Provide support for air gapped env for rally

Sometimes, tested Kubernetes doesn't have direct access to Internet but
access through repository mirrors.
This patch handles this case for rally test case.

There's two ways for providing the repository mirrors:

- Give an environment variable (`MIRROR_REPO`) which gives a repository
  mirro with all needed images.
- Gives an environment variable per needed repo:
  - `DOCKERHUB_REPO` for DockerHub repository (`docker.io`)
  - `GCR_REPO` for Google Cloud repository (`gcr.io`)
  - `K8S_GCR_REPO` for Kubernetes repository (`k8s.gcr.io`)

Needed images list has also been extracted so Kubernetes administrator can
easily upload these images to the mirror if the mirror also doesn't have
access to Internet.

Signed-off-by: Sylvain Desbureaux <sylvain.desbureaux@orange.com>
Change-Id: I2ea6622b79f7e3c3c63c1441c4dab48e9bc4fb1a
(cherry picked from commit b26ac308d4d441195fcd804d4d0ff36356fa8a90)

2 files changed, 27 insertions, 21 deletions

diff --git a/functest_kubernetes/rally/all-in-one.yaml b/functest_kubernetes/rally/all-in-one.yaml
index 03d016ca..db30194e 100644
--- a/functest_kubernetes/rally/all-in-one.yaml
+++ b/functest_kubernetes/rally/all-in-one.yaml
@@ -22,7 +22,7 @@ subtasks:
   - title: Run a single workload with create/read/delete pod
     scenario:
       Kubernetes.create_and_delete_pod:
-        image: k8s.gcr.io/pause:3.3
+        image: {{ k8s_gcr_repo }}/pause:3.3
     runner:
       constant:
         concurrency: {{ concurrency }}
@@ -35,7 +35,7 @@ subtasks:
   - title: Run a single workload with create/read/delete replication controller
     scenario:
       Kubernetes.create_and_delete_replication_controller:
-        image: k8s.gcr.io/pause:3.3
+        image: {{ k8s_gcr_repo }}/pause:3.3
         replicas: 2
     runner:
       constant:
@@ -49,7 +49,7 @@ subtasks:
   - title: Run a single workload with create/scale/delete replication controller
     scenario:
       Kubernetes.create_scale_and_delete_replication_controller:
-        image: k8s.gcr.io/pause:3.3
+        image: {{ k8s_gcr_repo }}/pause:3.3
         replicas: 2
         scale_replicas: 3
     runner:
@@ -64,7 +64,7 @@ subtasks:
   - title: Run a single workload with create/read/delete replicaset
     scenario:
       Kubernetes.create_and_delete_replicaset:
-        image: k8s.gcr.io/pause:3.3
+        image: {{ k8s_gcr_repo }}/pause:3.3
         replicas: 1
     runner:
       constant:
@@ -78,7 +78,7 @@ subtasks:
   - title: Run a single workload with create/scale/delete replicaset
     scenario:
       Kubernetes.create_scale_and_delete_replicaset:
-        image: k8s.gcr.io/pause:3.3
+        image: {{ k8s_gcr_repo }}/pause:3.3
         replicas: 1
         scale_replicas: 2
     runner:
@@ -94,7 +94,7 @@ subtasks:
       Run a single workload with create/read/delete pod with emptyDir volume
     scenario:
       Kubernetes.create_and_delete_pod_with_emptydir_volume:
-        image: k8s.gcr.io/pause:3.3
+        image: {{ k8s_gcr_repo }}/pause:3.3
         mount_path: /opt/check
     runner:
       constant:
@@ -110,7 +110,7 @@ subtasks:
       volume
     scenario:
       Kubernetes.create_and_delete_pod_with_emptydir_volume:
-        image: busybox:1.28
+        image: {{ dockerhub_repo }}/busybox:1.28
         command:
           - sleep
           - "3600"
@@ -131,7 +131,7 @@ subtasks:
   - title: Run a single workload with create/read/delete pod with secret volume
     scenario:
       Kubernetes.create_and_delete_pod_with_secret_volume:
-        image: busybox:1.28
+        image: {{ dockerhub_repo }}/busybox:1.28
         command:
           - sleep
           - "3600"
@@ -148,7 +148,7 @@ subtasks:
   - title: Run a single workload with create/check/delete pod with secret volume
     scenario:
       Kubernetes.create_and_delete_pod_with_secret_volume:
-        image: busybox:1.28
+        image: {{ dockerhub_repo }}/busybox:1.28
         command:
           - sleep
           - "3600"
@@ -171,7 +171,7 @@ subtasks:
       volume
     scenario:
       Kubernetes.create_and_delete_pod_with_hostpath_volume:
-        image: busybox:1.28
+        image: {{ dockerhub_repo }}/busybox:1.28
         command:
           - sleep
           - "3600"
@@ -195,7 +195,7 @@ subtasks:
       Run a single workload with create/read/delete pod with configMap volume
     scenario:
