Setting Up Cloud Debugger for PHP

Overview

This page describes how to configure your environment and your PHP application to use Cloud Debugger. For some environments, you must explicitly specify the access scope to let the Cloud Debugger agent send data. We recommend setting the broadest possible access scope and then using Identity and Access Management to restrict access. In keeping with this best practice, set the access scope to be all Cloud APIs with the option cloud-platform.

Language versions and compute environments

Cloud Debugger is available for PHP versions 7.0 and higher on the following compute environments:

App Engine Standard environment	App Engine Flexible environment	Compute Engine	Google Kubernetes Engine	Cloud Run	Cloud Run for Anthos on Google Cloud	VMs and Containers running elsewhere	Cloud Functions

This product or feature is covered by the Pre-GA Offerings Terms of the Google Cloud Platform Terms of Service. Pre-GA products and features may have limited support, and changes to pre-GA products and features may not be compatible with other pre-GA versions. For more information, see the launch stage descriptions.

Setting up Cloud Debugger

To set up Cloud Debugger, complete the following tasks:

1. Verify the Cloud Debugger API is enabled for your project.

2. Install and configure the Debugger on the compute environment you're using.

3. Select your source code.

Verifying the Cloud Debugger API is enabled

To begin using Cloud Debugger, ensure that the Cloud Debugger API is enabled. Cloud Debugger is enabled by default for most projects.
Enable Cloud Debugger API

Note: Cloud Debugger is free to use. However, you need a Google Cloud project with billing enabled before you can use Cloud Debugger.

App Engine flexible environment

1. Install the stackdriver_debugger extension from PECL:

   pecl install stackdriver_debugger-alpha
   

   If your php.ini file does not include extension=stackdriver_debugger.so after running this step, add it manually.

2. Add the Google Cloud PHP Debugger package to your composer.json file:

   composer require google/cloud-debugger
   

3. Add the Cloud Debugger PHP extension via your composer.json file:

   composer require ext-stackdriver_debugger:*
   

4. Set enable_stackdriver_integrations in your app.yaml file:

   runtime_config:
     enable_stackdriver_integration: true
   

5. Enable the agent.

   Add the following code to your app as early in the request as possible:

   use Google\Cloud\Debugger\Agent;
   
   $agent = new Agent(['sourceRoot' => realpath('/app')]);
   

The debugger is now ready for use with your app.

Google Kubernetes Engine

GCLOUD

To enable Debugger using gcloud, complete the following steps:

1. Create your cluster with one of the following access scopes:

   • https://www.googleapis.com/auth/cloud-platform grants your cluster access to all Google Cloud APIs.

   • https://www.googleapis.com/auth/cloud_debugger grants your cluster access to only the Debugger API. Use this access scope to harden your cluster's security.

   gcloud container clusters create example-cluster-name \
          --scopes=https://www.googleapis.com/auth/cloud_debugger
   

   Note: You cannot change the access scopes of a cluster after creation.

2. Install the Cloud Debugger PHP extension in your container. If you have PECL installed, this can be done by adding the following line to your Dockerfile:

   RUN pecl install stackdriver_debugger_alpha
   

3. Add the Debugger package to your application by running the following command in your application:

   composer require google/cloud-debugger
   

4. Add the following line to your Dockerfile to configure a daemon to run the Debugger daemon process:

   RUN php /[YOUR-APP-PATH]/vendor/bin/google-cloud-debugger -s /[YOUR-APP-PATH]
   

5. Add the following lines of code to your app as early in the request as possible to enable the Debugger agent:

   use Google\Cloud\Debugger\Agent;
   
   $agent = new Agent(['sourceRoot' => realpath('/[YOUR-APP-PATH]')]);
   

The debugger is now ready for use when you deploy your containerized app.

CONSOLE

To enable Debugger by using the Google Cloud Console, complete the following steps:

1. On the Node pools section, select Security, and then select Set access for each API.

2. Enable Debugger.

   

3. Optional: Select Allow full access to all Cloud APIs.

Compute Engine

1. Make sure your Compute Engine instances are created with the access scope option Allow full access to all Cloud APIs, or have one of the following access scopes:

   • https://www.googleapis.com/auth/cloud-platform
   • https://www.googleapis.com/auth/cloud_debugger

2. Install the stackdriver_debugger extension (if using containers, install to the image) from PECL:

   pecl install stackdriver_debugger-alpha
   

3. Add the Google Cloud PHP Debugger package to your composer.json file:

   composer require google/cloud-debugger
   

4. Configure a daemon to run the Debugger daemon process:

   php /[YOUR-APP-PATH]/vendor/bin/google-cloud-debugger -s /[YOUR-APP-PATH]
   

5. Enable the agent.

   Add the following code to your app as early in the request as possible:

   use Google\Cloud\Debugger\Agent;
   
   $agent = new Agent(['sourceRoot' => realpath('/[YOUR-APP-PATH]')]);
   

The debugger is now ready for use with your app.

Local and elsewhere

1. Install the stackdriver_debugger extension from PECL:

   pecl install stackdriver_debugger-alpha
   

2. Add the Google Cloud PHP Debugger package to your composer.json file:

   composer require google/cloud-debugger
   

3. Run the Cloud Debugger daemon process:

   php /[YOUR-APP-PATH]/vendor/bin/google-cloud-debugger -s /[YOUR-APP-PATH]
   

4. Enable the agent.

   Add the following code to your app as early in the request as possible:

   use Google\Cloud\Debugger\Agent;
   
   $agent = new Agent(['sourceRoot' => realpath('/[YOUR-APP-PATH]')]);
   

The debugger is now ready for use with your app.

The Debug page in the Cloud Console can display local source files, without upload, for local development. See Selecting source code manually.

Note: You can find the debugger agent's code and documentation on GitHub: Debugger extension and Debugger agent.