248 lines
10 KiB
Python
248 lines
10 KiB
Python
#
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# (c) 2017 Red Hat Inc.
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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 __future__ import (absolute_import, division, print_function)
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__metaclass__ = type
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import collections
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import re
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import time
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import json
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from itertools import chain
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from ansible.module_utils._text import to_text
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from ansible.module_utils.six import iteritems
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from ansible.module_utils.network.common.config import NetworkConfig, dumps
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from ansible.module_utils.network.common.utils import to_list
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from ansible.plugins.cliconf import CliconfBase, enable_mode
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class Cliconf(CliconfBase):
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@enable_mode
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def get_config(self, source='running', filter=None, format='text'):
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if source not in ('running', 'startup'):
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return self.invalid_params("fetching configuration from %s is not supported" % source)
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if not filter:
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filter = []
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if source == 'running':
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cmd = 'show running-config '
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else:
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cmd = 'show startup-config '
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cmd += ' '.join(to_list(filter))
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cmd = cmd.strip()
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return self.send_command(cmd)
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def get_diff(self, candidate=None, running=None, match='line', diff_ignore_lines=None, path=None, replace='line'):
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"""
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Generate diff between candidate and running configuration. If the
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remote host supports onbox diff capabilities ie. supports_onbox_diff in that case
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candidate and running configurations are not required to be passed as argument.
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In case if onbox diff capability is not supported candidate argument is mandatory
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and running argument is optional.
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:param candidate: The configuration which is expected to be present on remote host.
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:param running: The base configuration which is used to generate diff.
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:param match: Instructs how to match the candidate configuration with current device configuration
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Valid values are 'line', 'strict', 'exact', 'none'.
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'line' - commands are matched line by line
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'strict' - command lines are matched with respect to position
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'exact' - command lines must be an equal match
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'none' - will not compare the candidate configuration with
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the running configuration on the remote device
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:param diff_ignore_lines: Use this argument to specify one or more lines that should be
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ignored during the diff. This is used for lines in the configuration
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that are automatically updated by the system. This argument takes
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a list of regular expressions or exact line matches.
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:param path: The ordered set of parents that uniquely identify the section or hierarchy
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the commands should be checked against. If the parents argument
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is omitted, the commands are checked against the set of top
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level or global commands.
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:param replace: Instructs on the way to perform the configuration on the device.
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If the replace argument is set to I(line) then the modified lines are
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pushed to the device in configuration mode. If the replace argument is
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set to I(block) then the entire command block is pushed to the device in
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configuration mode if any line is not correct.
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:return: Configuration diff in json format.
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{
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'config_diff': '',
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'banner_diff': ''
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}
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"""
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diff = {}
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device_operations = self.get_device_operations()
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if candidate is None and not device_operations['supports_onbox_diff']:
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raise ValueError('candidate configuration is required to generate diff')
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# prepare candidate configuration
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candidate_obj = NetworkConfig(indent=1)
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want_src, want_banners = self._extract_banners(candidate)
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candidate_obj.load(want_src)
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if running and match != 'none':
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# running configuration
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have_src, have_banners = self._extract_banners(running)
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running_obj = NetworkConfig(indent=1, contents=have_src, ignore_lines=diff_ignore_lines)
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configdiffobjs = candidate_obj.difference(running_obj, path=path, match=match, replace=replace)
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else:
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configdiffobjs = candidate_obj.items
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have_banners = {}
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configdiff = dumps(configdiffobjs, 'commands') if configdiffobjs else ''
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diff['config_diff'] = configdiff if configdiffobjs else {}
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banners = self._diff_banners(want_banners, have_banners)
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diff['banner_diff'] = banners if banners else {}
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return json.dumps(diff)
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@enable_mode
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def edit_config(self, candidate, check_mode=False, replace=None):
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if not candidate:
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raise ValueError('must provide a candidate config to load')
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if check_mode not in (True, False):
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raise ValueError('`check_mode` must be a bool, got %s' % check_mode)
