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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,93 @@ | ||
| package metrics | ||
|
|
||
| import ( | ||
| "context" | ||
| "sync" | ||
| "time" | ||
|
|
||
| "github.com/aws/aws-sdk-go-v2/service/cloudwatch" | ||
| "github.com/aws/aws-sdk-go-v2/service/cloudwatch/types" | ||
| "github.com/aws/aws-sdk-go/aws" | ||
| "k8s.io/klog" | ||
| ) | ||
|
|
||
| // NewCloudWatchRegistry creates a new metric registry that will emit values using the specified cloudwatch client | ||
| func NewCloudWatchRegistry(cw *cloudwatch.Client) MetricRegistry { | ||
| return &cloudwatchRegistry{ | ||
| cw: cw, | ||
| lock: &sync.Mutex{}, | ||
| dataByNamespace: make(map[string][]*cloudwatchMetricDatum), | ||
| } | ||
| } | ||
|
|
||
| type cloudwatchRegistry struct { | ||
| cw *cloudwatch.Client | ||
| lock *sync.Mutex | ||
| dataByNamespace map[string][]*cloudwatchMetricDatum | ||
| } | ||
|
|
||
| type cloudwatchMetricDatum struct { | ||
| spec *MetricSpec | ||
| value float64 | ||
| dimensions map[string]string | ||
| timestamp time.Time | ||
| } | ||
|
|
||
| func (r *cloudwatchRegistry) Record(spec *MetricSpec, value float64, dimensions map[string]string) { | ||
| r.lock.Lock() | ||
| defer r.lock.Unlock() | ||
| r.dataByNamespace[spec.Namespace] = append(r.dataByNamespace[spec.Namespace], &cloudwatchMetricDatum{ | ||
| spec: spec, | ||
| value: value, | ||
| dimensions: dimensions, | ||
| timestamp: time.Now(), | ||
| }) | ||
| } | ||
|
|
||
| func (r *cloudwatchRegistry) Emit() error { | ||
| r.lock.Lock() | ||
| defer r.lock.Unlock() | ||
| for namespace, data := range r.dataByNamespace { | ||
| for i := 0; i < len(data); { | ||
| var metricData []types.MetricDatum | ||
| // we can emit up to 1000 values per PutMetricData | ||
| for j := 0; j < 1000; j++ { | ||
| datum := data[i] | ||
| var dimensions []types.Dimension | ||
| for key, val := range datum.dimensions { | ||
| dimensions = append(dimensions, types.Dimension{ | ||
| Name: aws.String(key), | ||
| Value: aws.String(val), | ||
| }) | ||
| } | ||
| metricData = append(metricData, types.MetricDatum{ | ||
| MetricName: aws.String(datum.spec.Metric), | ||
| Value: aws.Float64(datum.value), | ||
| Dimensions: dimensions, | ||
| Timestamp: &datum.timestamp, | ||
| }) | ||
| i++ | ||
| } | ||
| _, err := r.cw.PutMetricData(context.TODO(), &cloudwatch.PutMetricDataInput{ | ||
| Namespace: aws.String(namespace), | ||
| MetricData: metricData, | ||
| }) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| } | ||
| klog.Infof("emitted %d metrics to namespace: %s", len(data), namespace) | ||
| } | ||
| r.dataByNamespace = make(map[string][]*cloudwatchMetricDatum) | ||
| return nil | ||
| } | ||
|
|
||
| func (r *cloudwatchRegistry) GetRegistered() int { | ||
| r.lock.Lock() | ||
| defer r.lock.Unlock() | ||
| registered := 0 | ||
| for _, data := range r.dataByNamespace { | ||
| registered += len(data) | ||
| } | ||
| return registered | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,13 @@ | ||
| package metrics | ||
|
|
||
| func NewNoopMetricRegistry() MetricRegistry { | ||
| return &noopRegistry{} | ||
| } | ||
|
|
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| type noopRegistry struct{} | ||
|
|
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| func (r *noopRegistry) Record(spec *MetricSpec, value float64, dimensions map[string]string) {} | ||
|
|
||
| func (r *noopRegistry) Emit() error { | ||
| return nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,18 @@ | ||
| package metrics | ||
|
|
||
| import ( | ||
| "github.com/aws/aws-sdk-go-v2/service/cloudwatch/types" | ||
| ) | ||
|
|
||
| type MetricRegistry interface { | ||
| // Record adds a new metric value to the registry | ||
| Record(spec *MetricSpec, value float64, dimensions map[string]string) | ||
| // Emit sends all registered metric values to cloudwatch, emptying the registry | ||
| Emit() error | ||
| } | ||
|
|
||
| type MetricSpec struct { | ||
| Namespace string | ||
| Metric string | ||
| Unit types.StandardUnit | ||
| } |
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