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Upsun is the official Symfony PaaS. This guide provides instructions for deploying, and working with, Symfony on Upsun.
The Symfony CLI wraps the Upsun CLI with added features related to Symfony. So when using Symfony, you can replace upsun <command> by symfony upsun:<command> in all of your commands.

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1. Create your Symfony app

To get familiar with Upsun, create a new Symfony project from scratch. The present tutorial uses the Symfony Demo app as an example :
Terminal
The --demo flag pulls the Symfony Demo skeleton.
The --upsun flag automatically generates the Upsun configuration file.
Alternatively, you can deploy an existing Symfony project. To do so, follow these steps:
  1. To generate a sensible default Upsun configuration, run the following command from within the project’s directory:
    Terminal
    This generates the .upsun/config.yaml and php.ini configuration files.
  2. Add and commit your changes:
    Terminal

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2. Create your Upsun project

To create a project on Upsun, run the following command from within the project’s directory:
Terminal
The --set-remote flag sets the new project as the remote for this repository.

Tip

You can link any repository to an existing Upsun project using the following command:
Terminal

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3. Deploy your project

To deploy your project, run the following command:
Terminal
During deployment, the logs from the Upsun API are displayed in your terminal so you can monitor progress. To stop the display of the logs without interrupting the deployment, use CTRL+C in your terminal. To go back to displaying the logs, run symfony upsun:activity:log. Congratulations, your first Symfony app has been deployed on Upsun!

Tip

Now that your app is deployed in production mode, you can define a custom domain for your live website. To do so, see how to set up a custom domain on Upsun, or run the following command:
Terminal

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4. Make changes to your project

Now that your project is deployed, you can start making changes to it. For example, you might want to fix a bug or add a new feature. In your project, the main branch always represents the production environment. Other branches are for developing new features, fixing bugs, or updating the infrastructure. To make changes to your project, follow these steps:
  1. Create a new environment (a Git branch) to make changes without impacting production:
    Terminal
    This command creates a new local feat-a Git branch based on the main Git branch, and activates a related environment on Upsun. The new environment inherits the data (service data and assets) of its parent environment (the production environment here).
  2. Make changes to your project. For example, if you created a Symfony Demo app, edit the templates/default/homepage.html.twig template and make the following visual changes:
  3. Add and commit your changes:
    Terminal
  4. Deploy your changes to the feat-a environment:
    Terminal
    Note that each environment has its own domain name. To view the domain name of your new environment, run the following command:
    Terminal
  5. Iterate by changing the code, committing, and deploying. When satisfied with your changes, merge them to the main branch, deploy, and remove the feature branch:
    Terminal
    Note that deploying to production is fast because the image built for the feat-a environment is reused. For a long running branch, keep the code up-to-date with the main branch by using git merge main or git rebase main. Also, keep the data in sync with the production environment by using symfony upsun:env:sync.

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5. Optional: Use a third-party Git provider

When you choose to use a third-party Git hosting service, the Upsun Git repository becomes a read-only mirror of the third-party repository. All your changes take place in the third-party repository. Add an integration to your existing third-party repository:
Last modified on May 27, 2026