Sample upload S3

main.go

package main

import (
	"bytes"
	"context"
	"crypto/rand"
	"fmt"
	"log"
	"time"

	"github.com/aws/aws-sdk-go-v2/aws"
	"github.com/aws/aws-sdk-go-v2/credentials"
	"github.com/aws/aws-sdk-go-v2/service/s3"
)

func main() {
	bucket := aws.String("test")
	size := 1024 * 1024

	cli := s3.New(s3.Options{
		EndpointResolver: s3.EndpointResolverFromURL("https://s3.selcdn.ru"),
		Region:           "ru-1a",
		UsePathStyle:     true,
		Credentials:      credentials.NewStaticCredentialsProvider("135815_test", "hH[4m*#,5s", ""),
		Retryer:          aws.NopRetryer{},
	})

	b := make([]byte, size)

	i := 0
	for range time.Tick(1 * time.Second) {
		i++
		key := fmt.Sprintf("%d.txt", i)
		fmt.Println(key)
		rand.Read(b)

		for {
			ctx, cancel := context.WithTimeout(context.TODO(), 1*time.Minute)
			_, err := cli.PutObject(ctx, &s3.PutObjectInput{
				Bucket: bucket,
				Key:    aws.String(key),
				Body:   bytes.NewReader(b),
			})
			cancel()
			if err != nil {
				log.Println(err)
				time.Sleep(2 * time.Minute)
			}

			if err == nil {
				break
			}
		}

		out, err := cli.HeadObject(context.TODO(), &s3.HeadObjectInput{
			Bucket: bucket,
			Key:    aws.String(key),
		})
		if err != nil {
			log.Fatalln(err)
		}

		if out.ContentLength != int64(size) {
			log.Println(key, out.ContentLength, time.Now())
		}

		if i == 20 {
			break
		}
	}
}

sh-5.1$ go run s3test/main.go 
1.txt
2.txt
3.txt
4.txt
5.txt
6.txt
7.txt
8.txt
9.txt
10.txt
11.txt
12.txt
13.txt
14.txt
15.txt
16.txt
17.txt
18.txt
19.txt
2021/02/08 12:50:22 operation error S3: PutObject, https response error StatusCode: 0, RequestID: , HostID: , canceled, context deadline exceeded
2021/02/08 12:52:23 operation error S3: PutObject, https response error StatusCode: 409, RequestID: c725c56e-fe22-494a-9b87-f71ecf441327, HostID: , api error OperationAborted: A conflicting conditional operation is currently in progress against this resource. Try again.
2021/02/08 12:54:23 operation error S3: PutObject, https response error StatusCode: 409, RequestID: 416d2684-a3aa-4530-b199-b40e275052a5, HostID: , api error OperationAborted: A conflicting conditional operation is currently in progress against this resource. Try again.
2021/02/08 12:56:23 operation error S3: PutObject, https response error StatusCode: 409, RequestID: 3ea9ff0e-69fb-46b4-822a-aa102a655268, HostID: , api error OperationAborted: A conflicting conditional operation is currently in progress against this resource. Try again.
2021/02/08 12:58:23 operation error S3: PutObject, https response error StatusCode: 409, RequestID: 11c4bf30-c336-43b9-8c45-7913dcbb129d, HostID: , api error OperationAborted: A conflicting conditional operation is currently in progress against this resource. Try again.
2021/02/08 13:00:23 operation error S3: PutObject, https response error StatusCode: 0, RequestID: , HostID: , request send failed, Put "https://s3.selcdn.ru/test/19.txt?x-id=PutObject": http2: Transport: cannot retry err [stream error: stream ID 1; REFUSED_STREAM] after Request.Body was written; define Request.GetBody to avoid this error
2021/02/08 13:02:23 operation error S3: PutObject, https response error StatusCode: 409, RequestID: be58c7fa-b98a-43f1-b756-2863203cb60e, HostID: , api error OperationAborted: A conflicting conditional operation is currently in progress against this resource. Try again.
2021/02/08 13:04:23 operation error S3: PutObject, https response error StatusCode: 409, RequestID: db9cac82-9e1d-4f9f-b2a2-8464eab60a54, HostID: , api error OperationAborted: A conflicting conditional operation is currently in progress against this resource. Try again.
20.txt