Controller send requests for their bundles through a secure HTTP(S) endpoint in operations center. Each controller is aware of the bundle it is connected to through the
casc-bundle-link.yml file that contains the bundle URL and access token.
You can configure a client controller using Configuration as Code (CasC) for Controllers by providing it with the location of the appropriate bundle and access token contained in the
casc-bundle-link.yml file. The client controller fetches its configuration bundle using the details in the
casc-bundle-link.yml file and configures itself accordingly.
The process of setting up a client controller involves the following steps:
The following plugins must be installed to your controller:
Once you have configured bundle availability, you can assign a bundle to the controller.
To assign a bundle to a controller:
Ensure you are signed in to the operations center as a user with the Configure or Administer permission.
From the operations center dashboard, select the down arrow to the right of your controller’s name, and then select Configure.Figure 2. Controller dropdown menu
Scroll down to Configuration as Code (CasC).
Select the appropriate bundle to assign to the controller.
If a Default bundle has already been selected from the Configuration as Code bundles screen, it is pre-selected in the Bundle dropdown.
Once you have assigned the bundle to the client controller, you can download the
|For the Download linkfile option to be accessible from the Manage screen, you must first configure the bundle availability and assign a bundle to the client controller. For more information, refer to Configuring bundle availability for controllers and Assigning a bundle to a controller.|
To download the
Ensure you are logged in to operations center as a user with the Administer permission.
From the operations center dashboard, in the left pane, select Manage Jenkins.
From the operations center dashboard, select the down arrow to the right of your controller’s name, and then select Manage.Figure 3. Controller dropdown menu
Scroll down to Configuration as Code (linkfile).
Select Download linkfile to download the
Save the file anywhere in the controller’s filesystem.
CloudBees recommends saving the
casc-bundle-link.ymlfile in the controller’s
casc-bundle-link.yml file contains the following properties:
The URL where the bundle can be fetched. This URL references both the operations center server and the ID of the bundle.
The access token to authenticate the request with the operations center server.
The URL to access a particular bundle from an operations center server has a well-defined format:
The client controller is directed to use the
casc-bundle-link.yml file by setting a Java system property. On startup, the client controller reads the
casc-bundle-link.yml file, fetches its CasC bundle from the operations center using the details specified in the
casc-bundle-link.yml file, and then initializes itself with the provided configuration.
To point the client controller at the
casc-bundle-link.yml file, set the Java system property
core.casc.config.bundle to the location of the link file. For example, to start a client controller using the
casc-bundle-link.yml file at
$JENKINS_HOME/casc-bundle-link.yml use the following command:
java -Dcore.casc.config.bundle=$JENKINS_HOME/casc-bundle-link.yml -jar jenkins.war
When you start the client controller with the Java system property, the client controller’s connection details are included in the client controller’s
jenkins.yaml file and the client controller is automatically connected to the operations center.
You can regenerate a bundle’s access token using the
casc-bundle-regenerate-token CLI command. Re-generating the access token is not usually required and should only be done in certain situations, such as for security purposes. Any controller currently using the token will lose access to it after it is regenerated. For more information, refer to Configuration as Code (CasC) CLI.
For client controllers, if the token needs to be regenerated, the
casc-bundle-link.yml file needs to be updated with the new token. For more information, see Configuring client controllers with the
Once you have set up your controller and assigned a bundle to it, you can add the CasC bundle column to the operations center dashboard to display the CasC bundle assigned to each controller.
To add the CasC bundle column to the operations center dashboard:
From the operations center dashboard, select Edit View in the left pane.
Scroll down to Columns.
Select Add column.
Select CasC bundle.
The CasC bundle column is now displayed in the operations center dashboard.Figure 4. CasC bundle column