mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
synced 2025-11-04 04:08:16 +00:00
86 lines
2.4 KiB
Go
86 lines
2.4 KiB
Go
/*
|
|
Copyright 2015 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 metrics
|
|
|
|
import (
|
|
"fmt"
|
|
"io/ioutil"
|
|
"net/http"
|
|
"time"
|
|
)
|
|
|
|
type KubeletMetrics Metrics
|
|
|
|
func (m *KubeletMetrics) Equal(o KubeletMetrics) bool {
|
|
return (*Metrics)(m).Equal(Metrics(o))
|
|
}
|
|
|
|
func NewKubeletMetrics() KubeletMetrics {
|
|
result := NewMetrics()
|
|
return KubeletMetrics(result)
|
|
}
|
|
|
|
// GrabKubeletMetricsWithoutProxy retrieve metrics from the kubelet on the given node using a simple GET over http.
|
|
// Currently only used in integration tests.
|
|
func GrabKubeletMetricsWithoutProxy(nodeName string) (KubeletMetrics, error) {
|
|
metricsEndpoint := "http://%s/metrics"
|
|
resp, err := http.Get(fmt.Sprintf(metricsEndpoint, nodeName))
|
|
if err != nil {
|
|
return KubeletMetrics{}, err
|
|
}
|
|
defer resp.Body.Close()
|
|
body, err := ioutil.ReadAll(resp.Body)
|
|
if err != nil {
|
|
return KubeletMetrics{}, err
|
|
}
|
|
return parseKubeletMetrics(string(body))
|
|
}
|
|
|
|
func parseKubeletMetrics(data string) (KubeletMetrics, error) {
|
|
result := NewKubeletMetrics()
|
|
if err := parseMetrics(data, (*Metrics)(&result)); err != nil {
|
|
return KubeletMetrics{}, err
|
|
}
|
|
return result, nil
|
|
}
|
|
|
|
func (g *MetricsGrabber) getMetricsFromNode(nodeName string, kubeletPort int) (string, error) {
|
|
// There's a problem with timing out during proxy. Wrapping this in a goroutine to prevent deadlock.
|
|
// Hanging goroutine will be leaked.
|
|
finished := make(chan struct{})
|
|
var err error
|
|
var rawOutput []byte
|
|
go func() {
|
|
rawOutput, err = g.client.Core().RESTClient().Get().
|
|
Resource("nodes").
|
|
SubResource("proxy").
|
|
Name(fmt.Sprintf("%v:%v", nodeName, kubeletPort)).
|
|
Suffix("metrics").
|
|
Do().Raw()
|
|
finished <- struct{}{}
|
|
}()
|
|
select {
|
|
case <-time.After(ProxyTimeout):
|
|
return "", fmt.Errorf("Timed out when waiting for proxy to gather metrics from %v", nodeName)
|
|
case <-finished:
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
return string(rawOutput), nil
|
|
}
|
|
}
|