Docs for serverless (#1443)

* Add doc, To #37688693
Signed-off-by: cheyang <cheyang@163.com>

* Build docker image, To #39482462
Signed-off-by: cheyang <cheyang@163.com>

* Build docker image, To #39482462
Signed-off-by: cheyang <cheyang@163.com>

* Build docker image, To #39482462
Signed-off-by: cheyang <cheyang@163.com>

* Fluid for serverless, To #37688693
Signed-off-by: cheyang <cheyang@163.com>

* Fluid for serverless, To #37688693
Signed-off-by: cheyang <cheyang@163.com>

* Fluid for serverless, To #37688693
Signed-off-by: cheyang <cheyang@163.com>

* Fluid for serverless, To #37688693
Signed-off-by: cheyang <cheyang@163.com>

* Fluid for serverless, To #37688693
Signed-off-by: cheyang <cheyang@163.com>

* Fix update dataload status error, To #37688693
Signed-off-by: cheyang <cheyang@163.com>

* Build docker image, To #39482462
Signed-off-by: cheyang <cheyang@163.com>

* Build docker image, To #39482462
Signed-off-by: cheyang <cheyang@163.com>

* Build docker image, To #39482462
Signed-off-by: cheyang <cheyang@163.com>

* Fluid for serverless, To #37688693
Signed-off-by: cheyang <cheyang@163.com>

* Fluid for serverless, To #37688693
Signed-off-by: cheyang <cheyang@163.com>

* Fluid for serverless, To #37688693
Signed-off-by: cheyang <cheyang@163.com>

* Fluid for serverless, To #37688693
Signed-off-by: cheyang <cheyang@163.com>

* Add volume, To #38946668
Signed-off-by: cheyang <cheyang@163.com>

* Add volume, To #38946668
Signed-off-by: cheyang <cheyang@163.com>

* Add doc, To #38946668
Signed-off-by: cheyang <cheyang@163.com>

* Add doc, To #38946668
Signed-off-by: cheyang <cheyang@163.com>

* Fluid for serverless, To #37688693
Signed-off-by: cheyang <cheyang@163.com>

* Add doc, To #38946668
Signed-off-by: cheyang <cheyang@163.com>

* Fix ut, To #38946668
Signed-off-by: cheyang <cheyang@163.com>

* Fix ut, To #38946668
Signed-off-by: cheyang <cheyang@163.com>

* Update docs, To #39482462
Signed-off-by: cheyang <cheyang@163.com>

docs/zh/TOC.md

@@ -30,6 +30,7 @@
 + 进阶使用
   - [AlluxioRuntime分层存储配置](samples/tieredstore_config.md)
   - [通过Webhook机制优化Pod调度](operation/pod_schedule.md)
+  - [如何在Knative环境运行](samples/knative.md)
   - [如何开启 FUSE 自动恢复能力](samples/fuse_recover.md)
 + 工作负载
   - [机器学习](samples/machinelearning.md)

