nginx_jaeger_proxy.conf

server {
    # We remap the jaeger otlp http port to 4319
    listen 4318 default_server;
    server_name _;
    location / {
        # Take care of preflight requests
        if ($request_method = 'OPTIONS') {
             add_header 'Access-Control-Max-Age' 1728000;
             add_header 'Access-Control-Allow-Origin' '*' always;
             add_header 'Access-Control-Allow-Headers' 'Accept,Accept-Language,Content-Language,Content-Type' always;
             add_header 'Access-Control-Allow-Credentials' 'true' always;
             add_header 'Content-Type' 'text/plain charset=UTF-8';
             add_header 'Content-Length' 0;
             return 204;
        }

        add_header 'Access-Control-Allow-Origin' '*' always;
        add_header 'Access-Control-Allow-Credentials' 'true' always;
        add_header 'Access-Control-Allow-Headers' 'Accept,Accept-Language,Content-Language,Content-Type' always;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_pass http://localhost:4319;
    }
}