The Debug Framework contributes Java debug configuration to the application at runtime. Note: This framework is only useful in Diego-based containers with SSH access enabled.
| Detection Criterion | enabled set in the config/debug.yml file |
| Tags | debug=<port> |
For general information on configuring the buildpack, including how to specify configuration values through environment variables, refer to Configuration and Extension.
The framework can be configured by creating or modifying the config/debug.yml file in the buildpack fork.
| enabled | Whether to enable Java debugging |
| port | The port that the debug agent will listen on. Defaults to 8000. |
| suspend | Whether to suspend execution until a debugger has attached. Note, you cannot ssh to a container until the container has decided the application is running. Therefore when enabling this setting you must also push the application using the parameter -u process which disables container health checking. |
After starting an application with debugging enabled, an SSH tunnel must be created to the container. To create that SSH container, execute the following command:
The REMOTE_PORT should match the port configuration for the application (8000 by default). The LOCAL_PORT can be any open port on your computer, but typically matches the REMOTE_PORT where possible.
Once the SSH tunnel has been created, your IDE should connect to localhost:<LOCAL_PORT> for debugging.