docs/zh/operation/pod_schedule.md

@@ -8,7 +8,7 @@ Fluid结合根据数据集排布的Pod调度策略，通过webhook机制将调
 
 ## 前提条件
 
-您使用的k8s版本需要支持 admissionregistration.k8s.io/v1beta1（ Kubernetes version > 1.14 )
+您使用的k8s版本需要支持 admissionregistration.k8s.io/v1（ Kubernetes version > 1.16 )
 启用允许控制器集需要通过向 Kubernetes API 服务器传递一个标志来配置，确保你的集群进行了正常的配置
 ```yaml
 --enable-admission-plugins=MutatingAdmissionWebhook

docs/zh/samples/knative.md

+# 示例 - 如何运行在以Knative为例的Serverless环境中
+
+本示例以开源框架Knative为例子，演示如何在Serverless环境中通过Fluid进行统一的数据加速，本例子以AlluxioRuntime为例，实际上Fluid支持所有的Runtime运行在Serverless环境。
+
+
+## 安装
+
+1.根据[Knative文档](https://knative.dev/docs/install/serving/install-serving-with-yaml/)安装Knative Serving v1.2，需要开启[kubernetes.Deploymentspec-persistent-volume-claim](https://github.com/knative/serving/blob/main/config/core/configmaps/features.yaml#L156)。
+
+检查 Knative的组件是否正常运行
+
+```
+kubectl get Deployments -n knative-serving
+```
+
+> 注：本文只是作为演示目的，关于Knative的生产系统安装请参考Knative文档最佳实践进行部署。另外由于Knative的容器镜像都在gcr.io镜像仓库，请确保镜像可达。
+如果您使用的是阿里云，您也可以直接使用[阿里云ACK的托管服务](https://help.aliyun.com/document_detail/121508.html)降低配置Knative的复杂度。
+
+2. 请参考[安装文档](../userguide/install.md)安装Fluid最新版, 安装后检查 Fluid 各组件正常运行（这里以 AlluxioRuntime 为例）：
+
+```shell
+$ kubectl get deploy -n fluid-system
+NAME                        READY   UP-TO-DATE   AVAILABLE   AGE
+alluxioruntime-controller   1/1     1            1           18m
+dataset-controller          1/1     1            1           18m
+fluid-webhook               1/1     1            1           18m
+```
+
+通常来说，你会看到一个名为 `dataset-controller` 的 Deployment、一个名为 `alluxioruntime-controller` 的 Deployment、一个名为 `fluid-webhook` 的 Deployment。
+
+## 配置
+
+**为namespace添加标签**
+
+为namespace添加标签fluid.io/enable-injection后，可以开启此namespace下Pod的调度优化功能
+
+```bash
+$ kubectl label namespace default fluid.io/enable-injection=true
+```
+
+## 运行示例
+
+
+**创建 dataset 和 runtime**
+
+针对不同类型的 runtime 创建相应的 Runtime 资源，以及同名的 Dataset。这里以 AlluxioRuntime 为例, 以下为Dataset内容
+
+```yaml
+$ cat<<EOF >dataset.yaml
+apiVersion: data.fluid.io/v1alpha1
+kind: Dataset
+metadata:
+  name: serverless-data
+spec:
+  mounts:
+    - mountPoint: https://mirrors.bit.edu.cn/apache/hbase/stable/
+      name: hbase
+      path: "/"
+  accessModes:
+    - ReadOnlyMany
+---
+apiVersion: data.fluid.io/v1alpha1
+kind: AlluxioRuntime
+metadata:
+  name: serverless-data
+spec:
+  replicas: 2
+  tieredstore:
+    levels:
+      - mediumtype: MEM
+        path: /dev/shm
+        quota: 2Gi
+        high: "0.95"
+        low: "0.7"
+EOF
+```
+
+执行创建Dataset操作
+
+```
+$ kubectl create -f dataset.yaml
+```
+
+查看Dataset状态
+
+
+```shell
+$ kubectl get alluxio
+NAME              MASTER PHASE   WORKER PHASE   FUSE PHASE   AGE
+serverless-data   Ready          Ready          Ready        4m52s
+$ kubectl get dataset
+NAME              UFS TOTAL SIZE   CACHED   CACHE CAPACITY   CACHED PERCENTAGE   PHASE   AGE
+serverless-data   566.22MiB        0.00B    4.00GiB          0.0%                Bound   4m52s
+```
+
+**创建 Knative Serving 资源对象**
+
+```yaml
+$ cat<<EOF >serving.yaml
+apiVersion: serving.knative.dev/v1
+kind: Service
+metadata:
+  name: model-serving
+spec:
+  template:
+    metadata:
+      labels:
+        app: model-serving
+        serverless.fluid.io/inject: "true"
+      annotations:
+        autoscaling.knative.dev/target: "10"
+        autoscaling.knative.dev/scaleDownDelay: "30m"
+        autoscaling.knative.dev/minScale: "1"
+    spec:
+      containers:
+        - image: fluidcloudnative/serving
+          ports:
+            - name: http1
+              containerPort: 8080
+          env:
+            - name: TARGET
+              value: "World"
+          volumeMounts:
+            - mountPath: /data
+              name: data
+              readOnly: true
+      volumes:
+        - name: data
+          persistentVolumeClaim:
+            claimName: serverless-data
+            readOnly: true
+  EOF
+$ kubectl create -f serving.yaml
+service.serving.knative.dev/model-serving created
+```
+
+请在podSpec或者podTemplateSpec中的label中配置`serverless.fluid.io/inject: "true"`
+
+
+**查看 Knative Serving 是否创建，并检查 fuse-container 是否注入**
+
+```shell
+$ kubectl get po
+NAME                                              READY   STATUS    RESTARTS   AGE
+model-serving-00001-deployment-64d674d75f-46vvf   3/3     Running   0          76s
