Golang slog.Error函数代码示例

func readConf() *conf.Conf {
	conf := &conf.Conf{
		Freq: 15,
	}
	loc := *flagConf
	if *flagConf == "" {
		p, err := exePath()
		if err != nil {
			slog.Error(err)
			return conf
		}
		dir := filepath.Dir(p)
		loc = filepath.Join(dir, "scollector.toml")
	}
	f, err := os.Open(loc)
	if err != nil {
		if *flagConf != "" {
			slog.Fatal(err)
		}
		if *flagDebug {
			slog.Error(err)
		}
	} else {
		defer f.Close()
		md, err := toml.DecodeReader(f, conf)
		if err != nil {
			slog.Fatal(err)
		}
		if u := md.Undecoded(); len(u) > 0 {
			slog.Fatalf("extra keys in %s: %v", loc, u)
		}
	}
	return conf
}

func readConf() *Conf {
	conf := &Conf{
		Freq: 15,
	}
	loc := *flagConf
	if *flagConf == "" {
		p, err := exePath()
		if err != nil {
			slog.Error(err)
			return conf
		}
		dir := filepath.Dir(p)
		loc = filepath.Join(dir, "scollector.toml")
	}
	f, err := os.Open(loc)
	if err != nil {
		if *flagConf != "" {
			slog.Fatal(err)
		}
		if *flagDebug {
			slog.Error(err)
		}
	} else {
		defer f.Close()
		_, err := toml.DecodeReader(f, conf)
		if err != nil {
			slog.Fatal(err)
		}
	}
	return conf
}

func (s *Schedule) ActionNotify(at models.ActionType, user, message string, aks []models.AlertKey) error {
	groupings, err := s.groupActionNotifications(aks)
	if err != nil {
		return err
	}
	for notification, states := range groupings {
		incidents := []*models.IncidentState{}
		for _, state := range states {
			incidents = append(incidents, state)
		}
		data := actionNotificationContext{incidents, user, message, at, s}

		buf := &bytes.Buffer{}
		err := actionNotificationSubjectTemplate.Execute(buf, data)
		if err != nil {
			slog.Error("Error rendering action notification subject", err)
		}
		subject := buf.String()

		buf = &bytes.Buffer{}
		err = actionNotificationBodyTemplate.Execute(buf, data)
		if err != nil {
			slog.Error("Error rendering action notification body", err)
		}

		notification.Notify(subject, buf.String(), []byte(subject), buf.Bytes(), s.SystemConf, "actionNotification")
	}
	return nil
}

func metaWindowsIfaces() {
	var dstConfigs []Win32_NetworkAdapterConfiguration
	q := wmi.CreateQuery(&dstConfigs, "WHERE MACAddress != null")
	err := wmi.Query(q, &dstConfigs)
	if err != nil {
		slog.Error(err)
		return
	}

	mNicConfigs := make(map[uint32]*Win32_NetworkAdapterConfiguration)
	for i, nic := range dstConfigs {
		mNicConfigs[nic.InterfaceIndex] = &dstConfigs[i]
	}

	mNicTeamIDtoSpeed := make(map[string]uint64)
	mNicTeamIDtoMaster := make(map[string]string)
	var dstTeamMembers []MSFT_NetLbfoTeamMember
	q = wmi.CreateQuery(&dstTeamMembers, "")
	err = wmi.QueryNamespace(q, &dstTeamMembers, "root\\StandardCimv2")
	if err == nil {
		for _, teamMember := range dstTeamMembers {
			mNicTeamIDtoSpeed[teamMember.InstanceID] = teamMember.ReceiveLinkSpeed
			mNicTeamIDtoMaster[teamMember.InstanceID] = teamMember.Team
		}
	}

	var dstAdapters []Win32_NetworkAdapter
	q = wmi.CreateQuery(&dstAdapters, "WHERE PhysicalAdapter=True and MACAddress <> null and NetConnectionStatus = 2") //Only adapters with MAC addresses and status="Connected"
	err = wmi.Query(q, &dstAdapters)
	if err != nil {
		slog.Error(err)
		return
	}

	for _, v := range dstAdapters {
		tag := opentsdb.TagSet{"iface": fmt.Sprint("Interface", v.InterfaceIndex)}
		AddMeta("", tag, "description", v.Description, true)
		AddMeta("", tag, "name", v.NetConnectionID, true)
		AddMeta("", tag, "mac", strings.Replace(v.MACAddress, ":", "", -1), true)
		if v.Speed != nil && *v.Speed != 0 {
			AddMeta("", tag, "speed", v.Speed, true)
		} else {
			nicSpeed := mNicTeamIDtoSpeed[v.GUID]
			AddMeta("", tag, "speed", nicSpeed, true)
		}

		nicMaster := mNicTeamIDtoMaster[v.GUID]
		if nicMaster != "" {
			AddMeta("", tag, "master", nicMaster, true)
		}

		nicConfig := mNicConfigs[v.InterfaceIndex]
		if nicConfig != nil {
			for _, ip := range *nicConfig.IPAddress {
				AddMeta("", tag, "addr", ip, true) // blocked by array support in WMI See https://github.com/StackExchange/wmi/issues/5
			}
		}
	}
}

