common_test.go

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

     1  /*
     2  Copyright 2015 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 prober
    18  
    19  import (
    20  	"os"
    21  	"reflect"
    22  	"sync"
    23  
    24  	v1 "k8s.io/api/core/v1"
    25  	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
    26  	"k8s.io/client-go/kubernetes/fake"
    27  	"k8s.io/client-go/tools/record"
    28  	kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
    29  	kubepod "k8s.io/kubernetes/pkg/kubelet/pod"
    30  	"k8s.io/kubernetes/pkg/kubelet/prober/results"
    31  	"k8s.io/kubernetes/pkg/kubelet/status"
    32  	statustest "k8s.io/kubernetes/pkg/kubelet/status/testing"
    33  	kubeletutil "k8s.io/kubernetes/pkg/kubelet/util"
    34  	"k8s.io/kubernetes/pkg/probe"
    35  	"k8s.io/utils/exec"
    36  )
    37  
    38  const (
    39  	testContainerName = "cOnTaInEr_NaMe"
    40  	testPodUID        = "pOd_UiD"
    41  )
    42  
    43  var testContainerID = kubecontainer.ContainerID{Type: "test", ID: "cOnTaInEr_Id"}
    44  
    45  func getTestRunningStatus() v1.PodStatus {
    46  	return getTestRunningStatusWithStarted(true)
    47  }
    48  
    49  func getTestRunningStatusWithStarted(started bool) v1.PodStatus {
    50  	containerStatus := v1.ContainerStatus{
    51  		Name:        testContainerName,
    52  		ContainerID: testContainerID.String(),
    53  	}
    54  	containerStatus.State.Running = &v1.ContainerStateRunning{StartedAt: metav1.Now()}
    55  	containerStatus.Started = &started
    56  	podStatus := v1.PodStatus{
    57  		Phase:             v1.PodRunning,
    58  		ContainerStatuses: []v1.ContainerStatus{containerStatus},
    59  	}
    60  	return podStatus
    61  }
    62  
    63  func getTestPod() *v1.Pod {
    64  	container := v1.Container{
    65  		Name: testContainerName,
    66  	}
    67  	pod := v1.Pod{
    68  		Spec: v1.PodSpec{
    69  			Containers:    []v1.Container{container},
    70  			RestartPolicy: v1.RestartPolicyNever,
    71  		},
    72  	}
    73  	pod.Name = "testPod"
    74  	pod.UID = testPodUID
    75  	return &pod
    76  }
    77  
    78  func setTestProbe(pod *v1.Pod, probeType probeType, probeSpec v1.Probe) {
    79  	// All tests rely on the fake exec prober.
    80  	probeSpec.ProbeHandler = v1.ProbeHandler{
    81  		Exec: &v1.ExecAction{},
    82  	}
    83  
    84  	// Apply test defaults, overwridden for test speed.
    85  	defaults := map[string]int64{
    86  		"TimeoutSeconds":   1,
    87  		"PeriodSeconds":    1,
    88  		"SuccessThreshold": 1,
    89  		"FailureThreshold": 1,
    90  	}
    91  	for field, value := range defaults {
    92  		f := reflect.ValueOf(&probeSpec).Elem().FieldByName(field)
    93  		if f.Int() == 0 {
    94  			f.SetInt(value)
    95  		}
    96  	}
    97  
    98  	switch probeType {
    99  	case readiness:
   100  		pod.Spec.Containers[0].ReadinessProbe = &probeSpec
   101  	case liveness:
   102  		pod.Spec.Containers[0].LivenessProbe = &probeSpec
   103  	case startup:
   104  		pod.Spec.Containers[0].StartupProbe = &probeSpec
   105  	}
   106  }
   107  
   108  func newTestManager() *manager {
   109  	podManager := kubepod.NewBasicPodManager()
   110  	podStartupLatencyTracker := kubeletutil.NewPodStartupLatencyTracker()
   111  	// Add test pod to pod manager, so that status manager can get the pod from pod manager if needed.
   112  	podManager.AddPod(getTestPod())
   113  	testRootDir := ""
   114  	if tempDir, err := os.MkdirTemp("", "kubelet_test."); err != nil {
   115  		return nil
   116  	} else {
   117  		testRootDir = tempDir
   118  	}
   119  	m := NewManager(
   120  		status.NewManager(&fake.Clientset{}, podManager, &statustest.FakePodDeletionSafetyProvider{}, podStartupLatencyTracker, testRootDir),
   121  		results.NewManager(),
   122  		results.NewManager(),
   123  		results.NewManager(),
   124  		nil, // runner
   125  		&record.FakeRecorder{},
   126  	).(*manager)
   127  	// Don't actually execute probes.
   128  	m.prober.exec = fakeExecProber{probe.Success, nil}
   129  	return m
   130  }
   131  
   132  func newTestWorker(m *manager, probeType probeType, probeSpec v1.Probe) *worker {
   133  	pod := getTestPod()
   134  	setTestProbe(pod, probeType, probeSpec)
   135  	return newWorker(m, probeType, pod, pod.Spec.Containers[0])
   136  }
   137  
   138  type fakeExecProber struct {
   139  	result probe.Result
   140  	err    error
   141  }
   142  
   143  func (p fakeExecProber) Probe(c exec.Cmd) (probe.Result, string, error) {
   144  	return p.result, "", p.err
   145  }
   146  
   147  type syncExecProber struct {
   148  	sync.RWMutex
   149  	fakeExecProber
   150  }
   151  
   152  func (p *syncExecProber) set(result probe.Result, err error) {
   153  	p.Lock()
   154  	defer p.Unlock()
   155  	p.result = result
   156  	p.err = err
   157  }
   158  
   159  func (p *syncExecProber) Probe(cmd exec.Cmd) (probe.Result, string, error) {
   160  	p.RLock()
   161  	defer p.RUnlock()
   162  	return p.fakeExecProber.Probe(cmd)
   163  }
   164
View as plain text