+serverless-data-master-0                          2/2     Running   0          16m
+serverless-data-worker-0                          2/2     Running   0          16m
+serverless-data-worker-1                          2/2     Running   0          16m
+$ kubectl get po model-serving-00001-deployment-64d674d75f-46vvf -oyaml| grep -i fluid-fuse -B 3
+          - /opt/alluxio/integration/fuse/bin/alluxio-fuse
+          - unmount
+          - /runtime-mnt/alluxio/default/serverless-data/alluxio-fuse
+    name: fluid-fuse
+```
+
+查看 Knative Serving 启动速度,可以看到启动加载数据的时间是**43s**
+
+
+```shell
+$ kubectl logs model-serving-00001-deployment-64d674d75f-46vvf -c user-container
+Begin loading models at 16:29:02
+
+real  0m43.480s
+user  0m0.001s
+sys 0m0.956s
+Finish loading models at 16:29:45
+2022-02-15 16:29:45 INFO Hello world sample started.
+```
+
+
+清理knative serving实例
+
+```
+$ kubectl delete -f serving.yaml
+```
+
+**执行数据预热**
+
+创建dataload对象，并查看状态：
+
+```yaml
+$ cat<<EOF >dataload.yaml
+apiVersion: data.fluid.io/v1alpha1
+kind: DataLoad
+metadata:
+  name: serverless-dataload
+spec:
+  dataset:
+    name: serverless-data
+    namespace: default
+  EOF
+$ kubectl create -f dataload.yaml
+dataload.data.fluid.io/serverless-dataload created
+$ kubectl get dataload
+NAME                  DATASET           PHASE      AGE     DURATION
+serverless-dataload   serverless-data   Complete   2m43s   34s
+```
+
+检查此时的缓存状态, 目前已经将数据完全缓存到集群中
+
+```
+$ kubectl get dataset
+NAME              UFS TOTAL SIZE   CACHED      CACHE CAPACITY   CACHED PERCENTAGE   PHASE   AGE
+serverless-data   566.22MiB        566.22MiB   4.00GiB          100.0%              Bound   33m
+```
+
+再次创建Knative服务：
+
+```shell
+$ kubectl create -f serving.yaml
+service.serving.knative.dev/model-serving created
+```
+
+此时查看启动时间发现当前启动加载数据的时间是**2.19s**, 变成没有预热的情况下性能的**1/20**
+
+```
+kubectl logs model-serving-00001-deployment-6cb54f94d7-dbgxf -c user-container
+Begin loading models at 18:38:23
+
+real  0m2.190s
+user  0m0.000s
+sys 0m0.899s
+Finish loading models at 18:38:25
+2022-02-15 18:38:25 INFO Hello world sample started.
+```
+
+> 注： 本例子使用的是Knative serving，如果您没有Knative环境，也可以使用Deployment进行实验。
+
+```yaml
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: model-serving
+spec:
+  selector:
+    matchLabels:
+      app: model-serving
+  template:
+    metadata:
+      labels:
+        app: model-serving
+        serverless.fluid.io/inject: "true"
+      annotations:
+        autoscaling.knative.dev/target: "10"
+        autoscaling.knative.dev/scaleDownDelay: "30m"
+        autoscaling.knative.dev/minScale: "1"
+    spec:
+      containers:
+        - image: fluidcloudnative/serving
+          name: serving
+          ports:
+            - name: http1
+              containerPort: 8080
+          env:
+            - name: TARGET
+              value: "World"
+          volumeMounts:
+            - mountPath: /data
+              name: data
+      volumes:
+        - name: data
+          persistentVolumeClaim:
+            claimName: serverless-data
+```

integration/knative/kourier.yaml

+# Copyright 2020 The Knative Authors
+#
+# Licensed 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
+#
+#     https://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: v1
+kind: Namespace
+metadata:
+  name: kourier-system
+  labels:
+    networking.knative.dev/ingress-provider: kourier
+    app.kubernetes.io/name: knative-serving
+    app.kubernetes.io/component: net-kourier
+    app.kubernetes.io/version: "1.2.0"
+    serving.knative.dev/release: "v1.2.0"
+
+---
+# Copyright 2020 The Knative Authors
+#
+# Licensed 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
+#
+#     https://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: v1
+kind: ConfigMap
+metadata:
+  name: kourier-bootstrap
+  namespace: kourier-system
+  labels:
+    networking.knative.dev/ingress-provider: kourier
+    app.kubernetes.io/component: net-kourier
+    app.kubernetes.io/version: "1.2.0"
+    app.kubernetes.io/name: knative-serving
+    serving.knative.dev/release: "v1.2.0"
+data:
+  envoy-bootstrap.yaml: |
+    dynamic_resources:
+      ads_config:
+        transport_api_version: V3
+        api_type: GRPC
+        rate_limit_settings: {}
+        grpc_services:
+        - envoy_grpc: {cluster_name: xds_cluster}
+      cds_config:
