Add a tool for grabbing and parsing prometheus metrics

2015-12-14 13:27:16 +01:00
parent 837a070d2f
commit 9dbbc4e1df
7 changed files with 732 additions and 0 deletions
--- a/pkg/metrics/api_server_metrics.go
+++ b/pkg/metrics/api_server_metrics.go
@@ -0,0 +1,77 @@
+/*
+Copyright 2015 The Kubernetes Authors All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package metrics
+
+import (
+	"k8s.io/kubernetes/pkg/util/sets"
+
+	"github.com/prometheus/common/model"
+)
+
+var KnownApiServerMetrics = map[string][]string{
+	"apiserver_request_count":                        {"verb", "resource", "client", "code"},
+	"apiserver_request_latencies_bucket":             {"verb", "resource", "le"},
+	"apiserver_request_latencies_count":              {"verb", "resource"},
+	"apiserver_request_latencies_sum":                {"verb", "resource"},
+	"apiserver_request_latencies_summary":            {"verb", "resource", "quantile"},
+	"apiserver_request_latencies_summary_count":      {"verb", "resource"},
+	"apiserver_request_latencies_summary_sum":        {"verb", "resource"},
+	"etcd_helper_cache_entry_count":                  {},
+	"etcd_helper_cache_hit_count":                    {},
+	"etcd_helper_cache_miss_count":                   {},
+	"etcd_request_cache_add_latencies_summary":       {"quantile"},
+	"etcd_request_cache_add_latencies_summary_count": {},
+	"etcd_request_cache_add_latencies_summary_sum":   {},
+	"etcd_request_cache_get_latencies_summary":       {"quantile"},
+	"etcd_request_cache_get_latencies_summary_count": {},
+	"etcd_request_cache_get_latencies_summary_sum":   {},
+	"etcd_request_latencies_summary":                 {"operation", "type", "quantile"},
+	"etcd_request_latencies_summary_count":           {"operation", "type"},
+	"etcd_request_latencies_summary_sum":             {"operation", "type"},
+	"get_token_count":                                {},
+	"get_token_fail_count":                           {},
+	"rest_client_request_latency_microseconds":       {"url", "verb", "quantile"},
+	"rest_client_request_latency_microseconds_count": {"url", "verb"},
+	"rest_client_request_latency_microseconds_sum":   {"url", "verb"},
+	"rest_client_request_status_codes":               {"code", "host", "method"},
+}
+
+type ApiServerMetrics Metrics
+
+func NewApiServerMetrics() ApiServerMetrics {
+	result := NewMetrics()
+	for metric := range KnownApiServerMetrics {
+		result[metric] = make(model.Samples, 0)
+	}
+	return ApiServerMetrics(result)
+}
+
+func parseApiServerMetrics(data string, unknownMetrics sets.String) (ApiServerMetrics, error) {
+	result := NewApiServerMetrics()
+	if err := parseMetrics(data, KnownApiServerMetrics, (*Metrics)(&result), unknownMetrics); err != nil {
+		return ApiServerMetrics{}, err
+	}
+	return result, nil
+}
+
+func (g *MetricsGrabber) getMetricsFromApiServer() (string, error) {
+	rawOutput, err := g.client.Get().RequestURI("/metrics").Do().Raw()
+	if err != nil {
+		return "", err
+	}
+	return string(rawOutput), nil
+}