OpenStack T version or Train version is a release series of OpenStack, which is an open-source cloud computing platform. Packstack, on the other hand, is a utility that helps users quickly deploy a proof-of-concept OpenStack cloud.

Packstack is primarily used to install and configure OpenStack services on a single node or multiple nodes. It automates the installation process by providing a set of pre-configured answers to the installation questions.

To deploy OpenStack T version using Packstack, you can follow these general steps:

1. Install a supported operating system, such as CentOS or Red Hat Enterprise Linux, on your server.

2. Update the system and ensure it meets the minimum requirements for OpenStack installation.

3. Enable the OpenStack repository and install the Packstack utility.

4. Configure the Packstack answer file according to your requirements. The answer file contains various parameters for each OpenStack service.

5. Run the Packstack command with the configured answer file to start the installation process.

6. Monitor the installation progress and resolve any errors or issues that may arise.

7. Once the installation is complete, you can access the OpenStack dashboard and start using your T version OpenStack cloud.

It’s important to note that Packstack is primarily designed for proof-of-concept deployments and may not be suitable for production environments. For production deployments, it’s recommended to use other deployment tools like OpenStack-Ansible or TripleO.

For detailed instructions and specific configurations, you can refer to the official OpenStack documentation or consult the Packstack documentation available on the OpenStack website.