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Merge pull request #91885 from iamchuckss/test-throttling-image-service

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Add test coverage for throttledImageService
This commit is contained in:
Kubernetes Prow Robot 2020-06-10 17:14:08 -07:00 committed by GitHub
commit 983395fb85
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1 changed files with 98 additions and 41 deletions
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139
pkg/kubelet/images/image_manager_test.go
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@ -37,29 +37,38 @@ type pullerExpects struct {
}
type pullerTestCase struct {
testName string
containerImage string
policy v1.PullPolicy
inspectErr error
pullerErr error
qps float32
burst int
expected []pullerExpects
}
func pullerTestCases() []pullerTestCase {
return []pullerTestCase{
{ // pull missing image
testName: "image missing, pull",
containerImage: "missing_image",
policy: v1.PullIfNotPresent,
inspectErr: nil,
pullerErr: nil,
qps: 0.0,
burst: 0,
expected: []pullerExpects{
{[]string{"GetImageRef", "PullImage"}, nil},
}},
{ // image present, don't pull
testName: "image present, don't pull ",
containerImage: "present_image",
policy: v1.PullIfNotPresent,
inspectErr: nil,
pullerErr: nil,
qps: 0.0,
burst: 0,
expected: []pullerExpects{
{[]string{"GetImageRef"}, nil},
{[]string{"GetImageRef"}, nil},
@ -67,9 +76,12 @@ func pullerTestCases() []pullerTestCase {
}},
// image present, pull it
{containerImage: "present_image",
testName: "image present, pull ",
policy: v1.PullAlways,
inspectErr: nil,
pullerErr: nil,
qps: 0.0,
burst: 0,
expected: []pullerExpects{
{[]string{"GetImageRef", "PullImage"}, nil},
{[]string{"GetImageRef", "PullImage"}, nil},
@ -77,9 +89,12 @@ func pullerTestCases() []pullerTestCase {
}},
// missing image, error PullNever
{containerImage: "missing_image",
testName: "image missing, never pull",
policy: v1.PullNever,
inspectErr: nil,
pullerErr: nil,
qps: 0.0,
burst: 0,
expected: []pullerExpects{
{[]string{"GetImageRef"}, ErrImageNeverPull},
{[]string{"GetImageRef"}, ErrImageNeverPull},
@ -87,9 +102,12 @@ func pullerTestCases() []pullerTestCase {
}},
// missing image, unable to inspect
{containerImage: "missing_image",
testName: "image missing, pull if not present",
policy: v1.PullIfNotPresent,
inspectErr: errors.New("unknown inspectError"),
pullerErr: nil,
qps: 0.0,
burst: 0,
expected: []pullerExpects{
{[]string{"GetImageRef"}, ErrImageInspect},
{[]string{"GetImageRef"}, ErrImageInspect},
@ -97,9 +115,12 @@ func pullerTestCases() []pullerTestCase {
}},
// missing image, unable to fetch
{containerImage: "typo_image",
testName: "image missing, unable to fetch",
policy: v1.PullIfNotPresent,
inspectErr: nil,
pullerErr: errors.New("404"),
qps: 0.0,
burst: 0,
expected: []pullerExpects{
{[]string{"GetImageRef", "PullImage"}, ErrImagePull},
{[]string{"GetImageRef", "PullImage"}, ErrImagePull},
@ -108,6 +129,32 @@ func pullerTestCases() []pullerTestCase {
{[]string{"GetImageRef"}, ErrImagePullBackOff},
{[]string{"GetImageRef"}, ErrImagePullBackOff},
}},
// image present, non-zero qps, try to pull
{containerImage: "present_image",
testName: "image present and qps>0, pull",
policy: v1.PullAlways,
inspectErr: nil,
pullerErr: nil,
qps: 400.0,
burst: 600,
expected: []pullerExpects{
{[]string{"GetImageRef", "PullImage"}, nil},
{[]string{"GetImageRef", "PullImage"}, nil},
{[]string{"GetImageRef", "PullImage"}, nil},
}},
// image present, non-zero qps, try to pull when qps exceeded
{containerImage: "present_image",
testName: "image present and excessive qps rate, pull",
policy: v1.PullAlways,
inspectErr: nil,
pullerErr: nil,
qps: 2000.0,
burst: 0,
expected: []pullerExpects{
{[]string{"GetImageRef"}, ErrImagePull},
{[]string{"GetImageRef"}, ErrImagePull},
{[]string{"GetImageRef"}, ErrImagePullBackOff},
}},
}
}
@ -129,7 +176,7 @@ func pullerTestEnv(c pullerTestCase, serialized bool) (puller ImageManager, fake
fakeRuntime.Err = c.pullerErr
fakeRuntime.InspectErr = c.inspectErr
puller = NewImageManager(fakeRecorder, fakeRuntime, backOff, serialized, 0, 0)
puller = NewImageManager(fakeRecorder, fakeRuntime, backOff, serialized, c.qps, c.burst)
return
}
@ -146,16 +193,18 @@ func TestParallelPuller(t *testing.T) {
cases := pullerTestCases()
useSerializedEnv := false
for i, c := range cases {
for _, c := range cases {
