// Copyright (C) 2014-2018 Goodrain Co., Ltd.
// RAINBOND, Application Management Platform
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version. For any non-GPL usage of Rainbond,
// one or multiple Commercial Licenses authorized by Goodrain Co., Ltd.
// must be obtained first.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see .
package monitor
import (
"context"
"net/http"
"github.com/Sirupsen/logrus"
"github.com/goodrain/rainbond/cmd/worker/option"
httputil "github.com/goodrain/rainbond/util/http"
status "github.com/goodrain/rainbond/worker/client"
"github.com/goodrain/rainbond/worker/discover"
"github.com/goodrain/rainbond/worker/monitor/collector"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
"github.com/prometheus/common/log"
)
//ExporterManager app resource exporter
type ExporterManager struct {
ctx context.Context
cancel context.CancelFunc
config option.Config
stopChan chan struct{}
statusManager *status.AppRuntimeSyncClient
}
//NewManager return *NewManager
func NewManager(c option.Config, statusManager *status.AppRuntimeSyncClient) *ExporterManager {
ctx, cancel := context.WithCancel(context.Background())
return &ExporterManager{
ctx: ctx,
cancel: cancel,
config: c,
stopChan: make(chan struct{}),
statusManager: statusManager,
}
}
func (t *ExporterManager) handler(w http.ResponseWriter, r *http.Request) {
registry := prometheus.NewRegistry()
registry.MustRegister(collector.New(t.statusManager))
gatherers := prometheus.Gatherers{
prometheus.DefaultGatherer,
registry,
}
// Delegate http serving to Prometheus client library, which will call collector.Collect.
h := promhttp.HandlerFor(gatherers, promhttp.HandlerOpts{})
h.ServeHTTP(w, r)
}
//Start 启动
func (t *ExporterManager) Start() error {
http.HandleFunc(t.config.PrometheusMetricPath, prometheus.InstrumentHandlerFunc("metrics", t.handler))
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
w.Write([]byte(`
Worker exporter
Worker exporter
Metrics
`))
})
http.HandleFunc("/worker/health", func(w http.ResponseWriter, r *http.Request) {
healthStatus := discover.HealthCheck()
if healthStatus["status"] != "health" {
httputil.ReturnError(r, w, 400, "worker service unusual")
}
httputil.ReturnSuccess(r, w, healthStatus)
})
log.Infoln("Listening on", t.config.Listen)
go func() {
log.Fatal(http.ListenAndServe(t.config.Listen, nil))
}()
logrus.Info("start app resource exporter success.")
return nil
}
//Stop 停止
func (t *ExporterManager) Stop() {
t.cancel()
}