Copy S3 Bucket to Another AWS Account with AWS IAM

To copy an S3 bucket to another AWS account with AWS IAM, you'll need to create an IAM role in the source account that allows access to the S3 bucket. This role will be used by the destination account to access the bucket.

The IAM role should have the necessary permissions to read from the S3 bucket, such as the "s3:GetObject" and "s3:ListBucket" actions.

You'll also need to create an IAM user in the destination account that has the necessary permissions to write to the S3 bucket. This user will be used to access the bucket in the destination account.

The IAM user in the destination account should have the necessary permissions to create a new bucket, such as the "s3:CreateBucket" action.

To set up the source S3 bucket, you'll need to create it in your source AWS account. Create the S3 bucket in source account named prakash_source_s3_bucket.

Attach the following policy to the newly created S3 bucket: {"Version":"2012-10-17"",Statement":[{"Sid":"DelegateS3Access"",Effect":"Allow"",Principal":{"AWS":"arn:aws:iam::102421234562:root"}",Action":["s3:ListBucket"",s3:GetObject"]",Resource":["arn:aws:s3:::prakash_source_s3_bucket/*"",arn:aws:s3:::prakash_source_s3_bucket"]}]}.

You can find more information on creating an S3 bucket and attaching a policy in the AWS official document.

To set up the source bucket, you'll need two AWS accounts, a source bucket with objects, and a destination bucket that will receive the objects. You'll also need an IAM user in the destination account with the necessary permissions to access both buckets.

To create an IAM policy in the destination account, you'll need to allow reading the source bucket and writing the destination bucket. You can do this by creating a policy that grants the necessary permissions to the IAM user.

You'll need to create a bucket policy for the source bucket in the source account that allows the destination account to access the source bucket. This can be done by logging in to the source bucket's AWS account, selecting the source bucket, and creating a bucket policy that grants the necessary permissions.

You'll need to attach both the source and destination S3 buckets to the SnapShooter, which involves providing your access key and secret access key, selecting the region, and typing the bucket name.

To copy an S3 bucket to another account, you'll need to configure IAM correctly. First, create an IAM user in the destination account and attach a policy that allows access to the destination S3 bucket.

You'll also need to create an IAM policy that gives read access to the source bucket and write access to the destination bucket. This policy should be named something you'll remember, and you can create it by selecting the "JSON" tab and entering the JSON code.

Here's a summary of the IAM configuration steps:

Note that you'll need to replace the 12-digit account number of the target AWS account and the name of the source bucket in the policy.

Creating an IAM User is a crucial step in configuring your AWS account for secure and programmatic access. You can create an IAM user in the destination account by following the official AWS documentation.

To create an IAM user, navigate to the IAM dashboard and select "Users" from the Access management dropdown menu. Click "Add user" and give your new IAM user a name. Select "programmatic access" to access buckets using the AWS CLI.

Attach the policy to the newly created IAM user by clicking "Attach existing policies directly". Enter the policy name in the "Filter policies" search bar, checkbox the policy, and click "Next: Tags". In our example, the policy name is "s3-copy-policy".

Here are the steps to create an IAM user:

Make sure to store the Access key ID and Secret access key safely, as they will be needed for programmatic access later.

To configure a policy for the source bucket in the source account, you must apply a bucket policy to the source bucket. This policy grants access to the target AWS account.

You need to replace 123456789012 with the 12-digit account number of the target AWS account, and replace BUCKET_NAME with the name of the source bucket, twice. This is because the policy uses arn:aws:iam::123456789012:root to signify the target AWS account as a whole.

The policy should be applied to the source bucket, allowing the target AWS account to read objects from it. This is done by attaching the policy to the source S3 bucket.

Here's an example of what the policy code should look like:

{"Version":"2012-10-17"",Statement":[{"Sid":"DelegateS3Access"",Effect":"Allow"",Principal":{"AWS":"arn:aws:iam::102421234562:root"}",Action":["s3:ListBucket"",s3:GetObject"]",Resource":["arn:aws:s3:::prakash_source_s3_bucket/*"",arn:aws:s3:::prakash_source_s3_bucket"]}]

Note that you should replace the example bucket names with your own and your destination account Account ID.

An IAM Policy is a crucial part of IAM Configuration, and it's essential to understand how to create one.

You can create an IAM policy by going to the destination account's Identity and Access Management (IAM) dashboard, selecting "Policies", and clicking "Create policy." From there, you'll select the "JSON" tab and enter the following JSON code, making sure to use your source and destination bucket names.

A policy should have a name that you'll remember, and you can create it by clicking "Create policy."

To grant read access to the source bucket and write access to the destination bucket, you'll need to specify the actions and resources in the policy. For example, you can use the following JSON code:

{

"Version": "2012-10-17",

"Statement": [

{

"Effect": "Allow",

"Action": ["s3:ListBucket", "s3:GetObject"],

"Resource": ["arn:aws:s3:::prakash_source_s3_bucket", "arn:aws:s3:::prakash_source_s3_bucket/*"]

},

{

"Effect": "Allow",

"Action": ["s3:ListBucket", "s3:PutObject", "s3:PutObjectAcl"],

"Resource": ["arn:aws:s3:::prakash_destination_s3_bucket", "arn:aws:s3:::prakash_destination_s3_bucket/*"]

}

]

}

This policy grants the necessary permissions to read from the source bucket and write to the destination bucket.

To copy an S3 bucket to another account, you'll need to set up two AWS accounts, one for the source bucket and one for the destination bucket.

You'll need to create two AWS S3 buckets, one in each account. This is a crucial step, as you can't copy objects to a bucket that doesn't exist.

The destination account needs to have an IAM user with the necessary permissions to access both buckets. This involves creating an IAM policy in the destination account that allows reading the source bucket and writing the destination bucket.

To grant these permissions, you'll need to create an IAM user in the destination account and connect it to the IAM policy. This will give the user the necessary access to copy objects from the source bucket to the destination bucket.

Here are the steps to create an IAM user and connect it to the IAM policy:

You'll also need to create a bucket-policy that allows the destination account to get objects from the source bucket. This involves attaching a specific policy to the source S3 bucket, which grants the destination account the necessary permissions.