If the instance is already running you can modify the polices in the attached IAM role but you can not attache a new role or remove the existing role. What are IAM Roles ? I have been told to add one more role in existing instance profile of EC2. But EC2 can have instance profile that can hold more than one role? Learn more . In order to enable the access to instances, “ … If a name is not provided in arn format then the ListInstanceProfiles permission must also be granted. There is an EC2 instance running associated with this role.
Viewed 1k times 2. Ensure that your app-tier EC2 instances are using IAM roles to grant the necessary permissions (following the principle of least privilege) to the applications running on these instances.
Step 4: Attach an “IAM role” to an “EC2 Instance” This is the most important step of this post, in this, we are going to “attach the IAM role (CompleteAccess)” we have created in “Step 2” to our “EC2 Instance (Testing Instance)” we have created in “Step 3“. On the flip side you can associate a single IAM role to multiple EC2 instances. Active 3 years, 10 months ago. Right now, one of my apps needs also access to SNS. If a name is not provided in arn format then the ListInstanceProfiles permission must also be granted. In our application, we access the aws APIs with custom roles.
It runs several apps, that do use temporary credentials and everything is working fine. AWS Assume role with EC2 instance IAM role not working. EC2 instances are normally allowing to access the AWS services using a role and, policies should be attached to the role. This conformity rule assumes that all AWS resources provisioned in your app tier are tagged with
This will be a nugget on how to create and attach an IAM EC2 role while launching an EC2 instance. An EC2 instance can only be associated with a single IAM Role and you can only do that when you create the instance.
Using IAM we can define who can access which resource in EC2, RDS, S3 and all the other AWS services.