Letsencrypt failing when I reconfigure

GitLab CI/CD
4

There are references about another similar issue here: LetsEncrypt certificates fail in domain validation
It seems the same error:

  • “There was an error running gitlab-ctl reconfigure”
  • “Validation failed for domain”

Restarting from the initial steps(if not dangerous) is a good way when trying to understand/solve the error. The certificate can also be verified with the s_client command (-servername and -connect are useful options): /docs/manmaster/man1/s_client.html

NOTES

s_client can be used to debug SSL servers. To connect to an SSL HTTP server the command:

 openssl s_client -connect servername:443

If -servername is not provided, the TLS SNI extension will be populated with the name given to -connect if it follows a DNS name format.

   s_client
       This implements a generic SSL/TLS client which can establish a transparent connection to a remote server speaking SSL/TLS. It's intended for testing purposes only and provides only
       rudimentary interface functionality but internally uses mostly all functionality of the OpenSSL ssl library.
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