Add support for multiple contexts(stacks)

A list of contexts can be specified, cross referencing between
contexts is supported and shown in the added sample file.

TBD can placement group work between stacks?

Change-Id: I26dbe94e52ba0be5e49f50fd70540a57de2204cb
JIRA: YARDSTICK-31
Signed-off-by: Hans Feldt <hans.feldt@ericsson.com>

1 files changed, 35 insertions, 19 deletions

diff --git a/yardstick/main.py b/yardstick/main.py
index 050a56436..5669fde10 100755
--- a/yardstick/main.py
+++ b/yardstick/main.py
@@ -23,7 +23,6 @@ import pkg_resources
 from yardstick.benchmark.context.model import Context
 from yardstick.benchmark.runners import base as base_runner
 from yardstick.cmdparser import CmdParser
-from yardstick.orchestrator.heat import HeatStack
 
 
 class TaskParser(object):
@@ -43,43 +42,58 @@ class TaskParser(object):
         if cfg["schema"] != "yardstick:task:0.1":
             sys.exit("error: file %s has unknown schema %s" % (self.path,
                                                                cfg["schema"]))
-        context = Context()
-        context.init(cfg["context"])
+
+        # TODO: support one or many contexts? Many would simpler and precise
+        if "context" in cfg:
+            context_cfgs = [cfg["context"]]
+        else:
+            context_cfgs = cfg["contexts"]
+
+        for cfg_attrs in context_cfgs:
+            context = Context()
+            context.init(cfg_attrs)
 
         run_in_parallel = cfg.get("run_in_parallel", False)
 
         # TODO we need something better here, a class that represent the file
-        return cfg["scenarios"], run_in_parallel, context
+        return cfg["scenarios"], run_in_parallel
 
 
 def atexit_handler():
     '''handler for process termination'''
     base_runner.Runner.terminate_all()
 
-    if HeatStack.stacks_exist():
-        print "Deleting all stacks"
-    HeatStack.delete_all()
+    if len(Context.list) > 0:
+        print "Undeploying all contexts"
+        for context in Context.list:
+            context.undeploy()
 
 
-def run_one_scenario(scenario_cfg, context, output_file):
+def run_one_scenario(scenario_cfg, output_file):
     '''run one scenario using context'''
     key_filename = pkg_resources.resource_filename(
         'yardstick.resources', 'files/yardstick_key')
 
-    host = context.get_server(scenario_cfg["host"])
+    host = Context.get_server(scenario_cfg["host"])
 
     runner_cfg = scenario_cfg["runner"]
     runner_cfg['host'] = host.floating_ip["ipaddr"]
-    runner_cfg['user'] = context.user
+    runner_cfg['user'] = host.context.user
     runner_cfg['key_filename'] = key_filename
     runner_cfg['output_filename'] = output_file
 
-    target = context.get_server(scenario_cfg["target"])
+    # TODO target should be optional to support single VM scenarios
+    target = Context.get_server(scenario_cfg["target"])
     if target.floating_ip:
         runner_cfg['target'] = target.floating_ip["ipaddr"]
 
-    # TODO hardcoded name below, a server can be attached to several nets
-    scenario_cfg["ipaddr"] = target.ports["test"]["ipaddr"]
+    # TODO scenario_cfg["ipaddr"] is bad, "dest_ip" is better
+    if host.context != target.context:
+        # target is in another context, get its public IP
+        scenario_cfg["ipaddr"] = target.floating_ip["ipaddr"]
+    else:
+        # TODO hardcoded name below, a server can be attached to several nets
+        scenario_cfg["ipaddr"] = target.ports["test"]["ipaddr"]
 
     runner = base_runner.Runner.get(runner_cfg)
 
@@ -105,17 +119,18 @@ def main():
     prog_args = CmdParser().parse_args()
 
     parser = TaskParser(prog_args.taskfile[0])
-    scenarios, run_in_parallel, context = parser.parse()
+    scenarios, run_in_parallel = parser.parse()
 
     if prog_args.parse_only:
         sys.exit(0)
 
-    context.deploy()
+    for context in Context.list:
+        context.deploy()
 
     runners = []
     if run_in_parallel:
         for scenario in scenarios:
-            runner = run_one_scenario(scenario, context, prog_args.output_file)
+            runner = run_one_scenario(scenario, prog_args.output_file)
             runners.append(runner)
 
         # Wait for runners to finish
@@ -125,15 +140,16 @@ def main():
     else:
         # run serially
         for scenario in scenarios:
-            runner = run_one_scenario(scenario, context, prog_args.output_file)
+            runner = run_one_scenario(scenario, prog_args.output_file)
             runner_join(runner)
             print "Runner ended, output in", prog_args.output_file
 
     if prog_args.keep_deploy:
         # keep deployment, forget about stack (hide it for exit handler)
-        context.stack = None
+        Context.list = []
     else:
-        context.undeploy()
+        for context in Context.list:
+            context.undeploy()
 
     print "Done, exiting"