macosx_service Resource

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Use the macosx_service resource to manage services on the macOS platform.

Syntax

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

macosx_service 'name' do
  init_command         String
  options              Array, String
  parameters           Hash
  pattern              String
  plist                String
  priority             Integer, String, Hash
  reload_command       String, false
  restart_command      String, false
  run_levels           Array
  service_name         String # default value: 'name' unless specified
  session_type         String
  start_command        String, false
  status_command       String, false
  stop_command         String, false
  supports             Hash # default value: {"restart"=>nil, "reload"=>nil, "status"=>nil}
  timeout              Integer # default value: 900
  user                 String
  action               Symbol # defaults to :nothing if not specified
end

where:

• macosx_service 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.
• init_command, options, parameters, pattern, plist, priority, reload_command, restart_command, run_levels, service_name, session_type, start_command, status_command, stop_command, supports, timeout, and user are the properties available to this resource.

Actions

The macosx_service resource has the following actions:

:disable

Disable a service.

:enable

Enable a service at boot.

:nothing

This resource block doesn’t 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.

:reload

Reload the configuration for this service.

:restart

Stop and then start a service again.

:start

Start a service, and keep it running until stopped or disabled.

:stop

Stop a service. It will stay stopped until restarted.

Properties

The macosx_service resource has the following properties:

init_command

Ruby Type: String

The path to the init script that is associated with the service. Use init_command to prevent the need to specify overrides for the start_command, stop_command, and restart_command properties. When this property is not specified, the Chef Infra Client will use the default init command for the service provider being used.

options

Ruby Type: Array, String

Solaris platform only. Options to pass to the service command. See the svcadm manual for details of possible options.

parameters

Ruby Type: Hash

Upstart only. A hash of parameters to pass to the service command for use in the service definition.

pattern

Ruby Type: String | Default Value: The value provided to `service_name` or the resource block's name

The pattern to look for in the process table.

plist

Ruby Type: String

A plist to use in the case where the filename and label for the service do not match.

priority

Ruby Type: Integer, String, Hash

Debian platform only. The relative priority of the program for start and shutdown ordering. May be an integer or a Hash. An integer is used to define the start run levels; stop run levels are then 100-integer. A Hash is used to define values for specific run levels. For example, { 2 => [:start, 20], 3 => [:stop, 55] } will set a priority of twenty for run level two and a priority of fifty-five for run level three.

reload_command

Ruby Type: String, false

The command used to tell a service to reload its configuration.

restart_command

Ruby Type: String, false

The command used to restart a service.

run_levels

Ruby Type: Array

RHEL platforms only. Specific run levels the service will run under.

service_name

Ruby Type: String | Default Value: The resource block's name

An optional property to set the service name if it differs from the resource block’s name.

session_type

Ruby Type: String

The type of plist to be created

start_command

Ruby Type: String, false

The command used to start a service.

status_command

Ruby Type: String, false

The command used to check the run status for a service.

stop_command

Ruby Type: String, false

The command used to stop a service.

supports

Ruby Type: Hash | Default Value: {"restart"=>nil, "reload"=>nil, "status"=>nil}

A list of properties that controls how Chef Infra Client is to attempt to manage a service: :restart, :reload, :status. For :restart, the init script or other service provider can use a restart command; if :restart is not specified, the chef-client attempts to stop and then start a service. For :reload, the init script or other service provider can use a reload command. For :status, the init script or other service provider can use a status command to determine if the service is running; if :status is not specified, the chef-client attempts to match the service_name against the process table as a regular expression, unless a pattern is specified as a parameter property. Default value: { restart: false, reload: false, status: false } for all platforms (except for the Red Hat platform family, which defaults to { restart: false, reload: false, status: true }.)

timeout

Ruby Type: Integer | Default Value: 900

The amount of time (in seconds) to wait before timing out.

user

Ruby Type: String

systemd only: A username to run the service under.

New in Chef Client 12.21

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 won’t 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 delay in seconds between retry attempts.

sensitive

Ruby Type: true, false | Default Value: false

Ensure that sensitive resource data isn’t logged by Chef Infra Client.

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 doesn’t exist, an error is raised. In contrast, subscribes won’t fail if the source resource isn’t 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, for each 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 doesn’t 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 doesn’t 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 doesn’t exist, the subscription won’t raise an error. Contrast this with the stricter semantics of notifies, which will raise an error if the other resource doesn’t 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, for each 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 isn’t 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 isn’t 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’s being executed, and then if the desired state is present, for Chef Infra Client to don’thing.

The following properties can be used to define a guard that’s 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

This resource does not have any examples.