k8s: fix python3 compatibility issue for multi-region setup

Previously , the setup.py file was used for the kubernetes cluster setup across the multiple regions , which worked only for the python2 versions , this fix will make it compatible for the python3 versions as well

Release note : None

Author: shreyaskm623

cloud/kubernetes/multiregion/setup.py

@@ -6,7 +6,6 @@
 # included in the /LICENSE file.
 
 
-import distutils.spawn
 import json
 import os
 from subprocess import check_call,check_output
@@ -116,12 +115,12 @@
 for zone, context in contexts.items():
     external_ip = ''
     while True:
-        external_ip = check_output(['kubectl', 'get', 'svc', 'kube-dns-lb', '--namespace', 'kube-system', '--context', context, '--template', '{{range .status.loadBalancer.ingress}}{{.ip}}{{end}}'])
+        external_ip = check_output(['kubectl', 'get', 'svc', 'kube-dns-lb', '--namespace', 'kube-system', '--context', context, '--template', '{{range .status.loadBalancer.ingress}}{{.ip}}{{end}}']).decode('utf-8')
         if external_ip:
             break
-        print  'Waiting for DNS load balancer IP in %s...' % (zone)
+        print('Waiting for DNS load balancer IP in %s...' % (zone))
         sleep(10)
-    print 'DNS endpoint for zone %s: %s' % (zone, external_ip)
+    print('DNS endpoint for zone %s: %s' % (zone, external_ip))
     dns_ips[zone] = external_ip
 
 # Update each cluster's DNS configuration with an appropriate configmap. Note
@@ -175,7 +174,7 @@
     check_call(['kubectl', 'apply', '-f', yaml_file, '--namespace', zone, '--context', context])
 
 # Finally, initialize the cluster.
-print 'Sleeping 30 seconds before attempting to initialize cluster to give time for volumes to be created and pods started.'
+print('Sleeping 30 seconds before attempting to initialize cluster to give time for volumes to be created and pods started.')
 sleep(30)
 for zone, context in contexts.items():
     check_call(['kubectl', 'create', '-f', 'cluster-init-secure.yaml', '--namespace', zone, '--context', context])