kvm resiliency test: better handling when takeover fails.

slapos/resiliencytest/suites/kvm.py

@@ -163,6 +163,8 @@ def runTestSuite(server_url, key_file, cert_file,
 
     # Make the clone instance takeover the main instance
     logger.info('Replacing main instance by clone instance...')
+    for i in range(0, 10):
+      try:
         takeover(
             server_url=server_url,
             key_file=key_file,
@@ -173,6 +175,13 @@ def runTestSuite(server_url, key_file, cert_file,
             namebase=namebase,
             winner_instance_suffix=str(current_clone),
         )
+        break
+      except: # SSLError
+        traceback.print_exc()
+        if i is 9:
+          raise
+        logger.warning('takeover failed. Retrying...')
+        time.sleep(10)
     logger.info('Done.')
 
     # Wait for the new IP (of old-clone new-main instance) to appear.