Include inode info in container summary

pkg/kubelet/server/stats/summary.go

@@ -164,12 +164,14 @@ func (sb *summaryBuilder) containerInfoV2FsStats(
 	cs.Logs = &stats.FsStats{
 		AvailableBytes: &sb.rootFsInfo.Available,
 		CapacityBytes:  &sb.rootFsInfo.Capacity,
+		InodesFree:     &sb.rootFsInfo.InodesFree,
 	}
 
 	// The container rootFs lives on the imageFs devices (which may not be the node root fs)
 	cs.Rootfs = &stats.FsStats{
 		AvailableBytes: &sb.imageFsInfo.Available,
 		CapacityBytes:  &sb.imageFsInfo.Capacity,
+		InodesFree:     &sb.imageFsInfo.InodesFree,
 	}
 	lcs, found := sb.latestContainerStats(info)
 	if !found {

pkg/kubelet/server/stats/summary_test.go

@@ -89,6 +89,14 @@ func TestBuildSummary(t *testing.T) {
 		cName10 = "c0" // ensure cName10 conflicts with cName02, but is in a different pod
 		cName20 = "c1" // ensure cName20 conflicts with cName01, but is in a different pod + namespace
 	)
+	const (
+		rootfsCapacity    = uint64(10000000)
+		rootfsAvailable   = uint64(5000000)
+		rootfsInodesFree  = uint64(1000)
+		imagefsCapacity   = uint64(20000000)
+		imagefsAvailable  = uint64(8000000)
+		imagefsInodesFree = uint64(2000)
+	)
 
 	prf0 := kubestats.PodReference{Name: pName0, Namespace: namespace0, UID: "UID" + pName0}
 	prf1 := kubestats.PodReference{Name: pName1, Namespace: namespace0, UID: "UID" + pName1}
@@ -110,8 +118,16 @@ func TestBuildSummary(t *testing.T) {
 		"/pod2-c0": summaryTestContainerInfo(seedPod2Container, pName2, namespace2, cName20),
 	}
 
-	rootfs := v2.FsInfo{}
-	imagefs := v2.FsInfo{}
+	rootfs := v2.FsInfo{
+		Capacity:   rootfsCapacity,
+		Available:  rootfsAvailable,
+		InodesFree: rootfsInodesFree,
+	}
+	imagefs := v2.FsInfo{
+		Capacity:   imagefsCapacity,
+		Available:  imagefsAvailable,
+		InodesFree: imagefsInodesFree,
+	}
 
 	// memory limit overrides for each container (used to test available bytes if a memory limit is known)
 	memoryLimitOverrides := map[string]uint64{
@@ -159,6 +175,8 @@ func TestBuildSummary(t *testing.T) {
 		assert.EqualValues(t, testTime(creationTime, seed).Unix(), sys.StartTime.Time.Unix(), name+".StartTime")
 		checkCPUStats(t, name, seed, sys.CPU)
 		checkMemoryStats(t, name, seed, info, sys.Memory)
+		checkFsStats(t, rootfsCapacity, rootfsAvailable, rootfsInodesFree, sys.Logs)
+		checkFsStats(t, imagefsCapacity, imagefsAvailable, imagefsInodesFree, sys.Rootfs)
 	}
 
 	assert.Equal(t, 3, len(summary.Pods))
@@ -350,6 +368,12 @@ func checkMemoryStats(t *testing.T, label string, seed int, info v2.ContainerInf
 	}
 }
 
+func checkFsStats(t *testing.T, capacity uint64, Available uint64, inodesFree uint64, fs *kubestats.FsStats) {
+	assert.EqualValues(t, capacity, *fs.CapacityBytes)
+	assert.EqualValues(t, Available, *fs.AvailableBytes)
+	assert.EqualValues(t, inodesFree, *fs.InodesFree)
+}
+
 func TestCustomMetrics(t *testing.T) {
 	spec := []v1.MetricSpec{
 		{