# Notification service

This section provides instructions for activating the email notification service.

## Launching the service with poetry

From the directory used to install Vulnerability-Lookup:

```bash
poetry run flask --app website.app notify_users
```

## Launching the service with systemd

Create the file `/etc/systemd/system/vulnerability-lookup-notify.service`:

```ini
[Unit]
Description=Vulnerability-Lookup notification service
After=vulnerability-lookup-web.service
Requires=vulnerability-lookup-web.service

[Service]
Type=simple
User=<system user used to install Vulnerability-Lookup>
Group=<group of the user used to install Vulnerability-Lookup>
WorkingDirectory=<path to the cloned repository>
Environment="VULNERABILITYLOOKUP_HOME=<path to the cloned repository>"
ExecStart=<path to poetry> run python -m flask \
    --app website.app notify_users
StandardOutput=append:/var/log/vulnerability-lookup_notify_message.log
StandardError=append:/var/log/vulnerability-lookup_notify_error.log
Restart=on-failure
RestartSec=15s

[Install]
WantedBy=multi-user.target
```

:::{note}
Use Requires only if the web service is managed by systemd on the same host, otherwise just use After to ensure the web service starts before the notification service when both are enabled on the same host.
:::

Then reload and enable the service:

```bash
sudo systemctl daemon-reload
sudo systemctl enable vulnerability-lookup-notify.service
sudo systemctl start vulnerability-lookup-notify.service
systemctl status vulnerability-lookup-notify.service
```

To follow the service logs live:

```bash
sudo journalctl -u vulnerability-lookup-notify.service -f
```

Error logs:

```bash
tail -f logs/vulnerability-lookup_notify_error.log
```

Messages:

```bash
tail -f logs/vulnerability-lookup_notify_message.log
```