youtubebeat/vendor/github.com/elastic/beats/metricbeat/module/kibana/kibana.go

105 lines
3.3 KiB
Go

// Licensed to Elasticsearch B.V. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Elasticsearch B.V. licenses this file to you 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 kibana
import (
"encoding/json"
"fmt"
"net/url"
"strings"
"github.com/elastic/beats/libbeat/common"
"github.com/elastic/beats/metricbeat/helper"
"github.com/elastic/beats/metricbeat/helper/elastic"
"github.com/elastic/beats/metricbeat/mb"
)
const (
// ModuleName is the name of this module
ModuleName = "kibana"
// StatsAPIAvailableVersion is the version of Kibana since when the stats API is available
StatsAPIAvailableVersion = "6.4.0"
// SettingsAPIAvailableVersion is the version of Kibana since when the settings API is available
SettingsAPIAvailableVersion = "6.5.0"
)
// ReportErrorForMissingField reports and returns an error message for the given
// field being missing in API response received from Kibana
func ReportErrorForMissingField(field string, r mb.ReporterV2) error {
err := fmt.Errorf("Could not find field '%v' in Kibana stats API response", field)
r.Error(err)
return err
}
// GetVersion returns the version of the Kibana instance
func GetVersion(http *helper.HTTP, currentPath string) (string, error) {
const statusPath = "api/status"
content, err := fetchPath(http, currentPath, statusPath)
if err != nil {
return "", err
}
var data common.MapStr
err = json.Unmarshal(content, &data)
if err != nil {
return "", err
}
version, err := data.GetValue("version.number")
if err != nil {
return "", err
}
versionStr, ok := version.(string)
if !ok {
return "", fmt.Errorf("Could not parse Kibana version in status API response")
}
return versionStr, nil
}
// IsStatsAPIAvailable returns whether the stats API is available in the given version of Kibana
func IsStatsAPIAvailable(currentKibanaVersion string) (bool, error) {
return elastic.IsFeatureAvailable(currentKibanaVersion, StatsAPIAvailableVersion)
}
// IsSettingsAPIAvailable returns whether the settings API is available in the given version of Kibana
func IsSettingsAPIAvailable(currentKibanaVersion string) (bool, error) {
return elastic.IsFeatureAvailable(currentKibanaVersion, SettingsAPIAvailableVersion)
}
func fetchPath(http *helper.HTTP, currentPath, newPath string) ([]byte, error) {
currentURI := http.GetURI()
defer http.SetURI(currentURI) // Reset after this request
// Parse the URI to replace the path
u, err := url.Parse(currentURI)
if err != nil {
return nil, err
}
u.Path = strings.Replace(u.Path, currentPath, newPath, 1) // HACK: to account for base paths
u.RawQuery = ""
// Http helper includes the HostData with username and password
http.SetURI(u.String())
return http.FetchContent()
}