Merge pull request #519 from yoguo/master

Fix the issue when getting the active nic

os_tests/libs/utils_lib.py

@@ -1964,7 +1964,7 @@ def collect_kmemleak(test_instance=None):
         test_instance.log.info('Memory leak found!')
 
 def get_active_nic(test_instance=None, rmt_node=None, vm=None):
-    cmd = "sudo ip link show|grep mtu|grep -v lo|awk -F':' '{print $2}'"
+    cmd = "sudo ip link show|grep mtu|grep -v lo|awk -F': ' '{print $2}'"
     output = run_cmd(test_instance, cmd, rmt_node=rmt_node, vm=vm)
     test_instance.active_nic  = "eth0"
     test_instance.log.info("Test which nic connects to public")
@@ -1973,7 +1973,7 @@ def get_active_nic(test_instance=None, rmt_node=None, vm=None):
         if len(net) < 3:
             continue
         cmd = "sudo ping {} -c 6 -I {}".format(test_instance.params.get('ping_server'), net)
-        ret = run_cmd(test_instance, cmd, rmt_node=rmt_node, vm=vm)
+        ret = run_cmd(test_instance, cmd, ret_status=True, rmt_node=rmt_node, vm=vm)
         if ret == 0:
             test_instance.active_nic  = net
             nic_found = True