prometheus/web/status.go

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// Copyright 2013 The Prometheus 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 web
import (
"net/http"
"sync"
"time"
"github.com/prometheus/prometheus/config"
"github.com/prometheus/prometheus/retrieval"
"github.com/prometheus/prometheus/rules"
)
// PrometheusStatusHandler implements http.Handler.
type PrometheusStatusHandler struct {
mu sync.RWMutex
BuildInfo map[string]string
Config string
Flags map[string]string
RuleManager *rules.Manager
TargetPools func() map[string][]*retrieval.Target
Birth time.Time
PathPrefix string
}
// TargetHealthToClass returns a map of TargetHealth to the name of a Bootstrap CSS class.
func (h *PrometheusStatusHandler) TargetHealthToClass() map[retrieval.TargetHealth]string {
return map[retrieval.TargetHealth]string{
retrieval.HealthUnknown: "warning",
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retrieval.HealthGood: "success",
retrieval.HealthBad: "danger",
}
}
func (h *PrometheusStatusHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
h.mu.RLock()
executeTemplate(w, "status", h, h.PathPrefix)
h.mu.RUnlock()
}
// ApplyConfig updates the status handler's state as the new config requires.
// Returns true on success.
func (h *PrometheusStatusHandler) ApplyConfig(conf *config.Config) bool {
h.mu.Lock()
h.Config = conf.String()
h.mu.Unlock()
return true
}