// CheckNotifications processes past notification events. It returns the next time a notification is needed.
func (s *Schedule) CheckNotifications() time.Time {
	silenced := s.Silenced()
	s.Lock("CheckNotifications")
	defer s.Unlock()
	latestTime := utcNow()
	notifications, err := s.DataAccess.Notifications().GetDueNotifications()
	if err != nil {
		slog.Error("Error getting notifications", err)
		return utcNow().Add(time.Minute)
	}
	for ak, ns := range notifications {
		if si := silenced(ak); si != nil {
			slog.Infoln("silencing", ak)
			continue
		}
		for name, t := range ns {
			n := s.RuleConf.GetNotification(name)
			if n == nil {
				continue
			}
			//If alert is currently unevaluated because of a dependency,
			//simply requeue it until the dependency resolves itself.
			_, uneval := s.GetUnknownAndUnevaluatedAlertKeys(ak.Name())
			unevaluated := false
			for _, un := range uneval {
				if un == ak {
					unevaluated = true
					break
				}
			}
			if unevaluated {
				s.QueueNotification(ak, n, t.Add(time.Minute))
				continue
			}
			st, err := s.DataAccess.State().GetLatestIncident(ak)
			if err != nil {
				slog.Error(err)
				continue
			}
			if st == nil {
				continue
			}
			s.Notify(st, n)
		}
	}
	s.sendNotifications(silenced)
	s.pendingNotifications = nil
	err = s.DataAccess.Notifications().ClearNotificationsBefore(latestTime)
	if err != nil {
		slog.Error("Error clearing notifications", err)
		return utcNow().Add(time.Minute)
	}
	timeout, err := s.DataAccess.Notifications().GetNextNotificationTime()
	if err != nil {
		slog.Error("Error getting next notification time", err)
		return utcNow().Add(time.Minute)
	}
	return timeout
}

func (n *Notification) DoGet() {
	resp, err := http.Get(n.Get.String())
	if err != nil {
		slog.Error(err)
		return
	}
	if resp.StatusCode >= 300 {
		slog.Error("bad response on notification get:", resp.Status)
	}
}

func sendBatch(batch []*opentsdb.DataPoint) {
	if Print {
		for _, d := range batch {
			j, err := d.MarshalJSON()
			if err != nil {
				slog.Error(err)
			}
			slog.Info(string(j))
		}
		recordSent(len(batch))
		return
	}

	now := time.Now()
	resp, err := SendDataPoints(batch, tsdbURLs[currentTsdbURL])
	if err == nil {
		defer resp.Body.Close()
	}
	d := time.Since(now).Nanoseconds() / 1e6
	Sample("collect.post.duration", Tags, float64(d))
	Add("collect.post.total_duration", Tags, d)
	Add("collect.post.count", Tags, 1)
	// Some problem with connecting to the server; retry later.
	if err != nil || (resp.StatusCode != http.StatusNoContent && resp.StatusCode != http.StatusOK) {
		if err != nil {
			Add("collect.post.error", Tags, 1)
			slog.Error(err)
			// Switch endpoint if possible
			currentTsdbURL = (currentTsdbURL + 1) % len(tsdbURLs)
		} else if resp.StatusCode != http.StatusNoContent && resp.StatusCode != http.StatusOK {
			Add("collect.post.bad_status", Tags, 1)
			slog.Errorln(resp.Status)
			body, err := ioutil.ReadAll(resp.Body)
			if err != nil {
				slog.Error(err)
			}
			if len(body) > 0 {
				slog.Error(string(body))
			}
			// Switch endpoint if possible
			currentTsdbURL = (currentTsdbURL + 1) % len(tsdbURLs)
		}
		restored := 0
		for _, msg := range batch {
			restored++
			tchan <- msg
		}
		d := time.Second * 5
		Add("collect.post.restore", Tags, int64(restored))
		slog.Infof("restored %d, sleeping %s", restored, d)
		time.Sleep(d)
		return
	}
	recordSent(len(batch))
}

func (n *Notification) DoGet(ak string) {
	resp, err := http.Get(n.Get.String())
	if err != nil {
		slog.Error(err)
		return
	}
	if resp.StatusCode >= 300 {
		slog.Error("bad response on notification get:", resp.Status)
	} else {
		slog.Infof("get notification successful for alert %s. Response code %d.", ak, resp.StatusCode)
	}
}

