Deployment yaml files are outdated and throw errors when using with Kubernetes v1.19.2 (Qwiklabs)

[e2bias]

All deployment yaml files need to be updated in order to work with latest Kubernetes versions.
The apiVersion for deployment objects has changed and is now apps/v1 and also selectors are mandatory.

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: auth
spec:
  replicas: 1
  selector:
    matchLabels:      
      app: auth
      track: stable
  template:
    metadata:
      labels:
        app: auth
        track: stable
    spec:
      containers:
        - name: auth
          image: "kelseyhightower/auth:2.0.0"
          ports:
            - name: http
              containerPort: 80
            - name: health
              containerPort: 81
          resources:
            limits:
              cpu: 0.2
              memory: "10Mi"
          livenessProbe:
            httpGet:
              path: /healthz
              port: 81
              scheme: HTTP
            initialDelaySeconds: 5
            periodSeconds: 15
            timeoutSeconds: 5
          readinessProbe:
            httpGet:
              path: /readiness
              port: 81
              scheme: HTTP
            initialDelaySeconds: 5
            timeoutSeconds: 1
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: frontend
spec:
  replicas: 1
  selector:
    matchLabels:
      app: frontend
      track: stable
  template:
    metadata:
      labels:
        app: frontend
        track: stable
    spec:
      containers:
        - name: nginx
          image: "nginx:1.9.14"
          lifecycle:
            preStop:
              exec:
                command: ["/usr/sbin/nginx","-s","quit"]
          volumeMounts:
            - name: "nginx-frontend-conf"
              mountPath: "/etc/nginx/conf.d"
            - name: "tls-certs"
              mountPath: "/etc/tls"
      volumes:
        - name: "tls-certs"
          secret:
            secretName: "tls-certs"
        - name: "nginx-frontend-conf"
          configMap:
            name: "nginx-frontend-conf"
            items:
              - key: "frontend.conf"
                path: "frontend.conf"
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: hello-canary
spec:
  replicas: 1
  selector:
    matchLabels:
      app: hello
      track: canary
      version: 2.0.0
  template:
    metadata:
      labels:
        app: hello
        track: canary
        version: 2.0.0
    spec:
      containers:
        - name: hello
          image: kelseyhightower/hello:2.0.0
          ports:
            - name: http
              containerPort: 80
            - name: health
              containerPort: 81
          resources:
            limits:
              cpu: 0.2
              memory: 10Mi
          livenessProbe:
            httpGet:
              path: /healthz
              port: 81
              scheme: HTTP
            initialDelaySeconds: 5
            periodSeconds: 15
            timeoutSeconds: 5
          readinessProbe:
            httpGet:
              path: /readiness
              port: 81
              scheme: HTTP
            initialDelaySeconds: 5
            timeoutSeconds: 1
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: hello-green
spec:
  replicas: 3
  selector:
    matchLabels:
      app: hello
      track: stable
      version: 2.0.0
  template:
    metadata:
      labels:
        app: hello
        track: stable
        version: 2.0.0
    spec:
      containers:
        - name: hello
          image: kelseyhightower/hello:2.0.0
          ports:
            - name: http
              containerPort: 80
            - name: health
              containerPort: 81
          resources:
            limits:
              cpu: 0.2
              memory: 10Mi
          livenessProbe:
            httpGet:
              path: /healthz
              port: 81
              scheme: HTTP
            initialDelaySeconds: 5
            periodSeconds: 15
            timeoutSeconds: 5
          readinessProbe:
            httpGet:
              path: /readiness
              port: 81
              scheme: HTTP
            initialDelaySeconds: 5
            timeoutSeconds: 1
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: hello
spec:
  replicas: 3
  selector:
    matchLabels:
      app: hello
      track: stable
      version: 1.0.0
  template:
    metadata:
      labels:
        app: hello
        track: stable
        version: 1.0.0
    spec:
      containers:
        - name: hello
          image: "kelseyhightower/hello:1.0.0"
          ports:
            - name: http
              containerPort: 80
            - name: health
              containerPort: 81
          resources:
            limits:
              cpu: 0.2
              memory: "10Mi"
          livenessProbe:
            httpGet:
              path: /healthz
              port: 81
              scheme: HTTP
            initialDelaySeconds: 5
            periodSeconds: 15
            timeoutSeconds: 5
          readinessProbe:
            httpGet:
              path: /readiness
              port: 81
              scheme: HTTP
            initialDelaySeconds: 5
            timeoutSeconds: 1
...

[nitinvinayak]

Use this repo https://github.com/DhruvSondhi/orchestrate-with-kubernetes for git clone statement, it will solve the issue you are facing and you will be able to complete the lab. I was having the same trouble, I found the fix in one of the open issue pull request.

git clone https://github.com/DhruvSondhi/orchestrate-with-kubernetes