Running as the haproxy user in 2.4 leaved haproxy unable to start - cannot bind socket (Permission denied) [0.0.0.0:80] · Issue #160 · docker-library/ haproxy · GitHub
SOLVED* ERROR: for frontend haproxy_v4_http: cannot bind socket (Permission denied) · Issue #110 · WhatsApp/proxy · GitHub
![ubuntu - HAproxy loadbalancer error 503 Service Unavailable No server is available to handle this request - Stack Overflow ubuntu - HAproxy loadbalancer error 503 Service Unavailable No server is available to handle this request - Stack Overflow](https://i.stack.imgur.com/zFGmJ.png)