Source improvement for librato output (#1416)
* Source improvement for librato output Build the source from the list of tag instead of a configuration specified single tag Graphite Serializer: * make buildTags public * make sure not to use empty tags Librato output: * Improve Error handling for librato API base on error or debug flag * Send Metric per Batch (max 300) * use Graphite BuildTag function to generate source The change is made that it should be retro compatible Metric sample: server=127.0.0.1 port=80 state=leader env=test measurement.metric_name value service_n.metric_x Metric before with source tags set as "server": source=127.0.0.1 test.80.127_0_0_1.leader.measurement.metric_name test.80.127_0_0_1.leader.service_n.metric_x Metric now: source=test.80.127.0.0.1.leader measurement.metric_name service_n.metric_x As you can see the source in the "new" version is much more precise That way when filter (only from source) you can filter by env or any other tags * Using template to specify which tagsusing for source, default concat all tags * revert change in graphite serializer * better documentation, change default for template * fmt * test passing with new host as default tags * use host tag in api integration test * Limit 80 char per line, change resolution to be a int in the sample * fmt * remove resolution, doc for template * fmt
This commit is contained in:
tuier
Aurélien Hébert
parent
9c1645f226
commit
416f0ded87
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@ -7,6 +7,7 @@ import (
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"io/ioutil"
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"log"
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"net/http"
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"regexp"
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"github.com/influxdata/telegraf"
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"github.com/influxdata/telegraf/internal"
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@ -14,19 +15,22 @@ import (
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"github.com/influxdata/telegraf/plugins/serializers/graphite"
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)
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// Librato structure for configuration and client
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type Librato struct {
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ApiUser string
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ApiToken string
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Debug bool
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NameFromTags bool
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SourceTag string
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Timeout internal.Duration
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Template string
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APIUser string
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APIToken string
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Debug bool
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SourceTag string // Deprecated, keeping for backward-compatibility
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Timeout internal.Duration
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Template string
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apiUrl string
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APIUrl string
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client *http.Client
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}
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// https://www.librato.com/docs/kb/faq/best_practices/naming_convention_metrics_sources.html#naming-limitations-for-sources-and-metrics
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var reUnacceptedChar = regexp.MustCompile("[^.a-zA-Z0-9_-]")
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var sampleConfig = `
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## Librator API Docs
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## http://dev.librato.com/v1/metrics-authentication
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@ -36,20 +40,21 @@ var sampleConfig = `
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api_token = "my-secret-token" # required.
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## Debug
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# debug = false
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## Tag Field to populate source attribute (optional)
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## This is typically the _hostname_ from which the metric was obtained.
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source_tag = "host"
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## Connection timeout.
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# timeout = "5s"
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## Output Name Template (same as graphite buckets)
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## Output source Template (same as graphite buckets)
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## see https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_OUTPUT.md#graphite
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template = "host.tags.measurement.field"
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## This template is used in librato's source (not metric's name)
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template = "host"
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`
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// LMetrics is the default struct for Librato's API fromat
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type LMetrics struct {
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Gauges []*Gauge `json:"gauges"`
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}
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// Gauge is the gauge format for Librato's API fromat
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type Gauge struct {
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Name string `json:"name"`
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Value float64 `json:"value"`
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@ -57,17 +62,22 @@ type Gauge struct {
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MeasureTime int64 `json:"measure_time"`
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}
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const librato_api = "https://metrics-api.librato.com/v1/metrics"
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const libratoAPI = "https://metrics-api.librato.com/v1/metrics"
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func NewLibrato(apiUrl string) *Librato {
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// NewLibrato is the main constructor for librato output plugins
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func NewLibrato(apiURL string) *Librato {
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return &Librato{
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apiUrl: apiUrl,
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APIUrl: apiURL,
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Template: "host",
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}
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}
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// Connect is the default output plugin connection function who make sure it
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// can connect to the endpoint
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func (l *Librato) Connect() error {
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if l.ApiUser == "" || l.ApiToken == "" {
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return fmt.Errorf("api_user and api_token are required fields for librato output")
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if l.APIUser == "" || l.APIToken == "" {
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return fmt.Errorf(
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"api_user and api_token are required fields for librato output")
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}
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l.client = &http.Client{
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Timeout: l.Timeout.Duration,
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@ -76,18 +86,23 @@ func (l *Librato) Connect() error {
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}
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func (l *Librato) Write(metrics []telegraf.Metric) error {
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if len(metrics) == 0 {
