[DOC] ServiceMesh documentation

Add instructions for SM Installation (addon guide), ONAP configuration
(customize_override) and access guide

Issue-ID: OOM-3006

Signed-off-by: Andreas Geissler <andreas-geissler@telekom.de>
Change-Id: I31acad2c8c84ed3382e1c43897333f9ff565ff6d
diff --git a/docs/sections/resources/yaml/kiali-ingress.yaml b/docs/sections/resources/yaml/kiali-ingress.yaml
new file mode 100644
index 0000000..44f8062
--- /dev/null
+++ b/docs/sections/resources/yaml/kiali-ingress.yaml
@@ -0,0 +1,30 @@
+apiVersion: networking.istio.io/v1beta1
+kind: Gateway
+metadata:
+  name: kiali-gateway
+spec:
+  selector:
+    istio: ingressgateway
+  servers:
+    - hosts:
+        - kiali.simpledemo.onap.org
+      port:
+        name: http
+        number: 80
+        protocol: HTTP
+---
+apiVersion: networking.istio.io/v1beta1
+kind: VirtualService
+metadata:
+  name: kiali-service
+spec:
+  hosts:
+    - kiali.simpledemo.onap.org
+  gateways:
+    - kiali-gateway
+  http:
+    - route:
+      - destination:
+          port:
+            number: 20001
+          host: kiali
\ No newline at end of file