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import json
from collections import namedtuple
from ansible.parsing.dataloader import DataLoader
from ansible.vars import VariableManager
from ansible.inventory import Inventory
from ansible.playbook.play import Play
from ansible.executor.task_queue_manager import TaskQueueManager from ansible.executor.task_result import TaskResult
from ansible.plugins.callback import CallbackBase
# 自定义 callback,即在运行 api 后调用本类中的 v2_runner_on_ok(),在这里会输出 host 和 result 格式
class ResultCallback(CallbackBase):
"""A sample callback plugin used for performing an action as results come in
If you want to collect all results into a single object for processing at
the end of the execution, look into utilizing the ``json`` callback plugin
or writing your own custom callback plugin
"""
def v2_runner_on_ok(self, result, **kwargs):
"""Print a json representation of the result
This method could store the result in an instance attribute for retrieval later
"""
# result 包含'_check_key', '_host', '_result', '_task', 'is_changed', 'is_failed', 'is_skipped', 'is_unreachable'
host = result._host
print json.dumps({host.name: result._result}, indent=4)
"""
def v2_on_any(self, *args, **kwargs):
if isinstance(args[0], TaskResult):
print json.dumps({args[0]._host.name: args[0]._result}, indent=4)
"""
Options = namedtuple('Options', ['connection', 'module_path', 'forks', 'become', 'become_method', 'become_user', 'check'])
# initialize needed objects
variable_manager = VariableManager()
loader = DataLoader()
options = Options(connection='smart', module_path=None, forks=100, become=None, become_method=None, become_user=None, check=False)
passwords = dict(conn_pass='mypassword') # 目前只发现有两个key,conn_pass, become_pass
# Instantiate our ResultCallback for handling results as they come in
results_callback = ResultCallback()
# create inventory and pass to var manager
inventory = Inventory(loader=loader, variable_manager=variable_manager, host_list='hosts')
# hosts文件,也可以是 ip列表 '10.1.162.18:322, 10.1.167.36' 或者 ['10.1.162.18:322', '10.1.167.36']
variable_manager.set_inventory(inventory)
# create play with tasks
play_source = dict(
name = "Ansible Play",
hosts = 'web', # 对应 playbook 入口yaml文件的 hosts变量,也可以是 ip 10.1.162.18
gather_facts = 'no',
tasks = [
dict(action=dict(module='shell', args='ifconfig'), register='shell_out'),
#dict(action=dict(module='debug', args=dict(msg='{{shell_out.stdout}}')))
]
)
play = Play().load(play_source, variable_manager=variable_manager, loader=loader)
# actually run it
# TaskQueueManager 是创建进程池,负责输出结果和多进程间数据结构或者队列的共享协作
tqm = None
try:
tqm = TaskQueueManager(
inventory=inventory,
variable_manager=variable_manager,
loader=loader,
options=options,
passwords=passwords,
stdout_callback=results_callback, # Use our custom callback instead of the ``default`` callback plugin
# 如果注释掉 callback 则会调用原生的 DEFAULT_STDOUT_CALLBACK,输出 task result的output,同 ansible-playbook debug
)
result = tqm.run(play)
print result # 返回码,只要有一个 host 出错就会返回 非0 数字
finally:
if tqm is not None:
tqm.cleanup() |
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