https://www.hrbac.cz/tags/dns/ Recent content in dns on David Hrbáč Hugo -- gohugo.io en-us Wed, 26 Aug 2026 12:00:00 +0000 https://www.hrbac.cz/2026/08/rancher-migrating-server-url-to-a-new-domain-with-split-horizon-dns/ Wed, 26 Aug 2026 12:00:00 +0000 https://www.hrbac.cz/2026/08/rancher-migrating-server-url-to-a-new-domain-with-split-horizon-dns/ I recently migrated a Rancher installation from an old domain name to a new one. The setup was slightly more interesting than a simple DNS rename because Rancher was used from different network locations and the environment used split-horizon DNS. The simplified topology looked like this: local downstream clusters -> internal RR DNS -> Rancher ingress -> internal/self-signed CA remote downstream clusters -> public DNS -> F5 VIP -> public CA certificate users -> public DNS -> F5 VIP -> public CA certificate As an ASCII diagram: