Bump example-dns-backend to python3

Signed-off-by: Davanum Srinivas <[email protected]>

Author: dims

staging/cluster-dns/dns-backend-rc.yaml

@@ -15,7 +15,7 @@ spec:
     spec:
       containers:
         - name: dns-backend
-          image: registry.k8s.io/example-dns-backend:v1
+          image: registry.k8s.io/example-dns-backend:v2
           ports:
             - name: backend-port
               containerPort: 8000

staging/cluster-dns/images/backend/Dockerfile

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM python:2.7-slim
+FROM python:3-slim
 
 COPY . /dns-backend
 WORKDIR /dns-backend

staging/cluster-dns/images/backend/Makefile

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-TAG = v1
+TAG = v2
 PREFIX = staging-k8s.gcr.io
 IMAGE = example-dns-backend