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Merge pull request #60208 from soltysh/remove_factory_metricsclient_method

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Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Remove factory metricsclient method

**What this PR does / why we need it**:
Alternative approach to https://github.com/kubernetes/kubernetes/pull/60142 which fixed the `NewCmdTopPod` return arguments

/assign @deads2k 

**Release note**:
```release-note
None
```
This commit is contained in:
Kubernetes Submit Queue 2018-02-22 22:45:58 -08:00 committed by GitHub
commit 4f083dee54
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
11 changed files with 146 additions and 135 deletions
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1
pkg/kubectl/cmd/testing/BUILD
View File

@ -40,7 +40,6 @@ go_library(
"//vendor/k8s.io/client-go/kubernetes:go_default_library",
"//vendor/k8s.io/client-go/rest:go_default_library",
"//vendor/k8s.io/client-go/rest/fake:go_default_library",
"//vendor/k8s.io/metrics/pkg/client/clientset_generated/clientset:go_default_library",
],
)

10
pkg/kubectl/cmd/testing/fake.go
View File

@ -49,7 +49,6 @@ import (
"k8s.io/kubernetes/pkg/kubectl/scheme"
"k8s.io/kubernetes/pkg/kubectl/validation"
"k8s.io/kubernetes/pkg/printers"
metricsclientset "k8s.io/metrics/pkg/client/clientset_generated/clientset"
)
// +k8s:deepcopy-gen=true
@ -245,7 +244,6 @@ type TestFactory struct {
Command string
TmpDir string
CategoryExpander categories.CategoryExpander
MetricsClientSet metricsclientset.Interface
ClientForMappingFunc func(mapping *meta.RESTMapping) (resource.RESTClient, error)
UnstructuredClientForMappingFunc func(mapping *meta.RESTMapping) (resource.RESTClient, error)
@ -299,10 +297,6 @@ func (f *FakeFactory) KubernetesClientSet() (*kubernetes.Clientset, error) {
return nil, nil
}
func (f *FakeFactory) MetricsClientSet() (metricsclientset.Interface, error) {
return f.tf.MetricsClientSet, f.tf.Err
}
func (f *FakeFactory) ClientSet() (internalclientset.Interface, error) {
return nil, nil
}
@ -548,10 +542,6 @@ func (f *fakeAPIFactory) KubernetesClientSet() (*kubernetes.Clientset, error) {
return clientset, f.tf.Err
}
func (f *fakeAPIFactory) MetricsClientSet() (metricsclientset.Interface, error) {
return f.tf.MetricsClientSet, f.tf.Err
}
func (f *fakeAPIFactory) ClientSet() (internalclientset.Interface, error) {
// Swap the HTTP client out of the REST client with the fake
// version.

1
pkg/kubectl/cmd/top.go
View File

@ -54,6 +54,7 @@ func NewCmdTop(f cmdutil.Factory, out, errOut io.Writer) *cobra.Command {
// create subcommands
cmd.AddCommand(NewCmdTopNode(f, nil, out))
cmd.AddCommand(NewCmdTopPod(f, nil, out))
return cmd
}

7
pkg/kubectl/cmd/top_node.go
View File

@ -131,7 +131,12 @@ func (o *TopNodeOptions) Complete(f cmdutil.Factory, cmd *cobra.Command, args []
}
o.DiscoveryClient = clientset.DiscoveryClient
o.MetricsClient, err = f.MetricsClientSet()
config, err := f.ClientConfig()
if err != nil {
return err
}
o.MetricsClient, err = metricsclientset.NewForConfig(config)
if err != nil {
return err
}

