fix some typos

pkg/kubelet/errors.go

@@ -16,6 +16,12 @@ limitations under the License.
 
 package kubelet
 
+import "errors"
+
 const (
 	NetworkNotReadyErrorMsg = "network is not ready"
 )
+
+var (
+	ErrNetworkUnknown = errors.New("network state unknown")
+)

pkg/kubelet/kubelet.go

@@ -1563,9 +1563,9 @@ func (kl *Kubelet) syncPod(o syncPodOptions) error {
 	}
 
 	// If the network plugin is not ready, only start the pod if it uses the host network
-	if rs := kl.runtimeState.networkErrors(); len(rs) != 0 && !kubecontainer.IsHostNetworkPod(pod) {
-		kl.recorder.Eventf(pod, v1.EventTypeWarning, events.NetworkNotReady, "%s: %v", NetworkNotReadyErrorMsg, rs)
-		return fmt.Errorf("%s: %v", NetworkNotReadyErrorMsg, rs)
+	if err := kl.runtimeState.networkErrors(); err != nil && !kubecontainer.IsHostNetworkPod(pod) {
+		kl.recorder.Eventf(pod, v1.EventTypeWarning, events.NetworkNotReady, "%s: %v", NetworkNotReadyErrorMsg, err)
+		return fmt.Errorf("%s: %v", NetworkNotReadyErrorMsg, err)
 	}
 
 	// Create Cgroups for the pod and apply resource parameters
@@ -1820,8 +1820,8 @@ func (kl *Kubelet) syncLoop(updates <-chan kubetypes.PodUpdate, handler SyncHand
 	)
 	duration := base
 	for {
-		if rs := kl.runtimeState.runtimeErrors(); len(rs) != 0 {
-			klog.Infof("skipping pod synchronization - %v", rs)
+		if err := kl.runtimeState.runtimeErrors(); err != nil {
+			klog.Infof("skipping pod synchronization - %v", err)
 			// exponential backoff
 			time.Sleep(duration)
 			duration = time.Duration(math.Min(float64(max), factor*float64(duration)))

pkg/kubelet/nodestatus/BUILD

@@ -18,6 +18,7 @@ go_library(
         "//staging/src/k8s.io/api/core/v1:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/api/resource:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
+        "//staging/src/k8s.io/apimachinery/pkg/util/errors:go_default_library",
         "//staging/src/k8s.io/apimachinery/pkg/util/net:go_default_library",
         "//staging/src/k8s.io/apiserver/pkg/util/feature:go_default_library",
         "//staging/src/k8s.io/cloud-provider:go_default_library",

