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#
# (c) 2017 Red Hat Inc.
#
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
#
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
DOCUMENTATION = """
---
author: Ansible Networking Team
cliconf: eos
short_description: Use eos cliconf to run command on Arista EOS platform
description:
- This eos plugin provides low level abstraction apis for
sending and receiving CLI commands from Arista EOS network devices.
version_added: "2.4"
options:
eos_use_sessions:
type: int
default: 1
description:
- Specifies if sessions should be used on remote host or not
env:
- name: ANSIBLE_EOS_USE_SESSIONS
vars:
- name: ansible_eos_use_sessions
version_added: '2.7'
"""
import json
import time
import re
from ansible.errors import AnsibleConnectionFailure
from ansible.module_utils._text import to_text
from ansible.module_utils.common._collections_compat import Mapping
from ansible.module_utils.network.common.utils import to_list
from ansible.module_utils.network.common.config import NetworkConfig, dumps
from ansible.plugins.cliconf import CliconfBase, enable_mode
class Cliconf(CliconfBase):
def __init__(self, *args, **kwargs):
super(Cliconf, self).__init__(*args, **kwargs)
self._session_support = None
@enable_mode
def get_config(self, source='running', format='text', flags=None):
options_values = self.get_option_values()
if format not in options_values['format']:
raise ValueError("'format' value %s is invalid. Valid values are %s" % (format, ','.join(options_values['format'])))
lookup = {'running': 'running-config', 'startup': 'startup-config'}
if source not in lookup:
raise ValueError("fetching configuration from %s is not supported" % source)
cmd = 'show %s ' % lookup[source]
if format and format != 'text':
cmd += '| %s ' % format
cmd += ' '.join(to_list(flags))
cmd = cmd.strip()
return self.send_command(cmd)
@enable_mode
def edit_config(self, candidate=None, commit=True, replace=None, comment=None):
operations = self.get_device_operations()
self.check_edit_config_capability(operations, candidate, commit, replace, comment)
if (commit is False) and (not self.supports_sessions):
raise ValueError('check mode is not supported without configuration session')
resp = {}
session = None
if self.supports_sessions:
session = 'ansible_%s' % int(time.time())
resp.update({'session': session})
self.send_command('configure session %s' % session)
if replace:
self.send_command('rollback clean-config')
else:
self.send_command('configure')
results = []
requests = []
multiline = False
for line in to_list(candidate):
if not isinstance(line, Mapping):
line = {'command': line}
cmd = line['command']
if cmd == 'end':
continue
elif cmd.startswith('banner') or multiline:
multiline = True
elif cmd == 'EOF' and multiline:
multiline = False
if multiline:
line['sendonly'] = True
if cmd != 'end' and cmd[0] != '!':
try:
results.append(self.send_command(**line))
requests.append(cmd)
except AnsibleConnectionFailure as e:
self.discard_changes(session)
raise AnsibleConnectionFailure(e.message)
resp['request'] = requests
resp['response'] = results
if self.supports_sessions:
out = self.send_command('show session-config diffs')
if out:
resp['diff'] = out.strip()
if commit:
self.commit()
else:
self.discard_changes(session)
else:
self.send_command('end')
return resp
def get(self, command, prompt=None, answer=None, sendonly=False, output=None, newline=True, check_all=False):
if output:
command = self._get_command_with_output(command, output)
return self.send_command(command=command, prompt=prompt, answer=answer, sendonly=sendonly, newline=newline, check_all=check_all)
def commit(self):
self.send_command('commit')
def discard_changes(self, session=None):
commands = ['end']
if self.supports_sessions:
