Install for a remote cluster using an external control plane.

The templates in this directory are copies of base and istio-discovery templates.

and allows a bit more flexibility.
- the dedicated pilot-per-ingress is required if the gateway needs to support k8s-style ingress.

# Port and basic host configuration

In order to configure the Service object, the install/upgrade needs to provide a list of all ports.
In the past, this was done when installing/upgrading full istio, and involved some duplication - ports configured
both in upgrade, Gateway and VirtualService.

# Migration from istio-system

Istio 1.0 includes the gateways in istio-system. Since the external IP is associated
with the Service and bound to the namespace, it is recommended to:

1. Install the new gateway in a new namespace.
2. Copy any TLS certificate to the new namespace, and configure the domains.
3. Checking the new gateway work - for example by overriding the IP in /etc/hosts