[PRD-2394] proceed FuelMenu if DNS resolve fails

Change-Id: I7312ce5b1a00ff8a991d4b1905387361b870b12f

fuelmenu/fuelmenu/common/network.py

@@ -24,7 +24,6 @@ def inSameSubnet(ip1, ip2, netmask_or_cidr):
         cidr2 = netaddr.IPNetwork("%s/%s" % (ip2, netmask_or_cidr))
         return cidr1 == cidr2
     except netaddr.AddrFormatError:
-        log.warning(traceback.format_exc())
         return False
 
 
@@ -33,7 +32,6 @@ def getCidr(ip, netmask):
         ipn = netaddr.IPNetwork("%s/%s" % (ip, netmask))
         return str(ipn.cidr)
     except netaddr.AddrFormatError:
-        log.warning(traceback.format_exc())
         return False
 
 
@@ -42,7 +40,6 @@ def getCidrSize(cidr):
         ipn = netaddr.IPNetwork(cidr)
         return ipn.size
     except netaddr.AddrFormatError:
-        log.warning(traceback.format_exc())
         return False
 
 
@@ -62,5 +59,4 @@ def getNetwork(ip, netmask, additionalip=None):
 
         return ipn_list
     except netaddr.AddrFormatError:
-        log.warning(traceback.format_exc())
         return False

fuelmenu/fuelmenu/modules/dnsandhostname.py

@@ -195,9 +195,18 @@ class dnsandhostname(urwid.WidgetWrap):
 
                 #Try to resolve with first address
                 if not self.checkDNS(DNS_UPSTREAM):
-                    errors.append("IP %s unable to resolve DNS hostname.")
+                    #Warn user that DNS resolution failed, but continue
+                    msg = "Unable to resolve %s.\n\n" % responses['TEST_DNS']\
+                          + "Possible causes for DNS failure include:\n"\
+                          + "* Invalid DNS server\n"\
+                          + "* Invalid gateway\n"\
+                          + "* Other networking issue\n\n"\
+                          + "Fuel Setup can save this configuration, but "\
+                          + "you may want to correct your settings."
+                    diag = dialog.display_dialog(self, TextLabel(msg),
+                                                 "DNS Failure Warning")
+                    self.parent.refreshScreen()
             except Exception, e:
-                errors.append(e)
                 errors.append("Not a valid IP address for External DNS: %s"
                               % responses["DNS_UPSTREAM"])