The SMCP CR accepts the configuration of customized ingress.hosts for Kiali, however this is not configured on the Kiali CR and route doesn't change.

spec:
addons:
grafana:
enabled: true
install:
service:
ingress:
enabled: true
jaeger:
install:
ingress:
enabled: true
storage:
type: Memory
kiali:
enabled: true
install:
dashboard:
enableGrafana: true
enablePrometheus: true
enableTracing: true
service:
ingress:
enabled: true
hosts:

• kiali-istio-system.<my-custom-subdomain>

In the appliedValues this is configured as well:

kiali:
dashboard:
enableGrafana: true
enablePrometheus: true
enableTracing: true
viewOnlyMode: false
enabled: true
ingress:
enabled: true
hosts:

• kiali-istio-system.<my-custom-subdomain>
  install: true
  resourceName: kiali

The problem seems to be in the operator helm resources as the Kiali CR only gets ingress.enabled value:

https://github.com/maistra/istio-operator/blob/5b41497a44e22dbaba6d2813117061ae6a9caa9e/resources/helm/v2.3/istio-telemetry/kiali/templates/kiali-cr.yaml#L29

For this to be configured we would probably need to implement the ingress.override_yaml which currently is not supported, since manually changing this in the Kiali CR the operator gets an error with not enough permissions to change Openshift Route specs:

ingress:
enabled: true
override_yaml:
spec:
host: kiali-istio-system.<my-custom-subdomain>

 "message": "Route kiali: Failed to create object: b'{\"kind\":\"Status\",\"apiVersion\":\"v1\",\"metadata\":{},\"status\":\"Failure\",\"message\":\"Route.route.openshift.io \\\\\"kiali\\\\\" is invalid: [spec.host: Forbidden: you do not have permission to set the host field of the route, spec.to.name: Required value]\",\"reason\":\"Invalid\",\"details\":{\"name\":\"kiali\",\"group\":\"route.openshift.io\",\"kind\":\"Route\",\"causes\":[

{\"reason\":\"FieldValueForbidden\",\"message\":\"Forbidden: you do not have permission to set the host field of the route\",\"field\":\"spec.host\"}

,

{\"reason\":\"FieldValueRequired\",\"message\":\"Required value\",\"field\":\"spec.to.name\"}

]},\"code\":422}
n'",

It would be important to have this implemented in order to work with router sharding since we can already change grafana and prometheus routes to the desired host.