# to close session gracefully execute abort in top level session prompt.
commands.extend(['configure session %s' % session, 'abort'])
for cmd in commands:
self.send_command(cmd)
def run_commands(self, commands=None, check_rc=True):
if commands is None:
raise ValueError("'commands' value is required")
responses = list()
for cmd in to_list(commands):
if not isinstance(cmd, Mapping):
cmd = {'command': cmd}
output = cmd.pop('output', None)
if output:
cmd['command'] = self._get_command_with_output(cmd['command'], output)
try:
out = self.send_command(**cmd)
except AnsibleConnectionFailure as e:
if check_rc:
raise
out = getattr(e, 'err', e)
out = to_text(out, errors='surrogate_or_strict')
if out is not None:
try:
out = json.loads(out)
except ValueError:
out = out.strip()
responses.append(out)
return responses
def get_diff(self, candidate=None, running=None, diff_match='line', diff_ignore_lines=None, path=None, diff_replace='line'):
diff = {}
device_operations = self.get_device_operations()
option_values = self.get_option_values()
if candidate is None and device_operations['supports_generate_diff']:
raise ValueError("candidate configuration is required to generate diff")
if diff_match not in option_values['diff_match']:
raise ValueError("'match' value %s in invalid, valid values are %s" % (diff_match, ', '.join(option_values['diff_match'])))
if diff_replace not in option_values['diff_replace']:
raise ValueError("'replace' value %s in invalid, valid values are %s" % (diff_replace, ', '.join(option_values['diff_replace'])))
# prepare candidate configuration
candidate_obj = NetworkConfig(indent=3)
candidate_obj.load(candidate)
if running and diff_match != 'none' and diff_replace != 'config':
# running configuration
running_obj = NetworkConfig(indent=3, contents=running, ignore_lines=diff_ignore_lines)
configdiffobjs = candidate_obj.difference(running_obj, path=path, match=diff_match, replace=diff_replace)
else:
configdiffobjs = candidate_obj.items
diff['config_diff'] = dumps(configdiffobjs, 'commands') if configdiffobjs else ''
return diff
@property
def supports_sessions(self):
use_session = self.get_option('eos_use_sessions')
try:
use_session = int(use_session)
except ValueError:
pass
if not bool(use_session):
self._session_support = False
else:
if self._session_support:
return self._session_support
response = self.get('show configuration sessions')
self._session_support = 'error' not in response
return self._session_support
def get_device_info(self):
device_info = {}
device_info['network_os'] = 'eos'
reply = self.get('show version | json')
data = json.loads(reply)
device_info['network_os_version'] = data['version']
device_info['network_os_model'] = data['modelName']
reply = self.get('show hostname | json')
data = json.loads(reply)
device_info['network_os_hostname'] = data['hostname']
try:
reply = self.get('bash timeout 5 cat /mnt/flash/boot-config')
match = re.search(r'SWI=(.+)$', reply, re.M)
if match:
device_info['network_os_image'] = match.group(1)
except AnsibleConnectionFailure:
# This requires enable mode to run
self._connection.queue_message('vvv', "Unable to gather network_os_image without enable mode")
return device_info
def get_device_operations(self):
return {
'supports_diff_replace': True,
'supports_commit': True if self.supports_sessions else False,
'supports_rollback': False,
'supports_defaults': False,
'supports_onbox_diff': True if self.supports_sessions else False,
'supports_commit_comment': False,
'supports_multiline_delimiter': False,
'supports_diff_match': True,
'supports_diff_ignore_lines': True,
'supports_generate_diff': False if self.supports_sessions else True,
'supports_replace': True if self.supports_sessions else False
}
def get_option_values(self):
return {
'format': ['text', 'json'],
'diff_match': ['line', 'strict', 'exact', 'none'],
'diff_replace': ['line', 'block', 'config'],
'output': ['text', 'json']
}
def get_capabilities(self):
result = super(Cliconf, self).get_capabilities()
result['rpc'] += ['commit', 'discard_changes', 'get_diff', 'run_commands', 'supports_sessions']
result['device_operations'] = self.get_device_operations()
result.update(self.get_option_values())
return json.dumps(result)
def _get_command_with_output(self, command, output):
options_values = self.get_option_values()
if output not in options_values['output']:
raise ValueError("'output' value %s is invalid. Valid values are %s" % (output, ','.join(options_values['output'])))
if output == 'json' and not command.endswith('| json'):
cmd = '%s | json' % command
else:
cmd = command
return cmd
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