AWS ASSUMEROLE

 Assume an IAM role using the AWS CLI (amazon.com)

Authenticating to AWS with Environment Variables | by Yevgeniy Brikman | Gruntwork

amazon web services - bash script for AWS assume-role - Stack Overflow

aws sts get-caller-identity

aws sts assume-role --role-arn "arn:aws:iam::123456789012:role/example-role" --role-session-name AWSCLI-Session

export AWS_ACCESS_KEY_ID=RoleAccessKeyID export AWS_SECRET_ACCESS_KEY=RoleSecretKey export AWS_SESSION_TOKEN=RoleSessionToken

aws sts get-caller-identity

unset AWS_ACCESS_KEY_ID AWS_SECRET_ACCESS_KEY AWS_SESSION_TOKEN aws sts get-caller-identity

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Next, you call aws sts assume-role, passing it the ARN of the IAM Role you want to assume, plus a “role session name” that can be used to tell who is assuming the IAM Role and why (as the same IAM Role may be assumed by may different users):

aws sts assume-role \
  --role-arn arn:aws:iam::123456789012:role/dev-full-access \
  --role-session-name username@company.com

This will return a blob of JSON that contains Temporary Access Keys:

{
  "Credentials": {
    "SecretAccessKey": "secret-access-key",
    "SessionToken": "temporary-session-token",
    "Expiration": "expiration-date-time",
    "AccessKeyId": "access-key-id"
  }
}

You must now set these Temporary Access Keys as environment variables, overriding the old environment variables:

export AWS_ACCESS_KEY_ID=<Access-key-from-output>
export AWS_SECRET_ACCESS_KEY=<Secret-access-key-from-output>
export AWS_SESSION_TOKEN=<Session-Token-from-output>

~/.aws ~.aws/confg ~./aws/credentials IAM Access Key/Secret Key

 aws configure

aws configure --profile karan

aws s3 ls 

aws s3 ls profile --fubar

vi ~/.aws/config

vi ~/.aws/credentials

aws iam list-users --profile default

[ec2-user@ip-172-31-16-83 .aws]$ aws iam list-users

An error occurred (AccessDenied) when calling the ListUsers operation: User: arn:aws:sts::061116847625:assumed-role/S3FullAccessFromEC2NoCredReq/i-0622cebe406df06cd is not authorized to perform: iam:ListUsers on resource: arn:aws:iam::061116847625:user/