+        resource_api_version: V3
+        ads: {}
+      lds_config:
+        resource_api_version: V3
+        ads: {}
+    node:
+      cluster: kourier-knative
+      id: 3scale-kourier-gateway
+    static_resources:
+      listeners:
+        - name: stats_listener
+          address:
+            socket_address:
+              address: 0.0.0.0
+              port_value: 9000
+          filter_chains:
+            - filters:
+                - name: envoy.filters.network.http_connection_manager
+                  typed_config:
+                    "@type": type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager
+                    stat_prefix: stats_server
+                    http_filters:
+                      - name: envoy.filters.http.router
+                    route_config:
+                      virtual_hosts:
+                        - name: admin_interface
+                          domains:
+                            - "*"
+                          routes:
+                            - match:
+                                safe_regex:
+                                  google_re2: {}
+                                  regex: '/(certs|stats(/prometheus)?|server_info|clusters|listeners|ready)?'
+                                headers:
+                                  - name: ':method'
+                                    exact_match: GET
+                              route:
+                                cluster: service_stats
+      clusters:
+        - name: service_stats
+          connect_timeout: 0.250s
+          type: static
+          load_assignment:
+            cluster_name: service_stats
+            endpoints:
+              lb_endpoints:
+                endpoint:
+                  address:
+                    pipe:
+                      path: /tmp/envoy.admin
+        - name: xds_cluster
+          connect_timeout: 1s
+          type: strict_dns
+          load_assignment:
+            cluster_name: xds_cluster
+            endpoints:
+              lb_endpoints:
+                endpoint:
+                  address:
+                    socket_address:
+                      address: "net-kourier-controller.knative-serving"
+                      port_value: 18000
+          http2_protocol_options: {}
+          type: STRICT_DNS
+    admin:
+      access_log_path: "/dev/stdout"
+      address:
+        pipe:
+          path: /tmp/envoy.admin
+
+---
+# Copyright 2021 The Knative Authors
+#
+# Licensed 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
+#
+#     https://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: v1
+kind: ConfigMap
+metadata:
+  name: config-kourier
+  namespace: knative-serving
+  labels:
+    networking.knative.dev/ingress-provider: kourier
+    app.kubernetes.io/component: net-kourier
+    app.kubernetes.io/version: "1.2.0"
+    app.kubernetes.io/name: knative-serving
+    serving.knative.dev/release: "v1.2.0"
+data:
+  _example: |
+    ################################
+    #                              #
+    #    EXAMPLE CONFIGURATION     #
+    #                              #
+    ################################
+
+    # This block is not actually functional configuration,
+    # but serves to illustrate the available configuration
+    # options and document them in a way that is accessible
+    # to users that `kubectl edit` this config map.
+    #
+    # These sample configuration options may be copied out of
+    # this example block and unindented to be in the data block
+    # to actually change the configuration.
+
+    # Specifies whether requests reaching the Kourier gateway
+    # in the context of services should be logged. Readiness
+    # probes etc. must be configured via the bootstrap config.
+    enable-service-access-logging: "true"
+
+---
+# Copyright 2020 The Knative Authors
+#
+# Licensed 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
+#
+#     https://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: v1
+kind: ServiceAccount
+metadata:
+  name: net-kourier
+  namespace: knative-serving
+  labels:
+    networking.knative.dev/ingress-provider: kourier
+    app.kubernetes.io/component: net-kourier
+    app.kubernetes.io/version: "1.2.0"
+    app.kubernetes.io/name: knative-serving
+    serving.knative.dev/release: "v1.2.0"
