How To Configure Cross Region Replication for an S3 Bucket

1. Create an S3 bucket

• Type S3 in AWS Console and click

• Set Primary Bucket's Region as Singapore

• select Create bucket.

• Write bucket name as Unique Name

• Click enable

• Click Create bucket

• Change Region for Backup Bucket

• select Create bucket.

• Write bucket name as Unique Name

• Click enable

• Click Create bucket

2. Configure Cross-Region Replication

• Click Primary Bucket

• Click Managment

• Click Create replication rule

• Write rule name

• Select Apply to all objects in the bucket

• Choose backup-bucket

• Choose Create new role

[!NOTE]
You can create policy and rule by yourself too. If you want, please do the following until created policy and rule:

3. Create Policy and Rule at IAM

• Type IAM in AWS Console and open as new tab

• Click Policies

• Click Create policy

• Click json and delete default policy

• Copy and paste the following policy, edit with your bucket arn and click Next

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Action": [
                "s3:ListBucket",
                "s3:GetReplicationConfiguration",
                "s3:GetObjectVersionForReplication",
                "s3:GetObjectVersionAcl",
                "s3:GetObjectVersionTagging",
                "s3:GetObjectRetention",
                "s3:GetObjectLegalHold"
            ],
            "Effect": "Allow",
            "Resource": [
                "arn:aws:s3:::primary-bucket-23042024",
                "arn:aws:s3:::primary-bucket-23042024/*",
                "arn:aws:s3:::backup-bucket-23042024",
                "arn:aws:s3:::backup-bucket-23042024/*"
            ]
        },
        {
            "Action": [
                "s3:ReplicateObject",
                "s3:ReplicateDelete",
                "s3:ReplicateTags",
                "s3:ObjectOwnerOverrideToBucketOwner"
            ],
            "Effect": "Allow",
            "Resource": [
                "arn:aws:s3:::primary-bucket-23042024/*",
                "arn:aws:s3:::backup-bucket-23042024/*"
            ]
        }
    ]
}

• Write policy name and Click Create Policy

• Click Roles

• Click Create role

• Choose S3 and Click Next

• Choose TKK-S3-Cross-Region-Replication-Rule and Click Next

• Write TKK-S3-Cross-Region-Replication-Rule and Click Create role

• Go back to previous tab and choose TKK-S3-Cross-Region-Replication-Rule

• Select Change the storage class for the replicated objects and then in Storage class, select Standard-IA.

• Click Save

• Click No, do not replicate existing objects. and then Click Submit

• Select primary-bucket-23042024, and then select Upload.

• Click Add files

• select any file on your local computer, and click Open and then click Upload

• Click Close

• On the Buckets page, select backup-bucket-23042024 to view the file you just uploaded.

Congratulations, you have completed Lab-How To Configure Cross-Region Replication for an S3 Bucket

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Repository: AWS Learning Labs