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

Step 4: Update the Cookbook to Install a Package

Update your cookbook by adding a recipe that installs on the instance a package that contains the popular text editor GNU Emacs.

Although you can just as easily log in to the instance and install the package once, writing a recipe enables you to run the recipe from AWS OpsWorks Stacks once to install multiple packages on multiple instances in a stack simultaneously.

To update the cookbook to install a package

  1. Back on your local workstation, in the recipes subdirectory in the opsworks_cookbook_demo directory, create a file named install_package.rb with the following code:

    package "Install Emacs" do
      package_name "emacs"
    end  

    This recipe installs the emacs package on the instance. (For more information, go to package.)

    Note

    You can give a recipe any file name you want. Just be sure to specify the correct recipe name whenever you want AWS OpsWorks Stacks to run the recipe.

  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.

This new recipe runs when you update the cookbook on the instance and then run the new recipe from within the updated cookbook. The next step describes how to do this.

After you complete the next step, you will be able to log in to the instance and then type emacs from the command prompt to launch GNU Emacs. (For more information, see Connect to Your Linux Instance.) To exit GNU Emacs, press Ctrl+X, then Ctrl+C.

Important

To be able to log in to the instance, you must first provide AWS OpsWorks Stacks with information about your public SSH key (which you can create with tools such as ssh-keygen or PuTTYgen), and then you must set permissions on the MyCookbooksDemoStack stack to enable your IAM user to log in to the instance. For instructions, see Registering an IAM User's Public SSH Key and Logging In with SSH.