AWS S3 Bucket Transfer from One Account to Another in Simple Steps

Transferring an AWS S3 bucket from one account to another is a straightforward process that can be completed in a few simple steps.

First, you'll need to create a new IAM user in the destination account, which will be used to access the S3 bucket. This user should have the necessary permissions to read and write data to the bucket.

To start the transfer, you'll need to use the AWS CLI or the AWS Management Console. The AWS CLI is a powerful tool that allows you to manage your AWS resources from the command line, while the Management Console provides a graphical interface for managing your resources.

You'll also need to specify the S3 bucket you want to transfer and the destination account information, including the account ID and the IAM user credentials.

Consider reading: S3 Console Aws

To set up an IAM user for cross-account S3 bucket transfer, you'll need to create the user and grant permissions in two parts. The first step is to create the user and set up the required permissions to ensure the transfer between the buckets.

Check this out: S3 Bucket Permission

The user account needs to be created in the destination account (account B). You'll also need to grant access to both buckets from the user perspective, which will guarantee that the account can access the buckets.

Granting access to both buckets from the buckets policy will allow the bucket to authorize the account to make a change. This is done by creating two inline policies on the s3-cross-account user's policy.

Here are the steps to create the s3-cross-account user's policy:

Note that if you're using encryption, you'll need to grant access to the KMS key to allow the s3-cross-account user to put encrypted files in the bucket.

Granting permissions is a crucial step in transferring S3 buckets from one account to another. To grant permissions, you need to sign in to the AWS Console in the origin account and navigate to the origin bucket.

To grant read privileges to the destination account, you'll need to create a bucket policy that grants s3.Get* and s3.List* permissions at the root level. This policy will need to be edited to include the destination account ID and origin bucket name.

In the destination account, create an IAM user with read access to the origin bucket and full access to the destination bucket. This IAM user will need to be set up with AWS CLI and programmatic access.

To grant permissions to the IAM user, attach a policy to the IAM user in the destination AWS account. This policy should include the necessary permissions for the IAM user to access the origin bucket and destination bucket.

Here are the steps to create an IAM user and attach a policy:

You can also create a cross-account user to grant permissions to both buckets. This user account will need to be created in the destination account and set up with the necessary permissions. To grant access to both buckets, you'll need to create two inline policies: one for the bucket policy and one for the user's policy.

Here are the steps to create a cross-account user and its policy:

In the user's policy, you can grant access to all buckets in a specific region by using the "arn:aws:s3:::bucket-B-*" resource. However, if you're dealing with multiple buckets, it's recommended to grant access to each bucket individually.

To copy S3 objects from one account to another, you'll need to use the AWS CLI. The `sync` command compares the source and destination buckets and copies any new or updated files to the destination bucket.

This command is idempotent, meaning if you run it multiple times, the result is the same as running it once. Simply replace origin-bucket-name and destination-bucket-name with the names of the buckets you want to transfer.

Using the `sync` command is a straightforward way to copy S3 objects, but you'll need to ensure that the destination AWS IAM user account credentials are used, otherwise the copied objects will still have the source account permissions.

You can also use the `sync` command with the `--acl` parameter to apply canned ACLs to all objects. However, if you need more control over access permissions, you'll need to define bucket policy permissions in the destination bucket.

To make the destination account also owner of the objects stored in the destination bucket, you can use the `--acl` parameter with the value `bucket-owner-full-control`. This will transfer ownership of the objects to the destination account, but the origin account will still have full control over the objects.

Broaden your view: Aws S3 Service Control Policy

To perform the transfer, you'll need to configure your setup first. You can view all possible remotes once configured.

The `rclone sync` command will scan the source bucket and update the target bucket. This process is idempotent, meaning multiple runs will yield the same result as a single run.

To optimize performance, you can use extra flags such as `--create-empty-src-dirs`, `--s3-chunk-size 20M`, `--s3-upload-concurrency 64`, and `--checksum`. These flags will allow for efficient file transfer and synchronization.

The `-P` flag will give you an interactive progress update in your terminal, along with an estimate of the transfer time. This will help you plan and manage the transfer process.

To obtain the 12-digit destination AWS account number, simply sign in to the destination AWS account.

You'll need to navigate to the Support center within the account.

There, you can copy the account number from the Support center page.

This 12-digit number is essential for the transfer process.

Syncing S3 objects to the destination bucket is a crucial step in the transfer process. You can use the AWS CLI command to achieve this.

The command to sync S3 objects from the source bucket to the destination bucket is aws s3 sync. This command compares the source and destination buckets and copies any new or updated files to the destination bucket.

Make sure to execute the command with the destination AWS IAM user account credentials, otherwise, the copied objects in the destination S3 bucket will still have the source account permissions and won't be accessible by destination account users.

If you need to apply canned ACLs to all objects, you can use the --acl parameter with the s3 sync command. However, if your objects are large, their metadatas may not be copied due to multi-part uploads.

Worth a look: S3 Command Line Aws

To attach the policy to the IAM user in the destination AWS account, you'll need to follow the steps outlined in the AWS documentation.

Attach the policy to the IAM user created previously in the destination AWS account. You can find instructions on how to do this in the AWS documentation.

The policy you need to attach is the one that was created in the previous step. Make sure you're attaching the correct policy to the right IAM user.

If you're unsure about the policy or the IAM user, double-check the documentation to ensure you're following the correct procedure.

You can attach the policy using the AWS Management Console or the AWS CLI.

We're going to transfer data from one S3 bucket to another, and it's not a straightforward task. The complexity of the task is evident from the fact that we have 3 buckets in account A, hosted in the Ireland region (EU-west-1), and 3 empty buckets in account B, hosted in the Paris region (EU-west-3).

The total amount of data to be transferred is a massive 10 To, which is a significant challenge. We'll also be dealing with bucket policies, which add an extra layer of complexity to the operation.

On a similar theme: Apache Airflow Aws Data Pipeline S3 Athena

The destination bucket is encrypted, which means we'll need to take extra precautions to ensure the data is transferred securely. Different accounts, different VPCs, and different regions make the operation complex to handle.

Here are the key challenges we'll be facing:

Transferring S3 buckets between AWS accounts is a straightforward process that involves setting appropriate bucket policies and using the `sync` command in the AWS CLI.

Verifying the transfer is crucial to ensure the security of your AWS infrastructure. Always remember to clean up after the process.

With these steps, you are now empowered to manage your AWS resources more flexibly and confidently.