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S3 / MinIO policy minimal example: Read-only access to one bucket

This minimal policy grants read-only access to a specific S3 bucket (mybucket) and all its objects (including subdirectories).

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Action": [
                "s3:GetBucketPolicy",
                "s3:GetBucketLocation",
                "s3:ListAllMyBuckets",
                "s3:ListBucket"
            ],
            "Effect": "Allow",
            "Resource": [
                "arn:aws:s3:::mybucket"
            ],
            "Sid": ""
        },
        {
            "Action": [
                "s3:GetObject",
                "s3:ListBucket"
            ],
            "Effect": "Allow",
            "Resource": [
                "arn:aws:s3:::mybucket",
                "arn:aws:s3:::mybucket/*"
            ],
            "Sid": ""
        }
    ]
}