nodeshutdown_manager.go

Documentation: k8s.io/kubernetes/pkg/kubelet/nodeshutdown

     1  /*
     2  Copyright 2021 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package nodeshutdown
    18  
    19  import (
    20  	"time"
    21  
    22  	v1 "k8s.io/api/core/v1"
    23  	"k8s.io/client-go/tools/record"
    24  	"k8s.io/klog/v2"
    25  	kubeletconfig "k8s.io/kubernetes/pkg/kubelet/apis/config"
    26  	"k8s.io/kubernetes/pkg/kubelet/eviction"
    27  	"k8s.io/kubernetes/pkg/kubelet/lifecycle"
    28  	"k8s.io/kubernetes/pkg/kubelet/prober"
    29  	"k8s.io/utils/clock"
    30  )
    31  
    32  // Manager interface provides methods for Kubelet to manage node shutdown.
    33  type Manager interface {
    34  	Admit(attrs *lifecycle.PodAdmitAttributes) lifecycle.PodAdmitResult
    35  	Start() error
    36  	ShutdownStatus() error
    37  }
    38  
    39  // Config represents Manager configuration
    40  type Config struct {
    41  	Logger                           klog.Logger
    42  	ProbeManager                     prober.Manager
    43  	Recorder                         record.EventRecorder
    44  	NodeRef                          *v1.ObjectReference
    45  	GetPodsFunc                      eviction.ActivePodsFunc
    46  	KillPodFunc                      eviction.KillPodFunc
    47  	SyncNodeStatusFunc               func()
    48  	ShutdownGracePeriodRequested     time.Duration
    49  	ShutdownGracePeriodCriticalPods  time.Duration
    50  	ShutdownGracePeriodByPodPriority []kubeletconfig.ShutdownGracePeriodByPodPriority
    51  	StateDirectory                   string
    52  	Clock                            clock.Clock
    53  }
    54  
    55  // managerStub is a fake node shutdown managerImpl .
    56  type managerStub struct{}
    57  
    58  // Admit returns a fake Pod admission which always returns true
    59  func (managerStub) Admit(attrs *lifecycle.PodAdmitAttributes) lifecycle.PodAdmitResult {
    60  	return lifecycle.PodAdmitResult{Admit: true}
    61  }
    62  
    63  // Start is a no-op always returning nil for non linux platforms.
    64  func (managerStub) Start() error {
    65  	return nil
    66  }
    67  
    68  // ShutdownStatus is a no-op always returning nil for non linux platforms.
    69  func (managerStub) ShutdownStatus() error {
    70  	return nil
    71  }
    72
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