Clean up DockerLegacyService interface

Signed-off-by: Ciprian Hacman <ciprian@hakman.dev>

pkg/kubelet/kubelet.go

@@ -78,7 +78,6 @@ import (
 	"k8s.io/kubernetes/pkg/kubelet/images"
 	"k8s.io/kubernetes/pkg/kubelet/kubeletconfig"
 	"k8s.io/kubernetes/pkg/kubelet/kuberuntime"
-	"k8s.io/kubernetes/pkg/kubelet/legacy"
 	"k8s.io/kubernetes/pkg/kubelet/lifecycle"
 	"k8s.io/kubernetes/pkg/kubelet/logs"
 	"k8s.io/kubernetes/pkg/kubelet/metrics"
@@ -243,7 +242,6 @@ type Dependencies struct {
 	KubeletConfigController *kubeletconfig.Controller
 	RemoteRuntimeService    internalapi.RuntimeService
 	RemoteImageService      internalapi.ImageManagerService
-	dockerLegacyService     legacy.DockerLegacyService
 	// remove it after cadvisor.UsingLegacyCadvisorStats dropped.
 	useLegacyCadvisorStats bool
 }
@@ -608,7 +606,6 @@ func NewMainKubelet(kubeCfg *kubeletconfiginternal.KubeletConfiguration,
 
 	klet.resourceAnalyzer = serverstats.NewResourceAnalyzer(klet, kubeCfg.VolumeStatsAggPeriod.Duration, kubeDeps.Recorder)
 
-	klet.dockerLegacyService = kubeDeps.dockerLegacyService
 	klet.runtimeService = kubeDeps.RemoteRuntimeService
 
 	if kubeDeps.KubeClient != nil {
@@ -667,7 +664,6 @@ func NewMainKubelet(kubeCfg *kubeletconfiginternal.KubeletConfiguration,
 		kubeDeps.RemoteRuntimeService,
 		kubeDeps.RemoteImageService,
 		kubeDeps.ContainerManager.InternalContainerLifecycle(),
-		kubeDeps.dockerLegacyService,
 		klet.containerLogManager,
 		klet.runtimeClassManager,
 		seccompDefault,
@@ -1188,10 +1184,6 @@ type Kubelet struct {
 	// experimental behavior is desired.
 	experimentalHostUserNamespaceDefaulting bool
 
-	// dockerLegacyService contains some legacy methods for backward compatibility.
-	// It should be set only when docker is using non json-file logging driver.
-	dockerLegacyService legacy.DockerLegacyService
-
 	// StatsProvider provides the node and the container stats.
 	StatsProvider *stats.Provider
 

pkg/kubelet/kubelet_pods.go

@@ -1321,12 +1321,6 @@ func (kl *Kubelet) GetKubeletContainerLogs(ctx context.Context, podFullName, con
 		return err
 	}
 
-	if kl.dockerLegacyService != nil {
-		// dockerLegacyService should only be non-nil when we actually need it, so
-		// inject it into the runtimeService.
-		// TODO(random-liu): Remove this hack after deprecating unsupported log driver.
-		return kl.dockerLegacyService.GetContainerLogs(ctx, pod, containerID, logOptions, stdout, stderr)
-	}
 	return kl.containerRuntime.GetContainerLogs(ctx, pod, containerID, logOptions, stdout, stderr)
 }
 

pkg/kubelet/kuberuntime/kuberuntime_container.go

@@ -520,15 +520,7 @@ func (m *kubeGenericRuntimeManager) getPodContainerStatuses(uid kubetypes.UID, n
 				cStatus.ExitCode != 0 && cStatus.Reason != "ContainerCannotRun"
 			tMessage, checkLogs := getTerminationMessage(status, annotatedInfo.TerminationMessagePath, fallbackToLogs)
 			if checkLogs {
-				// if dockerLegacyService is populated, we're supposed to use it to fetch logs
-				if m.legacyLogProvider != nil {
-					tMessage, err = m.legacyLogProvider.GetContainerLogTail(uid, name, namespace, kubecontainer.ContainerID{Type: m.runtimeName, ID: c.Id})
-					if err != nil {
-						tMessage = fmt.Sprintf("Error reading termination message from logs: %v", err)
-					}
-				} else {
-					tMessage = m.readLastStringFromContainerLogs(status.GetLogPath())
-				}
+				tMessage = m.readLastStringFromContainerLogs(status.GetLogPath())
 			}
 			// Enrich the termination message written by the application is not empty
 			if len(tMessage) != 0 {

pkg/kubelet/kuberuntime/kuberuntime_manager.go

@@ -133,9 +133,6 @@ type kubeGenericRuntimeManager struct {
 	// Internal lifecycle event handlers for container resource management.
 	internalLifecycle cm.InternalContainerLifecycle
 
-	// A shim to legacy functions for backward compatibility.
-	legacyLogProvider LegacyLogProvider
-
 	// Manage container logs.
 	logManager logs.ContainerLogManager
 
@@ -168,12 +165,6 @@ type KubeGenericRuntime interface {
 	kubecontainer.CommandRunner
 }
 
-// LegacyLogProvider gives the ability to use unsupported docker log drivers (e.g. journald)
-type LegacyLogProvider interface {
-	// GetContainerLogTail gets the last few lines of the logs for a specific container.
-	GetContainerLogTail(uid kubetypes.UID, name, namespace string, containerID kubecontainer.ContainerID) (string, error)
-}
-
 // NewKubeGenericRuntimeManager creates a new kubeGenericRuntimeManager
 func NewKubeGenericRuntimeManager(
 	recorder record.EventRecorder,
@@ -197,7 +188,6 @@ func NewKubeGenericRuntimeManager(
 	runtimeService internalapi.RuntimeService,
 	imageService internalapi.ImageManagerService,
 	internalLifecycle cm.InternalContainerLifecycle,
-	legacyLogProvider LegacyLogProvider,
 	logManager logs.ContainerLogManager,
 	runtimeClassManager *runtimeclass.Manager,
 	seccompDefault bool,
@@ -219,7 +209,6 @@ func NewKubeGenericRuntimeManager(
 		runtimeService:         newInstrumentedRuntimeService(runtimeService),
 		imageService:           newInstrumentedImageManagerService(imageService),
 		internalLifecycle:      internalLifecycle,
-		legacyLogProvider:      legacyLogProvider,
 		logManager:             logManager,
 		runtimeClassManager:    runtimeClassManager,
 		logReduction:           logreduction.NewLogReduction(identicalErrorDelay),

pkg/kubelet/legacy/logs.go

@@ -1,42 +0,0 @@
-/*
-Copyright 2020 The Kubernetes Authors.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-package legacy
-
-import (
-	"context"
-	"io"
-
-	"k8s.io/api/core/v1"
-	kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
-	"k8s.io/kubernetes/pkg/kubelet/kuberuntime"
-)
-
-// DockerLegacyService interface is used throughout `pkg/kubelet`.
-// It used to live in the `pkg/kubelet/dockershim` package. While we
-// would eventually like to remove it entirely, we need to give users some form
-// of warning.
-type DockerLegacyService interface {
-	// GetContainerLogs gets logs for a specific container.
-	GetContainerLogs(context.Context, *v1.Pod, kubecontainer.ContainerID, *v1.PodLogOptions, io.Writer, io.Writer) error
-
-	// IsCRISupportedLogDriver checks whether the logging driver used by docker is
-	// supported by native CRI integration.
-	// TODO(resouer): remove this when deprecating unsupported log driver
-	IsCRISupportedLogDriver() (bool, error)
-
-	kuberuntime.LegacyLogProvider
-}