Alarm when Keystone is too slow

This patch adds a warning level alarm when the Keystone service doesn't
response fast enough.

Change-Id: Ib523e9e61204daf4b7ad271623ece88637505965

deployment_scripts/puppet/modules/fuel_lma_collector/templates/alarming.yaml.erb

@@ -622,6 +622,23 @@ lma_collector:
             window: 70
             periods: 0
             function: max
+    - name: 'keystone-response-time-duration'
+      description: 'Keystone API is too slow'
+      severity: 'warning'
+      enabled: 'true'
+      trigger:
+        logical_operator: 'or'
+        rules:
+          - metric: openstack_keystone_http_response_times
+            fields:
+              http_method: '== GET || == POST'
+              http_status: '!= 5xx'
+            relational_operator: '>'
+            threshold: 0.3
+            window: 60
+            periods: 0
+            value: upper_90
+            function: max
     - name: 'keystone-public-api-http-errors'
       description: 'Too many 5xx HTTP errors have been detected on keystone-public-api'
       severity: 'warning'
@@ -1014,6 +1031,7 @@ lma_collector:
     glance-logs: ['primary-controller', 'controller']
     neutron-api: ['primary-controller', 'controller']
     neutron-logs: ['primary-controller', 'controller', 'compute']
+    keystone-response-time: ['primary-controller', 'controller']
     keystone-public-api: ['primary-controller', 'controller']
     keystone-admin-api: ['primary-controller', 'controller']
     keystone-logs: ['primary-controller', 'controller']
@@ -1127,6 +1145,8 @@ lma_collector:
       http_errors: ['neutron-api-http-errors']
     neutron-logs:
       error: ['neutron-logs-error']
+    keystone-response-time:
+      duration: ['keystone-response-time-duration']
     keystone-public-api:
       http_errors: ['keystone-public-api-http-errors']
     keystone-logs:

deployment_scripts/puppet/modules/fuel_lma_collector/templates/gse_filters.yaml.erb

@@ -279,6 +279,11 @@ lma_collector:
         group_by: member
         members:
           - workers
+      keystone-response-time:
+        policy: highest_severity
+        group_by: member
+        members:
+          - duration
       keystone-public-api:
         policy: highest_severity
         group_by: member
@@ -613,6 +618,7 @@ lma_collector:
         group_by: member
         members:
           - keystone-logs
+          - keystone-response-time
           - keystone-public-api
           - keystone-admin-api
           - controller