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Add external metrics client

pull/6/head
Beata Skiba 2018-02-21 15:55:02 +01:00 committed by Maciej Pytel
parent 8df7e8591e
commit 92adb069a3
7 changed files with 273 additions and 0 deletions
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2
hack/.golint_failures
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@ -730,6 +730,8 @@ staging/src/k8s.io/metrics/pkg/apis/metrics/v1alpha1
staging/src/k8s.io/metrics/pkg/apis/metrics/v1beta1
staging/src/k8s.io/metrics/pkg/client/custom_metrics
staging/src/k8s.io/metrics/pkg/client/custom_metrics/fake
staging/src/k8s.io/metrics/pkg/client/external_metrics
staging/src/k8s.io/metrics/pkg/client/external_metrics/fake
staging/src/k8s.io/sample-apiserver/pkg/apis/wardle
staging/src/k8s.io/sample-apiserver/pkg/apis/wardle/v1alpha1
staging/src/k8s.io/sample-apiserver/pkg/apiserver

1
staging/BUILD
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@ -215,6 +215,7 @@ filegroup(
"//staging/src/k8s.io/metrics/pkg/apis/metrics:all-srcs",
"//staging/src/k8s.io/metrics/pkg/client/clientset_generated/clientset:all-srcs",
"//staging/src/k8s.io/metrics/pkg/client/custom_metrics:all-srcs",
"//staging/src/k8s.io/metrics/pkg/client/external_metrics:all-srcs",
"//staging/src/k8s.io/sample-apiserver:all-srcs",
"//staging/src/k8s.io/sample-controller:all-srcs",
],

40
staging/src/k8s.io/metrics/pkg/client/external_metrics/BUILD Normal file
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@ -0,0 +1,40 @@
package(default_visibility = ["//visibility:public"])
load(
"@io_bazel_rules_go//go:def.bzl",
"go_library",
)
go_library(
name = "go_default_library",
srcs = [
"client.go",
"interfaces.go",
],
importpath = "k8s.io/metrics/pkg/client/external_metrics",
deps = [
"//vendor/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
"//vendor/k8s.io/apimachinery/pkg/labels:go_default_library",
"//vendor/k8s.io/apimachinery/pkg/runtime/serializer:go_default_library",
"//vendor/k8s.io/client-go/kubernetes/scheme:go_default_library",
"//vendor/k8s.io/client-go/rest:go_default_library",
"//vendor/k8s.io/client-go/util/flowcontrol:go_default_library",
"//vendor/k8s.io/metrics/pkg/apis/external_metrics/v1beta1:go_default_library",
],
)
filegroup(
name = "package-srcs",
srcs = glob(["**"]),
tags = ["automanaged"],
visibility = ["//visibility:private"],
)
filegroup(
name = "all-srcs",
srcs = [
":package-srcs",
"//staging/src/k8s.io/metrics/pkg/client/external_metrics/fake:all-srcs",
],
tags = ["automanaged"],
)

95
staging/src/k8s.io/metrics/pkg/client/external_metrics/client.go Normal file
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@ -0,0 +1,95 @@
/*
Copyright 2018 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package external_metrics
import (
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
serializer "k8s.io/apimachinery/pkg/runtime/serializer"
"k8s.io/client-go/kubernetes/scheme"
"k8s.io/client-go/rest"
"k8s.io/client-go/util/flowcontrol"
"k8s.io/metrics/pkg/apis/external_metrics/v1beta1"
)
type externalMetricsClient struct {
client rest.Interface
}
func New(client rest.Interface) ExternalMetricsClient {
return &externalMetricsClient{
client: client,
}
}
func NewForConfig(c *rest.Config) (ExternalMetricsClient, error) {
configShallowCopy := *c
if configShallowCopy.RateLimiter == nil && configShallowCopy.QPS > 0 {
configShallowCopy.RateLimiter = flowcontrol.NewTokenBucketRateLimiter(configShallowCopy.QPS, configShallowCopy.Burst)
}
configShallowCopy.APIPath = "/apis"
if configShallowCopy.UserAgent == "" {
configShallowCopy.UserAgent = rest.DefaultKubernetesUserAgent()
}
configShallowCopy.GroupVersion = &v1beta1.SchemeGroupVersion
configShallowCopy.NegotiatedSerializer = serializer.DirectCodecFactory{CodecFactory: scheme.Codecs}
client, err := rest.RESTClientFor(&configShallowCopy)
if err != nil {
return nil, err
}
return New(client), nil
}
func NewForConfigOrDie(c *rest.Config) ExternalMetricsClient {
client, err := NewForConfig(c)
if err != nil {
panic(err)
}
return client
}
func (c *externalMetricsClient) NamespacedMetrics(namespace string) MetricsInterface {
return &namespacedMetrics{
client: c,
namespace: namespace,
}
}
type namespacedMetrics struct {
client *externalMetricsClient
namespace string
}
func (m *namespacedMetrics) List(metricName string, metricSelector labels.Selector) (*v1beta1.ExternalMetricValueList, error) {
res := &v1beta1.ExternalMetricValueList{}
err := m.client.client.Get().
Namespace(m.namespace).
Resource(metricName).
VersionedParams(&metav1.ListOptions{
LabelSelector: metricSelector.String(),
}, metav1.ParameterCodec).
Do().
Into(res)
if err != nil {
return nil, err
}
return res, nil
}

