legacy_test.go

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

     1  /*
     2  Copyright 2017 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 kuberuntime
    18  
    19  import (
    20  	"fmt"
    21  	"math/rand"
    22  	"path/filepath"
    23  	"testing"
    24  
    25  	"github.com/stretchr/testify/assert"
    26  )
    27  
    28  const letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
    29  
    30  func randStringBytes(n int) string {
    31  	b := make([]byte, n)
    32  	for i := range b {
    33  		b[i] = letterBytes[rand.Intn(len(letterBytes))]
    34  	}
    35  	return string(b)
    36  }
    37  
    38  func TestLogSymLink(t *testing.T) {
    39  	as := assert.New(t)
    40  	containerLogsDir := "/foo/bar"
    41  	podFullName := randStringBytes(128)
    42  	containerName := randStringBytes(70)
    43  	containerID := randStringBytes(80)
    44  	// The file name cannot exceed 255 characters. Since .log suffix is required, the prefix cannot exceed 251 characters.
    45  	expectedPath := filepath.Join(containerLogsDir, fmt.Sprintf("%s_%s-%s", podFullName, containerName, containerID)[:251]+".log")
    46  	as.Equal(expectedPath, logSymlink(containerLogsDir, podFullName, containerName, containerID))
    47  }
    48  
    49  func TestLegacyLogSymLink(t *testing.T) {
    50  	as := assert.New(t)
    51  	containerID := randStringBytes(80)
    52  	containerName := randStringBytes(70)
    53  	podName := randStringBytes(128)
    54  	podNamespace := randStringBytes(10)
    55  	// The file name cannot exceed 255 characters. Since .log suffix is required, the prefix cannot exceed 251 characters.
    56  	expectedPath := filepath.Join(legacyContainerLogsDir, fmt.Sprintf("%s_%s_%s-%s", podName, podNamespace, containerName, containerID)[:251]+".log")
    57  	as.Equal(expectedPath, legacyLogSymlink(containerID, containerName, podName, podNamespace))
    58  }
    59  
    60  func TestGetContainerIDFromLegacyLogSymLink(t *testing.T) {
    61  	containerID := randStringBytes(80)
    62  	containerName := randStringBytes(70)
    63  	podName := randStringBytes(128)
    64  	podNamespace := randStringBytes(10)
    65  
    66  	for _, test := range []struct {
    67  		name        string
    68  		logSymLink  string
    69  		expected    string
    70  		shouldError bool
    71  	}{
    72  		{
    73  			name:        "unable to find separator",
    74  			logSymLink:  "dummy.log",
    75  			expected:    "",
    76  			shouldError: true,
    77  		},
    78  		{
    79  			name:        "invalid suffix",
    80  			logSymLink:  filepath.Join(legacyContainerLogsDir, fmt.Sprintf("%s_%s_%s-%s", podName, podNamespace, containerName, containerID)[:251]+".invalidsuffix"),
    81  			expected:    "",
    82  			shouldError: true,
    83  		},
    84  		{
    85  			name:        "container ID too short",
    86  			logSymLink:  filepath.Join(legacyContainerLogsDir, fmt.Sprintf("%s_%s_%s-%s", podName, podNamespace, containerName, containerID[:5])+".log"),
    87  			expected:    "",
    88  			shouldError: true,
    89  		},
    90  		{
    91  			name:        "valid path",
    92  			logSymLink:  filepath.Join(legacyContainerLogsDir, fmt.Sprintf("%s_%s_%s-%s", podName, podNamespace, containerName, containerID)[:251]+".log"),
    93  			expected:    containerID[:40],
    94  			shouldError: false,
    95  		},
    96  	} {
    97  		t.Run(test.name, func(t *testing.T) {
    98  			containerID, err := getContainerIDFromLegacyLogSymlink(test.logSymLink)
    99  			if test.shouldError {
   100  				assert.Error(t, err)
   101  			} else {
   102  				assert.NoError(t, err)
   103  			}
   104  			assert.Equal(t, test.expected, containerID)
   105  		})
   106  	}
   107  }
   108
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