# FastAPI Project - Deployment

You can deploy the project using Docker Compose to a remote server.

The deployment Docker Compose configuration includes Traefik to handle HTTPS and route incoming traffic to the application.

The included GitHub Actions workflow can deploy the application automatically.

But you have to configure a couple things first. 🤓

## Preparation

* Have a remote server ready and available.
* Configure DNS records pointing to the server for the application domain and any supporting service subdomains you want to expose, e.g. `fastapi-project.example.com` and `adminer.fastapi-project.example.com`.
* Install and configure [Docker](https://docs.docker.com/engine/install/) on the remote server (Docker Engine, not Docker Desktop).

## Deploy the FastAPI Project

You can deploy your FastAPI project with Docker Compose.

**Note**: You might want to jump ahead to the section about Continuous Deployment with GitHub Actions.

## Copy the Code

```bash
rsync -av --exclude=".git/" --filter=":- .gitignore" ./ root@your-server.example.com:/root/code/app/
```

Note: `--filter=":- .gitignore"` tells `rsync` to use the same rules as git, ignore files ignored by git, like the Python virtual environment.

## Environment Variables

You need to set some environment variables first.

### Generate secret keys

Some environment variables in the `.env` file have a default value of `changethis`.

You have to change them with a secret key, to generate secret keys you can run the following command:

```bash
python -c "import secrets; print(secrets.token_urlsafe(32))"
```

Copy the content and use that as password / secret key. And run that again to generate another secure key.

### Required Environment Variables

Set the `DOMAIN` to your own domain, for example:

```bash
export DOMAIN=fastapi-project.example.com
```

The deployment Docker Compose configuration also uses `DOMAIN` to set the public frontend URL used in links generated by the backend.

Set the `POSTGRES_PASSWORD` to a secure value:

```bash
export POSTGRES_PASSWORD="$(python -c 'import secrets; print(secrets.token_urlsafe(32))')"
```

Set the `SECRET_KEY`, used to sign tokens, to a secure value:

```bash
export SECRET_KEY="$(python -c 'import secrets; print(secrets.token_urlsafe(32))')"
```

Set the `FIRST_SUPERUSER_PASSWORD` to a secure value:

```bash
export FIRST_SUPERUSER_PASSWORD="$(python -c 'import secrets; print(secrets.token_urlsafe(32))')"
```

You can set several other environment variables:

* `PROJECT_NAME`: The name of the project, used in the API for the docs and emails.
* `FIRST_SUPERUSER`: The email of the first superuser, this superuser will be the one that can create new users.
* `SMTP_HOST`: The SMTP server host to send emails, this would come from your email provider (E.g. Mailgun, Sparkpost, Sendgrid, etc).
* `SMTP_USER`: The SMTP server user to send emails.
* `SMTP_PASSWORD`: The SMTP server password to send emails.
* `EMAILS_FROM_EMAIL`: The email account to send emails from.
* `SENTRY_DSN`: The DSN for Sentry, if you are using it.

## GitHub Repository Automation

Install the following GitHub Apps to enable the included repository automation:

* [Latest Changes](https://github.com/apps/latest-changes) updates `release-notes.md` when a pull request is merged.
* [PR Push](https://github.com/apps/pr-push) lets the pre-commit workflow push automated fixes to pull request branches.
* [PR Submit](https://github.com/apps/pr-submit) lets the **Bump pre-commit hooks** and **Prepare Release** workflows create pull requests.

To publish code coverage with [Smokeshow](https://github.com/samuelcolvin/smokeshow), add `SMOKESHOW_AUTH_KEY` as a repository secret.

### Deploy with Docker Compose

With the environment variables in place, you can deploy with Docker Compose:

```bash
cd /root/code/app/
docker compose -f compose.yml -f compose.deploy.yml build
docker compose -f compose.yml -f compose.deploy.yml run --rm backend bash scripts/prestart.sh
docker compose -f compose.yml -f compose.deploy.yml up -d
```

The `compose.deploy.yml` file adds the deployment settings to the shared configuration in `compose.yml`, including HTTPS and automatic certificate handling. Explicitly listing these files also excludes the local development settings in `compose.override.yml`.

## Continuous Deployment (CD)

You can use GitHub Actions to deploy your project automatically. 😎

The included `deploy.yml` workflow deploys the application whenever changes are pushed to `master`, including when a pull request is merged. 🚀

### Install GitHub Actions Runner

* On your remote server, create a user for your GitHub Actions:

```bash
sudo adduser github
```

* Add Docker permissions to the `github` user:

```bash
sudo usermod -aG docker github
```

* Temporarily switch to the `github` user:

```bash
sudo su - github
```

* Go to the `github` user's home directory:

```bash
cd
```

* [Install a GitHub Action self-hosted runner following the official guide](https://docs.github.com/en/actions/hosting-your-own-runners/managing-self-hosted-runners/adding-self-hosted-runners#adding-a-self-hosted-runner-to-a-repository).

After installing, the guide would tell you to run a command to start the runner. Nevertheless, it would stop once you terminate that process or if your local connection to your server is lost.

To make sure it runs on startup and continues running, you can install it as a service. To do that, exit the `github` user and go back to the `root` user:

```bash
exit
```

After you do it, you will be on the previous user again. And you will be on the previous directory, belonging to that user.

Before being able to go the `github` user directory, you need to become the `root` user (you might already be):

```bash
sudo su
```

* As the `root` user, go to the `actions-runner` directory inside of the `github` user's home directory:

```bash
cd /home/github/actions-runner
```

* Install the self-hosted runner as a service with the user `github`:

```bash
./svc.sh install github
```

* Start the service:

```bash
./svc.sh start
```

* Check the status of the service:

```bash
./svc.sh status
```

You can read more about it in the official guide: [Configuring the self-hosted runner application as a service](https://docs.github.com/en/actions/hosting-your-own-runners/managing-self-hosted-runners/configuring-the-self-hosted-runner-application-as-a-service).

### Set Repository Secrets

In your repository, go to **Settings** > **Secrets and variables** > **Actions** and add the following [repository secrets](https://docs.github.com/en/actions/how-tos/write-workflows/choose-what-workflows-do/use-secrets#creating-secrets-for-a-repository):

* `DOMAIN`
* `FIRST_SUPERUSER`
* `FIRST_SUPERUSER_PASSWORD`
* `POSTGRES_PASSWORD`
* `SECRET_KEY`

To enable emails, configure these additional secrets with the values from your email provider:

* `SMTP_HOST`
* `SMTP_USER`
* `SMTP_PASSWORD`
* `EMAILS_FROM_EMAIL`

To enable Sentry, configure the `SENTRY_DSN` secret.

## URLs

Replace `fastapi-project.example.com` with your domain.

Application (frontend and API): `https://fastapi-project.example.com`

Interactive API docs: `https://fastapi-project.example.com/docs`

Adminer: `https://adminer.fastapi-project.example.com`