Kiali as an example

gistfile1.tf

resource "kubernetes_manifest" "virtualservice_istio_system_kiali_vs" {
  depends_on = [
    kubernetes_manifest.k8s-istio-gateway
  ]
  provider = kubernetes
  manifest = {
    "apiVersion" = "networking.istio.io/v1alpha3"
    "kind" = "VirtualService"
    "metadata" = {
      "name" = "kiali-vs"
      "namespace" = "istio-system"
    }
    "spec" = {
      "gateways" = [
        "istio-system/istio-gateway",
      ]
      "hosts" = [
        "kiali.k8s.test.com",
      ]
      "http" = [
        {
          "route" = [
            {
              "destination" = {
                "host" = "kiali"
                "port" = {
                  "number" = 20001
                }
              }
            },
          ]
        },
      ]
    }
  }
}

resource "kubernetes_manifest" "destinationrule_istio_system_kiali" {
  manifest = {
    "apiVersion" = "networking.istio.io/v1alpha3"
    "kind" = "DestinationRule"
    "metadata" = {
      "name" = "kiali"
      "namespace" = "istio-system"
    }
    "spec" = {
      "host" = "kiali"
      "trafficPolicy" = {
        "tls" = {
          "mode" = "DISABLE"
        }
      }
    }
  }
}