Use hardcoded default NTP servers, don't remove default servers when …

…changing servers

XSConsoleConstants.py

@@ -1,2 +1,7 @@
 # Default NTP domains are <int>.[centos|xenserver].pool.ntp.org
-DEFAULT_NTP_DOMAINS = [".centos.pool.ntp.org", ".xenserver.pool.ntp.org"]
+CENTOS_NTP_POOL_DOMAIN = "centos.pool.ntp.org"
+DEFAULT_NTP_DOMAINS = [CENTOS_NTP_POOL_DOMAIN, "xenserver.pool.ntp.org"]
+
+NUM_DEFAULT_NTP_SERVERS = 4
+
+DEFAULT_NTP_SERVERS = ["%d.%s" % (i, CENTOS_NTP_POOL_DOMAIN) for i in range(NUM_DEFAULT_NTP_SERVERS)]

XSConsoleData.py

@@ -506,7 +506,7 @@ def UpdateFromNTPConf(self):
             self.data['ntp']['method'] = "Manual"
 
             servers = self.data['ntp']['servers']
-            if len(servers) == 4 and all(
+            if len(servers) == NUM_DEFAULT_NTP_SERVERS and all(
                 inDefaultNTPDomains(server)
                 for server in self.data['ntp']['servers']
             ):
@@ -590,10 +590,7 @@ def AddDHCPNTP(self):
     def ResetDefaultNTPServers(self):
         # Double-check authentication
         Auth.Inst().AssertAuthenticated()
-
-        Data.Inst().NTPServersSet(
-            ["%d%s" % (i, DEFAULT_NTP_DOMAINS[0]) for i in range(4)]
-        )
+        Data.Inst().NTPServersSet(DEFAULT_NTP_SERVERS)
 
     def GetDHClientInterfaces(self):
         try:

plugins-base/XSFeatureNTP.py

@@ -67,7 +67,7 @@ def CreateMANUALPane(self):
         data.UpdateFromNTPConf()
 
         servers = data.ntp.servers([])
-        if data.ntp.method("") == "Manual" and len(servers) > 0:
+        if len(servers) > 0:
             choiceDefs.append(
                 ChoiceDef(
                     Lang("Remove Server"), lambda: self.HandleManualChoice("REMOVE")
@@ -302,9 +302,6 @@ def HandleKeyADD(self, inKey):
                 IPUtils.AssertValidNetworkName(inputValues['name'])
 
                 data=Data.Inst()
-                if data.ntp.method("") == "Default":
-                    data.NTPServersSet([server for server in data.ntp.servers([]) if not inDefaultNTPDomains(server)])
-
                 data.RemoveDHCPNTP()
 
                 servers = data.ntp.servers([])