Add Resource Use Limits use case

JIRA: COPPER-3

Change-Id: I1fcb4df3b5e7c24fdf34802e3f3f1ecbda842cd6
Signed-off-by: blsaws <blsaws@hotmail.com>

1 files changed, 23 insertions, 3 deletions

diff --git a/docs/design/usecases.rst b/docs/design/usecases.rst
index c320ec6..ca37e13 100644
--- a/docs/design/usecases.rst
+++ b/docs/design/usecases.rst
@@ -151,15 +151,16 @@ As implemented through OpenStack Congress:
   ldap:group(user1, g), 
   ldap:group(user2, g)
 
+Resource Management
+-------------------
+
 Resource Reclamation
---------------------
+....................
 
 As a service provider or tenant, I need to be informed of VMs that are under-utilized so that I can reclaim the VI resources. (example from `RuleYourCloud blog <http://ruleyourcloud.com/2015/03/12/scaling-up-congress.html>`_) 
 
 As implemented through OpenStack Congress: 
 
-*Note: untested example...*
-
 .. code:: 
 
   reclaim_server(vm) :-
@@ -171,3 +172,22 @@ As implemented through OpenStack Congress:
   nova:servers(vm, vm_name, user_id),
   keystone:users(user_id, email)
 
+Resource Use Limits
+...................
+
+As a tenant or service provider, I need to be automatically terminate an instance that has run for a pre-agreed maximum duration. 
+
+As implemented through OpenStack Congress: 
+
+.. code:: 
+
+  terminate_server(vm) :-
+  ceilometer:statistics("duration",vm, avg_cpu),
+  lessthan(avg_cpu, 1)
+
+  error(user_id, email, vm_name) :-
+  reclaim_server(vm),
+  nova:servers(vm, vm_name, user_id),
+  keystone:users(user_id, email)
+
+