pkg/kubelet/nodestatus/setters.go

@@ -29,6 +29,7 @@ import (
 	"k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/resource"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/util/errors"
 	utilnet "k8s.io/apimachinery/pkg/util/net"
 	utilfeature "k8s.io/apiserver/pkg/util/feature"
 	cloudprovider "k8s.io/cloud-provider"
@@ -438,8 +439,8 @@ func GoRuntime() Setter {
 // ReadyCondition returns a Setter that updates the v1.NodeReady condition on the node.
 func ReadyCondition(
 	nowFunc func() time.Time, // typically Kubelet.clock.Now
-	runtimeErrorsFunc func() []string, // typically Kubelet.runtimeState.runtimeErrors
-	networkErrorsFunc func() []string, // typically Kubelet.runtimeState.networkErrors
+	runtimeErrorsFunc func() error, // typically Kubelet.runtimeState.runtimeErrors
+	networkErrorsFunc func() error, // typically Kubelet.runtimeState.networkErrors
 	appArmorValidateHostFunc func() error, // typically Kubelet.appArmorValidator.ValidateHost, might be nil depending on whether there was an appArmorValidator
 	cmStatusFunc func() cm.Status, // typically Kubelet.containerManager.Status
 	recordEventFunc func(eventType, event string), // typically Kubelet.recordNodeStatusEvent
@@ -456,7 +457,7 @@ func ReadyCondition(
 			Message:           "kubelet is posting ready status",
 			LastHeartbeatTime: currentTime,
 		}
-		rs := append(runtimeErrorsFunc(), networkErrorsFunc()...)
+		errs := []error{runtimeErrorsFunc(), networkErrorsFunc()}
 		requiredCapacities := []v1.ResourceName{v1.ResourceCPU, v1.ResourceMemory, v1.ResourcePods}
 		if utilfeature.DefaultFeatureGate.Enabled(features.LocalStorageCapacityIsolation) {
 			requiredCapacities = append(requiredCapacities, v1.ResourceEphemeralStorage)
@@ -468,14 +469,14 @@ func ReadyCondition(
 			}
 		}
 		if len(missingCapacities) > 0 {
-			rs = append(rs, fmt.Sprintf("Missing node capacity for resources: %s", strings.Join(missingCapacities, ", ")))
+			errs = append(errs, fmt.Errorf("Missing node capacity for resources: %s", strings.Join(missingCapacities, ", ")))
 		}
-		if len(rs) > 0 {
+		if aggregatedErr := errors.NewAggregate(errs); aggregatedErr != nil {
 			newNodeReadyCondition = v1.NodeCondition{
 				Type:              v1.NodeReady,
 				Status:            v1.ConditionFalse,
 				Reason:            "KubeletNotReady",
-				Message:           strings.Join(rs, ","),
+				Message:           aggregatedErr.Error(),
 				LastHeartbeatTime: currentTime,
 			}
 		}

pkg/kubelet/nodestatus/setters_test.go

@@ -17,6 +17,7 @@ limitations under the License.
 package nodestatus
 
 import (
+	"errors"
 	"fmt"
 	"net"
 	"sort"
@@ -890,8 +891,8 @@ func TestReadyCondition(t *testing.T) {
 	cases := []struct {
 		desc                     string
 		node                     *v1.Node
-		runtimeErrors            []string
-		networkErrors            []string
+		runtimeErrors            error
+		networkErrors            error
 		appArmorValidateHostFunc func() error
 		cmStatus                 cm.Status
 		expectConditions         []v1.NodeCondition
@@ -926,24 +927,12 @@ func TestReadyCondition(t *testing.T) {
 			},
 			expectConditions: []v1.NodeCondition{*makeReadyCondition(true, "kubelet is posting ready status. WARNING: foo", now, now)},
 		},
-		{
-			desc:             "new, not ready: runtime errors",
-			node:             withCapacity.DeepCopy(),
-			runtimeErrors:    []string{"foo", "bar"},
-			expectConditions: []v1.NodeCondition{*makeReadyCondition(false, "foo,bar", now, now)},
-		},
-		{
-			desc:             "new, not ready: network errors",
-			node:             withCapacity.DeepCopy(),
-			networkErrors:    []string{"foo", "bar"},
-			expectConditions: []v1.NodeCondition{*makeReadyCondition(false, "foo,bar", now, now)},
-		},
 		{
 			desc:             "new, not ready: runtime and network errors",
 			node:             withCapacity.DeepCopy(),
-			runtimeErrors:    []string{"runtime"},
-			networkErrors:    []string{"network"},
-			expectConditions: []v1.NodeCondition{*makeReadyCondition(false, "runtime,network", now, now)},
+			runtimeErrors:    errors.New("runtime"),
+			networkErrors:    errors.New("network"),
+			expectConditions: []v1.NodeCondition{*makeReadyCondition(false, "[runtime, network]", now, now)},
 		},
 		{
 			desc:             "new, not ready: missing capacities",
@@ -973,7 +962,7 @@ func TestReadyCondition(t *testing.T) {
 				node.Status.Conditions = []v1.NodeCondition{*makeReadyCondition(true, "", before, before)}
 				return node
 			}(),
-			runtimeErrors:    []string{"foo"},
+			runtimeErrors:    errors.New("foo"),
 			expectConditions: []v1.NodeCondition{*makeReadyCondition(false, "foo", now, now)},
 			expectEvents: []testEvent{
 				{
@@ -999,17 +988,17 @@ func TestReadyCondition(t *testing.T) {
 				node.Status.Conditions = []v1.NodeCondition{*makeReadyCondition(false, "", before, before)}
 				return node
 			}(),
-			runtimeErrors:    []string{"foo"},
+			runtimeErrors:    errors.New("foo"),
 			expectConditions: []v1.NodeCondition{*makeReadyCondition(false, "foo", before, now)},
 			expectEvents:     []testEvent{},
 		},
 	}
 	for _, tc := range cases {
 		t.Run(tc.desc, func(t *testing.T) {
-			runtimeErrorsFunc := func() []string {
+			runtimeErrorsFunc := func() error {
 				return tc.runtimeErrors
 			}
-			networkErrorsFunc := func() []string {
+			networkErrorsFunc := func() error {
 				return tc.networkErrors
 			}
 			cmStatusFunc := func() cm.Status {

