Added support to override metric_url in newrelic output plugin (#9342)

plugins/outputs/newrelic/README.md

@@ -21,6 +21,10 @@ Telegraf minimum version: Telegraf 1.15.0
   ## HTTP Proxy override. If unset use values from the standard
   ## proxy environment variables to determine proxy, if any.
   # http_proxy = "http://corporate.proxy:3128"
+
+  ## Metric URL override to enable geographic location endpoints.
+  # If not set use values from the standard 
+  # metric_url = "https://metric-api.newrelic.com/metric/v1"
 ```
 
 [Metrics API]: https://docs.newrelic.com/docs/data-ingest-apis/get-data-new-relic/metric-api/introduction-metric-api

plugins/outputs/newrelic/newrelic.go

@@ -21,6 +21,7 @@ type NewRelic struct {
 	MetricPrefix string          `toml:"metric_prefix"`
 	Timeout      config.Duration `toml:"timeout"`
 	HTTPProxy    string          `toml:"http_proxy"`
+	MetricURL    string          `toml:"metric_url"`
 
 	harvestor   *telemetry.Harvester
 	dc          *cumulative.DeltaCalculator
@@ -49,6 +50,10 @@ func (nr *NewRelic) SampleConfig() string {
   ## HTTP Proxy override. If unset use values from the standard
   ## proxy environment variables to determine proxy, if any.
   # http_proxy = "http://corporate.proxy:3128"
+
+  ## Metric URL override to enable geographic location endpoints.
+  # If not set use values from the standard 
+  # metric_url = "https://metric-api.newrelic.com/metric/v1"
 `
 }
 
@@ -77,6 +82,9 @@ func (nr *NewRelic) Connect() error {
 				nr.errorCount++
 				nr.savedErrors[nr.errorCount] = errorString
 			}
+			if nr.MetricURL != "" {
+				cfg.MetricsURLOverride = nr.MetricURL
+			}
 		})
 	if err != nil {
 		return fmt.Errorf("unable to connect to newrelic %v", err)

plugins/outputs/newrelic/newrelic_test.go

@@ -173,6 +173,14 @@ func TestNewRelic_Connect(t *testing.T) {
 			},
 			wantErr: false,
 		},
+		{
+			name: "Test: Metric URL ",
+			newrelic: &NewRelic{
+				InsightsKey: "12121212",
+				MetricURL:   "https://test.nr.com",
+			},
+			wantErr: false,
+		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {