290 lines
8.4 KiB
Go
290 lines
8.4 KiB
Go
// The MIT License (MIT)
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//
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// Copyright (c) 2015 Jeff Nickoloff (jeff@allingeek.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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package nsq
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import (
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"encoding/json"
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"fmt"
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"io/ioutil"
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"net/http"
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"net/url"
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"strconv"
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"sync"
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"time"
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"github.com/influxdata/telegraf"
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"github.com/influxdata/telegraf/plugins/inputs"
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)
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// Might add Lookupd endpoints for cluster discovery
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type NSQ struct {
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Endpoints []string
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}
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var sampleConfig = `
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## An array of NSQD HTTP API endpoints
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endpoints = ["http://localhost:4151"]
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`
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const (
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requestPattern = `%s/stats?format=json`
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)
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func init() {
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inputs.Add("nsq", func() telegraf.Input {
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return &NSQ{}
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})
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}
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func (n *NSQ) SampleConfig() string {
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return sampleConfig
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}
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func (n *NSQ) Description() string {
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return "Read NSQ topic and channel statistics."
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}
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func (n *NSQ) Gather(acc telegraf.Accumulator) error {
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var wg sync.WaitGroup
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for _, e := range n.Endpoints {
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wg.Add(1)
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go func(e string) {
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defer wg.Done()
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acc.AddError(n.gatherEndpoint(e, acc))
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}(e)
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}
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wg.Wait()
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return nil
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}
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var tr = &http.Transport{
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ResponseHeaderTimeout: time.Duration(3 * time.Second),
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}
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var client = &http.Client{
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Transport: tr,
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Timeout: time.Duration(4 * time.Second),
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}
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func (n *NSQ) gatherEndpoint(e string, acc telegraf.Accumulator) error {
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u, err := buildURL(e)
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if err != nil {
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return err
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}
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r, err := client.Get(u.String())
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if err != nil {
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return fmt.Errorf("Error while polling %s: %s", u.String(), err)
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}
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defer r.Body.Close()
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if r.StatusCode != http.StatusOK {
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return fmt.Errorf("%s returned HTTP status %s", u.String(), r.Status)
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}
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body, err := ioutil.ReadAll(r.Body)
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if err != nil {
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return fmt.Errorf(`Error reading body: %s`, err)
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}
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data := &NSQStatsData{}
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err = json.Unmarshal(body, data)
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if err != nil {
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return fmt.Errorf(`Error parsing response: %s`, err)
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}
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// Data was not parsed correctly attempt to use old format.
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if len(data.Version) < 1 {
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wrapper := &NSQStats{}
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err = json.Unmarshal(body, wrapper)
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if err != nil {
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return fmt.Errorf(`Error parsing response: %s`, err)
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}
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data = &wrapper.Data
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}
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tags := map[string]string{
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`server_host`: u.Host,
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`server_version`: data.Version,
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}
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fields := make(map[string]interface{})
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if data.Health == `OK` {
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fields["server_count"] = int64(1)
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} else {
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fields["server_count"] = int64(0)
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}
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fields["topic_count"] = int64(len(data.Topics))
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acc.AddFields("nsq_server", fields, tags)
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for _, t := range data.Topics {
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topicStats(t, acc, u.Host, data.Version)
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}
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return nil
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}
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func buildURL(e string) (*url.URL, error) {
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u := fmt.Sprintf(requestPattern, e)
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addr, err := url.Parse(u)
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if err != nil {
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return nil, fmt.Errorf("Unable to parse address '%s': %s", u, err)
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}
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return addr, nil
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}
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func topicStats(t TopicStats, acc telegraf.Accumulator, host, version string) {
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// per topic overall (tag: name, paused, channel count)
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tags := map[string]string{
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"server_host": host,
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"server_version": version,
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"topic": t.Name,
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}
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fields := map[string]interface{}{
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"depth": t.Depth,
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"backend_depth": t.BackendDepth,
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"message_count": t.MessageCount,
