Improve "get_server" function in Kubernetes context

When a kubernetes context is returning the node info it is
assumed that the first port defined is the ssh port which may
not be the case. This patch will address this issue by looking
for a defined port 22.

JIRA: YARDSTICK-1301

Change-Id: I65dee1bcf62f21ebcaefeaa2666bb0ad53f3876c
Signed-off-by: John O Loughlin <john.oloughlin@intel.com>

1 files changed, 17 insertions, 8 deletions

diff --git a/yardstick/benchmark/contexts/kubernetes.py b/yardstick/benchmark/contexts/kubernetes.py
index 4ba9eee36..9feb00602 100644
--- a/yardstick/benchmark/contexts/kubernetes.py
+++ b/yardstick/benchmark/contexts/kubernetes.py
@@ -16,6 +16,8 @@ import paramiko
 
 from yardstick.benchmark.contexts.base import Context
 from yardstick.orchestrator import kubernetes
+from yardstick.common import constants
+from yardstick.common import exceptions
 from yardstick.common import kubernetes_utils as k8s_utils
 from yardstick.common import utils
 
@@ -156,19 +158,26 @@ class KubernetesContext(Context):
 
     def _get_server(self, name):
         service_name = '{}-service'.format(name)
-        service = k8s_utils.get_service_by_name(service_name).ports[0]
-
-        host = {
-            'name': service.name,
+        service = k8s_utils.get_service_by_name(service_name)
+        if not service:
+            raise exceptions.KubernetesServiceObjectNotDefined()
+
+        for sn_port in (sn_port for sn_port in service.ports
+                        if sn_port.port == constants.SSH_PORT):
+            node_port = sn_port.node_port
+            break
+        else:
+            raise exceptions.KubernetesSSHPortNotDefined()
+
+        return {
+            'name': name,
             'ip': self._get_node_ip(),
             'private_ip': k8s_utils.get_pod_by_name(name).status.pod_ip,
-            'ssh_port': service.node_port,
+            'ssh_port': node_port,
             'user': 'root',
-            'key_filename': self.key_path,
+            'key_filename': self.key_path
         }
 
-        return host
-
     def _get_node_ip(self):
         return k8s_utils.get_node_list().items[0].status.addresses[0].address