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added metric constructors

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This commit is contained in:
Philipp Mieden 2019-05-23 16:33:01 +02:00
parent 647853292b
commit 33364e3af8
1 changed files with 70 additions and 80 deletions
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150
status/metrics.go
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@ -5,7 +5,7 @@ import (
)
// M is the Metrics instance
var M = NewMetrics()
var M = newMetrics()
const (
namespace = "contentserver"
@ -17,6 +17,7 @@ const (
metricLabelError = "error"
)
// Metrics is the structure that holds all prometheus metrics
type Metrics struct {
ServiceRequestCounter *prometheus.CounterVec // count the number of requests for each service function
ServiceRequestDuration *prometheus.SummaryVec // observe the duration of requests for each service function
@ -28,96 +29,85 @@ type Metrics struct {
NumSocketsGauge *prometheus.GaugeVec // keep track of the total number of open sockets
}
func NewMetrics() *Metrics {
// newMetrics can be used to instantiate a metrics instance
// since this function will also register each metric and metrics should only be registered once
// it is private
// the package exposes the initialized Metrics instance as the variable M.
func newMetrics() *Metrics {
return &Metrics{
ServiceRequestCounter: serviceRequestCounter(),
ServiceRequestDuration: serviceRequestDuration(),
UpdatesRejectedCounter: updatesRejectedCounter(),
UpdatesCompletedCounter: updatesCompletedCounter(),
UpdatesFailedCounter: updatesFailedCounter(),
UpdateDuration: updateDuration(),
ContentRequestCounter: contentRequestCounter(),
NumSocketsGauge: numSocketsGauge(),
ServiceRequestCounter: newCounterVec(
"service_request_count",
"Count of requests for each handler",
metricLabelHandler, metricLabelStatus, metricLabelSource,
),
ServiceRequestDuration: newSummaryVec(
"service_request_duration_seconds",
"Seconds to unmarshal requests, execute a service function and marshal its reponses",
metricLabelHandler, metricLabelStatus, metricLabelSource,
),
UpdatesRejectedCounter: newCounterVec(
"updates_rejected_count",
"Number of updates that were rejected because the queue was full",
),
UpdatesCompletedCounter: newCounterVec(
"updates_completed_count",
"Number of updates that were successfully completed",
),
UpdatesFailedCounter: newCounterVec(
"updates_failed_count",
"Number of updates that failed due to an error",
metricLabelError,
),
UpdateDuration: newSummaryVec(
"update_duration_seconds",
"Duration in seconds for each successful repo.update() call",
),
ContentRequestCounter: newCounterVec(
"num_sockets_total",
"Total number of currently open socket connections",
metricLabelRemote,
),
NumSocketsGauge: newGaugeVec(
"content_request_count",
"Number of requests for content",
metricLabelSource,
),
}
}
func serviceRequestCounter() *prometheus.CounterVec {
/*
* Metric constructors
*/
func newSummaryVec(name, help string, labels ...string) *prometheus.SummaryVec {
vec := prometheus.NewSummaryVec(
prometheus.SummaryOpts{
Namespace: namespace,
Name: name,
Help: help,
}, labels)
prometheus.MustRegister(vec)
return vec
}
func newCounterVec(name, help string, labels ...string) *prometheus.CounterVec {
vec := prometheus.NewCounterVec(
prometheus.CounterOpts{
Namespace: namespace,
Name: "service_request_count",
Help: "Count of requests for each handler",
}, []string{metricLabelHandler, metricLabelStatus, metricLabelSource})
Name: name,
Help: help,
}, labels)
prometheus.MustRegister(vec)
return vec
}
func serviceRequestDuration() *prometheus.SummaryVec {
vec := prometheus.NewSummaryVec(prometheus.SummaryOpts{
Namespace: namespace,
Name: "service_request_duration_seconds",
Help: "Seconds to unmarshal requests, execute a service function and marshal its reponses",
}, []string{metricLabelHandler, metricLabelStatus, metricLabelSource})
prometheus.MustRegister(vec)
return vec
}
func updatesRejectedCounter() *prometheus.CounterVec {
vec := prometheus.NewCounterVec(prometheus.CounterOpts{
Namespace: namespace,
Name: "updates_rejected_count",
Help: "Number of updates that were rejected because the queue was full",
}, []string{})
prometheus.MustRegister(vec)
return vec
}
func updatesCompletedCounter() *prometheus.CounterVec {
vec := prometheus.NewCounterVec(prometheus.CounterOpts{
Namespace: namespace,
Name: "updates_completed_count",
Help: "Number of updates that were successfully completed",
}, []string{})
prometheus.MustRegister(vec)
return vec
}
func updatesFailedCounter() *prometheus.CounterVec {
vec := prometheus.NewCounterVec(prometheus.CounterOpts{
Namespace: namespace,
Name: "updates_failed_count",
Help: "Number of updates that failed due to an error",
}, []string{metricLabelError})
prometheus.MustRegister(vec)
return vec
}
func updateDuration() *prometheus.SummaryVec {
vec := prometheus.NewSummaryVec(prometheus.SummaryOpts{
Namespace: namespace,
Name: "update_duration_seconds",
Help: "Duration in seconds for each successful repo.update() call",
}, []string{})
prometheus.MustRegister(vec)
return vec
}
func numSocketsGauge() *prometheus.GaugeVec {
vec := prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: namespace,
Name: "num_sockets_total",
Help: "Total number of currently open socket connections",
}, []string{metricLabelRemote})
prometheus.MustRegister(vec)
return vec
}
func contentRequestCounter() *prometheus.CounterVec {
vec := prometheus.NewCounterVec(prometheus.CounterOpts{
Namespace: namespace,
Name: "content_request_count",
Help: "Number of requests for content",
}, []string{metricLabelSource})
func newGaugeVec(name, help string, labels ...string) *prometheus.GaugeVec {
vec := prometheus.NewGaugeVec(
prometheus.GaugeOpts{
Namespace: namespace,
Name: name,
Help: help,
}, labels)
prometheus.MustRegister(vec)
return vec
}