container_gc_test.go

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

     1  /*
     2  Copyright 2023 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 container_test
    18  
    19  import (
    20  	"context"
    21  	"reflect"
    22  	"testing"
    23  
    24  	runtimeapi "k8s.io/cri-api/pkg/apis/runtime/v1"
    25  	. "k8s.io/kubernetes/pkg/kubelet/container"
    26  	ctest "k8s.io/kubernetes/pkg/kubelet/container/testing"
    27  )
    28  
    29  func TestIsContainerFsSeparateFromImageFs(t *testing.T) {
    30  	runtime := &ctest.FakeRuntime{}
    31  	fakeSources := ctest.NewFakeReadyProvider()
    32  
    33  	gcContainer, err := NewContainerGC(runtime, GCPolicy{}, fakeSources)
    34  	if err != nil {
    35  		t.Errorf("unexpected error")
    36  	}
    37  
    38  	cases := []struct {
    39  		name                          string
    40  		containerFs                   []*runtimeapi.FilesystemUsage
    41  		imageFs                       []*runtimeapi.FilesystemUsage
    42  		writeableSeparateFromReadOnly bool
    43  	}{
    44  		{
    45  			name:                          "Only images",
    46  			imageFs:                       []*runtimeapi.FilesystemUsage{{FsId: &runtimeapi.FilesystemIdentifier{Mountpoint: "image"}}},
    47  			writeableSeparateFromReadOnly: false,
    48  		},
    49  		{
    50  			name:                          "images and containers",
    51  			imageFs:                       []*runtimeapi.FilesystemUsage{{FsId: &runtimeapi.FilesystemIdentifier{Mountpoint: "image"}}},
    52  			containerFs:                   []*runtimeapi.FilesystemUsage{{FsId: &runtimeapi.FilesystemIdentifier{Mountpoint: "container"}}},
    53  			writeableSeparateFromReadOnly: true,
    54  		},
    55  		{
    56  			name:                          "same filesystem",
    57  			imageFs:                       []*runtimeapi.FilesystemUsage{{FsId: &runtimeapi.FilesystemIdentifier{Mountpoint: "image"}}},
    58  			containerFs:                   []*runtimeapi.FilesystemUsage{{FsId: &runtimeapi.FilesystemIdentifier{Mountpoint: "image"}}},
    59  			writeableSeparateFromReadOnly: false,
    60  		},
    61  
    62  		{
    63  			name:                          "Only containers",
    64  			containerFs:                   []*runtimeapi.FilesystemUsage{{FsId: &runtimeapi.FilesystemIdentifier{Mountpoint: "image"}}},
    65  			writeableSeparateFromReadOnly: false,
    66  		},
    67  		{
    68  			name:                          "neither are specified",
    69  			writeableSeparateFromReadOnly: false,
    70  		},
    71  		{
    72  			name:                          "both are empty arrays",
    73  			writeableSeparateFromReadOnly: false,
    74  			containerFs:                   []*runtimeapi.FilesystemUsage{},
    75  			imageFs:                       []*runtimeapi.FilesystemUsage{},
    76  		},
    77  		{
    78  			name:                          "FsId does not exist",
    79  			writeableSeparateFromReadOnly: false,
    80  			containerFs:                   []*runtimeapi.FilesystemUsage{{UsedBytes: &runtimeapi.UInt64Value{Value: 10}}},
    81  			imageFs:                       []*runtimeapi.FilesystemUsage{{UsedBytes: &runtimeapi.UInt64Value{Value: 10}}},
    82  		},
    83  	}
    84  
    85  	for _, tc := range cases {
    86  		runtime.SetContainerFsStats(tc.containerFs)
    87  		runtime.SetImageFsStats(tc.imageFs)
    88  		actualCommand := gcContainer.IsContainerFsSeparateFromImageFs(context.TODO())
    89  
    90  		if e, a := tc.writeableSeparateFromReadOnly, actualCommand; !reflect.DeepEqual(e, a) {
    91  			t.Errorf("%v: unexpected value; expected %v, got %v", tc.name, e, a)
    92  		}
    93  		runtime.SetContainerFsStats(nil)
    94  		runtime.SetImageFsStats(nil)
    95  	}
    96  }
    97
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