umap/docs/deploy/asgi.md

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# ASGI
While uMap has been historically deployed using the WSGI specification,
there is now an **experimental** ASGI endpoint. This will be the way to
deploy uMap to use the live collaborative editing feature, which needs
websockets.
## Nginx
When using ASGI, the [nginx](nginx.md), the `/` entrypoint should be:
```
location / {
proxy_set_header Host $http_host;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection $connection_upgrade;
proxy_redirect off;
proxy_buffering off;
proxy_pass http://umap/;
}
```
## Uvicorn
Uvicorn must be installed in the umap virtualenv:
/path/to/umap/venv/bin/pip install uvicorn
And could then be run like this:
/path/to/umap/venv/bin/uvicorn \
--proxy-headers \
--uds /srv/umap/umap.sock \
--no-access-log \
umap.asgi:application
## Systemd
Here is an example service to manage uvicorn with systemd:
```
[Unit]
Description=umap
After=network.target
Requires=postgresql.service
[Service]
Type=simple
User=umap
WorkingDirectory=/srv/umap/
PrivateTmp=true
EnvironmentFile=/srv/umap/env
ExecStart=/srv/umap/venv/bin/uvicorn \
--proxy-headers \
--uds /srv/umap/uvicorn.sock \
--no-access-log \
umap.asgi:application
ExecReload=/bin/kill -HUP ${MAINPID}
RestartSec=1
Restart=always
[Install]
WantedBy=multi-user.target
```
Then to install it and enable it, copy it to `/etc/systemd/system/umap.service`
and run:
sudo systemctl enable umap.service
## Env
Uvicorn can be [configured](https://www.uvicorn.org/deployment/) from env vars,
for example to define the number of workers:
```env title="/srv/umap/env"
UVICORN_WORKERS=4
```