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Refactoring delegate_to code

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Now, instead of relying on hostvars on the executor side, we compile
the vars for the delegated to host in a special internal variable and
have the PlayContext object look for things there when applying task/
var overrides, which is much cleaner and takes advantage of the code
already dealing with all of the magic variable variations.

Fixes #12127
Fixes #12079
This commit is contained in:
James Cammarata 2015-09-18 14:48:26 -04:00
parent fa69e8ebb8
commit 1f5584aa5b
3 changed files with 55 additions and 77 deletions
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84
lib/ansible/executor/task_executor.py
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@ -474,7 +474,18 @@ class TaskExecutor:
self._play_context.remote_addr = self._host.address
if self._task.delegate_to is not None:
self._compute_delegate(variables)
# since we're delegating, we don't want to use interpreter values
# which would have been set for the original target host
for i in variables.keys():
if i.startswith('ansible_') and i.endswith('_interpreter'):
del variables[i]
# now replace the interpreter values with those that may have come
# from the delegated-to host
delegated_vars = variables.get('ansible_delegated_vars', dict())
if isinstance(delegated_vars, dict):
for i in delegated_vars:
if i.startswith("ansible_") and i.endswith("_interpreter"):
variables[i] = delegated_vars[i]
conn_type = self._play_context.connection
if conn_type == 'smart':
@ -529,74 +540,3 @@ class TaskExecutor:
return handler
def _compute_delegate(self, variables):
# get the vars for the delegate by its name
try:
self._display.debug("Delegating to %s" % self._task.delegate_to)
if self._task.delegate_to in C.LOCALHOST and self._task.delegate_to not in variables['hostvars']:
this_info = dict(ansible_connection="local")
for alt_local in C.LOCALHOST:
if alt_local in variables['hostvars']:
this_info = variables['hostvars'][self._task.delegate_to]
if this_info == Undefined:
this_info = dict(ansible_connection="local")
break
else:
this_info = variables['hostvars'][self._task.delegate_to]
except Exception as e:
# make sure the inject is empty for non-inventory hosts
this_info = {}
self._display.debug("Delegate to lookup failed due to: %s" % str(e))
conn = this_info.get('ansible_connection')
if conn:
self._play_context.connection = conn
if conn in ('smart', 'paramiko'):
# smart and paramiko connections will be using some kind of ssh,
# so use 'ssh' for the string to check connection variables
conn_test = 'ssh'
else:
conn_test = conn
else:
# default to ssh for the connection variable test, as
# that's the historical default
conn_test = 'ssh'
# get the real ssh_address for the delegate and allow ansible_ssh_host to be templated
self._play_context.remote_addr = this_info.get('ansible_%s_host' % conn_test, this_info.get('ansible_host', self._task.delegate_to))
self._play_context.remote_user = this_info.get('ansible_%s_user' % conn_test, this_info.get('ansible_user', self._play_context.remote_user))
self._play_context.port = this_info.get('ansible_%s_port' % conn_test, this_info.get('ansible_port', self._play_context.port))
self._play_context.password = this_info.get('ansible_%s_pass' % conn_test, this_info.get('ansible_pass', self._play_context.password))
self._play_context.private_key_file = this_info.get('ansible_%s_private_key_file' % conn_test, self._play_context.private_key_file)
# because of the switch from su/sudo -> become, the become pass for the
# delegated-to host may be in one of several fields, so try each until
# (maybe) one is found.
for become_pass in ('ansible_become_password', 'ansible_become_pass', 'ansible_sudo_password', 'ansible_sudo_pass'):
if become_pass in this_info:
self._play_context.become_pass = this_info[become_pass]
break
# Last chance to get private_key_file from global variables.
# this is useful if delegated host is not defined in the inventory
if self._play_context.private_key_file is None:
self._play_context.private_key_file = this_info.get('ansible_ssh_private_key_file', None)
if self._play_context.private_key_file is None:
key = this_info.get('private_key_file', None)
if key:
self._play_context.private_key_file = os.path.expanduser(key)
# since we're delegating, we don't want to use interpreter values
# which would have been set for the original target host
for i in variables.keys():
if i.startswith('ansible_') and i.endswith('_interpreter'):
del variables[i]
# now replace the interpreter values with those that may have come
# from the delegated-to host
for i in this_info:
if i.startswith("ansible_") and i.endswith("_interpreter"):
variables[i] = this_info[i]