pkg/kubelet/runtime.go

@@ -17,9 +17,12 @@ limitations under the License.
 package kubelet
 
 import (
+	"errors"
 	"fmt"
 	"sync"
 	"time"
+
+	utilerrors "k8s.io/apimachinery/pkg/util/errors"
 )
 
 type runtimeState struct {
@@ -70,32 +73,32 @@ func (s *runtimeState) podCIDR() string {
 	return s.cidr
 }
 
-func (s *runtimeState) runtimeErrors() []string {
+func (s *runtimeState) runtimeErrors() error {
 	s.RLock()
 	defer s.RUnlock()
-	var ret []string
+	errs := []error{}
 	if s.lastBaseRuntimeSync.IsZero() {
-		ret = append(ret, "container runtime status check may not have completed yet")
+		errs = append(errs, errors.New("container runtime status check may not have completed yet."))
 	} else if !s.lastBaseRuntimeSync.Add(s.baseRuntimeSyncThreshold).After(time.Now()) {
-		ret = append(ret, "container runtime is down")
+		errs = append(errs, errors.New("container runtime is down."))
 	}
 	for _, hc := range s.healthChecks {
 		if ok, err := hc.fn(); !ok {
-			ret = append(ret, fmt.Sprintf("%s is not healthy: %v", hc.name, err))
+			errs = append(errs, fmt.Errorf("%s is not healthy: %v.", hc.name, err))
 		}
 	}
 
-	return ret
+	return utilerrors.NewAggregate(errs)
 }
 
-func (s *runtimeState) networkErrors() []string {
+func (s *runtimeState) networkErrors() error {
 	s.RLock()
 	defer s.RUnlock()
-	var ret []string
+	errs := []error{}
 	if s.networkError != nil {
-		ret = append(ret, s.networkError.Error())
+		errs = append(errs, s.networkError)
 	}
-	return ret
+	return utilerrors.NewAggregate(errs)
 }
 
 func newRuntimeState(
@@ -104,6 +107,6 @@ func newRuntimeState(
 	return &runtimeState{
 		lastBaseRuntimeSync:      time.Time{},
 		baseRuntimeSyncThreshold: runtimeSyncThreshold,
-		networkError:             fmt.Errorf("network state unknown"),
+		networkError:             ErrNetworkUnknown,
 	}
 }

pkg/kubelet/volumemanager/reconciler/reconciler.go

@@ -89,7 +89,7 @@ type Reconciler interface {
 //   safely (prevents more than one operation from being triggered on the same
 //   volume)
 // mounter - mounter passed in from kubelet, passed down unmount path
-// volumePluginMrg - volume plugin manager passed from kubelet
+// volumePluginMgr - volume plugin manager passed from kubelet
 func NewReconciler(
 	kubeClient clientset.Interface,
 	controllerAttachDetachEnabled bool,