Cleanup duplicated code

Implement Detect method of socketBasedIsolationDetector using
DetectForSocket.

Signed-off-by: Vasiliy Ulyanov <[email protected]>

pkg/virt-handler/isolation/isolation.go

@@ -113,29 +113,13 @@ func (s *socketBasedIsolationDetector) Whitelist(controller []string) PodIsolati
 }
 
 func (s *socketBasedIsolationDetector) Detect(vm *v1.VirtualMachineInstance) (IsolationResult, error) {
-	var pid int
-	var slice string
-	var err error
-	var controller []string
-
 	// Look up the socket of the virt-launcher Pod which was created for that VM, and extract the PID from it
 	socket, err := cmdclient.FindSocketOnHost(vm)
 	if err != nil {
 		return nil, err
 	}
 
-	if pid, err = s.getPid(socket); err != nil {
-		log.Log.Object(vm).Reason(err).Errorf("Could not get owner Pid of socket %s", socket)
-		return nil, err
-	}
-
-	// Look up the cgroup slice based on the whitelisted controller
-	if controller, slice, err = s.getSlice(pid); err != nil {
-		log.Log.Object(vm).Reason(err).Errorf("Could not get cgroup slice for Pid %d", pid)
-		return nil, err
-	}
-
-	return NewIsolationResult(pid, slice, controller), nil
+	return s.DetectForSocket(vm, socket)
 }
 
 // standard golang libraries don't provide API to set runtime limits