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: net-kourier
+  namespace: knative-serving
+  labels:
+    networking.knative.dev/ingress-provider: kourier
+    app.kubernetes.io/component: net-kourier
+    app.kubernetes.io/version: "1.2.0"
+    app.kubernetes.io/name: knative-serving
+    serving.knative.dev/release: "v1.2.0"
+rules:
+  - apiGroups: [""]
+    resources: ["events"]
+    verbs: ["create", "update", "patch"]
+  - apiGroups: [""]
+    resources: ["pods", "endpoints", "services", "secrets"]
+    verbs: ["get", "list", "watch"]
+  - apiGroups: [""]
+    resources: ["configmaps"]
+    verbs: ["get", "list", "watch"]
+  - apiGroups: ["coordination.k8s.io"]
+    resources: ["leases"]
+    verbs: ["get", "list", "create", "update", "delete", "patch", "watch"]
+  - apiGroups: ["networking.internal.knative.dev"]
+    resources: ["ingresses"]
+    verbs: ["get", "list", "watch", "patch"]
+  - apiGroups: ["networking.internal.knative.dev"]
+    resources: ["ingresses/status"]
+    verbs: ["update"]
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: net-kourier
+  labels:
+    networking.knative.dev/ingress-provider: kourier
+    app.kubernetes.io/component: net-kourier
+    app.kubernetes.io/version: "1.2.0"
+    app.kubernetes.io/name: knative-serving
+    serving.knative.dev/release: "v1.2.0"
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: net-kourier
+subjects:
+  - kind: ServiceAccount
+    name: net-kourier
+    namespace: knative-serving
+
+---
+# Copyright 2020 The Knative Authors
+#
+# Licensed 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
+#
+#     https://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: apps/v1
+kind: Deployment
+metadata:
+  name: net-kourier-controller
+  namespace: knative-serving
+  labels:
+    networking.knative.dev/ingress-provider: kourier
+    app.kubernetes.io/component: net-kourier
+    app.kubernetes.io/version: "1.2.0"
+    app.kubernetes.io/name: knative-serving
+    serving.knative.dev/release: "v1.2.0"
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: net-kourier-controller
+  template:
+    metadata:
+      labels:
+        app: net-kourier-controller
+    spec:
+      containers:
+        - image: gcr.io/knative-releases/knative.dev/net-kourier/cmd/kourier@sha256:15b60b48a85d15490f1836585c01eb939dc468727e375585e66ff4646a2c6cfc
+          name: controller
+          env:
+            - name: CERTS_SECRET_NAMESPACE
+              value: ""
+            - name: CERTS_SECRET_NAME
+              value: ""
+            - name: SYSTEM_NAMESPACE
+              valueFrom:
+                fieldRef:
+                  fieldPath: metadata.namespace
+            - name: METRICS_DOMAIN
+              value: "knative.dev/samples"
+            - name: KOURIER_GATEWAY_NAMESPACE
+              value: "kourier-system"
+          ports:
+            - name: http2-xds
+              containerPort: 18000
+              protocol: TCP
+          readinessProbe:
+            exec:
+              command: ["/ko-app/kourier", "-probe-addr=:18000"]
+          securityContext:
+            allowPrivilegeEscalation: false
+            readOnlyRootFilesystem: true
+            runAsNonRoot: true
+            capabilities:
+              drop:
+                - all
+      restartPolicy: Always
+      serviceAccountName: net-kourier
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: net-kourier-controller
+  namespace: knative-serving
+  labels:
+    networking.knative.dev/ingress-provider: kourier
+    app.kubernetes.io/component: net-kourier
+    app.kubernetes.io/version: "1.2.0"
+    app.kubernetes.io/name: knative-serving
+    serving.knative.dev/release: "v1.2.0"
+spec:
+  ports:
+    - name: grpc-xds
+      port: 18000
+      protocol: TCP
+      targetPort: 18000
+  selector:
+    app: net-kourier-controller
+  type: ClusterIP
+
+---
+# Copyright 2020 The Knative Authors
+#
+# Licensed 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
+#
+#     https://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: apps/v1
+kind: Deployment
+metadata:
+  name: 3scale-kourier-gateway
+  namespace: kourier-system
+  labels:
+    networking.knative.dev/ingress-provider: kourier
+    app.kubernetes.io/component: net-kourier
+    app.kubernetes.io/version: "1.2.0"
+    app.kubernetes.io/name: knative-serving
