Transfer full s3 from one account to another | Moving Large S3 Files using dataSync Across Account

If you're Transferring large S3 buckets across AWS accounts you can do that in multiple ways. In this video, I will explain how you can do it using dataSync aws which is 10x faster than normal transfer.

===================== Source bucket policy =====================
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Principal": {
"AWS": [
"arn:aws:iam::DIST_ACCOUNT_ID:role/datasync-role",
"arn:aws:iam::DIST_ACCOUNT_ID:user/distention_account_logged_in_user"
]
},
"Action": [
"s3:GetBucketLocation",
"s3:ListBucket",
"s3:ListBucketMultipartUploads"
],
"Resource": "arn:aws:s3:::rource_bucket"
},
{
"Effect": "Allow",
"Principal": {
"AWS": [
"arn:aws:iam::DIST_ACCOUNT_ID:role/datasync-role",
"arn:aws:iam::DIST_ACCOUNT_ID:user/distention_account_logged_in_user"
]
},
"Action": [
"s3:AbortMultipartUpload",
"s3:DeleteObject",
"s3:GetObject",
"s3:ListMultipartUploadParts",
"s3:PutObjectTagging",
"s3:GetObjectTagging",
"s3:PutObject"
],
"Resource": "arn:aws:s3:::source_bucket/*"
}
]
}




=================Distention account role policy==================


{
"Version": "2012-10-17",
"Statement": [
{
"Action": [
"s3:GetBucketLocation",
"s3:ListBucket",
"s3:ListBucketMultipartUploads"
],
"Effect": "Allow",
"Resource": "arn:aws:s3:::source_bucket"
},
{
"Action": [
"s3:AbortMultipartUpload",
"s3:DeleteObject",
"s3:GetObject",
"s3:ListMultipartUploadParts",
"s3:PutObject",
"s3:GetObjectTagging",
"s3:ListBucket",
"s3:PutObjectTagging"
],
"Effect": "Allow",
"Resource": "arn:aws:s3:::source_bucket/*"
}
]
}




=============== Distention Bucket policy ==================




{
"Version": "2008-10-17",
"Statement": [
{
"Sid": "DataSyncCreateS3LocationAndTaskAccess",
"Effect": "Allow",
"Principal": {
"AWS": [
"arn:aws:iam::DIST_ACCOUNT_ID:role/datasync-role",
"arn:aws:iam::DIST_ACCOUNT_ID:user/distention_account_logged_in_user"
]
},
"Action": [
"s3:GetBucketLocation",
"s3:ListBucket",
"s3:ListBucketMultipartUploads",
"s3:AbortMultipartUpload",
"s3:DeleteObject",
"s3:GetObject",
"s3:ListMultipartUploadParts",
"s3:PutObject",
"s3:GetObjectTagging",
"s3:PutObjectTagging"
],
"Resource": [
"arn:aws:s3:::dist_bucket",
"arn:aws:s3:::dist_bucket/*"
]
}
]
}






===================== AWS CLI command =====================


aws datasync create-location-s3 --s3-bucket-arn arn:aws:s3:::s3-source-01 --s3-storage-class STANDARD --s3-config BucketAccessRoleArn="arn:aws:iam::1234567890:role/datasync-role" --region us-east-1