puller, fakeClock, fakeRuntime, container := pullerTestEnv(c, useSerializedEnv)
for tick, expected := range c.expected {
fakeRuntime.CalledFunctions = nil
fakeClock.Step(time.Second)
_, _, err := puller.EnsureImageExists(pod, container, nil, nil)
assert.NoError(t, fakeRuntime.AssertCalls(expected.calls), "in test %d tick=%d", i, tick)
assert.Equal(t, expected.err, err, "in test %d tick=%d", i, tick)
}
t.Run(c.testName, func(t *testing.T) {
for _, expected := range c.expected {
fakeRuntime.CalledFunctions = nil
fakeClock.Step(time.Second)
_, _, err := puller.EnsureImageExists(pod, container, nil, nil)
assert.NoError(t, fakeRuntime.AssertCalls(expected.calls))
assert.Equal(t, expected.err, err)
}
})
}
}
@ -172,34 +221,39 @@ func TestSerializedPuller(t *testing.T) {
cases := pullerTestCases()
useSerializedEnv := true
for i, c := range cases {
for _, c := range cases {
puller, fakeClock, fakeRuntime, container := pullerTestEnv(c, useSerializedEnv)
for tick, expected := range c.expected {
fakeRuntime.CalledFunctions = nil
fakeClock.Step(time.Second)
_, _, err := puller.EnsureImageExists(pod, container, nil, nil)
assert.NoError(t, fakeRuntime.AssertCalls(expected.calls), "in test %d tick=%d", i, tick)
assert.Equal(t, expected.err, err, "in test %d tick=%d", i, tick)
}
t.Run(c.testName, func(t *testing.T) {
for _, expected := range c.expected {
fakeRuntime.CalledFunctions = nil
fakeClock.Step(time.Second)
_, _, err := puller.EnsureImageExists(pod, container, nil, nil)
assert.NoError(t, fakeRuntime.AssertCalls(expected.calls))
assert.Equal(t, expected.err, err)
}
})
}
}
func TestApplyDefaultImageTag(t *testing.T) {
for _, testCase := range []struct {
Input string
Output string
testName string
Input string
Output string
}{
{Input: "root", Output: "root:latest"},
{Input: "root:tag", Output: "root:tag"},
{Input: "root@sha256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855", Output: "root@sha256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"},
{testName: "root", Input: "root", Output: "root:latest"},
{testName: "root:tag", Input: "root:tag", Output: "root:tag"},
{testName: "root@sha", Input: "root@sha256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855", Output: "root@sha256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"},
} {
image, err := applyDefaultImageTag(testCase.Input)
if err != nil {
t.Errorf("applyDefaultImageTag(%s) failed: %v", testCase.Input, err)
} else if image != testCase.Output {
t.Errorf("Expected image reference: %q, got %q", testCase.Output, image)
}
t.Run(testCase.testName, func(t *testing.T) {
image, err := applyDefaultImageTag(testCase.Input)
if err != nil {
t.Errorf("applyDefaultImageTag(%s) failed: %v", testCase.Input, err)
} else if image != testCase.Output {
t.Errorf("Expected image reference: %q, got %q", testCase.Output, image)
}
})
}
}
@ -216,6 +270,7 @@ func TestPullAndListImageWithPodAnnotations(t *testing.T) {
},
}}
c := pullerTestCase{ // pull missing image
testName: "test pull and list image with pod annotations",
containerImage: "missing_image",
policy: v1.PullIfNotPresent,
inspectErr: nil,
@ -230,20 +285,22 @@ func TestPullAndListImageWithPodAnnotations(t *testing.T) {
fakeRuntime.ImageList = []Image{}
fakeClock.Step(time.Second)
_, _, err := puller.EnsureImageExists(pod, container, nil, nil)
assert.NoError(t, fakeRuntime.AssertCalls(c.expected[0].calls), "tick=%d", 0)
assert.Equal(t, c.expected[0].err, err, "tick=%d", 0)
t.Run(c.testName, func(t *testing.T) {
_, _, err := puller.EnsureImageExists(pod, container, nil, nil)
assert.NoError(t, fakeRuntime.AssertCalls(c.expected[0].calls), "tick=%d", 0)
assert.Equal(t, c.expected[0].err, err, "tick=%d", 0)
images, _ := fakeRuntime.ListImages()
assert.Equal(t, 1, len(images), "ListImages() count")
images, _ := fakeRuntime.ListImages()
assert.Equal(t, 1, len(images), "ListImages() count")
image := images[0]
assert.Equal(t, "missing_image:latest", image.ID, "Image ID")
image := images[0]
assert.Equal(t, "missing_image:latest", image.ID, "Image ID")
expectedAnnotations := []Annotation{
{
Name: "kubernetes.io/runtimehandler",
Value: "handler_name",
}}
assert.Equal(t, expectedAnnotations, image.Spec.Annotations, "image spec annotations")
expectedAnnotations := []Annotation{
{
Name: "kubernetes.io/runtimehandler",
Value: "handler_name",
}}
assert.Equal(t, expectedAnnotations, image.Spec.Annotations, "image spec annotations")
})
}