route resource

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Use the route resource to manage the system routing table in a Linux environment.

Syntax

A route resource block manages the system routing table in a Linux environment:

route '10.0.1.10/32' do
  gateway '10.0.0.20'
  device 'eth1'
end

The full syntax for all of the properties that are available to the route resource is:

route 'name' do
  comment                    String
  device                     String
  gateway                    String
  netmask                    String
  notifies                   # see description
  subscribes                 # see description
  target                     String # defaults to 'name' if not specified
  action                     Symbol # defaults to :add if not specified
end

where

  • route is the resource
  • name is the name of the resource block. When the name is default, the default gateway is modified and added to a file under /etc/sysconfig/network` on RHEL and CentOS nodes.
  • action identifies the steps the chef-client will take to bring the node into the desired state
  • device, gateway, netmask, and target are properties of this resource, with the Ruby type shown. See “Properties” section below for more information about all of the properties that may be used with this resource.

Actions

This resource has the following actions:

:add
Default. Add a route.
:delete
Delete a route.
:nothing
Define this resource block to do nothing until notified by another resource to take action. When this resource is notified, this resource block is either run immediately or it is queued up to be run at the end of the Chef Client run.

Properties

This resource has the following properties:

comment

Ruby Type: String

Add a comment.

New in Chef Client 14.0.

device

Ruby Type: String

The network interface to which the route applies.

gateway

Ruby Type: String

The gateway for the route.

ignore_failure

Ruby Types: true, false | Default Value: false

Continue running a recipe if a resource fails for any reason.

netmask

Ruby Type: String

The decimal representation of the network mask. For example: 255.255.255.0.

notifies

Ruby Type: Symbol, ‘Chef::Resource[String]’

A resource may notify another resource to take action when its state changes. Specify a 'resource[name]', the :action that resource should take, and then the :timer for that action. A resource may notify more than one resource; use a notifies statement for each resource to be notified.

A timer specifies the point during the Chef Client run at which a notification is run. The following timers are available:

:before
Specifies that the action on a notified resource should be run before processing the resource block in which the notification is located.
:delayed
Default. Specifies that a notification should be queued up, and then executed at the end of the Chef Client run.
:immediate, :immediately
Specifies that a notification should be run immediately, per resource notified.

The syntax for notifies is:

notifies :action, 'resource[name]', :timer
retries

Ruby Type: Integer | Default Value: 0

The number of times to catch exceptions and retry the resource.

retry_delay

Ruby Type: Integer | Default Value: 2

The retry delay (in seconds).

subscribes

Ruby Type: Symbol, ‘Chef::Resource[String]’

A resource may listen to another resource, and then take action if the state of the resource being listened to changes. Specify a 'resource[name]', the :action to be taken, and then the :timer for that action.

Note that subscribes does not apply the specified action to the resource that it listens to - for example:

file '/etc/nginx/ssl/example.crt' do
   mode '0600'
   owner 'root'
end

service 'nginx' do
   subscribes :reload, 'file[/etc/nginx/ssl/example.crt]', :immediately
end

In this case the subscribes property reloads the nginx service whenever its certificate file, located under /etc/nginx/ssl/example.crt, is updated. subscribes does not make any changes to the certificate file itself, it merely listens for a change to the file, and executes the :reload action for its resource (in this example nginx) when a change is detected.

A timer specifies the point during the Chef Client run at which a notification is run. The following timers are available:

:before
Specifies that the action on a notified resource should be run before processing the resource block in which the notification is located.
:delayed
Default. Specifies that a notification should be queued up, and then executed at the end of the Chef Client run.
:immediate, :immediately
Specifies that a notification should be run immediately, per resource notified.

The syntax for subscribes is:

subscribes :action, 'resource[name]', :timer
target

Ruby Type: String

The IP address of the target route. Default value: the name of the resource block. See “Syntax” section above for more information.

Examples

The following examples demonstrate various approaches for using resources in recipes. If you want to see examples of how Chef uses resources in recipes, take a closer look at the cookbooks that Chef authors and maintains: https://github.com/chef-cookbooks.

Add a host route

route '10.0.1.10/32' do
  gateway '10.0.0.20'
  device 'eth1'
end

Add a default route

route 'default' do
  gateway '10.0.0.20'
end

Delete a network route

route '10.1.1.0/24' do
  gateway '10.0.0.20'
  action :delete
end