ECS 3.6.2 Data Access Guide

Same account access with AssumeRole

You can access the same account using AssumeRole by attaching a policy to the user (identical to the previous user in a different account) or by adding the user as a principal directly in the role trust policy.

Method	Example
Attaching a policy to the user	Trust policy for Role assumeRoleSameAccount in ns1: { "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Principal": { "AWS": "urn:ecs:iam::ns1:root" }, "Action": "sts:AssumeRole" } ] } Policy is attached to the user1 in ns1 to AssumeRole: { "Version": "2012-10-17", "Statement": [ { "Action": [ "sts:AssumeRole" ], "Resource": "urn:ecs:iam::ns1:role/assumeRoleSameAccount", "Effect": "Allow", "Sid": "VisualEditor0" } ] }
Adding the user to the role trust policy	Trust policy for Role in ns1 with an ECS IAM user: { "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Principal": { "AWS": "urn:ecs:iam::ns1:user/user1" }, "Action": "sts:AssumeRole" } ] }

Method

Example

Attaching a policy to the user

Trust policy for Role assumeRoleSameAccount in ns1:

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Principal": {
        "AWS": "urn:ecs:iam::ns1:root"
      },
      "Action": "sts:AssumeRole"
    }
  ]
}

Policy is attached to the user1 in ns1 to AssumeRole:

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Action": [
        "sts:AssumeRole"
      ],
      "Resource": "urn:ecs:iam::ns1:role/assumeRoleSameAccount",
      "Effect": "Allow",
      "Sid": "VisualEditor0"
    }
  ]
}

Adding the user to the role trust policy

Trust policy for Role in ns1 with an ECS IAM user:

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Principal": {
        "AWS": "urn:ecs:iam::ns1:user/user1"
      },
      "Action": "sts:AssumeRole"
    }
  ]
}

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ECS 3.6.2 Data Access Guide

Same account access with AssumeRole

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