How to use external certificates for ingress of K8s

does ingress tls have to configure a certificate?
my backend service has its own certificate and supports https,. So how to configure it?
just like K8s" own apiserver, how do you configure the ingress proxy apiserver?

K8s
Mar.19,2021
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b38a35-2c138.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b38a35-2c138.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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