TLS Handshake EOF Errors on Ubuntu 22.04

[n1md4]

TLS Handshake EOF Errors on Ubuntu 22.04

Environment

• Sensu Version: 6.13.1+ee (built with go1.23.4)
• OS: Ubuntu 22.04
• Deployment: sensu-puppet module

Issue

Backend logs show TLS handshake errors:

http: TLS handshake error from x.x.x.x:xxxxx: EOF

System Details

OpenSSL:

OpenSSL 3.0.2 15 Mar 2022 libssl3:amd64 3.0.2-0ubuntu1.19

Kernel:

net.ipv4.tcp_available_ulp = espintcp mptcp tls

Certificate Configuration

Current certificate has:

X509v3 Subject Alternative Name:
    DNS:server.domain.example.com

Agent configuration:

backend-url:
- wss://server.domain.example.com:8081

Questions

1. Are there known OpenSSL 3.0 compatibility issues with Sensu Go 6.13.1?
2. What are the certificate requirements for Sensu with OpenSSL 3.0?
3. Could the EOF errors be related to certificate validation?