48
pkg/kubectl/cmd/top_node_test.go
View File

@ -303,13 +303,25 @@ func TestTopNodeAllMetricsFromMetricsServer(t *testing.T) {
fakemetricsClientset.AddReactor("list", "nodes", func(action core.Action) (handled bool, ret runtime.Object, err error) {
return true, expectedMetrics, nil
})
tf.MetricsClientSet = fakemetricsClientset
tf.Namespace = "test"
tf.ClientConfig = defaultClientConfig()
buf := bytes.NewBuffer([]byte{})
cmd := NewCmdTopNode(f, nil, buf)
cmd.Run(cmd, []string{})
// TODO in the long run, we want to test most of our commands like this. Wire the options struct with specific mocks
// TODO then check the particular Run functionality and harvest results from fake clients
cmdOptions := &TopNodeOptions{}
if err := cmdOptions.Complete(f, cmd, []string{}, buf); err != nil {
t.Fatal(err)
}
cmdOptions.MetricsClient = fakemetricsClientset
if err := cmdOptions.Validate(); err != nil {
t.Fatal(err)
}
if err := cmdOptions.RunTopNode(); err != nil {
t.Fatal(err)
}
// Check the presence of node names in the output.
result := buf.String()
@ -355,13 +367,25 @@ func TestTopNodeWithNameMetricsFromMetricsServer(t *testing.T) {
fakemetricsClientset.AddReactor("get", "nodes", func(action core.Action) (handled bool, ret runtime.Object, err error) {
return true, &expectedMetrics, nil
})
tf.MetricsClientSet = fakemetricsClientset
tf.Namespace = "test"
tf.ClientConfig = defaultClientConfig()
buf := bytes.NewBuffer([]byte{})
cmd := NewCmdTopNode(f, nil, buf)
cmd.Run(cmd, []string{expectedMetrics.Name})
// TODO in the long run, we want to test most of our commands like this. Wire the options struct with specific mocks
// TODO then check the particular Run functionality and harvest results from fake clients
cmdOptions := &TopNodeOptions{}
if err := cmdOptions.Complete(f, cmd, []string{expectedMetrics.Name}, buf); err != nil {
t.Fatal(err)
}
cmdOptions.MetricsClient = fakemetricsClientset
if err := cmdOptions.Validate(); err != nil {
t.Fatal(err)
}
if err := cmdOptions.RunTopNode(); err != nil {
t.Fatal(err)
}
// Check the presence of node names in the output.
result := buf.String()
@ -418,14 +442,26 @@ func TestTopNodeWithLabelSelectorMetricsFromMetricsServer(t *testing.T) {
fakemetricsClientset.AddReactor("list", "nodes", func(action core.Action) (handled bool, ret runtime.Object, err error) {
return true, expectedMetrics, nil
})
tf.MetricsClientSet = fakemetricsClientset
tf.Namespace = "test"
tf.ClientConfig = defaultClientConfig()
buf := bytes.NewBuffer([]byte{})
cmd := NewCmdTopNode(f, nil, buf)
cmd.Flags().Set("selector", label)
cmd.Run(cmd, []string{})
// TODO in the long run, we want to test most of our commands like this. Wire the options struct with specific mocks
// TODO then check the particular Run functionality and harvest results from fake clients
cmdOptions := &TopNodeOptions{}
if err := cmdOptions.Complete(f, cmd, []string{}, buf); err != nil {
t.Fatal(err)
}
cmdOptions.MetricsClient = fakemetricsClientset
if err := cmdOptions.Validate(); err != nil {
t.Fatal(err)
}
if err := cmdOptions.RunTopNode(); err != nil {
t.Fatal(err)
}
// Check the presence of node names in the output.
result := buf.String()

6
pkg/kubectl/cmd/top_pod.go
View File

@ -127,7 +127,11 @@ func (o *TopPodOptions) Complete(f cmdutil.Factory, cmd *cobra.Command, args []s
}
o.DiscoveryClient = clientset.DiscoveryClient
o.MetricsClient, err = f.MetricsClientSet()
config, err := f.ClientConfig()
if err != nil {
return err
}
o.MetricsClient, err = metricsclientset.NewForConfig(config)
if err != nil {
return err
}

