update cadvisor godeps to v0.27.2

vendor/github.com/google/cadvisor/container/crio/handler.go

@@ -18,6 +18,7 @@ package crio
 import (
 	"fmt"
 	"path"
+	"path/filepath"
 	"strconv"
 	"strings"
 	"time"
@@ -142,6 +143,12 @@ func newCrioContainerHandler(
 	// get device ID from root, otherwise, it's going to error out as overlay
 	// mounts doesn't have fixed dev ids.
 	rootfsStorageDir = strings.TrimSuffix(rootfsStorageDir, "/merged")
+	switch storageDriver {
+	case overlayStorageDriver, overlay2StorageDriver:
+		// overlay and overlay2 driver are the same "overlay2" driver so treat
+		// them the same.
+		rootfsStorageDir = filepath.Join(rootfsStorageDir, "diff")
+	}
 
 	// TODO: extract object mother method
 	handler := &crioContainerHandler{

vendor/github.com/google/cadvisor/container/docker/handler.go

@@ -43,7 +43,8 @@ import (
 
 const (
 	// The read write layers exist here.
-	aufsRWLayer = "diff"
+	aufsRWLayer     = "diff"
+	overlay2RWLayer = "diff"
 
 	// Path to the directory where docker stores log files if the json logging driver is enabled.
 	pathToContainersDir = "containers"
@@ -195,8 +196,10 @@ func newDockerContainerHandler(
 	switch storageDriver {
 	case aufsStorageDriver:
 		rootfsStorageDir = path.Join(storageDir, string(aufsStorageDriver), aufsRWLayer, rwLayerID)
-	case overlayStorageDriver, overlay2StorageDriver:
+	case overlayStorageDriver:
 		rootfsStorageDir = path.Join(storageDir, string(storageDriver), rwLayerID)
+	case overlay2StorageDriver:
+		rootfsStorageDir = path.Join(storageDir, string(storageDriver), rwLayerID, overlay2RWLayer)
 	case zfsStorageDriver:
 		status, err := Status()
 		if err != nil {