intermediate · ~10 min

Moved out

Ticket from Priya Raman, senior backend developer

cart calls the payment gateway as http://paygate. Platform is moving the gateway to our provider this morning, at api.paygate.example.

I'd rather not rebuild and redeploy cart for a hostname. Can the cluster keep answering paygate for us?

ExternalName Services

A Service with type: ExternalName is a DNS alias: cluster DNS answers its name with a CNAME to externalName. No cluster IP, no endpoints, no proxying — the client connects straight to the outside host, and the Host header it sends still says the alias, which some providers reject. Docs

Objectives

paygate resolves to api.paygate.example inside the cluster
Bonus: Leave cart's own config untouched

Best on a computer with a keyboard. It works on a phone, with shortcuts under the terminal.