# Include inside nginx's http context (Ubuntu sites-enabled is in http).
map $http_upgrade $grafana_connection_upgrade {
    default upgrade;
    '' close;
}
upstream grafana_backend {
    server 127.0.0.1:3000;
    keepalive 16;
}
server {
    listen 80;
    listen [::]:80;
    server_name grafana.example.com;
    location ^~ /.well-known/acme-challenge/ {
        root /var/www/acme;
    }
    location / { return 301 https://grafana.example.com$request_uri; }
}
server {
    listen 443 ssl;
    listen [::]:443 ssl;
    server_name grafana.example.com;
    ssl_certificate /etc/letsencrypt/live/grafana.example.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/grafana.example.com/privkey.pem;
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_session_cache shared:GrafanaTLS:10m;
    ssl_session_timeout 1d;
    add_header Strict-Transport-Security "max-age=31536000" always;
    add_header X-Content-Type-Options nosniff always;
    # Optional management/VPN allowlist, ONLY after ACME/bootstrap works:
    # allow 192.0.2.0/24;
    # deny all;
    location / {
        proxy_pass http://grafana_backend;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $remote_addr;
        proxy_set_header X-Forwarded-Proto https;
        proxy_set_header Connection "";
        proxy_read_timeout 60s;
    }
    location /api/live/ {
        proxy_pass http://grafana_backend;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $remote_addr;
        proxy_set_header X-Forwarded-Proto https;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $grafana_connection_upgrade;
        proxy_read_timeout 3600s;
    }
}