Automating with Cloud Hooks¶

Installing Cloud Hooks¶

Your Cloud Hooks are located in your Cloud Platform code repository. Each branch of your repository has a docroot directory with your application’s source code. Cloud Hooks are in the hooks directory next to docroot, not inside of docroot.

You can find the Cloud Hooks directory structure, sample hook scripts, and documentation at https://github.com/acquia/cloud-hooks. To start using Cloud Hooks with your application, copy the current version of the Cloud Hooks repository on GitHub into your Cloud Platform repository.

Using Git, you can copy the Cloud Hooks repository with the following commands:

mkdir -p hooks
curl -s https://github.com/acquia/cloud-hooks/tarball/master -o - -L | tar xfz - -C hooks --strip-components 1
git add hooks
git commit -m 'Import Cloud hooks directory and sample scripts.'
git push

Cloud Hooks must be executable¶

You must set the Unix executable bit for Hook scripts to allow Cloud Platform to run them. Although scripts with the executable bit already set when initially added to your repository will retain the executable bit, you must run the following commands to set the executable bit for files already in your Git repository:

chmod a+x ./my-hook.sh
git add ./my-hook.sh
git commit -m 'Add executable bit to my-hook.sh'
git push

Creating good hook scripts¶

You must thoroughly test all hook scripts before use. A failed hook script can fail hosting tasks for your entire environment. Note the following factor when you create and name your custom hook scripts:

• Hook scripts run in alphabetical order

  Hook scripts run in ASCII alphabetical order (the numbers 0 through 9, followed by a through z) of the file name. Acquia recommends that you prefix your hook scripts with a two-digit number, such as 03, to control the execution order of your hook scripts.

Quick start¶

To demonstrate the power of Cloud Hooks in action, you can run a “Hello, Cloud!” script when deploying new code in your development environment after installing Cloud Hooks. To do this, complete the following steps:

1. Install the hello-world.sh script to run on code deployments to development.

   cd /my/repo
   git checkout master
   cp hooks/samples/hello-world.sh hooks/dev/post-code-deploy
   git add .
   git commit -m 'Run the hello-world script on post-code-deploy to Dev.'
   git push
   

2. Sign in to the Cloud Platform user interface, and then select your application.

3. In the Dev environment code section, click the code switch button and select the master branch. If your Dev environment is already running master, select any other tag, and then select master again.

4. Click Continue.

5. Click Switch to confirm the switch to the master branch.

6. View the task log. After the code deployment task completes, click its Details link to view the hook’s output. The output will appear similar to the following example:

   Started
   Updating s1.dev to deploy master
   Deploying master on s1.dev
   [05:28:33] Starting hook: post-code-deploy
   Executing: /var/www/html/s1.dev/hooks/dev/post-code-deploy/hello-world.sh
   s1 dev master master [email protected]:s1.git git (as [email protected])
   Hello, Cloud!
   [05:28:34] Finished hook: post-code-deploy
   

You can use the code switch button on the Environments page to restore your development environment to an already-deployed branch.

Going further with Cloud Hooks¶

For complete documentation about Cloud Hooks and the latest sample and community-contributed hook scripts, visit https://github.com/acquia/cloud-hooks. By browsing the GitHub repository, you can do the following tasks:

• Find and use the latest sample and community-contributed hook scripts.
• Read the complete documentation on how to write your own custom hook scripts.
• Contribute your own hook scripts so others can use them.

For more information about how some Cloud Platform users have taken advantage of Cloud Hooks, see Using Cloud Hooks on Cloud Platform Hosting.