Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

Deploy TiProxy with this configuration and without certificates:

security.cluster-tls.skip-ca: true
security.sql-tls.skip-ca: true

2. What did you expect to see? (Required)

TiProxy is up

3. What did you see instead (Required)

TiProxy is down

4. What is your version? (Required)

master