Add roles and recipes

To add roles and recipes to a run-list, enter:

$ knife node run_list add node 'recipe[COOKBOOK::RECIPE_NAME],recipe[COOKBOOK::RECIPE_NAME],role[ROLE_NAME]'

Add a recipe with a FQDN

To add a recipe to a run-list using the fully qualified format, enter:

$ knife node run_list add node 'recipe[COOKBOOK::RECIPE_NAME]'

Add a recipe with a cookbook

To add a recipe to a run-list using the cookbook format, enter:

$ knife node run_list add node 'COOKBOOK::RECIPE_NAME'

Add the default recipe

To add the default recipe of a cookbook to a run-list, enter:

$ knife node run_list add node 'COOKBOOK'

run_list remove

Use the run_list remove argument to remove run-list items (roles or recipes) from a node. A recipe must be in one of the following formats: fully qualified, cookbook, or default. Both roles and recipes must be in quotes, for example: 'role[ROLE_NAME]' or 'recipe[COOKBOOK::RECIPE_NAME]'. Use a comma to separate roles and recipes when removing more than one, like this: 'recipe[COOKBOOK::RECIPE_NAME],COOKBOOK::RECIPE_NAME,role[ROLE_NAME]'.

Syntax

This argument has the following syntax:

$ knife node run_list remove NODE_NAME RUN_LIST_ITEM

Options

This command does not have any specific options.

Note

See knife.rb for more information about how to add certain knife options as settings in the knife.rb file.

Examples

The following examples show how to use this knife subcommand:

Remove a role

To remove a role from a run-list, enter:

$ knife node run_list remove node 'role[ROLE_NAME]'

Remove a run-list

To remove a recipe from a run-list using the fully qualified format, enter:

$ knife node run_list remove node 'recipe[COOKBOOK::RECIPE_NAME]'

run_list set

Use the run_list set argument to set the run-list for a node. A recipe must be in one of the following formats: fully qualified, cookbook, or default. Both roles and recipes must be in quotes, for example: 'role[ROLE_NAME]' or 'recipe[COOKBOOK::RECIPE_NAME]'. Use a comma to separate roles and recipes when removing more than one, like this: 'recipe[COOKBOOK::RECIPE_NAME],COOKBOOK::RECIPE_NAME,role[ROLE_NAME]'.

Syntax

This argument has the following syntax:

$ knife node run_list set NODE_NAME RUN_LIST_ITEM

Warning

When running knife in Microsoft Windows, a string may be interpreted as a wildcard pattern when quotes are not present in the command. The number of quotes to use depends on the shell from which the command is being run.

When running knife from the command prompt, a string should be surrounded by single quotes (' '). For example:

$ knife node run_list set test-node 'recipe[iptables]'

When running knife from Windows PowerShell, a string should be surrounded by triple single quotes (''' '''). For example:

$ knife node run_list set test-node '''recipe[iptables]'''

Note

The chef-client version 12.4 release adds an optional feature to the Microsoft Installer Package (MSI) for Chef. This feature enables the ability to pass quoted strings from the Windows PowerShell command line without the need for triple single quotes (''' '''). This feature installs a Windows PowerShell module (typically in C:\opscode\chef\modules) that is also appended to the PSModulePath environment variable. This feature is not enabled by default. To activate this feature, run the following command from within Windows PowerShell:

$ Import-Module chef

or add Import-Module chef to the profile for Windows PowerShell located at:

~\Documents\WindowsPowerShell\Microsoft.PowerShell_profile.ps1

This module exports cmdlets that have the same name as the command-line tools—chef-client, knife, chef-apply—that are built into Chef.

For example:

$ knife exec -E 'puts ARGV' """&s0meth1ng"""

is now:

$ knife exec -E 'puts ARGV' '&s0meth1ng'

and:

$ knife node run_list set test-node '''role[ssssssomething]'''

is now:

$ knife node run_list set test-node 'role[ssssssomething]'

To remove this feature, run the following command from within Windows PowerShell:

$ Remove-Module chef

Options

This command does not have any specific options.

Examples

None.

show

Use the show argument to display information about a node.

Syntax

This argument has the following syntax:

$ knife node show NODE_NAME (options)

Options

This argument has the following options:

-a ATTR, --attribute ATTR
The attribute (or attributes) to show.
-l, --long
Display all attributes in the output and show the output as JSON.
-m, --medium
Display normal attributes in the output and to show the output as JSON.
-r, --run-list
Show only the run-list.

Examples

The following examples show how to use this knife subcommand:

Show all data about nodes

To view all data for a node named build, enter:

$ knife node show build

to return:

Node Name:   build
Environment: _default
FQDN:
IP:
Run List:
Roles:
Recipes:
Platform:

Show basic information about nodes

To show basic information about a node, truncated and nicely formatted:

knife node show <node_name>

Show all data about nodes, truncated

To show all information about a node, nicely formatted:

knife node show -l <node_name>

Show attributes

To list a single node attribute:

knife node show <node_name> -a <attribute_name>

where <attribute_name> is something like kernel or platform. (This doesn’t work for nested attributes like node[kernel][machine] because knife node show doesn’t understand nested attributes.)

Show the FQDN

To view the FQDN for a node named i-12345678, enter:

$ knife node show i-12345678 -a fqdn

to return:

fqdn: ip-10-251-75-20.ec2.internal

Show a run-list

To view the run list for a node named dev, enter:

$ knife node show dev -r

Show as JSON data

To view information in JSON format, use the -F common option as part of the command like this:

$ knife node show devops -F json

Other formats available include text, yaml, and pp.

Show as raw JSON data

To view node information in raw JSON, use the -l or --long option:

knife node show -l -F json <node_name>

and/or:

knife node show -l --format=json <node_name>