Use Jinja as template engine for scenarios

performa/engine/main.py

@@ -15,6 +15,7 @@
 
 import os
 
+import jinja2
 from oslo_config import cfg
 from oslo_log import log as logging
 import yaml
@@ -30,11 +31,13 @@ from performa.engine import utils
 LOG = logging.getLogger(__name__)
 
 
-def resolve_hosts(scenario, hosts):
+def resolve_hosts(scenario_template, hosts):
-    for k, v in hosts.items():
+    jinja_env = jinja2.Environment()
-        scenario = scenario.replace('$%s' % k, ','.join(v) + ',')
 
-    return scenario
+    compiled_template = jinja_env.from_string(scenario_template)
+    rendered_template = compiled_template.render(hosts)
+
+    return rendered_template
 
 
 def main():

performa/scenarios/db/sysbench.yaml

@@ -3,9 +3,12 @@ title: Sysbench DB
 description:
   This scenario uses sysbench to execute DB test plan.
 
+parameters:
+  target: List of hosts were omsimulator will be executed
+
 setup:
   -
-    hosts: $target
+    hosts: {{ target }}
     tasks:
     - name: installing sysbench
       apt: name=sysbench
@@ -15,20 +18,20 @@ setup:
         name: atop, daemon
       become: yes
   -
-    hosts: $target
+    hosts: {{ target }}
     tasks:
     - atop: command=start
 
 execution:
   -
-    hosts: $target
+    hosts: {{ target }}
     matrix:
       threads: [ 10, 20, 30, 40, 50, 60 ]
     tasks:
     - sysbench_oltp:
         duration: 10
   -
-    hosts: $target
+    hosts: {{ target }}
     tasks:
     - atop:
         command: stop

performa/scenarios/mq/omsimulator.yaml

@@ -3,9 +3,12 @@ title: OMSimulator
 description:
   This scenario uses oslo.messaging simulator tool to execute MQ test plan.
 
+parameters:
+  target: List of hosts were omsimulator will be executed
+
 setup:
   -
-    hosts: $target
+    hosts: {{ target }}
     tasks:
     - apt: name=git
       become: yes
@@ -25,11 +28,11 @@ setup:
 
 execution:
   -
-    hosts: $target
+    hosts: {{ target }}
     tasks:
     - atop: command=start
   -
-    hosts: $target
+    hosts: {{ target }}
     matrix:
       threads: [ 1, 2, 5, 10, 25, 50, 100 ]
     tasks:
@@ -38,7 +41,7 @@ execution:
         duration: 10
         url: "rabbit://stackrabbit:swordfish@localhost:5672/"
   -
-    hosts: $target
+    hosts: {{ target }}
     tasks:
     - atop:
         command: stop