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Merge pull request kubernetes#80561 from seans3/move-metricsutil-staging
Move pkg/kubectl/metricsutil to staging Kubernetes-commit: c1eff52
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,170 @@ | ||
| /* | ||
| Copyright 2016 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 metricsutil | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "errors" | ||
| "fmt" | ||
|
|
||
| "k8s.io/apimachinery/pkg/api/validation" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "k8s.io/apimachinery/pkg/labels" | ||
| "k8s.io/apimachinery/pkg/runtime/schema" | ||
| corev1client "k8s.io/client-go/kubernetes/typed/core/v1" | ||
| metricsapi "k8s.io/metrics/pkg/apis/metrics" | ||
| metricsv1alpha1api "k8s.io/metrics/pkg/apis/metrics/v1alpha1" | ||
| ) | ||
|
|
||
| const ( | ||
| DefaultHeapsterNamespace = "kube-system" | ||
| DefaultHeapsterScheme = "http" | ||
| DefaultHeapsterService = "heapster" | ||
| DefaultHeapsterPort = "" // use the first exposed port on the service | ||
| ) | ||
|
|
||
| var ( | ||
| prefix = "/apis" | ||
| groupVersion = fmt.Sprintf("%s/%s", metricsGv.Group, metricsGv.Version) | ||
| metricsRoot = fmt.Sprintf("%s/%s", prefix, groupVersion) | ||
|
|
||
| // TODO: get this from metrics api once it's finished | ||
| metricsGv = schema.GroupVersion{Group: "metrics", Version: "v1alpha1"} | ||
| ) | ||
|
|
||
| type HeapsterMetricsClient struct { | ||
| SVCClient corev1client.ServicesGetter | ||
| HeapsterNamespace string | ||
| HeapsterScheme string | ||
| HeapsterService string | ||
| HeapsterPort string | ||
| } | ||
|
|
||
| func NewHeapsterMetricsClient(svcClient corev1client.ServicesGetter, namespace, scheme, service, port string) *HeapsterMetricsClient { | ||
| return &HeapsterMetricsClient{ | ||
| SVCClient: svcClient, | ||
| HeapsterNamespace: namespace, | ||
| HeapsterScheme: scheme, | ||
| HeapsterService: service, | ||
| HeapsterPort: port, | ||
| } | ||
| } | ||
|
|
||
| func podMetricsURL(namespace string, name string) (string, error) { | ||
| if namespace == metav1.NamespaceAll { | ||
| return fmt.Sprintf("%s/pods", metricsRoot), nil | ||
| } | ||
| errs := validation.ValidateNamespaceName(namespace, false) | ||
| if len(errs) > 0 { | ||
| message := fmt.Sprintf("invalid namespace: %s - %v", namespace, errs) | ||
| return "", errors.New(message) | ||
| } | ||
| if len(name) > 0 { | ||
| errs = validation.NameIsDNSSubdomain(name, false) | ||
| if len(errs) > 0 { | ||
| message := fmt.Sprintf("invalid pod name: %s - %v", name, errs) | ||
| return "", errors.New(message) | ||
| } | ||
| } | ||
| return fmt.Sprintf("%s/namespaces/%s/pods/%s", metricsRoot, namespace, name), nil | ||
| } | ||
|
|
||
| func nodeMetricsURL(name string) (string, error) { | ||
| if len(name) > 0 { | ||
| errs := validation.NameIsDNSSubdomain(name, false) | ||
| if len(errs) > 0 { | ||
| message := fmt.Sprintf("invalid node name: %s - %v", name, errs) | ||
| return "", errors.New(message) | ||
| } | ||
| } | ||
| return fmt.Sprintf("%s/nodes/%s", metricsRoot, name), nil | ||
| } | ||
|
|
||
| func (cli *HeapsterMetricsClient) GetNodeMetrics(nodeName string, selector string) (*metricsapi.NodeMetricsList, error) { | ||
| params := map[string]string{"labelSelector": selector} | ||
| path, err := nodeMetricsURL(nodeName) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| resultRaw, err := GetHeapsterMetrics(cli, path, params) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| versionedMetrics := metricsv1alpha1api.NodeMetricsList{} | ||
| if len(nodeName) == 0 { | ||
| err = json.Unmarshal(resultRaw, &versionedMetrics) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to unmarshall heapster response: %v", err) | ||
| } | ||
| } else { | ||
| var singleMetric metricsv1alpha1api.NodeMetrics | ||
| err = json.Unmarshal(resultRaw, &singleMetric) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to unmarshall heapster response: %v", err) | ||
| } | ||
| versionedMetrics.Items = []metricsv1alpha1api.NodeMetrics{singleMetric} | ||
| } | ||
| metrics := &metricsapi.NodeMetricsList{} | ||
| err = metricsv1alpha1api.Convert_v1alpha1_NodeMetricsList_To_metrics_NodeMetricsList(&versionedMetrics, metrics, nil) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return metrics, nil | ||
| } | ||
|
|
||
| func (cli *HeapsterMetricsClient) GetPodMetrics(namespace string, podName string, allNamespaces bool, selector labels.Selector) (*metricsapi.PodMetricsList, error) { | ||
| if allNamespaces { | ||
| namespace = metav1.NamespaceAll | ||
| } | ||
| path, err := podMetricsURL(namespace, podName) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| params := map[string]string{"labelSelector": selector.String()} | ||
| versionedMetrics := metricsv1alpha1api.PodMetricsList{} | ||
|
|
||
| resultRaw, err := GetHeapsterMetrics(cli, path, params) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| if len(podName) == 0 { | ||
| err = json.Unmarshal(resultRaw, &versionedMetrics) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to unmarshall heapster response: %v", err) | ||
| } | ||
| } else { | ||
| var singleMetric metricsv1alpha1api.PodMetrics | ||
| err = json.Unmarshal(resultRaw, &singleMetric) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to unmarshall heapster response: %v", err) | ||
| } | ||
| versionedMetrics.Items = []metricsv1alpha1api.PodMetrics{singleMetric} | ||
| } | ||
| metrics := &metricsapi.PodMetricsList{} | ||
| err = metricsv1alpha1api.Convert_v1alpha1_PodMetricsList_To_metrics_PodMetricsList(&versionedMetrics, metrics, nil) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return metrics, nil | ||
| } | ||
|
|
||
| func GetHeapsterMetrics(cli *HeapsterMetricsClient, path string, params map[string]string) ([]byte, error) { | ||
| return cli.SVCClient.Services(cli.HeapsterNamespace). | ||
| ProxyGet(cli.HeapsterScheme, cli.HeapsterService, cli.HeapsterPort, path, params). | ||
| DoRaw() | ||
| } |
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