sts_assume_role – Assume a role using AWS Security Token Service and obtain temporary credentials

Synopsis

  • Assume a role using AWS Security Token Service and obtain temporary credentials

Requirements

The below requirements are needed on the host that executes this module.

  • boto
  • boto3
  • botocore
  • python >= 2.6

Parameters

Parameter Choices/Defaults Comments
aws_access_key
string
AWS access key. If not set then the value of the AWS_ACCESS_KEY_ID, AWS_ACCESS_KEY or EC2_ACCESS_KEY environment variable is used.

aliases: ec2_access_key, access_key
aws_secret_key
string
AWS secret key. If not set then the value of the AWS_SECRET_ACCESS_KEY, AWS_SECRET_KEY, or EC2_SECRET_KEY environment variable is used.

aliases: ec2_secret_key, secret_key
debug_botocore_endpoint_logs
boolean
added in 2.8
    Choices:
  • no ←
  • yes
Use a botocore.endpoint logger to parse the unique (rather than total) "resource:action" API calls made during a task, outputing the set to the resource_actions key in the task results. Use the aws_resource_action callback to output to total list made during a playbook. The ANSIBLE_DEBUG_BOTOCORE_LOGS environment variable may also be used.
duration_seconds
-
The duration, in seconds, of the role session. The value can range from 900 seconds (15 minutes) to 43200 seconds (12 hours). The max depends on the IAM role's sessions duration setting. By default, the value is set to 3600 seconds.
ec2_url
string
Url to use to connect to EC2 or your Eucalyptus cloud (by default the module will use EC2 endpoints). Ignored for modules where region is required. Must be specified for all other modules if region is not used. If not set then the value of the EC2_URL environment variable, if any, is used.
external_id
-
A unique identifier that is used by third parties to assume a role in their customers' accounts.
mfa_serial_number
-
The identification number of the MFA device that is associated with the user who is making the AssumeRole call.
mfa_token
-
The value provided by the MFA device, if the trust policy of the role being assumed requires MFA.
policy
-
Supplemental policy to use in addition to assumed role's policies.
profile
string
Uses a boto profile. Only works with boto >= 2.24.0.
region
string
The AWS region to use. If not specified then the value of the AWS_REGION or EC2_REGION environment variable, if any, is used. See http://docs.aws.amazon.com/general/latest/gr/rande.html#ec2_region

aliases: aws_region, ec2_region
role_arn
- / required
The Amazon Resource Name (ARN) of the role that the caller is assuming https://docs.aws.amazon.com/IAM/latest/UserGuide/Using_Identifiers.html#Identifiers_ARNs.
role_session_name
- / required
Name of the role's session - will be used by CloudTrail
security_token
string
AWS STS security token. If not set then the value of the AWS_SECURITY_TOKEN or EC2_SECURITY_TOKEN environment variable is used.

aliases: access_token
validate_certs
boolean
    Choices:
  • no
  • yes ←
When set to "no", SSL certificates will not be validated for boto versions >= 2.6.0.

Notes

Note

  • In order to use the assumed role in a following playbook task you must pass the access_key, access_secret and access_token.
  • If parameters are not set within the module, the following environment variables can be used in decreasing order of precedence AWS_URL or EC2_URL, AWS_ACCESS_KEY_ID or AWS_ACCESS_KEY or EC2_ACCESS_KEY, AWS_SECRET_ACCESS_KEY or AWS_SECRET_KEY or EC2_SECRET_KEY, AWS_SECURITY_TOKEN or EC2_SECURITY_TOKEN, AWS_REGION or EC2_REGION
  • Ansible uses the boto configuration file (typically ~/.boto) if no credentials are provided. See https://boto.readthedocs.io/en/latest/boto_config_tut.html
  • AWS_REGION or EC2_REGION can be typically be used to specify the AWS region, when required, but this can also be configured in the boto config file

Examples

# Note: These examples do not set authentication details, see the AWS Guide for details.

# Assume an existing role (more details: https://docs.aws.amazon.com/STS/latest/APIReference/API_AssumeRole.html)
- sts_assume_role:
    role_arn: "arn:aws:iam::123456789012:role/someRole"
    role_session_name: "someRoleSession"
  register: assumed_role

# Use the assumed role above to tag an instance in account 123456789012
- ec2_tag:
    aws_access_key: "{{ assumed_role.sts_creds.access_key }}"
    aws_secret_key: "{{ assumed_role.sts_creds.secret_key }}"
    security_token: "{{ assumed_role.sts_creds.session_token }}"
    resource: i-xyzxyz01
    state: present
    tags:
      MyNewTag: value

Return Values

Common return values are documented here, the following are the fields unique to this module:

Key Returned Description
changed
boolean
always
True if obtaining the credentials succeeds
sts_creds
dictionary
always
The temporary security credentials, which include an access key ID, a secret access key, and a security (or session) token

Sample:
{'access_key': 'XXXXXXXXXXXXXXXXXXXX', 'expiration': '2017-11-11T11:11:11+00:00', 'secret_key': 'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX', 'session_token': 'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX'}
sts_user
dictionary
always
The Amazon Resource Name (ARN) and the assumed role ID

Sample:
{'assumed_role_id': 'arn:aws:sts::123456789012:assumed-role/demo/Bob', 'arn': 'ARO123EXAMPLE123:Bob'}


Status

Authors

  • Boris Ekelchik (@bekelchik)
  • Marek Piatek (@piontas)

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