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lambda-promtail: Add support for Kinesis data stream events (#5977)
**What this PR does / why we need it**: This PR adds support for sending Kinesis data stream events to lambda-promtail. One use case would be e.g. to send CloudFront realtime logs to Loki. **Which issue(s) this PR fixes**: Fixes #5978 **Special notes for your reviewer**: n/a **Checklist** - [x] Documentation added - [x] Tests updated - [x] Is this an important fix or new feature? Add an entry in the `CHANGELOG.md`. - [ ] Changes that require user attention or interaction to upgrade are documented in `docs/sources/upgrading/_index.md`
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,49 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "context" | ||
| "time" | ||
|
|
||
| "github.com/aws/aws-lambda-go/events" | ||
| "github.com/grafana/loki/pkg/logproto" | ||
| "github.com/prometheus/common/model" | ||
| ) | ||
|
|
||
| func parseKinesisEvent(ctx context.Context, b batchIf, ev *events.KinesisEvent) error { | ||
| if ev == nil { | ||
| return nil | ||
| } | ||
|
|
||
| for _, record := range ev.Records { | ||
| timestamp := time.UnixMilli(record.Kinesis.ApproximateArrivalTimestamp.Unix()) | ||
|
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| labels := model.LabelSet{ | ||
| model.LabelName("__aws_log_type"): model.LabelValue("kinesis"), | ||
| model.LabelName("__aws_kinesis_event_source_arn"): model.LabelValue(record.EventSourceArn), | ||
| } | ||
|
|
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| labels = applyExtraLabels(labels) | ||
|
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| b.add(ctx, entry{labels, logproto.Entry{ | ||
| Line: string(record.Kinesis.Data), | ||
| Timestamp: timestamp, | ||
| }}) | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
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| func processKinesisEvent(ctx context.Context, ev *events.KinesisEvent) error { | ||
| batch, _ := newBatch(ctx) | ||
|
|
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| err := parseKinesisEvent(ctx, batch, ev) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| err = sendToPromtail(ctx, batch) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| return nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "context" | ||
| "encoding/json" | ||
| "io/ioutil" | ||
| "testing" | ||
|
|
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| "github.com/aws/aws-lambda-go/events" | ||
| "github.com/grafana/loki/pkg/logproto" | ||
| "github.com/stretchr/testify/require" | ||
| ) | ||
|
|
||
| type MockBatch struct { | ||
| streams map[string]*logproto.Stream | ||
| size int | ||
| } | ||
|
|
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| func (b *MockBatch) add(ctx context.Context, e entry) error { | ||
| b.streams[e.labels.String()] = &logproto.Stream{ | ||
| Labels: e.labels.String(), | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func (b *MockBatch) flushBatch(ctx context.Context) error { | ||
| return nil | ||
| } | ||
| func (b *MockBatch) encode() ([]byte, int, error) { | ||
| return nil, 0, nil | ||
| } | ||
| func (b *MockBatch) createPushRequest() (*logproto.PushRequest, int) { | ||
| return nil, 0 | ||
| } | ||
|
|
||
| func ReadJSONFromFile(t *testing.T, inputFile string) []byte { | ||
| inputJSON, err := ioutil.ReadFile(inputFile) | ||
| if err != nil { | ||
| t.Errorf("could not open test file. details: %v", err) | ||
| } | ||
|
|
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| return inputJSON | ||
| } | ||
|
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| func TestLambdaPromtail_KinesisParseEvents(t *testing.T) { | ||
| inputJson, err := ioutil.ReadFile("../testdata/kinesis-event.json") | ||
|
|
||
| if err != nil { | ||
| t.Errorf("could not open test file. details: %v", err) | ||
| } | ||
|
|
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| var testEvent events.KinesisEvent | ||
| if err := json.Unmarshal(inputJson, &testEvent); err != nil { | ||
| t.Errorf("could not unmarshal event. details: %v", err) | ||
| } | ||
|
|
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| ctx := context.TODO() | ||
| b := &MockBatch{ | ||
| streams: map[string]*logproto.Stream{}, | ||
| } | ||
|
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| err = parseKinesisEvent(ctx, b, &testEvent) | ||
| require.Nil(t, err) | ||
|
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| labels_str := "{__aws_kinesis_event_source_arn=\"arn:aws:kinesis:us-east-1:123456789012:stream/simple-stream\", __aws_log_type=\"kinesis\"}" | ||
| require.Contains(t, b.streams, labels_str) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,36 @@ | ||
| { | ||
| "Records": [ | ||
| { | ||
| "kinesis": { | ||
| "kinesisSchemaVersion": "1.0", | ||
| "partitionKey": "s1", | ||
| "sequenceNumber": "49568167373333333333333333333333333333333333333333333333", | ||
| "data": "SGVsbG8gV29ybGQ=", | ||
| "approximateArrivalTimestamp": 1480641523.477 | ||
| }, | ||
| "eventSource": "aws:kinesis", | ||
| "eventVersion": "1.0", | ||
| "eventID": "shardId-000000000000:49568167373333333333333333333333333333333333333333333333", | ||
| "eventName": "aws:kinesis:record", | ||
| "invokeIdentityArn": "arn:aws:iam::123456789012:role/LambdaRole", | ||
| "awsRegion": "us-east-1", | ||
| "eventSourceARN": "arn:aws:kinesis:us-east-1:123456789012:stream/simple-stream" | ||
| }, | ||
| { | ||
| "kinesis": { | ||
| "kinesisSchemaVersion": "1.0", | ||
| "partitionKey": "s1", | ||
| "sequenceNumber": "49568167373333333334444444444444444444444444444444444444", | ||
| "data": "SGVsbG8gV29ybGQ=", | ||
| "approximateArrivalTimestamp": 1480841523.477 | ||
| }, | ||
| "eventSource": "aws:kinesis", | ||
| "eventVersion": "1.0", | ||
| "eventID": "shardId-000000000000:49568167373333333334444444444444444444444444444444444444", | ||
| "eventName": "aws:kinesis:record", | ||
| "invokeIdentityArn": "arn:aws:iam::123456789012:role/LambdaRole", | ||
| "awsRegion": "us-east-1", | ||
| "eventSourceARN": "arn:aws:kinesis:us-east-1:123456789012:stream/simple-stream" | ||
| } | ||
| ] | ||
| } |