The heat version is Liberty.
I tried to create a Mistral workflow resource via heat in a nested stack:
APPP_SCALE_OUT:
type: OS::Mistral::Workflow
properties:
name: { "list_join": ["_", [ "scale_APP_for_stack", { get_param: "OS::stack_name" } ]] }
type: direct
input:
stack_id: { get_param: "OS::stack_id" }
stack_name: { get_param: "OS::stack_name" }
tenant_id: { get_param: "OS::project_id" }
output:
result: <% $.scale_out_result %>
tasks:
...
The stack was created successfully, but when I updated the stack, this nested stack was failed to update:
2015-11-04 05:21:34.278 144 INFO heat.engine.stack [-] Stack UPDATE IN_PROGRESS (vapp2-appP_1-73tsc4sxkmbx): Stack UPDATE started
Traceback (most recent call last):
File "/usr/lib/python2.7/site-packages/eventlet/hubs/hub.py", line 457, in fire_timers
timer()
File "/usr/lib/python2.7/site-packages/eventlet/hubs/timer.py", line 58, in __call__
cb(*args, **kw)
File "/usr/lib/python2.7/site-packages/eventlet/greenthread.py", line 214, in main
result = function(*args, **kwargs)
File "/usr/lib/python2.7/site-packages/heat/engine/service.py", line 117, in _start_with_trace
return func(*args, **kwargs)
File "/usr/lib/python2.7/site-packages/osprofiler/profiler.py", line 105, in wrapper
return f(*args, **kwargs)
File "/usr/lib/python2.7/site-packages/heat/engine/stack.py", line 974, in update
updater()
File "/usr/lib/python2.7/site-packages/heat/engine/scheduler.py", line 174, in __call__
self.run_to_completion(wait_time=wait_time)
File "/usr/lib/python2.7/site-packages/heat/engine/scheduler.py", line 230, in run_to_completion
while not self.step():
File "/usr/lib/python2.7/site-packages/heat/engine/scheduler.py", line 217, in step
next(self._runner)
File "/usr/lib/python2.7/site-packages/heat/engine/scheduler.py", line 320, in wrapper
subtask = next(parent)
File "/usr/lib/python2.7/site-packages/heat/engine/stack.py", line 1208, in update_task
while not updater.step():
File "/usr/lib/python2.7/site-packages/heat/engine/scheduler.py", line 217, in step
next(self._runner)
File "/usr/lib/python2.7/site-packages/heat/engine/scheduler.py", line 318, in wrapper
subtask = parent.throw(*sys.exc_info())
File "/usr/lib/python2.7/site-packages/heat/engine/update.py", line 66, in __call__
yield self.updater()
File "/usr/lib/python2.7/site-packages/heat/engine/scheduler.py", line 309, in wrapper
step = next(subtask)
File "/usr/lib/python2.7/site-packages/heat/engine/scheduler.py", line 394, in __call__
raise_(exc_type, exc_val, traceback)
File "/usr/lib/python2.7/site-packages/heat/engine/scheduler.py", line 371, in __call__
r.start()
File "/usr/lib/python2.7/site-packages/heat/engine/scheduler.py", line 194, in start
self.step()
File "/usr/lib/python2.7/site-packages/heat/engine/scheduler.py", line 217, in step
next(self._runner)
File "/usr/lib/python2.7/site-packages/heat/engine/scheduler.py", line 285, in wrapper
subtask = next(parent)
File "/usr/lib/python2.7/site-packages/heat/engine/update.py", line 145, in _process_new_resource_update
new_res)
File "/usr/lib/python2.7/site-packages/heat/engine/update.py", line 174, in _update_in_place
self.new_stack.t)
File "/usr/lib/python2.7/site-packages/heat/engine/rsrc_defn.py", line 137, in reparse
properties=reparse_snippet(self._properties),
File "/usr/lib/python2.7/site-packages/heat/engine/rsrc_defn.py", line 133, in reparse_snippet
return template.parse(stack, copy.deepcopy(snippet))
File "/usr/lib/python2.7/site-packages/heat/engine/template.py", line 220, in parse
return parse(self.functions, stack, snippet)
File "/usr/lib/python2.7/site-packages/heat/engine/template.py", line 289, in parse
return dict((k, recurse(v)) for k, v in six.iteritems(snippet))
File "/usr/lib/python2.7/site-packages/heat/engine/template.py", line 289, in <genexpr>
return dict((k, recurse(v)) for k, v in six.iteritems(snippet))
File "/usr/lib/python2.7/site-packages/heat/engine/template.py", line 288, in parse
return Func(stack, fn_name, recurse(args))
File "/usr/lib/python2.7/site-packages/heat/engine/hot/functions.py", line 390, in __init__
'should be: %(example)s') % fmt_data)
ValueError: Incorrect arguments to "list_join" should be: "list_join" : [ " ", [ "str1", "str2"] ...]
This should be a common issue for heat.
I also met the problem, will look into this.