Provide scale-set listener metrics (#2559)

Co-authored-by: Tingluo Huang <tingluohuang@github.com>
Co-authored-by: Bassem Dghaidi <568794+Link-@users.noreply.github.com>

github/actions/types.go

@@ -55,14 +55,18 @@ type JobMessageType struct {
 
 type JobMessageBase struct {
 	JobMessageType
-	RunnerRequestId int64    `json:"runnerRequestId"`
-	RepositoryName  string   `json:"repositoryName"`
-	OwnerName       string   `json:"ownerName"`
-	JobWorkflowRef  string   `json:"jobWorkflowRef"`
-	JobDisplayName  string   `json:"jobDisplayName"`
-	WorkflowRunId   int64    `json:"workflowRunId"`
-	EventName       string   `json:"eventName"`
-	RequestLabels   []string `json:"requestLabels"`
+	RunnerRequestId    int64     `json:"runnerRequestId"`
+	RepositoryName     string    `json:"repositoryName"`
+	OwnerName          string    `json:"ownerName"`
+	JobWorkflowRef     string    `json:"jobWorkflowRef"`
+	JobDisplayName     string    `json:"jobDisplayName"`
+	WorkflowRunId      int64     `json:"workflowRunId"`
+	EventName          string    `json:"eventName"`
+	RequestLabels      []string  `json:"requestLabels"`
+	QueueTime          time.Time `json:"queueTime"`
+	ScaleSetAssignTime time.Time `json:"scaleSetAssignTime"`
+	RunnerAssignTime   time.Time `json:"runnerAssignTime"`
+	FinishTime         time.Time `json:"finishTime"`
 }
 
 type Label struct {

github/github.go

@@ -96,6 +96,8 @@ func (c *Config) NewClient() (*Client, error) {
 	metricsTransport := metrics.Transport{Transport: loggingTransport}
 	httpClient := &http.Client{Transport: metricsTransport}
 
+	metrics.Register()
+
 	var client *github.Client
 	var githubBaseURL string
 	var isEnterprise bool

github/metrics/transport.go

@@ -7,13 +7,18 @@ package metrics
 import (
 	"net/http"
 	"strconv"
+	"sync"
 
 	"github.com/prometheus/client_golang/prometheus"
 	"sigs.k8s.io/controller-runtime/pkg/metrics"
 )
 
-func init() {
-	metrics.Registry.MustRegister(metricRateLimit, metricRateLimitRemaining)
+var onceRegister sync.Once
+
+func Register() {
+	onceRegister.Do(func() {
+		metrics.Registry.MustRegister(metricRateLimit, metricRateLimitRemaining)
+	})
 }
 
 var (