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)

1 files changed, 35 insertions, 0 deletions

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)