mirror of https://github.com/ansible/ansible.git
Network Module: EOS (#16158)
* add new module network * move EOS to NetworkModule * shell.py Python 3.x compatibility * implements the Command class through the connection for eos This implements a new Command class that specifies the cli command and output format. This removes the need to batch commands through the connection * initial add of netcmd modulepull/16371/head
Nathaniel Case
9 years ago
committed by
GitHub
parent
17447ff035
commit
5dccff29bf
@ -0,0 +1,202 @@
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#
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# (c) 2015 Peter Sprygada, <psprygada@ansible.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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import re
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import time
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import collections
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import itertools
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import shlex
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from ansible.module_utils.basic import BOOLEANS_TRUE, BOOLEANS_FALSE
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class Conditional(object):
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"""Used in command modules to evaluate waitfor conditions
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"""
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OPERATORS = {
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'eq': ['eq', '=='],
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'neq': ['neq', 'ne', '!='],
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'gt': ['gt', '>'],
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'ge': ['ge', '>='],
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'lt': ['lt', '<'],
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'le': ['le', '<='],
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'contains': ['contains'],
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'matches': ['matches']
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}
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def __init__(self, conditional, encoding='json'):
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self.raw = conditional
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self.encoding = encoding
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key, op, val = shlex.split(conditional)
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self.key = key
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self.func = self.func(op)
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self.value = self._cast_value(val)
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def __call__(self, data):
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value = self.get_value(dict(result=data))
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return self.func(value)
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def _cast_value(self, value):
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if value in BOOLEANS_TRUE:
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return True
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elif value in BOOLEANS_FALSE:
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return False
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elif re.match(r'^\d+\.d+$', value):
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return float(value)
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elif re.match(r'^\d+$', value):
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return int(value)
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else:
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return unicode(value)
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def func(self, oper):
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for func, operators in self.OPERATORS.items():
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if oper in operators:
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return getattr(self, func)
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raise AttributeError('unknown operator: %s' % oper)
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def get_value(self, result):
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if self.encoding in ['json', 'text']:
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return self.get_json(result)
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elif self.encoding == 'xml':
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return self.get_xml(result.get('result'))
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def get_xml(self, result):
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parts = self.key.split('.')
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value_index = None
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match = re.match(r'^\S+(\[)(\d+)\]', parts[-1])
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if match:
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start, end = match.regs[1]
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parts[-1] = parts[-1][0:start]
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value_index = int(match.group(2))
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path = '/'.join(parts[1:])
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path = '/%s' % path
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path += '/text()'
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index = int(re.match(r'result\[(\d+)\]', parts[0]).group(1))
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values = result[index].xpath(path)
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if value_index is not None:
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return values[value_index].strip()
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return [v.strip() for v in values]
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def get_json(self, result):
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parts = re.split(r'\.(?=[^\]]*(?:\[|$))', self.key)
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for part in parts:
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match = re.findall(r'\[(\S+?)\]', part)
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if match:
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key = part[:part.find('[')]
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result = result[key]
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for m in match:
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try:
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m = int(m)
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except ValueError:
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m = str(m)
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result = result[m]
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else:
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result = result.get(part)
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return result
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def number(self, value):
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if '.' in str(value):
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return float(value)
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else:
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return int(value)
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def eq(self, value):
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return value == self.value
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def neq(self, value):
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return value != self.value
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def gt(self, value):
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return self.number(value) > self.value
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def ge(self, value):
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return self.number(value) >= self.value
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def lt(self, value):
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return self.number(value) < self.value
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def le(self, value):
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return self.number(value) <= self.value
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def contains(self, value):
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return str(self.value) in value
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def matches(self, value):
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match = re.search(value, self.value, re.M)
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return match is not None
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class FailedConditionsError(Exception):
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def __init__(self, msg, failed_conditions):
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super(FailedConditionsError, self).__init__(msg)
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self.failed_conditions = failed_conditions
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class CommandRunner(collections.Mapping):
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def __init__(self, module):
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self.module = module
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self.items = dict()
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self.conditionals = set()
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self.retries = 10
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self.interval = 1
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def __getitem__(self, key):
