Update istio docs according latest istio release (#3646)

* Update istio docs according latest istio release

* Rename skywalingadapter.yml to skywalkingadapter.yml

Rename typo file name.

* Update README.md

Add a link to doc.

* Update README.md

docs/en/setup/istio/README.md

@@ -13,5 +13,12 @@ Follow the [deploying backend in kubernetes](../backend/backend-k8s.md) to insta
 
 ## Setup Istio to send metrics to oap
 
-The SkyWalking uses Istio bypass adapter collects metrics. Use `kubectl apply -f` with the `yaml`(s) in [the yaml folder](yaml) to setup.
-
+1. Install Istio metric template
+
+`kubectl apply -f https://raw.githubusercontent.com/istio/istio/1.3.3/mixer/template/metric/template.yaml`
+
+2. Install SkyWalking adapter
+
+`kubectl apply -f skywalkingadapter.yml`
+
+Find the `skywalkingadapter.yml` at [here](yaml/skywalkingadapter.yml).

docs/en/setup/istio/yaml/skywalkingadapter.yml

@@ -0,0 +1,77 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+apiVersion: "config.istio.io/v1alpha2"
+kind: adapter
+metadata:
+  name: swadapter
+  namespace: istio-system
+spec:
+  description:
+  session_based: false
+  templates:
+  - metric
+---
+
+apiVersion: "config.istio.io/v1alpha2"
+kind: handler
+metadata:
+  name: sw
+  namespace: istio-system
+spec:
+  adapter: swadapter
+  connection:
+    address: "oap.skywalking.svc.cluster.local:11800"
+---
+
+# instance for template metric
+apiVersion: "config.istio.io/v1alpha2"
+kind: instance
+metadata:
+  name: swmetric
+  namespace: istio-system
+spec:
+  template: metric
+  params:
+    value: request.size | 0
+    dimensions:
+      sourceService: source.workload.name | ""
+      sourceNamespace: source.workload.namespace | ""
+      sourceUID: source.uid | ""
+      destinationService: destination.workload.name | ""
+      destinationNamespace: destination.workload.namespace | ""
+      destinationUID: destination.uid | ""
+      requestMethod: request.method | ""
+      requestPath: request.path | ""
+      requestScheme: request.scheme | ""
+      requestTime: request.time
+      responseTime: response.time
+      responseCode: response.code | 200
+      reporter: conditional((context.reporter.kind | "inbound") == "outbound", "source", "destination")
+      apiProtocol: api.protocol | ""
+---
+
+# rule to dispatch to handler sw
+apiVersion: "config.istio.io/v1alpha2"
+kind: rule
+metadata:
+  name: swmetric-rule
+  namespace: istio-system
+spec:
+  actions:
+    - handler: sw.istio-system
+      instances:
+        - swmetric