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return nil
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}
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lmetrics := LMetrics{}
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if l.Template == "" {
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l.Template = "host"
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}
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if l.SourceTag != "" {
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l.Template = l.SourceTag
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}
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tempGauges := []*Gauge{}
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metricCounter := 0
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for _, m := range metrics {
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if gauges, err := l.buildGauges(m); err == nil {
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for _, gauge := range gauges {
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tempGauges = append(tempGauges, gauge)
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metricCounter++
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if l.Debug {
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log.Printf("[DEBUG] Got a gauge: %v\n", gauge)
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}
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@ -100,81 +115,115 @@ func (l *Librato) Write(metrics []telegraf.Metric) error {
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}
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}
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lmetrics.Gauges = make([]*Gauge, metricCounter)
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copy(lmetrics.Gauges, tempGauges[0:])
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metricsBytes, err := json.Marshal(lmetrics)
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if err != nil {
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return fmt.Errorf("unable to marshal Metrics, %s\n", err.Error())
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} else {
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metricCounter := len(tempGauges)
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// make sur we send a batch of maximum 300
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sizeBatch := 300
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for start := 0; start < metricCounter; start += sizeBatch {
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lmetrics := LMetrics{}
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end := start + sizeBatch
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if end > metricCounter {
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end = metricCounter
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sizeBatch = end - start
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}
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lmetrics.Gauges = make([]*Gauge, sizeBatch)
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copy(lmetrics.Gauges, tempGauges[start:end])
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metricsBytes, err := json.Marshal(lmetrics)
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if err != nil {
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return fmt.Errorf("unable to marshal Metrics, %s\n", err.Error())
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}
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if l.Debug {
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log.Printf("[DEBUG] Librato request: %v\n", string(metricsBytes))
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}
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}
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req, err := http.NewRequest("POST", l.apiUrl, bytes.NewBuffer(metricsBytes))
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if err != nil {
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return fmt.Errorf("unable to create http.Request, %s\n", err.Error())
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}
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req.Header.Add("Content-Type", "application/json")
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req.SetBasicAuth(l.ApiUser, l.ApiToken)
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resp, err := l.client.Do(req)
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if err != nil {
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if l.Debug {
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log.Printf("[DEBUG] Error POSTing metrics: %v\n", err.Error())
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req, err := http.NewRequest(
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"POST",
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l.APIUrl,
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bytes.NewBuffer(metricsBytes))
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if err != nil {
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return fmt.Errorf(
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"unable to create http.Request, %s\n",
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err.Error())
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}
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return fmt.Errorf("error POSTing metrics, %s\n", err.Error())
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} else {
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if l.Debug {
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req.Header.Add("Content-Type", "application/json")
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req.SetBasicAuth(l.APIUser, l.APIToken)
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resp, err := l.client.Do(req)
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if err != nil {
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if l.Debug {
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log.Printf("[DEBUG] Error POSTing metrics: %v\n", err.Error())
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}
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return fmt.Errorf("error POSTing metrics, %s\n", err.Error())
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}
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defer resp.Body.Close()
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if resp.StatusCode != 200 || l.Debug {
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htmlData, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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log.Printf("[DEBUG] Couldn't get response! (%v)\n", err)
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} else {
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}
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if resp.StatusCode != 200 {
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return fmt.Errorf(
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"received bad status code, %d\n %s",
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resp.StatusCode,
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string(htmlData))
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}
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if l.Debug {
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log.Printf("[DEBUG] Librato response: %v\n", string(htmlData))
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}
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}
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}
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defer resp.Body.Close()
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if resp.StatusCode != 200 {
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return fmt.Errorf("received bad status code, %d\n", resp.StatusCode)
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}
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return nil
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}
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// SampleConfig is function who return the default configuration for this
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// output
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func (l *Librato) SampleConfig() string {
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return sampleConfig
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}
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// Description is function who return the Description of this output
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func (l *Librato) Description() string {
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return "Configuration for Librato API to send metrics to."