169
pkg/kubectl/cmd/top_pod_test.go
View File

@ -226,7 +226,7 @@ func TestTopPodWithMetricsServer(t *testing.T) {
testCases := []struct {
name string
namespace string
flags map[string]string
options *TopPodOptions
args []string
expectedPath string
expectedQuery string
@ -236,7 +236,7 @@ func TestTopPodWithMetricsServer(t *testing.T) {
}{
{
name: "all namespaces",
flags: map[string]string{"all-namespaces": "true"},
options: &TopPodOptions{AllNamespaces: true},
expectedPath: topMetricsAPIPathPrefix + "/pods",
namespaces: []string{testNS, "secondtestns", "thirdtestns"},
listsNamespaces: true,
@ -254,14 +254,14 @@ func TestTopPodWithMetricsServer(t *testing.T) {
},
{
name: "pod with label selector",
flags: map[string]string{"selector": "key=value"},
options: &TopPodOptions{Selector: "key=value"},
expectedPath: topMetricsAPIPathPrefix + "/namespaces/" + testNS + "/pods",
expectedQuery: "labelSelector=" + url.QueryEscape("key=value"),
namespaces: []string{testNS, testNS},
},
{
name: "pod with container metrics",
flags: map[string]string{"containers": "true"},
options: &TopPodOptions{PrintContainers: true},
args: []string{"pod1"},
expectedPath: topMetricsAPIPathPrefix + "/namespaces/" + testNS + "/pods/pod1",
namespaces: []string{testNS},
@ -270,91 +270,106 @@ func TestTopPodWithMetricsServer(t *testing.T) {
}
initTestErrorHandler(t)
for _, testCase := range testCases {
t.Logf("Running test case: %s", testCase.name)
metricsList := testV1beta1PodMetricsData()
var expectedMetrics []metricsv1beta1api.PodMetrics
var expectedContainerNames, nonExpectedMetricsNames []string
for n, m := range metricsList {
if n < len(testCase.namespaces) {
m.Namespace = testCase.namespaces[n]
expectedMetrics = append(expectedMetrics, m)
for _, c := range m.Containers {
expectedContainerNames = append(expectedContainerNames, c.Name)
t.Run(testCase.name, func(t *testing.T) {
metricsList := testV1beta1PodMetricsData()
var expectedMetrics []metricsv1beta1api.PodMetrics
var expectedContainerNames, nonExpectedMetricsNames []string
for n, m := range metricsList {
if n < len(testCase.namespaces) {
m.Namespace = testCase.namespaces[n]
expectedMetrics = append(expectedMetrics, m)
for _, c := range m.Containers {
expectedContainerNames = append(expectedContainerNames, c.Name)
}
} else {
nonExpectedMetricsNames = append(nonExpectedMetricsNames, m.Name)
}
}
fakemetricsClientset := &metricsfake.Clientset{}
if len(expectedMetrics) == 1 {
fakemetricsClientset.AddReactor("get", "pods", func(action core.Action) (handled bool, ret runtime.Object, err error) {
return true, &expectedMetrics[0], nil
})
} else {
nonExpectedMetricsNames = append(nonExpectedMetricsNames, m.Name)
fakemetricsClientset.AddReactor("list", "pods", func(action core.Action) (handled bool, ret runtime.Object, err error) {
res := &metricsv1beta1api.PodMetricsList{
ListMeta: metav1.ListMeta{
ResourceVersion: "2",
},
Items: expectedMetrics,
}
return true, res, nil
})
}
}
fakemetricsClientset := &metricsfake.Clientset{}
f, tf := cmdtesting.NewAPIFactory()
ns := legacyscheme.Codecs
if len(expectedMetrics) == 1 {
fakemetricsClientset.AddReactor("get", "pods", func(action core.Action) (handled bool, ret runtime.Object, err error) {
return true, &expectedMetrics[0], nil
})
} else {
fakemetricsClientset.AddReactor("list", "pods", func(action core.Action) (handled bool, ret runtime.Object, err error) {
res := &metricsv1beta1api.PodMetricsList{
ListMeta: metav1.ListMeta{
ResourceVersion: "2",
},
Items: expectedMetrics,
}
return true, res, nil
})
}
tf.Client = &fake.RESTClient{
NegotiatedSerializer: ns,
Client: fake.CreateHTTPClient(func(req *http.Request) (*http.Response, error) {
