Update my_spawner.py -> add nodeslector

extraFiles/my_spawner.py

@@ -42,6 +42,11 @@ class MySpawner(KubeSpawner):
             'key': 'kubernetes.io/arch',
             'operator': 'In',
             'values': ["amd64"]
+            },
+            {
+            'key': 'kubernetes.io/hostname',
+            'operator': 'In',
+            'values': ["node-2-6.sdsc.optiputer.net", "node-2-7.sdsc.optiputer.net"]
             }
             ]