func c_snmp_cdp(community, host string) (opentsdb.MultiDataPoint, error) {
	var md opentsdb.MultiDataPoint
	cdpEntries := make(map[string]*cdpCacheEntry)
	deviceIdRaw, err := snmp_subtree(host, community, cdpCacheDeviceId)
	if err != nil {
		return md, err
	}
	for k, v := range deviceIdRaw {
		ids := strings.Split(k, ".")
		if len(ids) != 2 {
			slog.Error("unexpected snmp cdpCacheEntry id")
			continue
		}
		cdpEntries[ids[0]] = &cdpCacheEntry{}
		cdpEntries[ids[0]].DeviceId = fmt.Sprintf("%s", v)
		cdpEntries[ids[0]].InterfaceId = ids[1]
	}
	devicePortRaw, err := snmp_subtree(host, community, cdpCacheDevicePort)
	for k, v := range devicePortRaw {
		ids := strings.Split(k, ".")
		if len(ids) != 2 {
			slog.Error("unexpected snmp cdpCacheEntry id")
			continue
		}
		if entry, ok := cdpEntries[ids[0]]; ok {
			entry.DevicePort = fmt.Sprintf("%s", v)
		}
	}
	byInterface := make(map[string][]*cdpCacheEntry)
	for _, entry := range cdpEntries {
		if _, ok := byInterface[entry.InterfaceId]; ok {
			byInterface[entry.InterfaceId] = append(byInterface[entry.InterfaceId], entry)
		} else {
			byInterface[entry.InterfaceId] = []*cdpCacheEntry{entry}
		}
	}
	for iface, entry := range byInterface {
		j, err := json.Marshal(entry)
		if err != nil {
			return md, err
		}
		metadata.AddMeta("", opentsdb.TagSet{"host": host, "iface": iface}, "cdpCacheEntries", string(j), false)
	}
	if err != nil {
		return md, nil
	}
	return md, nil
}

func IndexTSDB(w http.ResponseWriter, r *http.Request) {
	body, err := ioutil.ReadAll(r.Body)
	if err != nil {
		slog.Error(err)
	}
	indexTSDB(r, body)
}

func c_omreport_ps() (opentsdb.MultiDataPoint, error) {
	var md opentsdb.MultiDataPoint
	readOmreport(func(fields []string) {
		if len(fields) < 3 || fields[0] == "Index" {
			return
		}
		id := strings.Replace(fields[0], ":", "_", -1)
		ts := opentsdb.TagSet{"id": id}
		Add(&md, "hw.ps", severity(fields[1]), ts, metadata.Gauge, metadata.Ok, descDellHWPS)
		pm := &metadata.HWPowerSupply{}
		if len(fields) < 6 {
			return
		}
		if fields[4] != "" {
			pm.RatedInputWattage = fields[4]
		}
		if fields[5] != "" {
			pm.RatedOutputWattage = fields[5]
		}
		if j, err := json.Marshal(&pm); err == nil {
			metadata.AddMeta("", ts, "psMeta", string(j), true)
		} else {
			slog.Error(err)
		}
	}, "chassis", "pwrsupplies")
	return md, nil
}

func (c *Client) request(path string, s interface{}) error {
	u := &url.URL{
		Scheme: "https",
		Host:   c.baseAddr,
		Path:   path,
	}
	req, err := http.NewRequest("GET", u.String(), nil)
	if err != nil {
		slog.Error(err)
		return err
	}
	req.Header.Set("Accept", "application/json")
	resp, err := c.client.Do(req)
	if err != nil {
		return err
	}
	defer resp.Body.Close()
	if resp.StatusCode != 200 {
		b, _ := ioutil.ReadAll(resp.Body)
		return fmt.Errorf("%v: %v: %v", req.URL, resp.Status, string(b))
	}
	d := json.NewDecoder(resp.Body)
	if err := d.Decode(&s); err != nil {
		return err
	}
	return nil
}

func queuer() {
	for dp := range tchan {
		qlock.Lock()
		for {
			if len(queue) > MaxQueueLen {
				slock.Lock()
				dropped++
				slock.Unlock()
				break
			}
			m, err := json.Marshal(dp)
			if err != nil {
				slog.Error(err)
			} else {
				queue = append(queue, m)
			}
			select {
			case dp = <-tchan:
				continue
			default:
			}
			break
		}
		qlock.Unlock()
	}
}

func sendMetadata(ms []Metasend) {
	b, err := json.Marshal(&ms)
	if err != nil {
		slog.Error(err)
		return
	}
	resp, err := http.Post(metahost, "application/json", bytes.NewBuffer(b))
	if err != nil {
		slog.Error(err)
		return
	}
	if resp.StatusCode != 204 {
		slog.Errorln("bad metadata return:", resp.Status)
		return
	}
}

func init() {
	err := slog.SetSyslog("scollector")
	if err != nil {
		slog.Error(err)
	}
	slog.Infof("starting %s", version.GetVersionInfo("scollector"))
}