Fix OSError in postprocess

Wrong order of clearing LibvirtdDebugLogConfig causes OSError.

Signed-off-by: lcheng <[email protected]>

virttest/env_process.py

@@ -1041,13 +1041,13 @@ def preprocess(test, params, env):
     _setup_manager.register(CheckInstalledCMDs)
     _setup_manager.register(UlimitConfig)
     _setup_manager.register(NetworkProxies)
-    _setup_manager.register(LibvirtdDebugLogConfig)
     _setup_manager.register(BridgeConfig)
-    _setup_manager.register(StorageConfig)
     _setup_manager.register(FirewalldService)
     _setup_manager.register(IPSniffer)
+    _setup_manager.register(StorageConfig)
     _setup_manager.register(MigrationEnvSetup)
     _setup_manager.register(UnrequestedVMHandler)
+    _setup_manager.register(LibvirtdDebugLogConfig)
     _setup_manager.do_setup()
 
     vm_type = params.get("vm_type")

virttest/nfs.py

@@ -295,6 +295,9 @@ class NFSClient(object):
 
     def __init__(self, params):
         self.nfs_client_ip = params.get("nfs_client_ip")
+        # Create /root/.ssh/known_hosts file
+        cmd = "ssh-keyscan %s >> ~/.ssh/known_hosts" % params.get("nfs_server_ip")
+        process.run(cmd, shell=True, ignore_status=True)
         # To Avoid host key verification failure
         ret = process.run("ssh-keygen -R %s" % self.nfs_client_ip, ignore_status=True)
         stderr = ret.stderr_text