+    serving.knative.dev/release: "v1.2.0"
+spec:
+  strategy:
+    type: RollingUpdate
+    rollingUpdate:
+      maxUnavailable: 0
+      maxSurge: 1
+  selector:
+    matchLabels:
+      app: 3scale-kourier-gateway
+  template:
+    metadata:
+      labels:
+        app: 3scale-kourier-gateway
+      annotations:
+        # v0.26 supports envoy v3 API, so
+        # adding this label to restart pod.
+        networking.knative.dev/poke: "v0.26"
+    spec:
+      containers:
+        - args:
+            - --base-id 1
+            - -c /tmp/config/envoy-bootstrap.yaml
+            - --log-level info
+          command:
+            - /usr/local/bin/envoy
+          image: docker.io/envoyproxy/envoy:v1.18-latest
+          name: kourier-gateway
+          ports:
+            - name: http2-external
+              containerPort: 8080
+              protocol: TCP
+            - name: http2-internal
+              containerPort: 8081
+              protocol: TCP
+            - name: https-external
+              containerPort: 8443
+              protocol: TCP
+          securityContext:
+            allowPrivilegeEscalation: false
+            readOnlyRootFilesystem: false
+            runAsNonRoot: false
+            capabilities:
+              drop:
+                - all
+          volumeMounts:
+            - name: config-volume
+              mountPath: /tmp/config
+          lifecycle:
+            preStop:
+              exec:
+                command: ["/bin/sh", "-c", "curl -X POST --unix /tmp/envoy.admin http://localhost/healthcheck/fail; sleep 15"]
+          readinessProbe:
+            httpGet:
+              httpHeaders:
+                - name: Host
+                  value: internalkourier
+              path: /ready
+              port: 8081
+              scheme: HTTP
+            initialDelaySeconds: 10
+            periodSeconds: 5
+      volumes:
+        - name: config-volume
+          configMap:
+            name: kourier-bootstrap
+      restartPolicy: Always
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: kourier
+  namespace: kourier-system
+  labels:
+    networking.knative.dev/ingress-provider: kourier
+    app.kubernetes.io/component: net-kourier
+    app.kubernetes.io/version: "1.2.0"
+    app.kubernetes.io/name: knative-serving
+    serving.knative.dev/release: "v1.2.0"
+spec:
+  ports:
+    - name: http2
+      port: 80
+      protocol: TCP
+      targetPort: 8080
+    - name: https
+      port: 443
+      protocol: TCP
+      targetPort: 8443
+  selector:
+    app: 3scale-kourier-gateway
+  type: LoadBalancer
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: kourier-internal
+  namespace: kourier-system
+  labels:
+    networking.knative.dev/ingress-provider: kourier
+    app.kubernetes.io/component: net-kourier
+    app.kubernetes.io/version: "1.2.0"
+    app.kubernetes.io/name: knative-serving
+    serving.knative.dev/release: "v1.2.0"
+spec:
+  ports:
+    - name: http2
+      port: 80
+      protocol: TCP
+      targetPort: 8081
+  selector:
+    app: 3scale-kourier-gateway
+  type: ClusterIP
+
+---

integration/knative/serving-hpa.yaml

+# Copyright 2019 The Knative Authors
+#
+# Licensed 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
+#
+#     https://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: apps/v1
+kind: Deployment
+metadata:
+  name: autoscaler-hpa
+  namespace: knative-serving
+  labels:
+    autoscaling.knative.dev/autoscaler-provider: hpa
+    app.kubernetes.io/component: autoscaler-hpa
+    app.kubernetes.io/name: knative-serving
+    app.kubernetes.io/version: "1.2.0"
+    serving.knative.dev/release: "v1.2.0"
+spec:
+  selector:
+    matchLabels:
+      app: autoscaler-hpa
+  template:
+    metadata:
+      annotations:
+        cluster-autoscaler.kubernetes.io/safe-to-evict: "true"
+      labels:
+        app: autoscaler-hpa
+        app.kubernetes.io/component: autoscaler-hpa
+        app.kubernetes.io/name: knative-serving
+        app.kubernetes.io/version: "1.2.0"
+        serving.knative.dev/release: "v1.2.0"
+    spec:
+      # To avoid node becoming SPOF, spread our replicas to different nodes.
+      affinity:
+        podAntiAffinity:
+          preferredDuringSchedulingIgnoredDuringExecution:
+            - podAffinityTerm:
+                labelSelector:
+                  matchLabels:
+                    app: autoscaler-hpa
+                topologyKey: kubernetes.io/hostname
+              weight: 100
+      serviceAccountName: controller
+      containers:
+        - name: autoscaler-hpa
+          # This is the Go import path for the binary that is containerized
+          # and substituted here.
+          image: gcr.io/knative-releases/knative.dev/serving/cmd/autoscaler-hpa@sha256:e3db964edf76abb4a53927039a8d3ddafb983e894c51e98b51dd0c3ebb260ccd
+          resources:
+            requests:
+              cpu: 30m
+              memory: 40Mi
+            limits:
+              cpu: 300m
+              memory: 400Mi
+          env:
+            - name: SYSTEM_NAMESPACE
+              valueFrom:
+                fieldRef:
+                  fieldPath: metadata.namespace
+            - name: CONFIG_LOGGING_NAME
+              value: config-logging
+            - name: CONFIG_OBSERVABILITY_NAME
+              value: config-observability
+            # TODO(https://github.com/knative/pkg/pull/953): Remove stackdriver specific config
+            - name: METRICS_DOMAIN
+              value: knative.dev/serving
+          securityContext:
+            allowPrivilegeEscalation: false
+            readOnlyRootFilesystem: true
+            runAsNonRoot: true
+            capabilities:
+              drop:
+                - all
+          ports:
+            - name: metrics
+              containerPort: 9090
+            - name: profiling
+              containerPort: 8008
+---
+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    app: autoscaler-hpa
+    autoscaling.knative.dev/autoscaler-provider: hpa
+    app.kubernetes.io/component: autoscaler-hpa
+    app.kubernetes.io/name: knative-serving
+    app.kubernetes.io/version: "1.2.0"
+    serving.knative.dev/release: "v1.2.0"
+  name: autoscaler-hpa
+  namespace: knative-serving
+spec:
+  ports:
+    # Define metrics and profiling for them to be accessible within service meshes.
+    - name: http-metrics
+      port: 9090
+      targetPort: 9090
+    - name: http-profiling
+      port: 8008
+      targetPort: 8008
+  selector:
+    app: autoscaler-hpa
+
+---

samples/knative/dataload.yaml

+apiVersion: data.fluid.io/v1alpha1
+kind: DataLoad
+metadata:
+  name: serverless-dataload
+spec:
+  dataset:
+    name: serverless-data
+    namespace: default

samples/knative/dataset.yaml

+apiVersion: data.fluid.io/v1alpha1
+kind: Dataset
+metadata:
+  name: serverless-data
+spec:
+  mounts:
+    - mountPoint: https://mirrors.bit.edu.cn/apache/hbase/stable/
+      name: hbase
+      path: "/"
+  accessModes:
+    - ReadOnlyMany
+---
+apiVersion: data.fluid.io/v1alpha1
+kind: AlluxioRuntime
+metadata:
+  name: serverless-data
+spec:
+  replicas: 2
+  tieredstore:
+    levels:
+      - mediumtype: MEM
+        path: /dev/shm
+        quota: 2Gi
+        high: "0.95"
+        low: "0.7"

samples/knative/docker/Dockerfile

+FROM registry.cn-hangzhou.aliyuncs.com/knative-sample/helloworld-go:160e4dc8
+
+RUN apk add bash
+
+ADD entrypoint.sh /
+
+RUN chmod u+x /entrypoint.sh
+
+CMD ["/entrypoint.sh"]

samples/knative/docker/entrypoint.sh

+#!/usr/bin/env bash
+
+# Define a timestamp function
+timestamp() {
+  date +"%T" # current time
+}
+
+echo Begin loading models at $(timestamp)
+
+time cp /data/hbase-2.4.9-client-bin.tar.gz /tmp
+
+echo Finish loading models at $(timestamp)
+
+/helloworld

samples/knative/serving.yaml

+apiVersion: serving.knative.dev/v1
+kind: Service
+metadata:
+  name: helloworld-go
+  #namespace: test
+spec:
+  template:
+    metadata:
+      labels:
+        app: helloworld-go
+        serverless.fluid.io/inject: "true"
+      annotations:
+        autoscaling.knative.dev/target: "10"
+        autoscaling.knative.dev/scaleDownDelay: "30m"
+        autoscaling.knative.dev/minScale: "1"
+    spec:
+      containers:
+        - image: fluidcloudnative/serving
+          ports:
+            - name: http1
+              containerPort: 8080
+          env:
+            - name: TARGET
+              value: "World"
+          volumeMounts:
+            - mountPath: /data
+              name: data
+              readOnly: true
+      volumes:
+        - name: data
+          persistentVolumeClaim:
+            claimName: serverless-data
+            readOnly: true