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return self.items[key]
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def __len__(self):
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return len(self.items)
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def __iter__(self):
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return iter(self.items)
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def add_command(self, command, output=None):
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self.module.cli.add_commands(command, output=output)
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def add_conditional(self, condition):
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self.conditionals.add(Conditional(condition))
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def run_commands(self):
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responses = self.module.cli.run_commands()
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for cmd, resp in itertools.izip(self.module.cli.commands, responses):
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self.items[str(cmd)] = resp
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def run(self):
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while self.retries > 0:
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self.run_commands()
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for item in list(self.conditionals):
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if item(self.items.values()):
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self.conditionals.remove(item)
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if not self.conditionals:
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break
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time.sleep(self.interval)
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self.retries -= 1
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else:
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failed_conditions = [item.raw for item in self.conditionals]
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raise FailedConditionsError('timeout waiting for value', failed_conditions)
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@ -0,0 +1,282 @@
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#
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# (c) 2015 Peter Sprygada, <psprygada@ansible.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.module_utils.basic import AnsibleModule
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from ansible.module_utils.basic import env_fallback, get_exception
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from ansible.module_utils.shell import Shell, ShellError, HAS_PARAMIKO
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NET_TRANSPORT_ARGS = dict(
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host=dict(required=True),
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port=dict(type='int'),
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username=dict(fallback=(env_fallback, ['ANSIBLE_NET_USERNAME'])),
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password=dict(no_log=True, fallback=(env_fallback, ['ANSIBLE_NET_PASSWORD'])),
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ssh_keyfile=dict(fallback=(env_fallback, ['ANSIBLE_NET_SSH_KEYFILE']), type='path'),
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authorize=dict(default=False, fallback=(env_fallback, ['ANSIBLE_NET_AUTHORIZE']), type='bool'),
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auth_pass=dict(no_log=True, fallback=(env_fallback, ['ANSIBLE_NET_AUTH_PASS'])),
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provider=dict(type='dict'),
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transport=dict(choices=list()),
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timeout=dict(default=10, type='int')
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)
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NET_CONNECTION_ARGS = dict()
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NET_CONNECTIONS = dict()
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def to_list(val):
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if isinstance(val, (list, tuple)):
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return list(val)
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elif val is not None:
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return [val]
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else:
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return list()
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def connect(module):
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try:
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if not module.connected:
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module.connection.connect(module.params)
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if module.params['authorize']:
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module.connection.authorize(module.params)
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except NetworkError:
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exc = get_exception()
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module.fail_json(msg=exc.message)
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def disconnect(module):
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try:
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if module.connected:
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module.connection.disconnect()
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except NetworkError:
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exc = get_exception()
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module.fail_json(msg=exc.message)
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class Command(object):
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def __init__(self, command, output=None, prompt=None, response=None):
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self.command = command
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self.output = output
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self.prompt = prompt
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self.response = response
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self.conditions = set()
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def __str__(self):
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return self.command
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class Cli(object):
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def __init__(self, connection):
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self.connection = connection
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self.default_output = connection.default_output or 'text'
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self.commands = list()
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def __call__(self, commands, output=None):
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commands = self.to_command(commands, output)
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return self.connection.run_commands(commands)
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def to_command(self, commands, output=None):
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output = output or self.default_output
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objects = list()
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for cmd in to_list(commands):
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if not isinstance(cmd, Command):
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cmd = Command(cmd, output)
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objects.append(cmd)
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return objects
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def add_commands(self, commands, output=None):
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commands = self.to_command(commands, output)
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self.commands.extend(commands)
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def run_commands(self):
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return self.connection.run_commands(self.commands)
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class Config(object):
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def __init__(self, connection):
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self.connection = connection
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def invoke(self, method, *args, **kwargs):
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try:
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return method(*args, **kwargs)
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except AttributeError:
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exc = get_exception()
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raise NetworkError('undefined method "%s"' % method.__name__, exc=str(exc))
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except NetworkError:
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if raise_exc:
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raise
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exc = get_exception()
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self.fail_json(msg=exc.message, **exc.kwargs)
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except NotImplementedError:
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raise NetworkError('method not supported "%s"' % method.__name__)
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def __call__(self, commands):
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lines = to_list(commands)
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return self.invoke(self.connection.configure, commands)
