CA-395582: Fix installation with multipath enabled

Commit 6495353 ("CA-392317: Make sure kernel is up to date using
Gdisk") added a check to ensure that issues with rereading the partition
table are detected. However, rereading the partition table always fails
when device-mapper is used (BLKRRPART returns EINVAL) which causes
spurious installation failures. The host installer correctly uses kpartx
to recreate partitions after repartitioning device-mapper devices so
simply ignore the warning from sgdisk when using device-mapper.

Signed-off-by: Ross Lagerwall <[email protected]>

disktools.py

@@ -1103,7 +1103,11 @@ def writeThisPartitionTable(self, table, dryrun=False, log=False):
         except:
             # Ignore error code which results from inconsistent initial state
             pass
-        self.gdiskCheck([self.SGDISK, '--mbrtogpt', '--clear', self.device])
+        args = [self.SGDISK, '--mbrtogpt', '--clear', self.device]
+        if isDeviceMapperNode(self.device):
+            self.cmdWrap(args)
+        else:
+            self.gdiskCheck(args)
 
         has_esp = False
         for part in table.values():
@@ -1141,7 +1145,10 @@ def writeThisPartitionTable(self, table, dryrun=False, log=False):
             if 'partuuid' in part:
                 args += ['--partition-guid=%d:%s' % (num,part['partuuid'])]
         args += [self.device]
-        self.gdiskCheck(args)
+        if isDeviceMapperNode(self.device):
+            self.cmdWrap(args)
+        else:
+            self.gdiskCheck(args)
 
         if isDeviceMapperNode(self.device):
             # Create partitions using device mapper