Remove --providers.kubernetesgateway.controllername which does not exist in
Traefik v3, update GatewayClass controllerName to the standard v3 value, and
use labelSelector on each instance's kubernetesGateway provider to differentiate
internal vs external traffic.
deploy traefik for internal and external applications. port forwarding
from the external routers will only occur to the IP of the
traefik-external service.
- traefik-internal and traefik-external added
- each is a different deployment
Reviewed-on: #119
unkinben