switch p := req.URL.Path; {
case p == "/api":
return &http.Response{StatusCode: 200, Header: defaultHeader(), Body: ioutil.NopCloser(bytes.NewReader([]byte(apibody)))}, nil
case p == "/apis":
return &http.Response{StatusCode: 200, Header: defaultHeader(), Body: ioutil.NopCloser(bytes.NewReader([]byte(apisbodyWithMetrics)))}, nil
default:
t.Fatalf("%s: unexpected request: %#v\nGot URL: %#v",
testCase.name, req, req.URL)
return nil, nil
}
}),
}
tf.Namespace = testNS
tf.ClientConfig = defaultClientConfig()
buf := bytes.NewBuffer([]byte{})
f, tf := cmdtesting.NewAPIFactory()
ns := legacyscheme.Codecs
cmd := NewCmdTopPod(f, nil, buf)
var cmdOptions *TopPodOptions
if testCase.options != nil {
cmdOptions = testCase.options
} else {
cmdOptions = &TopPodOptions{}
}
tf.Client = &fake.RESTClient{
NegotiatedSerializer: ns,
Client: fake.CreateHTTPClient(func(req *http.Request) (*http.Response, error) {
switch p := req.URL.Path; {
case p == "/api":
return &http.Response{StatusCode: 200, Header: defaultHeader(), Body: ioutil.NopCloser(bytes.NewReader([]byte(apibody)))}, nil
case p == "/apis":
return &http.Response{StatusCode: 200, Header: defaultHeader(), Body: ioutil.NopCloser(bytes.NewReader([]byte(apisbodyWithMetrics)))}, nil
default:
t.Fatalf("%s: unexpected request: %#v\nGot URL: %#v",
testCase.name, req, req.URL)
return nil, nil
}
}),
}
tf.MetricsClientSet = fakemetricsClientset
tf.Namespace = testNS
tf.ClientConfig = defaultClientConfig()
buf := bytes.NewBuffer([]byte{})
// TODO in the long run, we want to test most of our commands like this. Wire the options struct with specific mocks
// TODO then check the particular Run functionality and harvest results from fake clients. We probably end up skipping the factory altogether.
if err := cmdOptions.Complete(f, cmd, testCase.args, buf); err != nil {
t.Fatal(err)
}
cmdOptions.MetricsClient = fakemetricsClientset
if err := cmdOptions.Validate(); err != nil {
t.Fatal(err)
}
if err := cmdOptions.RunTopPod(); err != nil {
t.Fatal(err)
}
cmd := NewCmdTopPod(f, nil, buf)
for name, value := range testCase.flags {
cmd.Flags().Set(name, value)
}
cmd.Run(cmd, testCase.args)
// Check the presence of pod names&namespaces/container names in the output.
result := buf.String()
if testCase.containers {
for _, containerName := range expectedContainerNames {
if !strings.Contains(result, containerName) {
t.Errorf("%s: missing metrics for container %s: \n%s", testCase.name, containerName, result)
// Check the presence of pod names&namespaces/container names in the output.
result := buf.String()
if testCase.containers {
for _, containerName := range expectedContainerNames {
if !strings.Contains(result, containerName) {
t.Errorf("missing metrics for container %s: \n%s", containerName, result)
}
}
}
}
for _, m := range expectedMetrics {
if !strings.Contains(result, m.Name) {
t.Errorf("%s: missing metrics for %s: \n%s", testCase.name, m.Name, result)
for _, m := range expectedMetrics {
if !strings.Contains(result, m.Name) {
t.Errorf("missing metrics for %s: \n%s", m.Name, result)
}
if testCase.listsNamespaces && !strings.Contains(result, m.Namespace) {
t.Errorf("missing metrics for %s/%s: \n%s", m.Namespace, m.Name, result)
}
}
if testCase.listsNamespaces && !strings.Contains(result, m.Namespace) {
t.Errorf("%s: missing metrics for %s/%s: \n%s", testCase.name, m.Namespace, m.Name, result)
for _, name := range nonExpectedMetricsNames {
if strings.Contains(result, name) {
t.Errorf("unexpected metrics for %s: \n%s", name, result)
}
}
}
for _, name := range nonExpectedMetricsNames {
if strings.Contains(result, name) {
t.Errorf("%s: unexpected metrics for %s: \n%s", testCase.name, name, result)
}
}
})
}
}

