Example #1
0
// function to check query list, try to init them and build query, and exit with
// displaying relevant errors, if any
func (e *Env) checkAndExit() {
	var err bool
	var err2 error
	var errcount uint32

	if len(g_queryList) == 0 {
		eslog.Warning("%s : No query added, %d", os.Args[0])
		errcount++
	}

	for k, v := range g_queryList {
		eslog.Info("%s : initiating...", k)
		err = v.SetQueryConfig(config.G_Config.ManualConfig.List)
		if err {
			eslog.Error("%s : failed to get config", k)
			errcount++
			continue
		}
		_, err2 = v.BuildQuery()
		if err2 != nil {
			eslog.Error("%s : error while building query, %s", k, err2.Error())
			errcount++
		}

		//test scheduler and sender
		schedule := new(scheduler)
		send := new(sender)
		schedInfo, ok := e.queries[strings.ToLower(k)]
		if ok {
			if errinit := schedule.initScheduler(&schedInfo); errinit != nil {
				eslog.Error("%s : error in schedule info, %s", k, errinit.Error())
				errcount++
			}
		} else {
			eslog.Error("%s : error while getting query info in yaml", k)
			errcount++
		}
		if err2 = send.initSender(&schedInfo); err2 != nil {
			eslog.Error("%s : error while getting query information, %s", k, err2.Error())
			errcount++
		}
	}

	if errcount > 0 {
		eslog.Warning("%s : Detected %d errors", os.Args[0], errcount)
	} else {
		eslog.Info("%s : Everything is ok !", os.Args[0])
	}
	os.Exit(0)
}
Example #2
0
func (e *Env) parseQueries() int {
	var size int

	autoQueryList := getAutoQueryList(e.queries)

	//add autoqueries to queryList
	if size = len(autoQueryList); size > 0 {
		m := initAutoQueries(autoQueryList)
		for k, v := range m {
			g_queryList[k] = v
			if *e.flagcheck {
				eslog.Info("%s : added autoquery %s", os.Args[0], k)
			}
		}
		eslog.Info("%s : %d autoqueries added", os.Args[0], size)
	}
	if *e.flagcheck {
		e.checkAndExit()
	}
	return size
}
Example #3
0
func launchServer() {
	path, port := serverPath(), serverPort()
	var auth *BasicAuth

	eslog.Info("%s : launching server on path %s and port %s", os.Args[0], path, port)
	if IsServerAuthentication() {
		auth = NewBasicAuth(getServerLogin(), getServerPassword())
		auth.setDisplayFunc(collectorDisplay)
		http.HandleFunc(path, auth.BasicAuthHandler)
	} else {
		http.HandleFunc(path, collectorDisplay)
	}
	log.Fatal(http.ListenAndServe(":"+port, nil))
}
Example #4
0
func (e *Env) connect() {
	var err error

	config := config.G_Config.Config
	if config == nil || config.Cluster_addr == "" {
		log.Fatal("No config info to start connection ! Check your yml")
	}

	eslog.Info("%s : connection attempt to %s", os.Args[0], config.Cluster_addr)
	if isAuthentication() {
		e.client, err = elastic.NewClient(
			elastic.SetSniff(false),
			elastic.SetURL(config.Cluster_addr),
			elastic.SetBasicAuth(getAuthLogin(), getAuthPassword()))
	} else {
		e.client, err = elastic.NewClient(elastic.SetSniff(false),
			elastic.SetURL(config.Cluster_addr))
	}
	if err != nil {
		log.Fatal(err.Error())
	} else {
		eslog.Info("%s : connection succeeded", os.Args[0])
	}
}
Example #5
0
// function that handles the life of each query
func launchQuery(c queries.Query, name string, env *Env) {
	schedule := new(scheduler)
	retries := getMaxRetries()
	send := new(sender)
	stats := queryStats{true, false, retries, 0, "None"}
	var query elastic.Query

	//query initiation
	eslog.Info("%s : getting query configuration", name)
	c.SetQueryConfig(config.G_Config.ManualConfig.List)
	query, err := c.BuildQuery()
	if err != nil {
		eslog.Error("%s : failed to build query, %s", name, err.Error())
		stats.IsUp = false
		if isServer() {
			go collectorUpdate(stats, name)
		}
		return
	}

	//scheduler and sender initiation
	schedInfo, ok := env.queries[strings.ToLower(name)]
	if ok {
		schedule.initScheduler(&schedInfo)
	} else {
		schedule.initSchedulerDefault()
	}
	err = send.initSender(&schedInfo)
	if err != nil {
		eslog.Error("%s : initSender failed, %s", name, err.Error())
		stats.IsUp = false
		if isServer() {
			go collectorUpdate(stats, name)
		}
		return
	}
	eslog.Info("%s : Starting...", name)

	//loop forever
	for {
		//try to send request. If fails, continue while decreasing attempts, or
		//die if retries reach 0.
		env.semaphore <- struct{}{}
		results, err := send.SendRequest(env.client, query)
		<-env.semaphore

		if err != nil {
			eslog.Error(err.Error())
			stats.Tries -= 1
			if stats.Tries == 0 {
				eslog.Error("%s : max attempts reached, stopping query", name)
				stats.IsUp = false
				if isServer() {
					go collectorUpdate(stats, name)
				}
				return
			} else {
				//retry after schedule
				eslog.Warning("%s : failed to connect, number of attempts left : %d", name, stats.Tries)
				if isServer() {
					go collectorUpdate(stats, name)
				}
				schedule.wait()
				continue
			}
		}

		// interpet the results, if any
		if results != nil && results.Hits != nil && results.Hits.TotalHits > 0 {
			//request succeeded, restart attempts
			stats.Tries = getMaxRetries()
			eslog.Warning("%s : found a total of %d results", name, results.Hits.TotalHits)
			yes := c.CheckCondition(results)
			if yes {
				//condition is verified. Should we enter alert status ?
				if !schedule.isAlertOnlyOnce || (schedule.isAlertOnlyOnce && !schedule.alertState) {
					eslog.Alert("%s : Action triggered", name)
					c.DoAction(results)
					schedule.alertState = true
					stats.AlertStatus = true
					stats.LastAlert = time.Now().Format(TIMELAYOUT)
					stats.NbAlerts++
				}
			} else if !yes {
				//condition not verified. Exiting alert status, triggering onAlertEnd() if necessary
				if schedule.alertState == true && schedule.isAlertEndMsg == true {
					c.OnAlertEnd()
				}
				schedule.alertState = false
				stats.AlertStatus = false
			}
		} else {
			// no results found
			eslog.Info("%s : no result found", name)
			if schedule.alertState == true && schedule.isAlertEndMsg == true {
				c.OnAlertEnd()
			}
			schedule.alertState = false
			stats.AlertStatus = false
		}
		//update the stats and display them, if necessary
		if isServer() {
			go collectorUpdate(stats, name)
		}
		//wait, and do it again
		schedule.wait()
	}
}