gitlab.clusters.ovh has no CNAME records.
Question and response
Question
dig gitlab.clusters.ovh. NS
Answer
The response has no answer records.
Authority
clusters.ovh. 22 SOA dns105.ovh.net. tech.ovh.net. 2026021300 86400 3600 3600000 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0