forked from hans/Nominatim
149 lines
4.0 KiB
Markdown
149 lines
4.0 KiB
Markdown
# Deploying the Nominatim Python frontend
|
|
|
|
Nominatim can be run as a Python-based
|
|
[ASGI web application](https://asgi.readthedocs.io/en/latest/). You have the
|
|
choice between [Falcon](https://falcon.readthedocs.io/en/stable/)
|
|
and [Starlette](https://www.starlette.io/) as the ASGI framework.
|
|
|
|
This section gives a quick overview on how to configure Nginx to serve
|
|
Nominatim. Please refer to the documentation of
|
|
[Nginx](https://nginx.org/en/docs/) for background information on how
|
|
to configure it.
|
|
|
|
!!! Note
|
|
Throughout this page, we assume your Nominatim project directory is
|
|
located in `/srv/nominatim-project`. If you have put it somewhere else,
|
|
you need to adjust the commands and configuration accordingly.
|
|
|
|
|
|
### Installing the required packages
|
|
|
|
The Nominatim frontend is best run from its own virtual environment. If
|
|
you have already created one for the database backend during the
|
|
[installation](Installation.md#building-nominatim), you can use that. Otherwise
|
|
create one now with:
|
|
|
|
```sh
|
|
sudo apt-get install virtualenv
|
|
virtualenv /srv/nominatim-venv
|
|
```
|
|
|
|
The Nominatim frontend is contained in the 'nominatim-api' package. To
|
|
install directly from the source tree run:
|
|
|
|
```sh
|
|
cd Nominatim
|
|
/srv/nominatim-venv/bin/pip install packaging/nominatim-api
|
|
```
|
|
|
|
The recommended way to deploy a Python ASGI application is to run
|
|
the ASGI runner [uvicorn](https://www.uvicorn.org/)
|
|
together with [gunicorn](https://gunicorn.org/) HTTP server. We use
|
|
Falcon here as the web framework.
|
|
|
|
Add the necessary packages to your virtual environment:
|
|
|
|
``` sh
|
|
/srv/nominatim-venv/bin/pip install falcon uvicorn gunicorn
|
|
```
|
|
|
|
### Setting up Nominatim as a systemd job
|
|
|
|
Next you need to set up the service that runs the Nominatim frontend. This is
|
|
easiest done with a systemd job.
|
|
|
|
First you need to tell systemd to create a socket file to be used by
|
|
hunicorn. Create the following file `/etc/systemd/system/nominatim.socket`:
|
|
|
|
``` systemd
|
|
[Unit]
|
|
Description=Gunicorn socket for Nominatim
|
|
|
|
[Socket]
|
|
ListenStream=/run/nominatim.sock
|
|
SocketUser=www-data
|
|
|
|
[Install]
|
|
WantedBy=multi-user.target
|
|
```
|
|
|
|
Now you can add the systemd service for Nominatim itself.
|
|
Create the following file `/etc/systemd/system/nominatim.service`:
|
|
|
|
``` systemd
|
|
[Unit]
|
|
Description=Nominatim running as a gunicorn application
|
|
After=network.target
|
|
Requires=nominatim.socket
|
|
|
|
[Service]
|
|
Type=simple
|
|
User=www-data
|
|
Group=www-data
|
|
WorkingDirectory=/srv/nominatim-project
|
|
ExecStart=/srv/nominatim-venv/bin/gunicorn -b unix:/run/nominatim.sock -w 4 -k uvicorn.workers.UvicornWorker "nominatim_api.server.falcon.server:run_wsgi()"
|
|
ExecReload=/bin/kill -s HUP $MAINPID
|
|
StandardOutput=append:/var/log/gunicorn-nominatim.log
|
|
StandardError=inherit
|
|
PrivateTmp=true
|
|
TimeoutStopSec=5
|
|
KillMode=mixed
|
|
|
|
[Install]
|
|
WantedBy=multi-user.target
|
|
```
|
|
|
|
This sets up gunicorn with 4 workers (`-w 4` in ExecStart). Each worker runs
|
|
its own Python process using
|
|
[`NOMINATIM_API_POOL_SIZE`](../customize/Settings.md#nominatim_api_pool_size)
|
|
connections to the database to serve requests in parallel.
|
|
|
|
Make the new services known to systemd and start it:
|
|
|
|
``` sh
|
|
sudo systemctl daemon-reload
|
|
sudo systemctl enable nominatim.socket
|
|
sudo systemctl start nominatim.socket
|
|
sudo systemctl enable nominatim.service
|
|
sudo systemctl start nominatim.service
|
|
```
|
|
|
|
This sets the service up, so that Nominatim is automatically started
|
|
on reboot.
|
|
|
|
### Configuring nginx
|
|
|
|
To make the service available to the world, you need to proxy it through
|
|
nginx. Add the following definition to the default configuration:
|
|
|
|
``` nginx
|
|
upstream nominatim_service {
|
|
server unix:/run/nominatim.sock fail_timeout=0;
|
|
}
|
|
|
|
server {
|
|
listen 80;
|
|
listen [::]:80;
|
|
|
|
root /var/www/html;
|
|
index /search;
|
|
|
|
location / {
|
|
proxy_set_header Host $http_host;
|
|
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
|
|
proxy_set_header X-Forwarded-Proto $scheme;
|
|
proxy_redirect off;
|
|
proxy_pass http://nominatim_service;
|
|
}
|
|
}
|
|
```
|
|
|
|
Reload nginx with
|
|
|
|
```
|
|
sudo systemctl reload nginx
|
|
```
|
|
|
|
and you should be able to see the status of your server under
|
|
`http://localhost/status`.
|