如何在Ansible v2中运行playbook api

Question

我想通过Ansible V2 python api运行正确的playbook。这里是我的方法：

from ansible.parsing.dataloader import DataLoader 
from ansible.vars import VariableManager 
from ansible.inventory import Inventory 
from ansible.executor.playbook_executor import PlaybookExecutor 
variable_manager = VariableManager() 

loader = DataLoader() 

inventory = Inventory(loader=loader, variable_manager=variable_manager,     host_list='/path/to/inventory') 
playbook_path = '/path/to/playbook' 

Options = namedtuple('Options', ['listtags', 'listtasks', 'listhosts', 'syntax', 'connection','module_path', 'forks', 'remote_user', 'private_key_file', 'ssh_common_args', 'ssh_extra_args', 'sftp_extra_args', 'scp_extra_args', 'become', 'become_method', 'become_user', 'verbosity', 'check']) 

options = Options(listtags=False, listtasks=False, listhosts=False, syntax=False, connection='ssh', module_path=None, forks=100, remote_user='ubuntu', private_key_file=ssh_key_file, ssh_common_args=None, ssh_extra_args=None, sftp_extra_args=None, scp_extra_args=None, become=True, become_method='sudo', become_user='root', verbosity=None, check=False) 
variable_manager.extra_vars = {'hosts': 'mywebserver'} 

passwords = {} 

pbex = PlaybookExecutor(playbooks=[playbook_path], inventory=inventory,  variable_manager=variable_manager, loader=loader, options=options,  passwords=passwords) 
results = pbex.run() 

但它不能正常运行，并给我下面的错误消息：

TASK [jetty : Create default variables for jetty] ****************************** 
fatal: [172.17.21.52]: FAILED! => {"changed": false, "failed": true, "msg": "AnsibleUndefinedVariable: 'groups' is undefined"} 

在这种TASK我有一个template Jinja2的文件与它的变量groups['xxxx'] 。我认为这是Ansible内置的组变量。任何人都可以告诉它为什么会发生，以及如何解决它。提前致谢。

Answer 1

加载库存后，请将variable_manager设置为使用该库存。

从Python API - Ansible（第19行）：

variable_manager.set_inventory(inventory)