mirror of https://github.com/k3s-io/k3s
100 lines
2.7 KiB
Go
100 lines
2.7 KiB
Go
/*
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Copyright 2018 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package external_metrics
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import (
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"fmt"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/labels"
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"k8s.io/client-go/kubernetes/scheme"
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"k8s.io/client-go/rest"
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"k8s.io/client-go/util/flowcontrol"
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"k8s.io/metrics/pkg/apis/external_metrics/v1beta1"
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)
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type externalMetricsClient struct {
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client rest.Interface
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}
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func New(client rest.Interface) ExternalMetricsClient {
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return &externalMetricsClient{
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client: client,
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}
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}
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func NewForConfig(c *rest.Config) (ExternalMetricsClient, error) {
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configShallowCopy := *c
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if configShallowCopy.RateLimiter == nil && configShallowCopy.QPS > 0 {
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if configShallowCopy.Burst <= 0 {
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return nil, fmt.Errorf("Burst is required to be greater than 0 when RateLimiter is not set and QPS is set to greater than 0")
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}
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configShallowCopy.RateLimiter = flowcontrol.NewTokenBucketRateLimiter(configShallowCopy.QPS, configShallowCopy.Burst)
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}
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configShallowCopy.APIPath = "/apis"
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if configShallowCopy.UserAgent == "" {
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configShallowCopy.UserAgent = rest.DefaultKubernetesUserAgent()
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}
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configShallowCopy.GroupVersion = &v1beta1.SchemeGroupVersion
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configShallowCopy.NegotiatedSerializer = scheme.Codecs.WithoutConversion()
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client, err := rest.RESTClientFor(&configShallowCopy)
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if err != nil {
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return nil, err
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}
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return New(client), nil
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}
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func NewForConfigOrDie(c *rest.Config) ExternalMetricsClient {
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client, err := NewForConfig(c)
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if err != nil {
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panic(err)
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}
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return client
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}
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func (c *externalMetricsClient) NamespacedMetrics(namespace string) MetricsInterface {
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return &namespacedMetrics{
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client: c,
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namespace: namespace,
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}
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}
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type namespacedMetrics struct {
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client *externalMetricsClient
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namespace string
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}
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func (m *namespacedMetrics) List(metricName string, metricSelector labels.Selector) (*v1beta1.ExternalMetricValueList, error) {
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res := &v1beta1.ExternalMetricValueList{}
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err := m.client.client.Get().
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Namespace(m.namespace).
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Resource(metricName).
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VersionedParams(&metav1.ListOptions{
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LabelSelector: metricSelector.String(),
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}, metav1.ParameterCodec).
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Do().
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Into(res)
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if err != nil {
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return nil, err
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}
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return res, nil
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}
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