chef_client_scheduled_task Resource

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To suggest a change, edit the chef_client_scheduled_task.rb file and submit a pull request to the Chef Infra Client repository.

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Use the chef_client_scheduled_task resource to setup the Chef Infra Client to run as a Windows scheduled task. This resource will also create the specified log directory if it doesn’t already exist.

New in Chef Infra Client 16.0.

Syntax

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

chef_client_scheduled_task 'name' do
  accept_chef_license      true, false # default value: false
  chef_binary_path         String # default value: "C:/opscode/chef/bin/chef-client"
  config_directory         String # default value: "/etc/chef"
  daemon_options           Array
  frequency                String # default value: "minute"
  frequency_modifier       Integer, String # default value: "30 if frequency is 'minute', 1 otherwise"
  log_directory            String # default value: "CONFIG_DIRECTORY/log"
  log_file_name            String # default value: "client.log"
  password                 String
  run_on_battery           true, false # default value: true
  splay                    Integer, String # default value: 300
  start_date               String
  start_time               String
  task_name                String # default value: "chef-client"
  user                     String # default value: "System"
  action                   Symbol # defaults to :add if not specified
end

where:

chef_client_scheduled_task is the resource.
name is the name given to the resource block.
action identifies which steps Chef Infra Client will take to bring the node into the desired state.
accept_chef_license, chef_binary_path, config_directory, daemon_options, frequency, frequency_modifier, log_directory, log_file_name, password, run_on_battery, splay, start_date, start_time, task_name, and user are the properties available to this resource.

Actions

The chef_client_scheduled_task resource has the following actions:

:add: Add a Windows Scheduled Task that runs Chef Infra Client.
:nothing: This resource block does not act unless notified by another resource to take action. Once notified, this resource block either runs immediately or is queued up to run at the end of a Chef Infra Client run.
:remove: Remove a Windows Scheduled Task that runs Chef Infra Client.

Properties

The chef_client_scheduled_task resource has the following properties:

accept_chef_license

Ruby Type: true, false | Default Value: false

Accept the Chef Online Master License and Services Agreement. See https://www.chef.io/online-master-agreement/

chef_binary_path

Ruby Type: String | Default Value: C:/opscode/chef/bin/chef-client

The path to the chef-client binary.

config_directory

Ruby Type: String | Default Value: /etc/chef

The path of the config directory.

daemon_options

Ruby Type: Array | Default Value: lazy default

An array of options to pass to the chef-client command.

frequency

Ruby Type: String | Default Value: minute
Allowed Values: "daily", "hourly", "minute", "monthly", "on_idle", "on_logon", "once", "onstart"

Frequency with which to run the task.

frequency_modifier

Ruby Type: Integer, String | Default Value: 30 if frequency is 'minute', 1 otherwise

Numeric value to go with the scheduled task frequency

log_directory

Ruby Type: String | Default Value: CONFIG_DIRECTORY/log

The path of the directory to create the log file in.

log_file_name

Ruby Type: String | Default Value: client.log

The name of the log file to use.

password

Ruby Type: String

The password for the user that Chef Infra Client runs as.

run_on_battery

Ruby Type: true, false | Default Value: true

Run the Chef Infra Client task when the system is on batteries.

splay

Ruby Type: Integer, String | Default Value: 300

A random number of seconds between 0 and X to add to interval so that all chef-client commands don’t execute at the same time.

start_date

Ruby Type: String

The start date for the task in m:d:Y format (ex: 12/17/2020).

start_time

Ruby Type: String

The start time for the task in HH:mm format (ex: 14:00). If the frequency is minute default start time will be Time.now plus the frequency_modifier number of minutes.

task_name

Ruby Type: String | Default Value: chef-client

The name of the scheduled task to create.

user

Ruby Type: String | Default Value: System

The name of the user that Chef Infra Client runs as.

Common Resource Functionality

Chef resources include common properties, notifications, and resource guards.

Common Properties

The following properties are common to every resource:

compile_time

Ruby Type: true, false | Default Value: false

Control the phase during which the resource is run on the node. Set to true to run while the resource collection is being built (the compile phase). Set to false to run while Chef Infra Client is configuring the node (the converge phase).

ignore_failure

Ruby Type: true, false, :quiet | Default Value: false

Continue running a recipe if a resource fails for any reason. :quiet will not display the full stack trace and the recipe will continue to run if a resource fails.

retries

Ruby Type: Integer | Default Value: 0

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

retry_delay

Ruby Type: Integer | Default Value: 2

The retry delay (in seconds).

sensitive

Ruby Type: true, false | Default Value: false

Ensure that sensitive resource data is not logged by Chef InfraClient.

Notifications

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.

If the referenced resource does not exist, an error is raised. In contrast, subscribes will not fail if the source resource is not found.

A timer specifies the point during a Chef Infra 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 a Chef Infra 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

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.

If the other resource does not exist, the subscription will not raise an error. Contrast this with the stricter semantics of notifies, which will raise an error if the other resource does not exist.

A timer specifies the point during a Chef Infra 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 a Chef Infra 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

Guards

A guard property can be used to evaluate the state of a node during the execution phase of a Chef Infra Client run. Based on the results of this evaluation, a guard property is then used to tell Chef Infra Client if it should continue executing a resource. A guard property accepts either a string value or a Ruby block value:

A string is executed as a shell command. If the command returns 0, the guard is applied. If the command returns any other value, then the guard property is not applied. String guards in a powershell_script run Windows PowerShell commands and may return true in addition to 0.
A block is executed as Ruby code that must return either true or false. If the block returns true, the guard property is applied. If the block returns false, the guard property is not applied.

A guard property is useful for ensuring that a resource is idempotent by allowing that resource to test for the desired state as it is being executed, and then if the desired state is present, for Chef Infra Client to do nothing.

Properties

The following properties can be used to define a guard that is evaluated during the execution phase of a Chef Infra Client run:

not_if: Prevent a resource from executing when the condition returns true.
only_if: Allow a resource to execute only if the condition returns true.

Examples

The following examples demonstrate various approaches for using the chef_client_scheduled_task resource in recipes:

Setup Chef Infra Client to run using the default 30 minute cadence:

chef_client_scheduled_task 'Run Chef Infra Client as a scheduled task'

Run Chef Infra Client on system start:

chef_client_scheduled_task 'Chef Infra Client on start' do
  frequency 'onstart'
end

Run Chef Infra Client with extra options passed to the client:

chef_client_scheduled_task 'Run an override recipe' do
  daemon_options ['--override-runlist mycorp_base::default']
end

Run Chef Infra Client daily at 01:00 am, specifying a named run-list:

chef_client_scheduled_task 'Run chef-client named run-list daily' do
  frequency 'daily'
  start_time '01:00'
  daemon_options ['-n audit_only']
end

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