add warning log in aws and googlecloud module for API cost (elastic#2…

…0523)

x-pack/metricbeat/module/aws/aws.go

@@ -92,6 +92,7 @@ func NewMetricSet(base mb.BaseMetricSet) (*MetricSet, error) {
 
 	base.Logger().Debug("Metricset level config for period: ", metricSet.Period)
 	base.Logger().Debug("Metricset level config for tags filter: ", metricSet.TagsFilter)
+	base.Logger().Warn("extra charges on AWS API requests will be generated by this metricset")
 
 	// Get IAM account name, set region by aws_partition, default is aws global partition
 	// refer https://docs.aws.amazon.com/general/latest/gr/aws-arns-and-namespaces.html

x-pack/metricbeat/module/googlecloud/metrics/metricset.go

@@ -9,6 +9,8 @@ import (
 	"fmt"
 	"time"
 
+	"github.com/elastic/beats/v7/libbeat/logp"
+
 	monitoring "cloud.google.com/go/monitoring/apiv3"
 	"github.com/golang/protobuf/ptypes/duration"
 	"github.com/pkg/errors"
@@ -115,8 +117,9 @@ func New(base mb.BaseMetricSet) (mb.MetricSet, error) {
 	m.requester = &metricsRequester{
 		config: m.config,
 		client: client,
-		logger: m.Logger(),
+		logger: logp.NewLogger(MetricsetName),
 	}
+	m.Logger().Warn("extra charges on Google Cloud API requests will be generated by this metricset")
 	return m, nil
 }