       Kubernetes.create_and_delete_pod_with_configmap_volume:
-        image: busybox:1.28
+        image: {{ dockerhub_repo }}/busybox:1.28
         command:
           - "sleep"
           - "3600"
@@ -218,7 +218,7 @@ subtasks:
       volume
     scenario:
       Kubernetes.create_and_delete_pod_with_configmap_volume:
-        image: busybox:1.28
+        image: {{ dockerhub_repo }}/busybox:1.28
         command:
           - "sleep"
           - "3600"
@@ -243,7 +243,7 @@ subtasks:
   - title: Run a single workload with create/read/delete deployment
     scenario:
       Kubernetes.create_and_delete_deployment:
-        image: k8s.gcr.io/pause:3.3
+        image: {{ k8s_gcr_repo }}/pause:3.3
         replicas: 2
     runner:
       constant:
@@ -257,7 +257,7 @@ subtasks:
   - title: Run a single workload with create/rollout/delete deployment
     scenario:
       Kubernetes.create_rollout_and_delete_deployment:
-        image: busybox:1.28
+        image: {{ dockerhub_repo }}/busybox:1.28
         replicas: 1
         command:
           - sleep
@@ -281,7 +281,7 @@ subtasks:
   - title: Run a single workload with create/read/delete statefulset
     scenario:
       Kubernetes.create_and_delete_statefulset:
-        image: k8s.gcr.io/pause:3.3
+        image: {{ k8s_gcr_repo }}/pause:3.3
         replicas: 2
     runner:
       constant:
@@ -295,7 +295,7 @@ subtasks:
   - title: Run a single workload with create/scale/delete statefulset
     scenario:
       Kubernetes.create_scale_and_delete_statefulset:
-        image: k8s.gcr.io/pause:3.3
+        image: {{ k8s_gcr_repo }}/pause:3.3
         replicas: 1
         scale_replicas: 2
     runner:
@@ -310,7 +310,7 @@ subtasks:
   - title: Run a single workload with create/read/delete job
     scenario:
       Kubernetes.create_and_delete_job:
-        image: busybox:1.28
+        image: {{ dockerhub_repo }}/busybox:1.28
         command:
           - echo
           - "SUCCESS"
@@ -326,7 +326,7 @@ subtasks:
   - title: Run a single workload with create/check/delete clusterIP service
     scenario:
       Kubernetes.create_check_and_delete_pod_with_cluster_ip_service:
-        image: gcr.io/google-samples/hello-go-gke:1.0
+        image: {{ gcr_repo }}/google-samples/hello-go-gke:1.0
         port: 80
         protocol: TCP
     runner:
@@ -343,7 +343,7 @@ subtasks:
       custom endpoint
     scenario:
       Kubernetes.create_check_and_delete_pod_with_cluster_ip_service:
-        image: gcr.io/google-samples/hello-go-gke:1.0
+        image: {{ gcr_repo }}/google-samples/hello-go-gke:1.0
         port: 80
         protocol: TCP
         custom_endpoint: true
@@ -359,7 +359,7 @@ subtasks:
   - title: Run a single workload with create/check/delete NodePort service
     scenario:
       Kubernetes.create_check_and_delete_pod_with_node_port_service:
-        image: gcr.io/google-samples/hello-go-gke:1.0
+        image: {{ gcr_repo }}/google-samples/hello-go-gke:1.0
         port: 80
         protocol: TCP
         request_timeout: 10
diff --git a/functest_kubernetes/rally/rally_kubernetes.py b/functest_kubernetes/rally/rally_kubernetes.py
index fb20296e..f5d7e955 100644
--- a/functest_kubernetes/rally/rally_kubernetes.py
+++ b/functest_kubernetes/rally/rally_kubernetes.py
@@ -31,6 +31,9 @@ class RallyKubernetes(testcase.TestCase):
     concurrency = 1
     times = 1
     namespaces_count = 1
+    dockerhub_repo = os.getenv("MIRROR_REPO", "docker.io")
+    gcr_repo = os.getenv("MIRROR_REPO", "gcr.io")
+    k8s_gcr_repo = os.getenv("MIRROR_REPO", "k8s.gcr.io")
 
     def __init__(self, **kwargs):
         super(RallyKubernetes, self).__init__(**kwargs)
@@ -68,7 +71,10 @@ class RallyKubernetes(testcase.TestCase):
             concurrency=kwargs.get("concurrency", self.concurrency),
             times=kwargs.get("times", self.times),
             namespaces_count=kwargs.get(
-                "namespaces_count", self.namespaces_count)))
+                "namespaces_count", self.namespaces_count),
+            dockerhub_repo=os.getenv("DOCKERHUB_REPO", self.dockerhub_repo),
+            gcr_repo=os.getenv("GCR_REPO", self.gcr_repo),
+            k8s_gcr_repo=os.getenv("K8S_GCR_REPO", self.k8s_gcr_repo)))
         rapi.task.validate(deployment='my-kubernetes', config=task)
         task_instance = rapi.task.create(deployment='my-kubernetes')
         rapi.task.start(