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321 lines
13 KiB
Python
321 lines
13 KiB
Python
# (c) 2012, Michael DeHaan <michael.dehaan@gmail.com>
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#
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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#############################################
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from ansible import utils
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from ansible import errors
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from ansible.playbook.task import Task
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import shlex
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import os
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class Play(object):
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__slots__ = [
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'hosts', 'name', 'vars', 'vars_prompt', 'vars_files',
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'handlers', 'remote_user', 'remote_port',
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'sudo', 'sudo_user', 'transport', 'playbook',
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'tags', 'gather_facts', 'serial', '_ds', '_handlers', '_tasks',
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'basedir'
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]
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# to catch typos and so forth -- these are userland names
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# and don't line up 1:1 with how they are stored
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VALID_KEYS = [
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'hosts', 'name', 'vars', 'vars_prompt', 'vars_files',
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'tasks', 'handlers', 'user', 'port', 'include',
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'sudo', 'sudo_user', 'connection', 'tags', 'gather_facts', 'serial'
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]
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# *************************************************
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def __init__(self, playbook, ds, basedir):
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''' constructor loads from a play datastructure '''
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for x in ds.keys():
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if not x in Play.VALID_KEYS:
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raise errors.AnsibleError("%s is not a legal parameter in an Ansible Playbook" % x)
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# TODO: more error handling
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hosts = ds.get('hosts')
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if hosts is None:
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raise errors.AnsibleError('hosts declaration is required')
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elif isinstance(hosts, list):
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hosts = ';'.join(hosts)
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hosts = utils.template(basedir, hosts, playbook.extra_vars)
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self._ds = ds
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self.playbook = playbook
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self.basedir = basedir
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self.hosts = hosts
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self.name = ds.get('name', self.hosts)
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self.vars = ds.get('vars', {})
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self.vars_files = ds.get('vars_files', [])
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self.vars_prompt = ds.get('vars_prompt', {})
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self.vars = self._get_vars()
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self._tasks = ds.get('tasks', [])
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self._handlers = ds.get('handlers', [])
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self.remote_user = utils.template(basedir, ds.get('user', self.playbook.remote_user), playbook.extra_vars)
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self.remote_port = ds.get('port', self.playbook.remote_port)
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self.sudo = ds.get('sudo', self.playbook.sudo)
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self.sudo_user = utils.template(basedir, ds.get('sudo_user', self.playbook.sudo_user), playbook.extra_vars)
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self.transport = ds.get('connection', self.playbook.transport)
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self.tags = ds.get('tags', None)
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self.gather_facts = ds.get('gather_facts', None)
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self.serial = ds.get('serial', 0)
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self._update_vars_files_for_host(None)
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self._tasks = self._load_tasks(self._ds, 'tasks')
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self._handlers = self._load_tasks(self._ds, 'handlers')
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if self.tags is None:
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self.tags = []
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elif type(self.tags) in [ str, unicode ]:
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self.tags = [ self.tags ]
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elif type(self.tags) != list:
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self.tags = []
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if self.sudo_user != 'root':
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self.sudo = True
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# *************************************************
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def _load_tasks(self, ds, keyname):
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''' handle task and handler include statements '''
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tasks = ds.get(keyname, [])
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results = []
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for x in tasks:
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if 'include' in x:
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task_vars = self.vars.copy()
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tokens = shlex.split(x['include'])
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if 'with_items' in x:
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items = utils.varReplaceWithItems(self.basedir, x['with_items'], task_vars)
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else:
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items = ['']
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for item in items:
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mv = task_vars.copy()
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mv['item'] = item
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for t in tokens[1:]:
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(k,v) = t.split("=", 1)
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mv[k] = utils.varReplaceWithItems(self.basedir, v, mv)
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include_file = utils.template(self.basedir, tokens[0], mv)
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data = utils.parse_yaml_from_file(utils.path_dwim(self.basedir, include_file))
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for y in data:
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results.append(Task(self,y,module_vars=mv.copy()))
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elif type(x) == dict:
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task_vars = self.vars.copy()
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results.append(Task(self,x,module_vars=task_vars))
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else:
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raise Exception("unexpected task type")
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for x in results:
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if self.tags is not None:
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x.tags.extend(self.tags)
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return results
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# *************************************************
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def tasks(self):
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''' return task objects for this play '''
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return self._tasks
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def handlers(self):
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''' return handler objects for this play '''
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return self._handlers
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# *************************************************
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def _get_vars(self):
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''' load the vars section from a play, accounting for all sorts of variable features
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including loading from yaml files, prompting, and conditional includes of the first
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file found in a list. '''
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if self.vars is None:
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self.vars = {}
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if type(self.vars) not in [dict, list]:
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raise errors.AnsibleError("'vars' section must contain only key/value pairs")
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vars = self.playbook.global_vars
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# translate a list of vars into a dict
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if type(self.vars) == list:
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for item in self.vars:
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if getattr(item, 'items', None) is None:
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raise errors.AnsibleError("expecting a key-value pair in 'vars' section")
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k, v = item.items()[0]
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vars[k] = v
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else:
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vars.update(self.vars)
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if type(self.vars_prompt) == list:
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for var in self.vars_prompt:
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if not 'name' in var:
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raise errors.AnsibleError("'vars_prompt' item is missing 'name:'")
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vname = var['name']
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prompt = var.get("prompt", vname)
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private = var.get("private", True)
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confirm = var.get("confirm", False)
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encrypt = var.get("encrypt", None)
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salt_size = var.get("salt_size", None)
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salt = var.get("salt", None)
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vars[vname] = self.playbook.callbacks.on_vars_prompt(vname, private, prompt,encrypt, confirm, salt_size, salt)
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elif type(self.vars_prompt) == dict:
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for (vname, prompt) in self.vars_prompt.iteritems():
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prompt_msg = "%s: " % prompt
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vars[vname] = self.playbook.callbacks.on_vars_prompt(varname=vname, private=False, prompt=prompt_msg)
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else:
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raise errors.AnsibleError("'vars_prompt' section is malformed, see docs")
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results = self.playbook.extra_vars.copy()
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results.update(vars)
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return results
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# *************************************************
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def update_vars_files(self, hosts):
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''' calculate vars_files, which requires that setup runs first so ansible facts can be mixed in '''
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# now loop through all the hosts...