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def load_config(self, commands, **kwargs):
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commands = to_list(commands)
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return self.invoke(self.connection.load_config, commands, **kwargs)
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def get_config(self, **kwargs):
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return self.invoke(self.connection.get_config, **kwargs)
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def commit_config(self, **kwargs):
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return self.invoke(self.connection.commit_config, **kwargs)
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def abort_config(self, **kwargs):
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return self.invoke(self.connection.abort_config, **kwargs)
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def save_config(self):
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return self.invoke(self.connection.save_config)
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class NetworkError(Exception):
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def __init__(self, msg, **kwargs):
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super(NetworkError, self).__init__(msg)
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self.kwargs = kwargs
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class NetworkModule(AnsibleModule):
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def __init__(self, *args, **kwargs):
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super(NetworkModule, self).__init__(*args, **kwargs)
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self.connection = None
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self._cli = None
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self._config = None
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@property
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def cli(self):
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if not self.connected:
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connect(self)
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if self._cli:
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return self._cli
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self._cli = Cli(self.connection)
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return self._cli
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@property
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def config(self):
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if not self.connected:
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connect(self)
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if self._config:
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return self._config
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self._config = Config(self.connection)
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return self._config
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@property
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def connected(self):
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return self.connection._connected
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def _load_params(self):
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super(NetworkModule, self)._load_params()
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provider = self.params.get('provider') or dict()
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for key, value in provider.items():
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for args in [NET_TRANSPORT_ARGS, NET_CONNECTION_ARGS]:
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if key in args:
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if self.params.get(key) is None and value is not None:
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self.params[key] = value
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class NetCli(object):
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"""Basic paramiko-based ssh transport any NetworkModule can use."""
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def __init__(self):
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if not HAS_PARAMIKO:
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raise NetworkError(
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msg='paramiko is required but does not appear to be installed. '
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'It can be installed using `pip install paramiko`'
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)
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self.shell = None
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self._connected = False
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self.default_output = 'text'
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def connect(self, params, kickstart, **kwargs):
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host = params['host']
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port = params.get('port') or 22
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username = params['username']
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password = params.get('password')
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key_file = params.get('ssh_keyfile')
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timeout = params['timeout']
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try:
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self.shell = Shell(
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kickstart=kickstart,
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prompts_re=self.CLI_PROMPTS_RE,
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errors_re=self.CLI_ERRORS_RE,
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)
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self.shell.open(
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host, port=port, username=username, password=password,
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key_filename=key_file, timeout=timeout,
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)
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except ShellError:
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exc = get_exception()
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raise NetworkError(
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msg='failed to connect to %s:%s' % (host, port), exc=str(exc)
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)
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def disconnect(self, **kwargs):
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self._connected = False
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self.shell.close()
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def execute(self, commands, **kwargs):
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try:
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return self.shell.send(commands)
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except ShellError:
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exc = get_exception()
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raise NetworkError(exc.message, commands=commands)
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def get_module(connect_on_load=True, **kwargs):
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argument_spec = NET_TRANSPORT_ARGS.copy()
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argument_spec['transport']['choices'] = NET_CONNECTIONS.keys()
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argument_spec.update(NET_CONNECTION_ARGS.copy())
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if kwargs.get('argument_spec'):
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argument_spec.update(kwargs['argument_spec'])
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kwargs['argument_spec'] = argument_spec
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module = NetworkModule(**kwargs)
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try:
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transport = module.params['transport'] or '__default__'
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cls = NET_CONNECTIONS[transport]
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module.connection = cls()
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except KeyError:
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module.fail_json(msg='Unknown transport or no default transport specified')
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except (TypeError, NetworkError):
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exc = get_exception()
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module.fail_json(msg=exc.message)
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if connect_on_load:
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connect(module)
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return module
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def register_transport(transport, default=False):
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def register(cls):
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NET_CONNECTIONS[transport] = cls
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if default:
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NET_CONNECTIONS['__default__'] = cls
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return cls
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return register
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def add_argument(key, value):
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NET_CONNECTION_ARGS[key] = value
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