Merge pull request kubernetes#89413 from zhouya0/remove_prometheus_references_from_etcd_version_monitor

Remove prometheus references from etcd version monitor

Author: k8s-ci-robot

cluster/images/etcd-version-monitor/BUILD

@@ -17,9 +17,9 @@ go_library(
     importpath = "k8s.io/kubernetes/cluster/images/etcd-version-monitor",
     deps = [
         "//staging/src/k8s.io/component-base/metrics:go_default_library",
+        "//staging/src/k8s.io/component-base/metrics/testutil:go_default_library",
         "//vendor/github.com/gogo/protobuf/proto:go_default_library",
         "//vendor/github.com/prometheus/client_model/go:go_default_library",
-        "//vendor/github.com/prometheus/common/expfmt:go_default_library",
         "//vendor/github.com/spf13/pflag:go_default_library",
         "//vendor/k8s.io/klog:go_default_library",
     ],

cluster/images/etcd-version-monitor/etcd-version-monitor.go

@@ -27,10 +27,10 @@ import (
 
 	"github.com/gogo/protobuf/proto"
 	dto "github.com/prometheus/client_model/go"
-	"github.com/prometheus/common/expfmt"
 	"github.com/spf13/pflag"
 
 	"k8s.io/component-base/metrics"
+	"k8s.io/component-base/metrics/testutil"
 	"k8s.io/klog"
 )
 
@@ -271,9 +271,7 @@ func scrapeMetrics() (map[string]*dto.MetricFamily, error) {
 	}
 	defer resp.Body.Close()
 
-	// Parse the metrics in text format to a MetricFamily struct.
-	var textParser expfmt.TextParser
-	return textParser.TextToMetricFamilies(resp.Body)
+	return testutil.TextToMetricFamilies(resp.Body)
 }
 
 func renameMetric(mf *dto.MetricFamily, name string) {

staging/src/k8s.io/component-base/metrics/testutil/metrics.go

@@ -92,6 +92,15 @@ func ParseMetrics(data string, output *Metrics) error {
 	}
 }
 
+// TextToMetricFamilies reads 'in' as the simple and flat text-based exchange
+// format and creates MetricFamily proto messages. It returns the MetricFamily
+// proto messages in a map where the metric names are the keys, along with any
+// error encountered.
+func TextToMetricFamilies(in io.Reader) (map[string]*dto.MetricFamily, error) {
+	var textParser expfmt.TextParser
+	return textParser.TextToMetricFamilies(in)
+}
+
 // ExtractMetricSamples parses the prometheus metric samples from the input string.
 func ExtractMetricSamples(metricsBlob string) ([]*model.Sample, error) {
 	dec := expfmt.NewDecoder(strings.NewReader(metricsBlob), expfmt.FmtText)