[TEST] Catch k8s connection exceptions

In two steps: ExposeCDSBlueprintprocessorNodePortStep and PnfSimulatorCnfRegisterStep we uses kubernetes Python library to
prepare environment or check the status of pod instantiation. If connection with k8s api gateway can't be established an
exception is raised and no test report is created.
Add try...except block to catch connection error and finish test gently

Issue-ID: TEST-336
Signed-off-by: Michal Jagiello <michal.jagiello@t-mobile.pl>
Change-Id: I1993bec4c886d77645e1a60e0f3d169abeb4e8bd

2 files changed, 56 insertions, 39 deletions

diff --git a/src/onaptests/steps/onboard/cds.py b/src/onaptests/steps/onboard/cds.py
index f137adb..3ef37f2 100644
--- a/src/onaptests/steps/onboard/cds.py
+++ b/src/onaptests/steps/onboard/cds.py
@@ -9,8 +9,10 @@ from kubernetes import client, config
 from onapsdk.cds import Blueprint, DataDictionarySet
 from onapsdk.cds.blueprint_processor import Blueprintprocessor
 from onapsdk.configuration import settings
+import urllib3
 
 from ..base import BaseStep
+from onaptests.utils.exceptions import OnapTestException
 
 
 class CDSBaseStep(BaseStep, ABC):
@@ -48,11 +50,15 @@ class ExposeCDSBlueprintprocessorNodePortStep(CDSBaseStep):
         super().execute()
         config.load_kube_config(settings.K8S_CONFIG)
         self.k8s_client = client.CoreV1Api()
-        self.k8s_client.patch_namespaced_service(
-            self.service_name,
-            settings.K8S_NAMESPACE,
-            {"spec": {"ports": [{"port": 8080, "nodePort": 30449}], "type": "NodePort"}}
-        )
+        try:
+            self.k8s_client.patch_namespaced_service(
+                self.service_name,
+                settings.K8S_NAMESPACE,
+                {"spec": {"ports": [{"port": 8080, "nodePort": 30449}], "type": "NodePort"}}
+            )
+        except urllib3.exceptions.HTTPError:
+            self._logger.exception("Can't connect with k8s")
+            raise OnapTestException
 
     def cleanup(self) -> None:
         """Step cleanup.
@@ -60,22 +66,26 @@ class ExposeCDSBlueprintprocessorNodePortStep(CDSBaseStep):
         Restore CDS blueprintprocessor service.
 
         """
-        self.k8s_client.patch_namespaced_service(
-            self.service_name,
-            settings.K8S_NAMESPACE,
-            [
-                {
-                    "op": "remove",
-                    "path": "/spec/ports/0/nodePort"
-                },
-                {
-                    "op": "replace",
-                    "path": "/spec/type",
-                    "value": "ClusterIP"
-                }
-            ]
-        )
-        return super().cleanup()
+        try:
+            self.k8s_client.patch_namespaced_service(
+                self.service_name,
+                settings.K8S_NAMESPACE,
+                [
+                    {
+                        "op": "remove",
+                        "path": "/spec/ports/0/nodePort"
+                    },
+                    {
+                        "op": "replace",
+                        "path": "/spec/type",
+                        "value": "ClusterIP"
+                    }
+                ]
+            )
+            return super().cleanup()
+        except urllib3.exceptions.HTTPError:
+            self._logger.exception("Can't connect with k8s")
+            raise OnapTestException
 
 
 class BootstrapBlueprintprocessor(CDSBaseStep):
diff --git a/src/onaptests/steps/simulator/pnf_simulator_cnf/pnf_register.py b/src/onaptests/steps/simulator/pnf_simulator_cnf/pnf_register.py
index c1d76b0..77c6222 100644
--- a/src/onaptests/steps/simulator/pnf_simulator_cnf/pnf_register.py
+++ b/src/onaptests/steps/simulator/pnf_simulator_cnf/pnf_register.py
@@ -7,6 +7,7 @@ from typing import Tuple
 import requests
 from kubernetes import client, config, watch
 from onapsdk.configuration import settings
+import urllib3
 
 from onaptests.steps.base import BaseStep
 from onaptests.steps.instantiate.msb_k8s import CreateInstanceStep
@@ -35,8 +36,7 @@ class PnfSimulatorCnfRegisterStep(BaseStep):
         """Component name."""
         return "Environment"
 
-    @staticmethod
-    def is_pnf_pod_running(timeout_seconds=120) -> bool:
+    def is_pnf_pod_running(self, timeout_seconds=120) -> bool:
         """Check if PNF simulator pod is running.
 
         Args:
@@ -49,18 +49,21 @@ class PnfSimulatorCnfRegisterStep(BaseStep):
         config.load_kube_config(settings.K8S_CONFIG)
         k8s_client: "CoreV1API" = client.CoreV1Api()
         k8s_watch: "Watch" =  watch.Watch()
-        for event in k8s_watch.stream(k8s_client.list_namespaced_pod,
-                                      namespace=settings.K8S_NAMESPACE,
-                                      timeout_seconds=timeout_seconds):
-            if event["object"].metadata.name == "pnf-simulator":
-                if not event["object"].status.phase in ["Pending", "Running"]:
-                    # Invalid pod state
-                    return False
-                return event["object"].status.phase == "Running"
-        return False
-
-    @staticmethod
-    def get_ves_ip_and_port() -> Tuple[str, str]:
+        try:
+            for event in k8s_watch.stream(k8s_client.list_namespaced_pod,
+                                        namespace=settings.K8S_NAMESPACE,
+                                        timeout_seconds=timeout_seconds):
+                if event["object"].metadata.name == "pnf-simulator":
+                    if not event["object"].status.phase in ["Pending", "Running"]:
+                        # Invalid pod state
+                        return False
+                    return event["object"].status.phase == "Running"
+            return False
+        except urllib3.exceptions.HTTPError:
+            self._logger.error("Can't connect with k8s")
+            raise OnapTestException
+
+    def get_ves_ip_and_port(self) -> Tuple[str, str]:
         """Static method to get VES ip address and port.
 
         Raises:
@@ -72,10 +75,14 @@ class PnfSimulatorCnfRegisterStep(BaseStep):
         """
         config.load_kube_config(settings.K8S_CONFIG)
         k8s_client: "CoreV1API" = client.CoreV1Api()
-        for service in k8s_client.list_namespaced_service(namespace=settings.K8S_NAMESPACE).items:
-            if service.metadata.name == settings.DCAE_VES_COLLECTOR_POD_NAME:
-                return service.spec.cluster_ip, service.spec.ports[0].port
-        raise EnvironmentPreparationException("Couldn't get VES ip and port")
+        try:
+            for service in k8s_client.list_namespaced_service(namespace=settings.K8S_NAMESPACE).items:
+                if service.metadata.name == settings.DCAE_VES_COLLECTOR_POD_NAME:
+                    return service.spec.cluster_ip, service.spec.ports[0].port
+            raise EnvironmentPreparationException("Couldn't get VES ip and port")
+        except urllib3.exceptions.HTTPError:
+            self._logger.error("Can't connect with k8s")
+            raise OnapTestException
 
     @BaseStep.store_state
     def execute(self) -> None: