shishengliang/lingniu-vehicle-ingest
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feat(go): expose kafka consumer lag metrics

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lingniu
2026-07-02 19:23:01 +08:00
parent 41ff0bcef4
commit 1f4a23ff69
9 changed files with 63 additions and 3 deletions
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8
go/vehicle-gateway/cmd/stat-writer/main.go
View File

@@ -90,6 +90,7 @@ func processStatMessage(ctx context.Context, logger interface {
defer cancel()
addStatMetric(registry, "vehicle_stat_kafka_messages_total", message, "received")
addStatLagMetric(registry, message)
var env envelope.FrameEnvelope
if err := json.Unmarshal(message.Value, &env); err != nil {
addStatMetric(registry, "vehicle_stat_kafka_messages_total", message, "invalid_json")
@@ -118,6 +119,13 @@ func addStatMetric(registry *metrics.Registry, name string, message kafka.Messag
registry.IncCounter(name, metrics.Labels{"topic": message.Topic, "status": status})
}
func addStatLagMetric(registry *metrics.Registry, message kafka.Message) {
if registry == nil {
return
}
registry.SetKafkaLag("vehicle_stat_kafka_lag", message.Topic, message.Partition, message.Offset, message.HighWaterMark)
}
type config struct {
KafkaBrokers []string
KafkaTopics []string

3
go/vehicle-gateway/cmd/stat-writer/main_test.go
View File

@@ -58,7 +58,7 @@ func TestProcessStatMessageRecordsMetrics(t *testing.T) {
registry,
&contextCheckingStatAppender{},
&contextCheckingStatCommitter{},
kafka.Message{Topic: "vehicle.raw.jt808.v1", Value: payload},
kafka.Message{Topic: "vehicle.raw.jt808.v1", Partition: 4, Offset: 30, HighWaterMark: 41, Value: payload},
)
text := registry.Render()
@@ -66,6 +66,7 @@ func TestProcessStatMessageRecordsMetrics(t *testing.T) {
`vehicle_stat_kafka_messages_total{status="received",topic="vehicle.raw.jt808.v1"} 1`,
`vehicle_stat_writes_total{status="ok",topic="vehicle.raw.jt808.v1"} 1`,
`vehicle_stat_kafka_commits_total{status="ok",topic="vehicle.raw.jt808.v1"} 1`,
`vehicle_stat_kafka_lag{partition="4",topic="vehicle.raw.jt808.v1"} 10`,
} {
if !strings.Contains(text, want) {
t.Fatalf("metrics missing %s:\n%s", want, text)