> ## Documentation Index
> Fetch the complete documentation index at: https://notes.kodekloud.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Demo S3 Replication
> Learn to set up cross-region replication between Amazon S3 buckets, including creating buckets, configuring rules, reviewing IAM roles, and testing replication.
Learn how to set up cross-region replication between two Amazon S3 buckets. This guide walks you through creating source and destination buckets, configuring replication rules, reviewing IAM roles, and testing replication. The same steps apply to same-region replication.
## 1. Create Source and Destination Buckets
1. Open the [Amazon S3 console](https://s3.console.aws.amazon.com/s3/home) and click **Create bucket**.
2. Name your buckets and choose regions:
| Bucket Name | Region | Purpose |
| ------------------- | --------------------- | ----------- |
| kk-repl-source | US East (N. Virginia) | Source |
| kk-repl-destination | US West (Oregon) | Destination |
3. After creating both, you should see them listed:
Bucket names must be globally unique and comply with DNS naming conventions.
## 2. Configure the Replication Rule
1. In the source bucket, select the **Management** tab and then **Replication rules**. Click **Create replication rule**.
2. Enter a name (e.g., **MyReplication**) and enable the rule. Set the rule scope to **Entire bucket** so all objects replicate.
3. Under **Destination**, click **Browse** and choose `kk-repl-destination`.
4. If versioning is not enabled on either bucket, follow the console prompts to turn it on.
Objects uploaded before versioning is enabled will not be replicated.
5. Under **IAM role**, choose **Create new role**. Leave the destination storage class at its default unless you need a different class.
6. On the replication settings page, enable **Replication Time Control (RTC)** to guarantee replication within 15 minutes. You can also opt to replicate delete markers or metadata. Click **Save**.
7. Your new rule will now appear in the list:
## 3. Review the IAM Role
The console created an IAM role (for example, `role-for-kk-repl-source`) with the policies needed for replication. To inspect:
1. Go to the [IAM console](https://console.aws.amazon.com/iam/home#/roles) and click **Roles**.
2. Select the replication role and review its attached policy:
```json theme={null}
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": [
"s3:ListBucket",
"s3:GetReplicationConfiguration",
"s3:GetObjectVersionForReplication",
"s3:GetObjectVersionACL",
"s3:GetObjectVersionTagging",
"s3:GetObjectRetention",
"s3:GetObjectLegalHold"
],
"Resource": [
"arn:aws:s3:::kk-repl-source",
"arn:aws:s3:::kk-repl-destination"
]
},
{
"Effect": "Allow",
"Action": [
"s3:ReplicateObject",
"s3:ReplicateDelete",
"s3:ReplicateTags",
"s3:ObjectOwnerOverrideToBucketOwner"
],
"Resource": [
"arn:aws:s3:::kk-repl-source/*",
"arn:aws:s3:::kk-repl-destination/*"
]
}
]
}
```
## 4. Test Replication
1. Upload a few files to the source bucket (`kk-repl-source`).
2. In another tab, open the destination bucket (`kk-repl-destination`) and verify that the objects appear within 15 minutes.
Congratulations! You’ve successfully configured cross-region replication for Amazon S3.
## Links and References
* [Amazon S3 Replication](https://docs.aws.amazon.com/AmazonS3/latest/dev/crr.html)
* [AWS Identity and Access Management](https://aws.amazon.com/iam/)
* [Amazon S3 Versioning](https://docs.aws.amazon.com/AmazonS3/latest/dev/Versioning.html)