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Refactor common network shared and platform utils code into package (#33452)

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* Refactor common network shared and platform specific code into package (part-1)

As per proposal #76 refactor common network shared and platform specific
code into sub-package.
https://github.com/ansible/proposals/issues/76

*  ansible.module_utils.network.common - command shared functions
*  ansible.module_utils.network.{{ platform }} - where platform is platform specific shared functions

*  Fix review comments

* Fix review comments
This commit is contained in:
Ganesh Nalawade 2017-12-03 21:42:30 +05:30 • committed by GitHub
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#
# This code is part of Ansible, but is an independent component.
#
# This particular file snippet, and this file snippet only, is BSD licensed.
# Modules you write using this snippet, which is embedded dynamically by Ansible
# still belong to the author of the module, and may assign their own license
# to the complete work.
#
# (c) 2017 Red Hat, Inc.
#
# Redistribution and use in source and binary forms, with or without modification,
# are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
# USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
import os
import time
from ansible.module_utils._text import to_text, to_native
from ansible.module_utils.basic import env_fallback, return_values
from ansible.module_utils.connection import exec_command
from ansible.module_utils.network.common.utils import to_list, ComplexList
from ansible.module_utils.six import iteritems
from ansible.module_utils.urls import fetch_url
_DEVICE_CONNECTION = None
eos_provider_spec = {
'host': dict(),
'port': dict(type='int'),
'username': dict(fallback=(env_fallback, ['ANSIBLE_NET_USERNAME'])),
'password': dict(fallback=(env_fallback, ['ANSIBLE_NET_PASSWORD']), no_log=True),
'ssh_keyfile': dict(fallback=(env_fallback, ['ANSIBLE_NET_SSH_KEYFILE']), type='path'),
'authorize': dict(fallback=(env_fallback, ['ANSIBLE_NET_AUTHORIZE']), type='bool'),
'auth_pass': dict(no_log=True, fallback=(env_fallback, ['ANSIBLE_NET_AUTH_PASS'])),
'use_ssl': dict(default=True, type='bool'),
'validate_certs': dict(default=True, type='bool'),
'timeout': dict(type='int'),
'transport': dict(default='cli', choices=['cli', 'eapi'])
}
eos_argument_spec = {
'provider': dict(type='dict', options=eos_provider_spec),
}
eos_top_spec = {
'host': dict(removed_in_version=2.9),
'port': dict(removed_in_version=2.9, type='int'),
'username': dict(removed_in_version=2.9),
'password': dict(removed_in_version=2.9, no_log=True),
'ssh_keyfile': dict(removed_in_version=2.9, type='path'),
'authorize': dict(fallback=(env_fallback, ['ANSIBLE_NET_AUTHORIZE']), type='bool'),
'auth_pass': dict(removed_in_version=2.9, no_log=True),
'use_ssl': dict(removed_in_version=2.9, type='bool'),
'validate_certs': dict(removed_in_version=2.9, type='bool'),
'timeout': dict(removed_in_version=2.9, type='int'),
'transport': dict(removed_in_version=2.9, choices=['cli', 'eapi'])
}
eos_argument_spec.update(eos_top_spec)
def get_provider_argspec():
return eos_provider_spec
def check_args(module, warnings):
pass
def load_params(module):
provider = module.params.get('provider') or dict()
for key, value in iteritems(provider):
if key in eos_argument_spec:
if module.params.get(key) is None and value is not None:
module.params[key] = value
def get_connection(module):
global _DEVICE_CONNECTION
if not _DEVICE_CONNECTION:
load_params(module)
if is_eapi(module):
conn = Eapi(module)
else:
conn = Cli(module)
_DEVICE_CONNECTION = conn
return _DEVICE_CONNECTION
class Cli:
def __init__(self, module):
self._module = module
self._device_configs = {}
self._session_support = None
@property
def supports_sessions(self):
if self._session_support is not None:
return self._session_support
rc, out, err = self.exec_command('show configuration sessions')
self._session_support = rc == 0
