mirror of
https://github.com/prometheus/prometheus.git
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113 lines
3.3 KiB
Go
113 lines
3.3 KiB
Go
// Copyright 2020 The Prometheus 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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package eureka
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import (
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"context"
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"encoding/xml"
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"fmt"
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"io"
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"io/ioutil"
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"net/http"
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"github.com/pkg/errors"
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"github.com/prometheus/common/version"
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)
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var userAgent = fmt.Sprintf("Prometheus/%s", version.Version)
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type Applications struct {
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VersionsDelta int `xml:"versions__delta"`
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AppsHashcode string `xml:"apps__hashcode"`
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Applications []Application `xml:"application"`
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}
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type Application struct {
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Name string `xml:"name"`
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Instances []Instance `xml:"instance"`
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}
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type Port struct {
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Port int `xml:",chardata"`
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Enabled bool `xml:"enabled,attr"`
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}
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type Instance struct {
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HostName string `xml:"hostName"`
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HomePageURL string `xml:"homePageUrl"`
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StatusPageURL string `xml:"statusPageUrl"`
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HealthCheckURL string `xml:"healthCheckUrl"`
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App string `xml:"app"`
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IPAddr string `xml:"ipAddr"`
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VipAddress string `xml:"vipAddress"`
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SecureVipAddress string `xml:"secureVipAddress"`
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Status string `xml:"status"`
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Port *Port `xml:"port"`
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SecurePort *Port `xml:"securePort"`
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DataCenterInfo *DataCenterInfo `xml:"dataCenterInfo"`
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Metadata *MetaData `xml:"metadata"`
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IsCoordinatingDiscoveryServer bool `xml:"isCoordinatingDiscoveryServer"`
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ActionType string `xml:"actionType"`
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CountryID int `xml:"countryId"`
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InstanceID string `xml:"instanceId"`
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}
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type MetaData struct {
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Items []Tag `xml:",any"`
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}
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type Tag struct {
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XMLName xml.Name
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Content string `xml:",innerxml"`
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}
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type DataCenterInfo struct {
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Name string `xml:"name"`
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Class string `xml:"class,attr"`
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Metadata *MetaData `xml:"metadata"`
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}
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const appListPath string = "/apps"
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func fetchApps(ctx context.Context, server string, client *http.Client) (*Applications, error) {
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url := fmt.Sprintf("%s%s", server, appListPath)
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request, err := http.NewRequest("GET", url, nil)
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if err != nil {
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return nil, err
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}
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request = request.WithContext(ctx)
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request.Header.Add("User-Agent", userAgent)
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resp, err := client.Do(request)
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if err != nil {
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return nil, err
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}
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defer func() {
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io.Copy(ioutil.Discard, resp.Body)
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resp.Body.Close()
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}()
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if resp.StatusCode/100 != 2 {
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return nil, errors.Errorf("non 2xx status '%d' response during eureka service discovery", resp.StatusCode)
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}
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var apps Applications
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err = xml.NewDecoder(resp.Body).Decode(&apps)
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if err != nil {
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return nil, errors.Wrapf(err, "%q", url)
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}
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return &apps, nil
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}
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