Allow Accept header to be customized

go.mod

@@ -0,0 +1,11 @@
+module prometheus_to_cloudwatch
+
+go 1.13
+
+require (
+	github.com/aws/aws-sdk-go v1.29.32
+	github.com/gobwas/glob v0.2.3
+	github.com/matttproud/golang_protobuf_extensions v1.0.1
+	github.com/prometheus/client_model v0.2.0
+	github.com/prometheus/common v0.9.1
+)

go.sum

@@ -0,0 +1,81 @@
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main.go

@@ -36,6 +36,7 @@ var (
 	includeDimensionsForMetrics = flag.String("include_dimensions_for_metrics", os.Getenv("INCLUDE_DIMENSIONS_FOR_METRICS"), "Only publish the specified dimensions for metrics (semi-colon-separated key values of comma-separated dimensions of METRIC=dim1,dim2;, e.g. 'flink_jobmanager=job_id')")
 	excludeDimensionsForMetrics = flag.String("exclude_dimensions_for_metrics", os.Getenv("EXCLUDE_DIMENSIONS_FOR_METRICS"), "Never publish the specified dimensions for metrics (semi-colon-separated key values of comma-separated dimensions of METRIC=dim1,dim2;, e.g. 'flink_jobmanager=job,host;zk_up=host,pod;')")
 	forceHighRes                = flag.Bool("force_high_res", defaultForceHighRes, "Publish all metrics with high resolution, even when original metrics don't have the label "+cwHighResLabel)
+	acceptHeaderOverride        = flag.String("accept_header", os.Getenv("ACCEPT_HEADER"), "Accept header used when retrieving metrics")
 )
 
 // kevValMustParse takes a string and exits with a message if it cannot parse as KEY=VALUE

prometheus_to_cloudwatch.go

@@ -241,7 +241,7 @@ func (b *Bridge) publishMetricsToCloudWatch(mfs []*dto.MetricFamily) (count int,
 
 	for _, s := range vec {
 		name := getName(s.Metric)
-		if b.shouldIgnoreMetric(name) {
+		if b.shouldIgnoreMetric(name, s) {
 			continue
 		}
 		data = appendDatum(data, name, s, b)
@@ -291,13 +291,40 @@ func compressPayload(r *request.Request) {
 	r.HTTPRequest.Header.Set("Content-Encoding", "gzip")
 }
 
-func (b *Bridge) shouldIgnoreMetric(metricName string) bool {
+func (b *Bridge) shouldIgnoreMetric(metricName string, sample *model.Sample) bool {
 	// Blacklist takes priority over the whitelist
 	if anyPatternMatches(b.excludeMetrics, metricName) {
 		return true
 	} else if len(b.includeMetrics) == 0 {
 		return false
 	} else if anyPatternMatches(b.includeMetrics, metricName) {
+		if b.includeDimensionsForMetrics != nil && len(b.includeDimensionsForMetrics) > 0 {
+			for _, d := range b.excludeDimensionsForMetrics {
+				for dimName, dimValue := range sample.Metric {
+					if dimName == model.MetricNameLabel || dimName == cwHighResLabel || dimName == cwUnitLabel {
+						continue
+					}
+					if d.Matcher.Match(string(dimName)) {
+						if d.Set[string(dimValue)] {
+							return true
+						}
+					}
+				}
+			}
+			for _, d := range b.includeDimensionsForMetrics {
+				for dimName, dimValue := range sample.Metric {
+					if dimName == model.MetricNameLabel || dimName == cwHighResLabel || dimName == cwUnitLabel {
+						continue
+					}
+					if d.Matcher.Match(string(dimName)) {
+						if d.Set[string(dimValue)] {
+							return false
+						}
+					}
+				}
+			}
+			return true
+		}
 		return false
 	}
 	return true
@@ -521,7 +548,15 @@ func decodeContent(client *http.Client, url string, ch chan<- *dto.MetricFamily)
 	if err != nil {
 		log.Fatalf("prometheus-to-cloudwatch: Error: creating GET request for URL %q failed: %s", url, err)
 	}
-	req.Header.Add("Accept", acceptHeader)
+
+	var ah string
+	if acceptHeaderOverride != nil && *acceptHeaderOverride != "" {
+		ah = *acceptHeaderOverride
+	} else {
+		ah = acceptHeader
+	}
+	req.Header.Add("Accept", ah)
+
 	resp, err := client.Do(req)
 	if err != nil {
 		log.Fatalf("prometheus-to-cloudwatch: Error: executing GET request for URL %q failed: %s", url, err)