openssl_x509_crl resource

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Use the openssl_x509_crl resource to generate PEM-formatted x509 certificate revocation list (CRL) files.

New in Chef Client 14.4.

Syntax

The openssl_x509_crl resource has the following syntax:

openssl_x509_crl 'name' do
  ca_cert_file           String
  ca_key_file            String
  ca_key_pass            String
  expire                 Integer # default value: 8
  group                  String
  mode                   Integer, String
  owner                  String
  path                   String # default value: 'name' unless specified
  renewal_threshold      Integer # default value: 1
  revocation_reason      Integer # default value: 0
  serial_to_revoke       Integer, String
  action                 Symbol # defaults to :create if not specified
end

where:

  • openssl_x509_crl is the resource.
  • name is the name given to the resource block.
  • action identifies which steps the chef-client will take to bring the node into the desired state.
  • ca_cert_file, ca_key_file, ca_key_pass, expire, group, mode, owner, path, renewal_threshold, revocation_reason, and serial_to_revoke are the properties available to this resource.

Actions

The openssl_x509_crl resource has the following actions:

:create
Default. Create the certificate revocation list file.
: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 the Chef Client run.

Properties

ca_cert_file

Ruby Type: String | REQUIRED

The path to the CA X509 Certificate on the filesystem. If the ca_cert_file property is specified, the ca_key_file property must also be specified, the CRL will be signed with them.

ca_key_file

Ruby Type: String | REQUIRED

The path to the CA private key on the filesystem. If the ca_key_file property is specified, the ca_cert_file property must also be specified, the CRL will be signed with them.

ca_key_pass

Ruby Type: String

The passphrase for CA private key’s passphrase.

expire

Ruby Type: Integer | Default Value: 8

Value representing the number of days from now through which the issued CRL will remain valid. The CRL will expire after this period.

group

Ruby Type: String

The group permission for the CRL file.

mode

Ruby Type: Integer, String

The permission mode of the CRL file.

owner

Ruby Type: String

The owner permission for the CRL file.

path

Ruby Type: String | Default Value: 'name'

An optional property for specifying the path to write the file to if it differs from the resource block’s name.

renewal_threshold

Ruby Type: Integer | Default Value: 1

Number of days before the expiration. It this threshold is reached, the CRL will be renewed.

revocation_reason

Ruby Type: Integer | Default Value: 0

Reason for the revocation.

serial_to_revoke

Ruby Type: Integer, String

Serial of the X509 Certificate to revoke.

Common Resource Functionality

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

Common Properties

The following properties are common to every resource:

ignore_failure

Ruby Type: true, false | Default Value: false

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

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 the chef-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.

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
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

Guards

A guard property can be used to evaluate the state of a node during the execution phase of the chef-client run. Based on the results of this evaluation, a guard property is then used to tell the chef-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 the chef-client to do nothing.

The following properties can be used to define a guard that is evaluated during the execution phase of the chef-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

Create a certificate revocation file

openssl_x509_crl '/etc/ssl_test/my_ca.crl' do
  ca_cert_file '/etc/ssl_test/my_ca.crt'
  ca_key_file '/etc/ssl_test/my_ca.key'
end

Create a certificate revocation file for a particular serial

openssl_x509_crl '/etc/ssl_test/my_ca.crl' do
  ca_cert_file '/etc/ssl_test/my_ca.crt'
  ca_key_file '/etc/ssl_test/my_ca.key'
  serial_to_revoke C7BCB6602A2E4251EF4E2827A228CB52BC0CEA2F
end