/
s3.go
199 lines (182 loc) · 5.65 KB
/
s3.go
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package aws
import (
"bufio"
"compress/gzip"
"context"
"strings"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/service/s3"
"github.com/aws/aws-sdk-go/service/sqs"
)
/**
{"Records":[{"eventVersion":"2.1","eventSource":"aws:s3","awsRegion":"us-west-2","eventTime":"2020-09-17T18:24:24.619Z","eventName":"ObjectCreated:Put","userIdentity":{"principalId":"AWS:AROAV2CJ256E23ZOBRSAF:prod.pdx.dbs.datafeeds.aws.internal"},"requestParameters":{"sourceIPAddress":"172.19.15.211"},"responseElements":{"x-amz-request-id":"AD5D47CDA09091B3","x-amz-id-2":"gMLgqszXsmKN41Ou3/l330BEXa+ARrbIP8UkW9VqW21WdC42ie4Ki1WMP5Zm8M6R1TuAgkjPJFtlFB2HX+Ui3yeNqrJ5oBz0"},"s3":{"s3SchemaVersion":"1.0","configurationId":"Flow","bucket":{"name":"kentik-test-orangeflow","ownerIdentity":{"principalId":"A2L4QHGC7GJYP3"},"arn":"arn:aws:s3:::kentik-test-orangeflow"},"object":{"key":"AWSLogs/451031991406/vpcflowlogs/us-west-2/2020/09/17/451031991406_vpcflowlogs_us-west-2_fl-0ac5de8260cdc0575_20200917T1820Z_c127bbf5.log.gz","size":1797,"eTag":"1638e127fe977dacb06958f144f0b549","sequencer":"005F63A9DAF94F4D9E"}}}]}
*/
type SQSEvent struct {
Records []SQSRecord `json:"Records"`
}
type SQSRecord struct {
EventName string `json:"eventName"`
S3 SQSS3 `json:"s3"`
}
type SQSS3 struct {
Bucket SQSBucket `json:"bucket"`
Object SQSObject `json:"object"`
}
type SQSBucket struct {
Name string `json:"name"`
}
type SQSObject struct {
Key string `json:"key"`
}
func (vpc *AwsVpc) processObject(bucket string, mdata *s3.Object) error {
vpc.Debugf("Processing %s %s", bucket, *mdata.Key)
input := &s3.GetObjectInput{
Bucket: aws.String(bucket),
Key: mdata.Key,
}
res := make([]*AWSLogLine, 0)
size := int64(0)
scanBuf := make([]byte, 1024*1024)
result, err := vpc.client.GetObject(input)
if err != nil {
vpc.Errorf("Cannot process object: %s %s -> %v", bucket, *mdata.Key, err)
return err
} else {
if result.ContentLength != nil {
size = *result.ContentLength
}
zr, err := gzip.NewReader(result.Body)
if err != nil {
if !strings.HasSuffix(*mdata.Key, ".gz") {
// if possibly not gz encoded, try looping directly.
scanner := bufio.NewScanner(result.Body)
if size > bufio.MaxScanTokenSize {
scanner.Buffer(scanBuf, len(scanBuf)*1024)
}
lineMap := AwsLineMap{}
for scanner.Scan() {
rawLine := scanner.Text()
lines, lineMapOut, err := NewAws(lineMap, &rawLine, vpc)
if err != nil {
// weird case here so just skip.
if len(rawLine) > 80 {
vpc.Errorf("Error A reading line: %v -> %s", err, rawLine[0:80])
} else {
vpc.Errorf("Error A reading line: %v -> %s", err, rawLine)
}
} else {
if lineMapOut != nil {
lineMap = lineMapOut
}
if lines != nil {
res = append(res, lines...)
}
}
}
if err := scanner.Err(); err != nil {
vpc.Warnf("Could not scan %s %s: %v.", bucket, *mdata.Key, err)
return err
}
} else { // Can't un-gzip here.
vpc.Warnf("Could not gz %s %s: %v.", bucket, *mdata.Key, err)
return err
}
} else {
scanner := bufio.NewScanner(zr)
if size > bufio.MaxScanTokenSize {
scanner.Buffer(scanBuf, len(scanBuf)*1024)
}
lineMap := AwsLineMap{}
for scanner.Scan() {
rawLine := scanner.Text()
lines, lineMapOut, err := NewAws(lineMap, &rawLine, vpc)
if err != nil {
if len(rawLine) > 80 {
vpc.Errorf("Error reading line: %v -> %s", err, rawLine[0:80])
} else {
vpc.Errorf("Error reading line: %v -> %s", err, rawLine)
}
} else {
if lineMapOut != nil {
lineMap = lineMapOut
}
if lines != nil {
res = append(res, lines...)
}
}
}
if err := scanner.Err(); err != nil {
vpc.Warnf("Could not close %s %s: %v.", bucket, *mdata.Key, err)
return err
}
if err := zr.Close(); err != nil {
vpc.Warnf("Could not close zr %s %s: %v.", bucket, *mdata.Key, err)
return err
}
}
}
if len(res) > 0 {
record := FlowSet{
Lines: res,
}
// Pull out all the info we can from the key path.
err := record.ProcessKey(bucket, *mdata.Key)
if err != nil {
vpc.Warnf("Could not process %s %s: %v.", bucket, *mdata.Key, err)
return err
}
// Send this record on to be processed.
select {
case vpc.recs <- &record:
vpc.metrics.Flows.Mark(int64(len(record.Lines)))
default:
vpc.metrics.DroppedFlows.Mark(int64(len(record.Lines)))
}
} else {
vpc.Warnf("No flow data devices found for %s %s.", bucket, *mdata.Key)
}
return nil
}
// Get message from sqs
func (vpc *AwsVpc) checkQueue(ctx context.Context) error {
maxMessages := int64(10)
visTimout := int64(10)
waitTime := int64(5)
res, err := vpc.sqsCli.ReceiveMessage(&sqs.ReceiveMessageInput{
MaxNumberOfMessages: &maxMessages,
QueueUrl: &vpc.awsQUrl,
VisibilityTimeout: &visTimout,
WaitTimeSeconds: &waitTime,
})
if err != nil {
return err
}
for _, m := range res.Messages {
vpc.Debugf("Got message: %s", *m.Body)
// Delete for only once processing
_, err := vpc.sqsCli.DeleteMessage(&sqs.DeleteMessageInput{
QueueUrl: &vpc.awsQUrl,
ReceiptHandle: m.ReceiptHandle,
})
if err != nil {
vpc.Errorf("Error deleting message: %v", err)
}
// Now, process this out.
var record SQSEvent
if err := json.Unmarshal([]byte(*m.Body), &record); err != nil {
vpc.Errorf("Error parsing message: %v", err)
} else {
for _, rec := range record.Records {
if rec.S3.Bucket.Name != "" && rec.S3.Object.Key != "" {
obj := &s3.Object{
Key: aws.String(rec.S3.Object.Key),
}
go vpc.processObject(rec.S3.Bucket.Name, obj)
} else {
vpc.Errorf("Invalid message: %s", *m.Body)
}
}
}
}
return nil
}