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}
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func (l *Librato) buildGauges(m telegraf.Metric) ([]*Gauge, error) {
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gauges := []*Gauge{}
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bucket := graphite.SerializeBucketName(m.Name(), m.Tags(), l.Template, "")
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if m.Time().Unix() == 0 {
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return gauges, fmt.Errorf(
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"Measure time must not be zero\n <%s> \n",
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m.String())
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}
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metricSource := graphite.InsertField(
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graphite.SerializeBucketName("", m.Tags(), l.Template, ""),
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"value")
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if metricSource == "" {
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return gauges,
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fmt.Errorf("undeterminable Source type from Field, %s\n",
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l.Template)
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}
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for fieldName, value := range m.Fields() {
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metricName := m.Name()
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if fieldName != "value" {
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metricName = fmt.Sprintf("%s.%s", m.Name(), fieldName)
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}
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gauge := &Gauge{
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Name: graphite.InsertField(bucket, fieldName),
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Source: reUnacceptedChar.ReplaceAllString(metricSource, "-"),
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Name: reUnacceptedChar.ReplaceAllString(metricName, "-"),
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MeasureTime: m.Time().Unix(),
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}
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if !gauge.verifyValue(value) {
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if !verifyValue(value) {
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continue
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}
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if err := gauge.setValue(value); err != nil {
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return gauges, fmt.Errorf("unable to extract value from Fields, %s\n",
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return gauges, fmt.Errorf(
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"unable to extract value from Fields, %s\n",
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err.Error())
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}
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if l.SourceTag != "" {
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if source, ok := m.Tags()[l.SourceTag]; ok {
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gauge.Source = source
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} else {
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return gauges,
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fmt.Errorf("undeterminable Source type from Field, %s\n",
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l.SourceTag)
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}
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}
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gauges = append(gauges, gauge)
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}
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if l.Debug {
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@ -183,7 +232,7 @@ func (l *Librato) buildGauges(m telegraf.Metric) ([]*Gauge, error) {
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return gauges, nil
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}
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func (g *Gauge) verifyValue(v interface{}) bool {
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func verifyValue(v interface{}) bool {
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switch v.(type) {
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case string:
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return false
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@ -209,12 +258,13 @@ func (g *Gauge) setValue(v interface{}) error {
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return nil
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}
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//Close is used to close the connection to librato Output
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func (l *Librato) Close() error {
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return nil
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}
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func init() {
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outputs.Add("librato", func() telegraf.Output {
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return NewLibrato(librato_api)
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return NewLibrato(libratoAPI)
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})
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}
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@ -1,7 +1,6 @@
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package librato
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import (
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"encoding/json"
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"fmt"
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"net/http"
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"net/http/httptest"
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@ -10,141 +9,137 @@ import (
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"time"
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"github.com/influxdata/telegraf"
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"github.com/influxdata/telegraf/plugins/serializers/graphite"
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"github.com/influxdata/telegraf/testutil"
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"github.com/stretchr/testify/require"
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)
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var (
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fakeUrl = "http://test.librato.com"
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fakeURL = "http://test.librato.com"
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fakeUser = "telegraf@influxdb.com"
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fakeToken = "123456"
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)
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func fakeLibrato() *Librato {
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l := NewLibrato(fakeUrl)
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l.ApiUser = fakeUser
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l.ApiToken = fakeToken
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l := NewLibrato(fakeURL)
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l.APIUser = fakeUser
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l.APIToken = fakeToken
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return l
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}
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func BuildTags(t *testing.T) {
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testMetric := testutil.TestMetric(0.0, "test1")
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graphiteSerializer := graphite.GraphiteSerializer{}
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tags, err := graphiteSerializer.Serialize(testMetric)
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fmt.Printf("Tags: %v", tags)
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require.NoError(t, err)
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}
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func TestUriOverride(t *testing.T) {
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ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(http.StatusOK)
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}))
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ts := httptest.NewServer(
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http.HandlerFunc(
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func(w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(http.StatusOK)
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}))
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defer ts.Close()
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l := NewLibrato(ts.URL)
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l.ApiUser = "telegraf@influxdb.com"
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l.ApiToken = "123456"
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l.APIUser = "telegraf@influxdb.com"
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l.APIToken = "123456"
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err := l.Connect()
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require.NoError(t, err)
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err = l.Write(testutil.MockMetrics())
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err = l.Write([]telegraf.Metric{newHostMetric(int32(0), "name", "host")})
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require.NoError(t, err)
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}
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func TestBadStatusCode(t *testing.T) {
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ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(http.StatusServiceUnavailable)
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json.NewEncoder(w).Encode(`{
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"errors": {
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"system": [
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"The API is currently down for maintenance. It'll be back shortly."
