How to setup Health check load balancer on nginx?

Question

Nginx

Hello, there are 3 nodes that are added to upstream on nginx. Services are raised on them:
1) Web
2) Transmission / reception of data via tcp (abbreviation mci)
Each port has its own API. The task is the following - it is necessary to check the availability of servers using their api using get (for web) and post (for tcp) requests.

stream {
    upstream mci_balancing {      
        server 172.22.5.32:37911 fail_timeout=3s;
        server 172.22.5.33:37911 fail_timeout=3s;
        server 172.22.5.34:37911 fail_timeout=3s;
    
    #По MCI - вот такой POST запрос <IRIS Version="1" Message="StatusRequest"></IRIS>			
  }
    server {
        listen        37911;
        proxy_pass    mci_balancing;
        proxy_timeout 3s;
        proxy_connect_timeout 1s;
    }
}
http {
    upstream web_server {
    ip_hash; #для сохранения сессии авторизации
        server 172.22.5.32:8001;
        server 172.22.5.33:8001;
        server 172.22.5.34:8001;

#GET /?{%22request%22:%22ping%22

    keepalive 64;
    }
  server {
        listen 80;
        location / {
            proxy_pass http://web_server;
      proxy_redirect     off;
            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_set_header   X-Forwarded-Host $server_name;

    }
  }
}

In addition, for MCI, it is necessary to direct all traffic to 1 any working node and only when it fails, switch all traffic to another.
Tell me how you can implement standard or not very free nginx tools

Answer 1

ngx_stream_upstream_check_module for tcp (stream)
nginx_upstream_check_module for http (upstream)
But Haproxy is much more convenient, although there is a GPL v2 license, which is not suitable for me.