prometheus

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// Copyright 2015 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package consul
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import (
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	"github.com/prometheus/client_golang/prometheus"
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	"github.com/prometheus/prometheus/discovery"
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)
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var _ discovery.DiscovererMetrics = (*consulMetrics)(nil)
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type consulMetrics struct {
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	rpcFailuresCount prometheus.Counter
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	rpcDuration      *prometheus.SummaryVec
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	servicesRPCDuration prometheus.Observer
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	serviceRPCDuration  prometheus.Observer
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	metricRegisterer discovery.MetricRegisterer
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}
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func newDiscovererMetrics(reg prometheus.Registerer, rmi discovery.RefreshMetricsInstantiator) discovery.DiscovererMetrics {
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	m := &consulMetrics{
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		rpcFailuresCount: prometheus.NewCounter(
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			prometheus.CounterOpts{
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				Namespace: namespace,
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				Name:      "sd_consul_rpc_failures_total",
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				Help:      "The number of Consul RPC call failures.",
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			}),
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		rpcDuration: prometheus.NewSummaryVec(
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			prometheus.SummaryOpts{
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				Namespace:  namespace,
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				Name:       "sd_consul_rpc_duration_seconds",
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				Help:       "The duration of a Consul RPC call in seconds.",
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				Objectives: map[float64]float64{0.5: 0.05, 0.9: 0.01, 0.99: 0.001},
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			},
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			[]string{"endpoint", "call"},
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		),
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	}
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	m.metricRegisterer = discovery.NewMetricRegisterer(reg, []prometheus.Collector{
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		m.rpcFailuresCount,
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		m.rpcDuration,
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	})
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	// Initialize metric vectors.
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	m.servicesRPCDuration = m.rpcDuration.WithLabelValues("catalog", "services")
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	m.serviceRPCDuration = m.rpcDuration.WithLabelValues("catalog", "service")
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	return m
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}
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// Register implements discovery.DiscovererMetrics.
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func (m *consulMetrics) Register() error {
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	return m.metricRegisterer.RegisterMetrics()
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}
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// Unregister implements discovery.DiscovererMetrics.
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func (m *consulMetrics) Unregister() {
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	m.metricRegisterer.UnregisterMetrics()
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}
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