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"channel_count": int64(len(t.Channels)),
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}
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acc.AddFields("nsq_topic", fields, tags)
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for _, c := range t.Channels {
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channelStats(c, acc, host, version, t.Name)
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}
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}
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func channelStats(c ChannelStats, acc telegraf.Accumulator, host, version, topic string) {
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tags := map[string]string{
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"server_host": host,
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"server_version": version,
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"topic": topic,
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"channel": c.Name,
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}
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fields := map[string]interface{}{
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"depth": c.Depth,
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"backend_depth": c.BackendDepth,
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"inflight_count": c.InFlightCount,
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"deferred_count": c.DeferredCount,
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"message_count": c.MessageCount,
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"requeue_count": c.RequeueCount,
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"timeout_count": c.TimeoutCount,
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"client_count": int64(len(c.Clients)),
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}
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acc.AddFields("nsq_channel", fields, tags)
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for _, cl := range c.Clients {
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clientStats(cl, acc, host, version, topic, c.Name)
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}
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}
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func clientStats(c ClientStats, acc telegraf.Accumulator, host, version, topic, channel string) {
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tags := map[string]string{
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"server_host": host,
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"server_version": version,
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"topic": topic,
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"channel": channel,
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"client_id": c.ID,
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"client_hostname": c.Hostname,
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"client_version": c.Version,
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"client_address": c.RemoteAddress,
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"client_user_agent": c.UserAgent,
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"client_tls": strconv.FormatBool(c.TLS),
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"client_snappy": strconv.FormatBool(c.Snappy),
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"client_deflate": strconv.FormatBool(c.Deflate),
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}
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if len(c.Name) > 0 {
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tags["client_name"] = c.Name
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}
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fields := map[string]interface{}{
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"ready_count": c.ReadyCount,
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"inflight_count": c.InFlightCount,
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"message_count": c.MessageCount,
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"finish_count": c.FinishCount,
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"requeue_count": c.RequeueCount,
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}
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acc.AddFields("nsq_client", fields, tags)
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}
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type NSQStats struct {
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Code int64 `json:"status_code"`
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Txt string `json:"status_txt"`
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Data NSQStatsData `json:"data"`
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}
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type NSQStatsData struct {
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Version string `json:"version"`
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Health string `json:"health"`
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StartTime int64 `json:"start_time"`
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Topics []TopicStats `json:"topics"`
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}
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// e2e_processing_latency is not modeled
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type TopicStats struct {
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Name string `json:"topic_name"`
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Depth int64 `json:"depth"`
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BackendDepth int64 `json:"backend_depth"`
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MessageCount int64 `json:"message_count"`
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Paused bool `json:"paused"`
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Channels []ChannelStats `json:"channels"`
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}
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// e2e_processing_latency is not modeled
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type ChannelStats struct {
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Name string `json:"channel_name"`
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Depth int64 `json:"depth"`
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BackendDepth int64 `json:"backend_depth"`
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InFlightCount int64 `json:"in_flight_count"`
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DeferredCount int64 `json:"deferred_count"`
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MessageCount int64 `json:"message_count"`
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RequeueCount int64 `json:"requeue_count"`
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TimeoutCount int64 `json:"timeout_count"`
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Paused bool `json:"paused"`
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Clients []ClientStats `json:"clients"`
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}
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type ClientStats struct {
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Name string `json:"name"` // DEPRECATED 1.x+, still here as the structs are currently being shared for parsing v3.x and 1.x
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ID string `json:"client_id"`
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Hostname string `json:"hostname"`
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Version string `json:"version"`
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RemoteAddress string `json:"remote_address"`
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State int64 `json:"state"`
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ReadyCount int64 `json:"ready_count"`
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InFlightCount int64 `json:"in_flight_count"`
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MessageCount int64 `json:"message_count"`
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FinishCount int64 `json:"finish_count"`
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RequeueCount int64 `json:"requeue_count"`
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ConnectTime int64 `json:"connect_ts"`
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SampleRate int64 `json:"sample_rate"`
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Deflate bool `json:"deflate"`
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Snappy bool `json:"snappy"`
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UserAgent string `json:"user_agent"`
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TLS bool `json:"tls"`
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TLSCipherSuite string `json:"tls_cipher_suite"`
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TLSVersion string `json:"tls_version"`
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TLSNegotiatedProtocol string `json:"tls_negotiated_protocol"`
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TLSNegotiatedProtocolIsMutual bool `json:"tls_negotiated_protocol_is_mutual"`
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}
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