* Updates docs with ingress Host header changes
Clarify that a Host header is required for L7 protocols, and specify
that the default is to use the Consul DNS ingress subdomain
* Add sentence about using '*' by itself for testing
* Add optional step for using L7 routing config
* Note that port numbers may need to be added in the Hosts field
The DNS resolution will be handled by Envoy and defaults to LOGICAL_DNS. This discovery type can be overridden on a per-gateway basis with the envoy_dns_discovery_type Gateway Option.
If a service contains an instance with a hostname as an address we set the Envoy cluster to use DNS as the discovery type rather than EDS. Since both mesh gateways and terminating gateways route to clusters using SNI, whenever there is a mix of hostnames and IP addresses associated with a service we use the hostname + CDS rather than the IPs + EDS.
Note that we detect hostnames by attempting to parse the service instance's address as an IP. If it is not a valid IP we assume it is a hostname.
This PR contains documentation additions for ingress and terminating gateways. New pages for the config-entries and overall feature description were added, as well as various additions to related pages.
Co-authored-by: Jono Sosulska <42216911+jsosulska@users.noreply.github.com>
Co-authored-by: freddygv <gh@freddygv.xyz>
Co-authored-by: Freddy <freddygv@users.noreply.github.com>
Co-authored-by: kaitlincarter-hc <43049322+kaitlincarter-hc@users.noreply.github.com>
Freddy