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for h in hosts:
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self._update_vars_files_for_host(h)
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# *************************************************
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def compare_tags(self, tags):
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''' given a list of tags that the user has specified, return two lists:
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matched_tags: tags were found within the current play and match those given
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by the user
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unmatched_tags: tags that were found within the current play but do not match
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any provided by the user '''
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# gather all the tags in all the tasks into one list
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all_tags = []
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for task in self._tasks:
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all_tags.extend(task.tags)
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# compare the lists of tags using sets and return the matched and unmatched
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all_tags_set = set(all_tags)
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tags_set = set(tags)
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matched_tags = all_tags_set & tags_set
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unmatched_tags = all_tags_set - tags_set
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return matched_tags, unmatched_tags
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# *************************************************
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def _has_vars_in(self, msg):
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return ((msg.find("$") != -1) or (msg.find("{{") != -1))
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# *************************************************
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def _update_vars_files_for_host(self, host):
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if type(self.vars_files) != list:
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self.vars_files = [ self.vars_files ]
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if (host is not None):
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self.playbook.SETUP_CACHE[host].update(self.vars)
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inventory = self.playbook.inventory
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hostrec = inventory.get_host(host)
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groupz = sorted(inventory.groups_for_host(host), key=lambda g: g.depth)
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groups = [ g.name for g in groupz ]
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basedir = inventory.basedir()
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if basedir is not None:
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for x in groups:
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path = os.path.join(basedir, "group_vars/%s" % x)
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if os.path.exists(path):
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data = utils.parse_yaml_from_file(path)
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if type(data) != dict:
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raise errors.AnsibleError("%s must be stored as a dictionary/hash" % path)
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self.playbook.SETUP_CACHE[host].update(data)
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path = os.path.join(basedir, "host_vars/%s" % hostrec.name)
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if os.path.exists(path):
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data = utils.parse_yaml_from_file(path)
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if type(data) != dict:
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raise errors.AnsibleError("%s must be stored as a dictionary/hash" % path)
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self.playbook.SETUP_CACHE[host].update(data)
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for filename in self.vars_files:
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if type(filename) == list:
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# loop over all filenames, loading the first one, and failing if # none found
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found = False
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sequence = []
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for real_filename in filename:
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filename2 = utils.template(self.basedir, real_filename, self.vars)
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filename3 = filename2
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if host is not None:
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filename3 = utils.template(self.basedir, filename2, self.playbook.SETUP_CACHE[host])
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filename4 = utils.path_dwim(self.basedir, filename3)
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sequence.append(filename4)
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if os.path.exists(filename4):
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found = True
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data = utils.parse_yaml_from_file(filename4)
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if type(data) != dict:
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raise errors.AnsibleError("%s must be stored as a dictionary/hash" % filename4)
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if host is not None:
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if self._has_vars_in(filename2) and not self._has_vars_in(filename3):
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# this filename has variables in it that were fact specific
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# so it needs to be loaded into the per host SETUP_CACHE
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self.playbook.SETUP_CACHE[host].update(data)
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self.playbook.callbacks.on_import_for_host(host, filename4)
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elif not self._has_vars_in(filename4):
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# found a non-host specific variable, load into vars and NOT
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# the setup cache
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self.vars.update(data)
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elif host is not None:
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self.playbook.callbacks.on_not_import_for_host(host, filename4)
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if found:
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break
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if not found:
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raise errors.AnsibleError(
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"%s: FATAL, no files matched for vars_files import sequence: %s" % (host, sequence)
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)
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else:
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# just one filename supplied, load it!
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filename2 = utils.template(self.basedir, filename, self.vars)
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filename3 = filename2
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if host is not None:
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filename3 = utils.template(self.basedir, filename2, self.playbook.SETUP_CACHE[host])
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filename4 = utils.path_dwim(self.basedir, filename3)
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if self._has_vars_in(filename4):
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continue
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new_vars = utils.parse_yaml_from_file(filename4)
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if new_vars:
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if type(new_vars) != dict:
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raise errors.AnsibleError("%s must be stored as dictonary/hash: %s" % filename4)
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if host is not None and self._has_vars_in(filename2) and not self._has_vars_in(filename3):
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# running a host specific pass and has host specific variables
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# load into setup cache
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self.playbook.SETUP_CACHE[host].update(new_vars)
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elif host is None:
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# running a non-host specific pass and we can update the global vars instead
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self.vars.update(new_vars)
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