Type Definition k8s_gateway_api::Hostname

pub type Hostname = String;

Hostname is the fully qualified domain name of a network host. This matches the RFC 1123 definition of a hostname with 2 notable exceptions:

1. IPs are not allowed.
2. A hostname may be prefixed with a wildcard label (*.). The wildcard label must appear by itself as the first label.

Hostname can be “precise” which is a domain name without the terminating dot of a network host (e.g. “foo.example.com”) or “wildcard”, which is a domain name prefixed with a single wildcard label (e.g. *.example.com).

Note that as per RFC1035 and RFC1123, a label must consist of lower case alphanumeric characters or ‘-’, and must start and end with an alphanumeric character. No other punctuation is allowed.