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options = self.get_option_values()
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if replace and replace not in options['replace']:
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raise ValueError('`replace` value %s in invalid, valid values are %s' % (replace, options['replace']))
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results = []
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if not check_mode:
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for line in chain(['configure terminal'], to_list(candidate)):
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if not isinstance(line, collections.Mapping):
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line = {'command': line}
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cmd = line['command']
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if cmd != 'end' and cmd[0] != '!':
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results.append(self.send_command(**line))
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results.append(self.send_command('end'))
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return results[1:-1]
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def get(self, command, prompt=None, answer=None, sendonly=False):
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return self.send_command(command, prompt=prompt, answer=answer, sendonly=sendonly)
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def get_device_info(self):
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device_info = {}
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device_info['network_os'] = 'ios'
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reply = self.get('show version')
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data = to_text(reply, errors='surrogate_or_strict').strip()
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match = re.search(r'Version (\S+)', data)
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if match:
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device_info['network_os_version'] = match.group(1).strip(',')
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match = re.search(r'^Cisco (.+) \(revision', data, re.M)
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if match:
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device_info['network_os_model'] = match.group(1)
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match = re.search(r'^(.+) uptime', data, re.M)
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if match:
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device_info['network_os_hostname'] = match.group(1)
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return device_info
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def get_device_operations(self):
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return {
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'supports_replace': True,
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'supports_commit': False,
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'supports_rollback': False,
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'supports_defaults': True,
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'supports_onbox_diff': False,
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'supports_commit_comment': False,
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'supports_multiline_delimiter': False,
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'support_match': True,
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'support_diff_ignore_lines': True,
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'supports_generate_diff': True,
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}
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def get_option_values(self):
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return {
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'format': ['text'],
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'match': ['line', 'strict', 'exact', 'none'],
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'replace': ['line', 'block']
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}
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def get_capabilities(self):
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result = dict()
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result['rpc'] = self.get_base_rpc() + ['edit_banner']
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result['network_api'] = 'cliconf'
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result['device_info'] = self.get_device_info()
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result['device_operations'] = self.get_device_operations()
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result.update(self.get_option_values())
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return json.dumps(result)
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def edit_banner(self, banners, multiline_delimiter="@", check_mode=False):
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"""
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Edit banner on remote device
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:param banners: Banners to be loaded in json format
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:param multiline_delimiter: Line delimiter for banner
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:param check_mode: Boolean value that indicates if the device candidate
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configuration should be pushed in the running configuration or discarded.
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:return: Returns response of executing the configuration command received
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from remote host
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"""
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banners_obj = json.loads(banners)
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results = []
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if not check_mode:
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for key, value in iteritems(banners_obj):
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key += ' %s' % multiline_delimiter
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for cmd in ['config terminal', key, value, multiline_delimiter, 'end']:
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obj = {'command': cmd, 'sendonly': True}
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results.append(self.send_command(**obj))
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time.sleep(0.1)
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results.append(self.send_command('\n'))
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return results[1:-1]
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def _extract_banners(self, config):
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banners = {}
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banner_cmds = re.findall(r'^banner (\w+)', config, re.M)
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for cmd in banner_cmds:
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regex = r'banner %s \^C(.+?)(?=\^C)' % cmd
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match = re.search(regex, config, re.S)
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if match:
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key = 'banner %s' % cmd
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banners[key] = match.group(1).strip()
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for cmd in banner_cmds:
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regex = r'banner %s \^C(.+?)(?=\^C)' % cmd
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match = re.search(regex, config, re.S)
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if match:
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config = config.replace(str(match.group(1)), '')
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config = re.sub(r'banner \w+ \^C\^C', '!! banner removed', config)
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return config, banners
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def _diff_banners(self, want, have):
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candidate = {}
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for key, value in iteritems(want):
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if value != have.get(key):
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candidate[key] = value
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return candidate
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