Difference between revisions of "EES Service Reference Card"
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== Functional description == | == Functional description == | ||
| − | The EES is a pluggable, configurable authorisation service similar to the Site Central Authorisation Service (SCAS). | + | The [[EES]] is a pluggable, configurable authorisation service similar to the Site Central Authorisation Service (SCAS). |
The role of the EES is to ensure that an appropriate site-specific execution environment is procured | The role of the EES is to ensure that an appropriate site-specific execution environment is procured | ||
based on the site-agnostic obligations and attributes it receives as input in the form of SAML2-XACML2 | based on the site-agnostic obligations and attributes it receives as input in the form of SAML2-XACML2 | ||
Revision as of 10:30, 25 May 2012
Execution Environment Service (EES)
Functional description
The EES is a pluggable, configurable authorisation service similar to the Site Central Authorisation Service (SCAS). The role of the EES is to ensure that an appropriate site-specific execution environment is procured based on the site-agnostic obligations and attributes it receives as input in the form of SAML2-XACML2 requests. It runs as a standalone service, responding to requests from a Policy Enforcement Point (PEP) which have been augmented with information from a Policy Decision Point (PDP).
From the outside, the EES can be viewed as an obligation transformer; for example it can be used to transform a site-agnostic obligation for a local account mapping to a site-specific obligation for on-demand virtual machine deployment.
To integrate the EES with an existing Argus installation, a separate component called the EES Obligation Handler should be configured in the PEP daemon. For more details regarding integration in Argus, please see the documentation for this component. The EES itself ships with a pre-configured transformer plug-in which extracts PDP data from the SAML2-XACML2 environment attributes. This plug-in is not required when PDP data is not transmitted to the EES.
Daemons running
/usr/sbin/ees
Init scripts and options (start|stop|restart|reload|status)
/etc/init.d/ees
Configuration files with example or template
the EES is designed to be highly customizable. Its configuration model allows policies to be expressed as state machines in the Policy Description Language (PDL), whose branches end in pre-configured plug-in instances. A small example as well as an ees.conf manpage is provided.
/etc/ees.conf
Logfile locations (and management) and other useful audit information
syslog available: yes
Custom log file can be configured
OPEN PORTS 6217
Possible unit test of the service
a high-level test script (test_ees.sh) is available. In addition a nagios probe is available.
Where is service state held
the EES uses plug-ins to connect to various other middleware. The configuration file for the EES defines the plug-ins used, as well as any dependant configuration files such as /etc/grid-security/gridmapfile and gridmapdir.
An integral part of the EES is the Attribute and Obligations Store (AOS), which is a component that allows plug-ins to query the (transient) SAML2-XACML2 data received. This object store is exposed through a simple API. This data is logged, but the intermediate state is not saved.
Cron jobs
None.
Security information
The EES should run firewalled from the rest of the network, only allowing the Argus PEPd access.
Access control mechanism description (authentication & authorization)
Mandated by plug-in and network configuration.
How to block / ban a user
Through Argus.
Network usage
Exposes a SOAP service that transforms SAML2-XACML2 requests.
Firewall configuration
the EES currently has no support for TLS connections. System administrators should configure the EES host to only allow access to the EES from the PEPd host.
Security recommendations
Security incompatibilities
List of external packages
Other security relevant comments
Utility scripts
Location of reference information for users
argus documentation
