Authentication and Access Control Best Practices

This topic describes best practices for Identity and Access Management and the eucalyptus account.

Identity and Access Management

Eucalyptus manages access control through an authentication, authorization, and accounting system. This system manages user identities, enforces access controls over resources, and provides reporting on resource usage as a basis for auditing and managing cloud activities. The user identity organizational model and the scheme of authorizations used to access resources are based on and compatible with the AWS Identity and Access Management (IAM) system, with some Eucalyptus extensions provided that support ease-of-use in a private cloud environment.

For a general introduction to IAM in Eucalyptus, see Access Concepts in the IAM Guide. For information about using IAM quotas to enforce limits on resource usage by users and accounts in Eucalyptus, see the Quotas section in the IAM Guide.

The Amazon Web Services IAM Best Practices are also generally applicable to Eucalyptus.

Credential Management

Protection and careful management of user credentials (passwords, access keys, X.509 certificates, and key pairs) is critical to cloud security. When dealing with credentials, we recommend:

Privileged Roles

The eucalyptus account is a super-privileged account in Eucalyptus. It has access to all cloud resources, cloud setup, and management. The users within this account do not obey IAM policies and compromised credentials can result in a complete cloud compromisation that is not easy to contain. We recommend limiting the use of this account and associated users' credentials as much as possible.

For all unprivileged operations, use regular accounts. If you require super-privileged access (for example, management of resources across accounts and cloud setup administration), we recommend that you use one of the predefined privileged roles.

The Account, Infrastructure, and Resource Administrator roles provide a more secure way to gain super privileges in the cloud. Credentials returned by an assume-role operation are short-lived (unlike regular user credentials). Privileges available to each role are limited in scope and can be revoked easily by modifying the trust or access policy for the role.