Deploying a Flask Project with DeployHQ

This guide assumes you already have a hosted server in place with Flask installed. You can find many tutorials online to get Flask set up.

Using DeployHQ for Deployments

DeployHQ is a service that simplifies deploying applications to your servers. You can define configurations, custom commands, and automate deployments on pushing code.

The free plan lets you deploy 1 project up to 10 times a day!

Creating a Project

After signing up and logging in, create a project by going to Projects > New Project.

Follow the wizard and choose your repository. If you encounter issues connecting, refer to DeployHQ's support page.

Dedicated User for DeployHQ

For security, it's recommended to create a separate user for deployments:

sudo adduser deployhq
sudo usermod -a -G www-data deployhq

Configuring a Server

Now, tell DeployHQ where your application resides. Go to Servers > New Server.

Choose a memorable name and select SSH as the protocol.
Enter your server's IP address in the Hostname field.
The Username should be deployhq.
Check the Use SSH key rather than password for authentication? box. Then, run these commands on your server:

su - deployhq
mkdir ~/.ssh
chmod 700 ~/.ssh
nano ~/.ssh/authorized_keys

Paste DeployHQ's public key, press Ctrl + X, y, then Enter to save.
Finally, set correct permissions with:

chmod 600 ~/.ssh/authorized_keys

Set the Deployment Path to where your Flask app resides (e.g., /var/www/example.com). Enable Perform zero-downtime deployments on this server.

Zero-downtime deployments ensure your previous version stays live until the new one is ready. You can learn more about this process in DeployHQ's documentation.

By enabling this, your application files will reside in a path like /var/www/example.com/current. Update your web server configuration accordingly.

Enter production in the Environment field and enable automatic deploy.

Once done, press Save.

Note: If you have connection issues, refer to DeployHQ's support page.

Config Files (Optional)

DeployHQ allows uploading files during deployment that you don't want in your repository (like .env files containing sensitive data).

Go to Config Files and click New Config File.

In your project, open the .env.example file and copy its contents into the config file content field.

Setting Up SSH Commands

We'll configure commands to execute on the server after deployment.

Go to SSH Commands and click New SSH Command.

Create the following commands:

Install Dependencies:

cd %path% && pip install -r requirements.txt

(Optional) Run Migrations:

If you use Flask-Migrate, add this command:

cd %path% && flask migrate

Commands run sequentially, so ensure they're in the correct order.

Deploying Your Project

That's it! Time to deploy.

Click Deploy Project in the header. The created server and revisions should be preselected. Once everything looks good, click Deploy to begin deployment.

Now you've automated your Flask project deployments!

If you’ve got any other projects you’d like to automate deployments for, we’ve written lots of guides for deploying the most popular application frameworks and content management systems.