33
staging/src/k8s.io/metrics/pkg/client/external_metrics/fake/BUILD Normal file
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@ -0,0 +1,33 @@
package(default_visibility = ["//visibility:public"])
load(
"@io_bazel_rules_go//go:def.bzl",
"go_library",
)
go_library(
name = "go_default_library",
srcs = ["fake_client.go"],
importpath = "k8s.io/metrics/pkg/client/external_metrics/fake",
deps = [
"//vendor/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
"//vendor/k8s.io/apimachinery/pkg/labels:go_default_library",
"//vendor/k8s.io/apimachinery/pkg/runtime/schema:go_default_library",
"//vendor/k8s.io/client-go/testing:go_default_library",
"//vendor/k8s.io/metrics/pkg/apis/external_metrics/v1beta1:go_default_library",
"//vendor/k8s.io/metrics/pkg/client/external_metrics:go_default_library",
],
)
filegroup(
name = "package-srcs",
srcs = glob(["**"]),
tags = ["automanaged"],
visibility = ["//visibility:private"],
)
filegroup(
name = "all-srcs",
srcs = [":package-srcs"],
tags = ["automanaged"],
)

62
staging/src/k8s.io/metrics/pkg/client/external_metrics/fake/fake_client.go Normal file
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@ -0,0 +1,62 @@
/*
Copyright 2017 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package fake
import (
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/client-go/testing"
"k8s.io/metrics/pkg/apis/external_metrics/v1beta1"
eclient "k8s.io/metrics/pkg/client/external_metrics"
)
type FakeExternalMetricsClient struct {
testing.Fake
}
func (c *FakeExternalMetricsClient) NamespacedMetrics(namespace string) eclient.MetricsInterface {
return &fakeNamespacedMetrics{
Fake: c,
ns: namespace,
}
}
type fakeNamespacedMetrics struct {
Fake *FakeExternalMetricsClient
ns string
}
func (m *fakeNamespacedMetrics) List(metricName string, metricSelector labels.Selector) (*v1beta1.ExternalMetricValueList, error) {
resource := schema.GroupResource{
Group: v1beta1.SchemeGroupVersion.Group,
Resource: metricName,
}
kind := schema.GroupKind{
Group: v1beta1.SchemeGroupVersion.Group,
Kind: "ExternalMetricValue",
}
action := testing.NewListAction(resource.WithVersion(""), kind.WithVersion(""), m.ns, metav1.ListOptions{LabelSelector: metricSelector.String()})
obj, err := m.Fake.
Invokes(action, &v1beta1.ExternalMetricValueList{})
if obj == nil {
return nil, err
}
return obj.(*v1beta1.ExternalMetricValueList), err
}

40
staging/src/k8s.io/metrics/pkg/client/external_metrics/interfaces.go Normal file
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@ -0,0 +1,40 @@
/*
Copyright 2018 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package external_metrics
import (
"k8s.io/apimachinery/pkg/labels"
"k8s.io/metrics/pkg/apis/external_metrics/v1beta1"
)
// ExternalMetricsClient is a client for fetching external metrics.
type ExternalMetricsClient interface {
NamespacedMetricsGetter
}
// NamespacedMetricsGetter provides access to an interface for fetching
// metrics in a particular namespace.
type NamespacedMetricsGetter interface {
NamespacedMetrics(namespace string) MetricsInterface
}
// MetricsInterface provides access to external metrics.
type MetricsInterface interface {
// Get fetches the metric for the given namespace that maches the given
// metricSelector.
List(metricName string, metricSelector labels.Selector) (*v1beta1.ExternalMetricValueList, error)
}