新增learn-kubernetes（https://github.com/yyong-brs/learn-kubernetes）相关文件

learn/learn-kubernetes-master/kiamol/ch09/lab/README.md

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+# Ch09 lab
+
+Run v1 of the app:
+
+```
+kubectl apply -f lab/v1/
+```
+
+Get the URL and browse:
+
+```
+kubectl get svc vweb -o jsonpath='http://{.status.loadBalancer.ingress[0].*}:8090'
+```
+
+> v1 is the blue deployment
+
+## Sample Solution
+
+My [v2 Deployment](solution/vweb-v2.yaml) runs four Pods from the v2 image. It's a new Deployment object, not an update to the existing v1 Deployment.
+
+My [Service update](solution/vweb-service-v2.yaml) changes the label selector in the existing service to point to the Pods in the v2 Deployment.
+
+```
+kubectl apply -f lab/solution/
+```
+
+> v2 is the green deployment
+
+You can flip between blue and green by updating just the Service:
+
+```
+# for v1
+kubectl apply -f lab/v1/vweb-service-v1.yaml
+```
+
+```
+# for v2
+kubectl apply -f lab/solution/vweb-service-v2.yaml
+```
+
+> Your browser may cache the response, so be sure to do a full refresh (usually Ctrl-F5 on Windows and Cmd+Shift+R on Mac)
+
+## Teardown
+
+Delete the lab resources by their labels:
+
+```
+kubectl delete all -l kiamol=ch09-lab
+```

learn/learn-kubernetes-master/kiamol/ch09/lab/solution/vweb-service-v2.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: vweb
+  labels:
+    kiamol: ch09-lab
+spec:
+  ports:
+    - port: 8090
+      targetPort: http
+  selector:
+    app: vweb
+    version: v2
+  type: LoadBalancer

learn/learn-kubernetes-master/kiamol/ch09/lab/solution/vweb-v2.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: vweb-v2
+  labels:
+    kiamol: ch09-lab
+    app: vweb
+spec:
+  replicas: 4
+  selector:
+    matchLabels:
+      app: vweb
+      version: v2
+  template:
+    metadata:
+      labels:
+        app: vweb
+        version: v2
+    spec:
+      containers:
+        - name: web
+          image: kiamol/ch09-vweb:v2
+          ports:
+            - name: http
+              containerPort: 80
+

learn/learn-kubernetes-master/kiamol/ch09/lab/v1/vweb-service-v1.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: vweb
+  labels:
+    kiamol: ch09-lab
+spec:
+  ports:
+    - port: 8090
+      targetPort: http
+  selector:
+    app: vweb
+    version: v1
+  type: LoadBalancer

learn/learn-kubernetes-master/kiamol/ch09/lab/v1/vweb-v1.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: vweb-v1
+  labels:
+    kiamol: ch09-lab   
+    app: vweb
+spec:
+  replicas: 4
+  selector:
+    matchLabels:
+      app: vweb
+      version: v1
+  template:
+    metadata:
+      labels:
+        app: vweb
+        version: v1
+    spec:
+      containers:
+        - name: web
+          image: kiamol/ch09-vweb:v1
+          ports:
+            - name: http
+              containerPort: 80
+