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AWS OpsWorks
User Guide (API Version 2013-02-18)

Step 11: Update the Cookbook to Manage a Service

Update your cookbook by adding a recipe that manages a service on the instance. This is similar to running the Linux service command or the Windows net stop, net start, and similar commands.This recipe stops the crond service on the instance.

To update the cookbook on the instance and run the new recipe

  1. On your local workstation, in the recipes subdirectory in the opsworks_cookbook_demo directory, create a file named manage_service.rb with the following code. For more information, go to service.

    service "Manage a service" do
      action :stop
      service_name "crond"  
    end
  2. At the terminal or command prompt, use the tar command create a new version of the opsworks_cookbook_demo.tar.gz file, which contains the opsworks_cookbook_demo directory and its updated contents.

  3. Upload the updated opsworks_cookbook_demo.tar.gz file to your S3 bucket.

  4. Follow the procedures in Step 5: Update the Cookbook on the Instance and Run the Recipe to update the cookbook on the instance and to run the recipe. In the "To run the recipe" procedure, for Recipes to execute, type opsworks_cookbook_demo::manage_service.

To test the recipe

  1. Log in to the instance, if you have not done so already.

  2. From the command prompt, run the following command to confirm that the crond service is stopped:

    service crond status

    The following is displayed:

    crond is stopped
  3. To restart the crond service, run the following command:

    sudo service crond start

    The following is displayed:

    Starting crond:  [  OK  ]
  4. To confirm that the crond service has started, run the following command again:

    service crond status

    Information similar to the following is displayed:

    crond (pid  3917) is running...

In the next step, you will update the cookbook to reference information stored as custom JSON on the instance.