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🚀 Add a new manager option -- list-metrics #651

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🚀 Add a new manager option -- list-metrics #651

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f2c0208
Add a new manager option -- list-metrics
arybolovlev Oct 27, 2025
06ae9e0
Merge branch 'main' into add-list-metrics-option
arybolovlev Oct 29, 2025
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10 changes: 10 additions & 0 deletions cmd/main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -64,6 +64,8 @@ func main() {
flag.Var(&watchNamespaces, "namespace", "Namespace to watch")
var opVersion bool
flag.BoolVar(&opVersion, "version", false, "Print operator version")
var metricsList bool
flag.BoolVar(&metricsList, "list-metrics", false, "List operator metrics")
// AGENT POOL CONTROLLER OPTIONS
var agentPoolWorkers int
flag.IntVar(&agentPoolWorkers, "agent-pool-workers", 1,
Expand Down Expand Up @@ -112,6 +114,14 @@ func main() {
os.Exit(0)
}

if metricsList {
if err := controller.ListHCPTMetrics(); err != nil {
fmt.Println("Failed to list metrics:", err)
os.Exit(1)
}
os.Exit(0)
}

zapConfig := zap.NewProductionConfig()
zapConfig.EncoderConfig.EncodeLevel = zapcore.CapitalLevelEncoder
zapConfig.EncoderConfig.EncodeTime = zapcore.RFC3339TimeEncoder
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25 changes: 25 additions & 0 deletions internal/controller/metrics.go
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Expand Up @@ -4,6 +4,9 @@
package controller

import (
"fmt"
"strings"

"github.com/prometheus/client_golang/prometheus"
"sigs.k8s.io/controller-runtime/pkg/metrics"
)
Expand Down Expand Up @@ -45,4 +48,26 @@ func RegisterMetrics() {
metricRuns,
metricRunsTotal,
)
// Initialize all run status metrics to 0.
for _, s := range runStatuses {
metricRuns.WithLabelValues(string(s)).Set(0)
}
// Initialize total runs metric to 0.
metricRunsTotal.WithLabelValues().Set(0)
}

func ListHCPTMetrics() error {
mfs, err := metrics.Registry.Gather()
if err != nil {
return err
}
for _, mf := range mfs {
name := mf.GetName()
if strings.HasPrefix(name, "hcp_tf") {
fmt.Printf("# HELP %s %s\n", name, mf.GetHelp())
fmt.Printf("# TYPE %s %s\n", name, mf.Type.String())
}
}

return nil
}
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