Provide support for air gapped env for e2e

 Sometimes, tested Kubernetes doesn't have direct access to Internet but
 access through repository mirrors.
 This patch handles this case for e2e test case.

Signed-off-by: Sylvain Desbureaux <sylvain.desbureaux@orange.com>
Change-Id: Iaa2960ad03aae1fff859d41bcd6ddf3176658f8e
(cherry picked from commit 27dbb7c14bac45a9af8d18e1913a2be6815cea43)

2 files changed, 42 insertions, 1 deletions

diff --git a/README.md b/README.md
index 7dcf774d..bcd4f747 100644
--- a/README.md
+++ b/README.md
@@ -123,7 +123,7 @@ sudo docker run --env-file env \
 To test a Kubernetes without access to Internet, repository mirrors needs to be
 provided.
 
-Currently, only ims, rally and security tests supports this feature.
+Currently, all tests supports this feature except cnf conformance.
 
 There's two ways for providing the repository mirrors:
 
@@ -137,3 +137,9 @@ There's two ways for providing the repository mirrors:
 
 All needed images are given in
 [functest-kubernetes/ci/images.txt](functest-kubernetes/ci/images.txt)
+
+For e2e tests, `docker.io` is hardcoded. it does mean that you'll have to set up
+a mirror on docker. An example on how to set it up on docker daemon is provided
+here:
+[daemon-configuration-file](
+https://docs.docker.com/engine/reference/commandline/dockerd/#daemon-configuration-file)
diff --git a/functest_kubernetes/k8stest.py b/functest_kubernetes/k8stest.py
index 35649edc..bd1aed8a 100644
--- a/functest_kubernetes/k8stest.py
+++ b/functest_kubernetes/k8stest.py
@@ -19,6 +19,7 @@ import os
 import re
 import subprocess
 import time
+import yaml
 
 from xtesting.core import testcase
 
@@ -30,6 +31,8 @@ class E2ETesting(testcase.TestCase):
     __logger = logging.getLogger(__name__)
 
     config = '/root/.kube/config'
+    gcr_repo = os.getenv("MIRROR_REPO", "gcr.io")
+    k8s_gcr_repo = os.getenv("MIRROR_REPO", "k8s.gcr.io")
 
     def __init__(self, **kwargs):
         super(E2ETesting, self).__init__(**kwargs)
@@ -52,9 +55,11 @@ class E2ETesting(testcase.TestCase):
             cmd_line.extend(
                 ['-non-blocking-taints', os.environ["NON_BLOCKING_TAINTS"]])
         cmd_line.extend(['-disable-log-dump', 'true'])
+        self._generate_repo_list_file()
         self.__logger.info("Starting k8s test: '%s'.", cmd_line)
         env = os.environ.copy()
         env["GINKGO_PARALLEL"] = 'y'
+        env["KUBE_TEST_REPO_LIST"] = "{}/repositories.yml".format(self.res_dir)
         process = subprocess.Popen(cmd_line, stdout=subprocess.PIPE,
                                    stderr=subprocess.STDOUT, env=env)
         boutput = process.stdout.read()
@@ -84,6 +89,8 @@ class E2ETesting(testcase.TestCase):
                 self.__logger.error(grp2.group(1))
 
     def run(self, **kwargs):
+        if not os.path.exists(self.res_dir):
+            os.makedirs(self.res_dir)
         if not os.path.isfile(self.config):
             self.__logger.error(
                 "Cannot run k8s testcases. Config file not found")
@@ -97,3 +104,31 @@ class E2ETesting(testcase.TestCase):
             res = self.EX_RUN_ERROR
         self.stop_time = time.time()
         return res
+
+    def _generate_repo_list_file(self):
+        """Generate the repositories list for the test."""
+        # The list is taken from
+        # https://github.com/kubernetes/kubernetes/blob/master/test/utils/image/manifest.go
+        # It may needs update regularly
+        gcr_repo = os.getenv("GCR_REPO", self.gcr_repo)
+        k8s_gcr_repo = os.getenv("K8S_GCR_REPO", self.k8s_gcr_repo)
+        repo_list = {
+            "GcAuthenticatedRegistry": "{}/authenticated-image-pulling".format(
+                gcr_repo),
+            "E2eRegistry":             "{}/kubernetes-e2e-test-images".format(
+                gcr_repo),
+            "PromoterE2eRegistry":     "{}/e2e-test-images".format(
+                k8s_gcr_repo),
+            "BuildImageRegistry":      "{}/build-image".format(k8s_gcr_repo),
+            "InvalidRegistry":         "invalid.com/invalid",
+            "GcEtcdRegistry":          "{}".format(k8s_gcr_repo),
+            "GcRegistry":              "{}".format(k8s_gcr_repo),
+            "SigStorageRegistry":      "{}/sig-storage".format(k8s_gcr_repo),
+            "PrivateRegistry":         "{}/k8s-authenticated-test".format(
+                gcr_repo),
+            "SampleRegistry":          "{}/google-samples".format(gcr_repo),
+            "GcrReleaseRegistry":      "{}/gke-release".format(gcr_repo),
+            "MicrosoftRegistry":       "mcr.microsoft.com",
+        }
+        with open("{}/repositories.yml".format(self.res_dir), 'w') as file:
+            yaml.dump(repo_list, file)