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]
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}
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}`)
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}))
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ts := httptest.NewServer(
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http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(http.StatusServiceUnavailable)
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}))
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defer ts.Close()
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l := NewLibrato(ts.URL)
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l.ApiUser = "telegraf@influxdb.com"
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l.ApiToken = "123456"
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l.APIUser = "telegraf@influxdb.com"
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l.APIToken = "123456"
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err := l.Connect()
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require.NoError(t, err)
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err = l.Write(testutil.MockMetrics())
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err = l.Write([]telegraf.Metric{newHostMetric(int32(0), "name", "host")})
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if err == nil {
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t.Errorf("error expected but none returned")
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} else {
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require.EqualError(t, fmt.Errorf("received bad status code, 503\n"), err.Error())
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require.EqualError(
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t,
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fmt.Errorf("received bad status code, 503\n "), err.Error())
|
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}
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}
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func TestBuildGauge(t *testing.T) {
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mtime := time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC).Unix()
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var gaugeTests = []struct {
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ptIn telegraf.Metric
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outGauge *Gauge
|
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err error
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}{
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{
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testutil.TestMetric(0.0, "test1"),
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newHostMetric(0.0, "test1", "host1"),
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&Gauge{
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Name: "value1.test1",
|
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MeasureTime: time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC).Unix(),
|
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Name: "test1",
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MeasureTime: mtime,
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Value: 0.0,
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Source: "host1",
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},
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nil,
|
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},
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{
|
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testutil.TestMetric(1.0, "test2"),
|
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newHostMetric(1.0, "test2", "host2"),
|
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&Gauge{
|
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Name: "value1.test2",
|
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MeasureTime: time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC).Unix(),
|
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Name: "test2",
|
||||
MeasureTime: mtime,
|
||||
Value: 1.0,
|
||||
Source: "host2",
|
||||
},
|
||||
nil,
|
||||
},
|
||||
{
|
||||
testutil.TestMetric(10, "test3"),
|
||||
newHostMetric(10, "test3", "host3"),
|
||||
&Gauge{
|
||||
Name: "value1.test3",
|
||||
MeasureTime: time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC).Unix(),
|
||||
Name: "test3",
|
||||
MeasureTime: mtime,
|
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Value: 10.0,
|
||||
Source: "host3",
|
||||
},
|
||||
nil,
|
||||
},
|
||||
{
|
||||
testutil.TestMetric(int32(112345), "test4"),
|
||||
newHostMetric(int32(112345), "test4", "host4"),
|
||||
&Gauge{
|
||||
Name: "value1.test4",
|
||||
MeasureTime: time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC).Unix(),
|
||||
Name: "test4",
|
||||
MeasureTime: mtime,
