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plugin/metrics: Add a metric to monitor which plugin(s) is(are) enabled (#2700)

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* Add a GaugeVec for enabled plugins monitoring.

Signed-off-by: Jiacheng Xu <xjcmaxwellcjx@gmail.com>

* Add server label and zone label for enable_plugin matric.

* Add a test for PluginEnabled metric

* Add description for enabledPlugin metric.

* Change the description for the enabledPlugin metric.

* Reset the enabledPlugin metric when restart the server.

* Add the bug session for enabledPlugin metric.

* Remove the resolveTCPAddr
This commit is contained in:
Jiacheng Xu
2019-03-23 10:43:15 +01:00
committed by Miek Gieben
parent a3dd8cdf8d
commit 0e137b23f1
5 changed files with 63 additions and 0 deletions
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36
test/metrics_test.go
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@@ -186,3 +186,39 @@ google.com:0 {
t.Errorf("Expected metric data retrieved for %s, expected %d, got %d", cacheSizeMetricName, 1, endCacheSize-beginCacheSize)
}
}
func TestMetricsPluginEnabled(t *testing.T) {
corefile := `example.org:0 {
chaos CoreDNS-001 miek@miek.nl
prometheus localhost:0
}
example.com:0 {
forward . 8.8.4.4:53
prometheus localhost:0
}
`
srv, err := CoreDNSServer(corefile)
if err != nil {
t.Fatalf("Could not get CoreDNS serving instance: %s", err)
}
defer srv.Stop()
metricName := "coredns_plugin_enabled" //{server, zone, name}
data := test.Scrape("http://" + metrics.ListenAddr + "/metrics")
// Get the value for the metrics where the one of the labels values matches "chaos".
got, _ := test.MetricValueLabel(metricName, "chaos", data)
if got != "1" {
t.Errorf("Expected value %s for %s, but got %s", "1", metricName, got)
}
// Get the value for the metrics where the one of the labels values matches "whoami".
got, _ = test.MetricValueLabel(metricName, "whoami", data)
if got != "" {
t.Errorf("Expected value %s for %s, but got %s", "", metricName, got)
}
}