1
pkg/kubectl/cmd/util/BUILD
View File

@ -81,7 +81,6 @@ go_library(
"//vendor/k8s.io/client-go/scale:go_default_library",
"//vendor/k8s.io/client-go/tools/clientcmd:go_default_library",
"//vendor/k8s.io/client-go/util/homedir:go_default_library",
"//vendor/k8s.io/metrics/pkg/client/clientset_generated/clientset:go_default_library",
"//vendor/k8s.io/utils/exec:go_default_library",
],
)

29
pkg/kubectl/cmd/util/clientcache.go
View File

@ -27,7 +27,6 @@ import (
"k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
oldclient "k8s.io/kubernetes/pkg/client/unversioned"
"k8s.io/kubernetes/pkg/version"
metricsclientset "k8s.io/metrics/pkg/client/clientset_generated/clientset"
)
func NewClientCache(loader clientcmd.ClientConfig, discoveryClientFactory DiscoveryClientFactory) *ClientCache {
@ -59,7 +58,6 @@ type ClientCache struct {
discoveryClient discovery.DiscoveryInterface
kubernetesClientCache kubernetesClientCache
metricsClientCache metricsClientCache
}
// kubernetesClientCache creates a new kubernetes.Clientset one time
@ -73,17 +71,6 @@ type kubernetesClientCache struct {
err error
}
// metricsClientCache creates a new metricsclientset.Clientset one time
// and then returns the result for all future requests
type metricsClientCache struct {
// once makes sure the client is only initialized once
once sync.Once
// client is the cached client value
client *metricsclientset.Clientset
// err is the cached error value
err error
}
// KubernetesClientSetForVersion returns a new kubernetes.Clientset. It will cache the value
// the first time it is called and return the cached value on subsequent calls.
// If an error is encountered the first time KubernetesClientSetForVersion is called,
@ -100,22 +87,6 @@ func (c *ClientCache) KubernetesClientSetForVersion(requiredVersion *schema.Grou
return c.kubernetesClientCache.client, c.kubernetesClientCache.err
}
// MetricsClientSetForVersion returns a new kubernetes.Clientset. It will cache the value
// the first time it is called and return the cached value on subsequent calls.
// If an error is encountered the first time MetircsClientSetForVersion is called,
// the error will be cached.
func (c *ClientCache) MetricsClientSetForVersion(requiredVersion *schema.GroupVersion) (*metricsclientset.Clientset, error) {
c.metricsClientCache.once.Do(func() {
config, err := c.ClientConfigForVersion(requiredVersion)
if err != nil {
c.kubernetesClientCache.err = err
return
}
c.metricsClientCache.client, c.metricsClientCache.err = metricsclientset.NewForConfig(config)
})
return c.metricsClientCache.client, c.metricsClientCache.err
}
// also looks up the discovery client. We can't do this during init because the flags won't have been set
// because this is constructed pre-command execution before the command tree is
// even set up. Requires the lock to already be acquired

4
pkg/kubectl/cmd/util/factory.go
View File

@ -47,7 +47,6 @@ import (
"k8s.io/kubernetes/pkg/kubectl/resource"
"k8s.io/kubernetes/pkg/kubectl/validation"
"k8s.io/kubernetes/pkg/printers"
metricsclientset "k8s.io/metrics/pkg/client/clientset_generated/clientset"
)
const (
@ -95,9 +94,6 @@ type ClientAccessFactory interface {
// KubernetesClientSet gives you back an external clientset
KubernetesClientSet() (*kubernetes.Clientset, error)
// MetricsClientSet gives you back an external clientset for the metrics API
MetricsClientSet() (metricsclientset.Interface, error)
// Returns a RESTClient for accessing Kubernetes resources or an error.
RESTClient() (*restclient.RESTClient, error)
// Returns a client.Config for accessing the Kubernetes server.

5
pkg/kubectl/cmd/util/factory_client_access.go
View File

@ -31,7 +31,6 @@ import (
"time"
"k8s.io/api/core/v1"
metricsclientset "k8s.io/metrics/pkg/client/clientset_generated/clientset"
"github.com/spf13/cobra"
"github.com/spf13/pflag"
@ -200,10 +199,6 @@ func (f *ring0Factory) KubernetesClientSet() (*kubernetes.Clientset, error) {
return f.clientCache.KubernetesClientSetForVersion(nil)
}
func (f *ring0Factory) MetricsClientSet() (metricsclientset.Interface, error) {
return f.clientCache.MetricsClientSetForVersion(nil)
}
func (f *ring0Factory) ClientSet() (internalclientset.Interface, error) {
return f.clientCache.ClientSetForVersion(nil)
}