|
||||
Value: 112345.0,
|
||||
Source: "host4",
|
||||
},
|
||||
nil,
|
||||
},
|
||||
{
|
||||
testutil.TestMetric(int64(112345), "test5"),
|
||||
newHostMetric(int64(112345), "test5", "host5"),
|
||||
&Gauge{
|
||||
Name: "value1.test5",
|
||||
MeasureTime: time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC).Unix(),
|
||||
Name: "test5",
|
||||
MeasureTime: mtime,
|
||||
Value: 112345.0,
|
||||
Source: "host5",
|
||||
},
|
||||
nil,
|
||||
},
|
||||
{
|
||||
testutil.TestMetric(float32(11234.5), "test6"),
|
||||
newHostMetric(float32(11234.5), "test6", "host6"),
|
||||
&Gauge{
|
||||
Name: "value1.test6",
|
||||
MeasureTime: time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC).Unix(),
|
||||
Name: "test6",
|
||||
MeasureTime: mtime,
|
||||
Value: 11234.5,
|
||||
Source: "host6",
|
||||
},
|
||||
nil,
|
||||
},
|
||||
{
|
||||
testutil.TestMetric("11234.5", "test7"),
|
||||
newHostMetric("11234.5", "test7", "host7"),
|
||||
nil,
|
||||
nil,
|
||||
},
|
||||
}
|
||||
|
||||
l := NewLibrato(fakeUrl)
|
||||
l := NewLibrato(fakeURL)
|
||||
for _, gt := range gaugeTests {
|
||||
gauges, err := l.buildGauges(gt.ptIn)
|
||||
if err != nil && gt.err == nil {
|
||||
|
|
@ -167,61 +162,121 @@ func TestBuildGauge(t *testing.T) {
|
|||
}
|
||||
}
|
||||
|
||||
func newHostMetric(value interface{}, name, host string) (metric telegraf.Metric) {
|
||||
metric, _ = telegraf.NewMetric(
|
||||
name,
|
||||
map[string]string{"host": host},
|
||||
map[string]interface{}{"value": value},
|
||||
time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC),
|
||||
)
|
||||
return
|
||||
}
|
||||
|
||||
func TestBuildGaugeWithSource(t *testing.T) {
|
||||
mtime := time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC)
|
||||
pt1, _ := telegraf.NewMetric(
|
||||
"test1",
|
||||
map[string]string{"hostname": "192.168.0.1", "tag1": "value1"},
|
||||
map[string]interface{}{"value": 0.0},
|
||||
time.Date(2010, time.November, 10, 23, 0, 0, 0, time.UTC),
|
||||
mtime,
|
||||
)
|
||||
pt2, _ := telegraf.NewMetric(
|
||||
"test2",
|
||||
map[string]string{"hostnam": "192.168.0.1", "tag1": "value1"},
|
||||
map[string]interface{}{"value": 1.0},
|
||||
time.Date(2010, time.December, 10, 23, 0, 0, 0, time.UTC),
|
||||
mtime,
|
||||
)
|
||||
pt3, _ := telegraf.NewMetric(
|
||||
"test3",
|
||||
map[string]string{
|
||||
"hostname": "192.168.0.1",
|
||||
"tag2": "value2",
|
||||
"tag1": "value1"},
|
||||
map[string]interface{}{"value": 1.0},
|
||||
mtime,
|
||||
)
|
||||
pt4, _ := telegraf.NewMetric(
|
||||
"test4",
|
||||
map[string]string{
|
||||
"hostname": "192.168.0.1",
|
||||
"tag2": "value2",
|
||||
"tag1": "value1"},
|
||||
map[string]interface{}{"value": 1.0},
|
||||
mtime,
|
||||
)
|
||||
var gaugeTests = []struct {
|
||||
ptIn telegraf.Metric
|
||||
template string
|
||||
outGauge *Gauge
|
||||
err error
|
||||
}{
|
||||
|
||||
{
|
||||
pt1,
|
||||
"hostname",
|
||||
&Gauge{
|
||||
Name: "192_168_0_1.value1.test1",
|
||||
MeasureTime: time.Date(2010, time.November, 10, 23, 0, 0, 0, time.UTC).Unix(),
|
||||
Name: "test1",
|
||||
MeasureTime: mtime.Unix(),
|
||||
Value: 0.0,
|
||||
Source: "192.168.0.1",
|
||||
Source: "192_168_0_1",
|
||||
},
|
||||
nil,
|
||||
},
|
||||
{
|
||||
pt2,
|
||||
"hostname",
|
||||
&Gauge{
|
||||
Name: "192_168_0_1.value1.test1",
|
||||
MeasureTime: time.Date(2010, time.December, 10, 23, 0, 0, 0, time.UTC).Unix(),
|
||||
Name: "test2",
|
||||
MeasureTime: mtime.Unix(),
|
||||
Value: 1.0,
|
||||
},
|
||||
fmt.Errorf("undeterminable Source type from Field, hostname"),
|
||||
},
|
||||
{
|
||||
pt3,
|
||||
"tags",
|
||||
&Gauge{
|
||||
Name: "test3",
|
||||
MeasureTime: mtime.Unix(),
|
||||
Value: 1.0,
|
||||
Source: "192_168_0_1.value1.value2",
|
||||
},
|
||||
nil,
|
||||
},
|
||||
{
|
||||
pt4,
|
||||
"hostname.tag2",
|
||||
&Gauge{
|
||||
Name: "test4",
|
||||
MeasureTime: mtime.Unix(),
|
||||
Value: 1.0,
|
||||
Source: "192_168_0_1.value2",
|
||||
},
|
||||
nil,
|
||||
},
|
||||
}
|
||||
|
||||
l := NewLibrato(fakeUrl)
|
||||
l.SourceTag = "hostname"
|
||||
l := NewLibrato(fakeURL)
|
||||
for _, gt := range gaugeTests {
|
||||
l.Template = gt.template
|
||||
gauges, err := l.buildGauges(gt.ptIn)
|
||||
if err != nil && gt.err == nil {
|
||||
t.Errorf("%s: unexpected error, %+v\n", gt.ptIn.Name(), err)
|
||||
}
|
||||
if gt.err != nil && err == nil {
|
||||
t.Errorf("%s: expected an error (%s) but none returned", gt.ptIn.Name(), gt.err.Error())
|
||||
t.Errorf(
|
||||
"%s: expected an error (%s) but none returned",
|
||||
gt.ptIn.Name(),
|
||||
gt.err.Error())
|
||||
}
|
||||
if len(gauges) == 0 {
|
||||
continue
|
||||
}
|
||||
if gt.err == nil && !reflect.DeepEqual(gauges[0], gt.outGauge) {
|
||||
t.Errorf("%s: \nexpected %+v\ngot %+v\n", gt.ptIn.Name(), gt.outGauge, gauges[0])
|
||||
t.Errorf(
|
||||
"%s: \nexpected %+v\ngot %+v\n",
|
||||
gt.ptIn.Name(),
|
||||
gt.outGauge, gauges[0])
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue