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Only cache task.loop when delegated_host was templated. Fixes #43016 #43449 (#43451)

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Matt Martz 2018-07-31 15:58:53 -05:00 committed by GitHub
parent e7e63ec1e8
commit 5f98a5a736
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1 changed files with 13 additions and 9 deletions
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22
lib/ansible/vars/manager.py
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@ -503,24 +503,16 @@ class VariableManager:
# This task will be skipped later due to this, so we just setup
# a dummy array for the later code so it doesn't fail
items = [None]
# Update task.loop with templated items, this ensures that delegate_to+loop
# doesn't produce different restuls than TaskExecutor which may reprocess the loop
# Set loop_with to None, so we don't do extra unexpected processing on the cached items later
# in TaskExecutor
task.loop_with = None
task.loop = items
else:
raise AnsibleError("Failed to find the lookup named '%s' in the available lookup plugins" % task.loop_with)
elif task.loop is not None:
items = templar.template(task.loop)
# Update task.loop with templated items, this ensures that delegate_to+loop
# doesn't produce different restuls than TaskExecutor which may reprocess the loop
task.loop = items
else:
items = [None]
delegated_host_vars = dict()
item_var = getattr(task.loop_control, 'loop_var', 'item')
cache_items = False
for item in items:
# update the variables with the item value for templating, in case we need it
if item is not None:
@ -528,6 +520,8 @@ class VariableManager:
templar.set_available_variables(vars_copy)
delegated_host_name = templar.template(task.delegate_to, fail_on_undefined=False)
if delegated_host_name != task.delegate_to:
cache_items = True
if delegated_host_name is None:
raise AnsibleError(message="Undefined delegate_to host for task:", obj=task._ds)
if delegated_host_name in delegated_host_vars:
@ -583,6 +577,16 @@ class VariableManager:
include_delegate_to=False,
include_hostvars=False,
)
if cache_items:
# delegate_to templating produced a change, update task.loop with templated items,
# this ensures that delegate_to+loop doesn't produce different results than TaskExecutor
# which may reprocess the loop
# Set loop_with to None, so we don't do extra unexpected processing on the cached items later
# in TaskExecutor
task.loop_with = None
task.loop = items
return delegated_host_vars
def clear_facts(self, hostname):