route resource¶
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 resourcename
is the name of the resource block. When the name isdefault
, 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 statedevice
,gateway
,netmask
, andtarget
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 Type: 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 anotifies
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 thenginx
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 examplenginx
) 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