return self._session_support
def exec_command(self, command):
if isinstance(command, dict):
command = self._module.jsonify(command)
return exec_command(self._module, command)
def get_config(self, flags=None):
"""Retrieves the current config from the device or cache
"""
flags = [] if flags is None else flags
cmd = 'show running-config '
cmd += ' '.join(flags)
cmd = cmd.strip()
try:
return self._device_configs[cmd]
except KeyError:
conn = get_connection(self)
rc, out, err = self.exec_command(cmd)
out = to_text(out, errors='surrogate_then_replace')
if rc != 0:
self._module.fail_json(msg=to_text(err, errors='surrogate_then_replace'))
cfg = str(out).strip()
self._device_configs[cmd] = cfg
return cfg
def run_commands(self, commands, check_rc=True):
"""Run list of commands on remote device and return results
"""
responses = list()
for cmd in to_list(commands):
rc, out, err = self.exec_command(cmd)
out = to_text(out, errors='surrogate_then_replace')
if check_rc and rc != 0:
self._module.fail_json(msg=to_text(err, errors='surrogate_then_replace'))
try:
out = self._module.from_json(out)
except ValueError:
out = str(out).strip()
responses.append(out)
return responses
def send_config(self, commands):
multiline = False
rc = 0
for command in to_list(commands):
if command == 'end':
continue
if command.startswith('banner') or multiline:
multiline = True
command = self._module.jsonify({'command': command, 'sendonly': True})
elif command == 'EOF' and multiline:
multiline = False
rc, out, err = self.exec_command(command)
if rc != 0:
return (rc, out, to_text(err, errors='surrogate_then_replace'))
return (rc, 'ok', '')
def configure(self, commands):
"""Sends configuration commands to the remote device
"""
conn = get_connection(self)
rc, out, err = self.exec_command('configure')
if rc != 0:
self._module.fail_json(msg='unable to enter configuration mode', output=to_text(err, errors='surrogate_then_replace'))
rc, out, err = self.send_config(commands)
if rc != 0:
self.exec_command('abort')
self._module.fail_json(msg=to_text(err, errors='surrogate_then_replace'))
self.exec_command('end')
return {}
def load_config(self, commands, commit=False, replace=False):
"""Loads the config commands onto the remote device
"""
use_session = os.getenv('ANSIBLE_EOS_USE_SESSIONS', True)
try:
use_session = int(use_session)
except ValueError:
pass
if not all((bool(use_session), self.supports_sessions)):
return self.configure(self, commands)
conn = get_connection(self)
session = 'ansible_%s' % int(time.time())
result = {'session': session}
rc, out, err = self.exec_command('configure session %s' % session)
if rc != 0:
self._module.fail_json(msg='unable to enter configuration mode', output=to_text(err, errors='surrogate_then_replace'))
if replace:
self.exec_command('rollback clean-config')
rc, out, err = self.send_config(commands)
if rc != 0:
self.exec_command('abort')
self._module.fail_json(msg=to_text(err, errors='surrogate_then_replace'), commands=commands)
rc, out, err = self.exec_command('show session-config diffs')
if rc == 0 and out:
result['diff'] = to_text(out, errors='surrogate_then_replace').strip()
if commit:
self.exec_command('commit')
else:
self.exec_command('abort')
return result
class Eapi:
def __init__(self, module):
self._module = module
self._enable = None
self._session_support = None
self._device_configs = {}
host = module.params['provider']['host']
port = module.params['provider']['port']
self._module.params['url_username'] = self._module.params['username']
self._module.params['url_password'] = self._module.params['password']
if module.params['provider']['use_ssl']:
proto = 'https'
else:
proto = 'http'
module.params['validate_certs'] = module.params['provider']['validate_certs']
self._url = '%s://%s:%s/command-api' % (proto, host, port)
if module.params['auth_pass']:
self._enable = {'cmd': 'enable', 'input': module.params['auth_pass']}
else:
self._enable = 'enable'
@property
def supports_sessions(self):
if self._session_support:
return self._session_support
response = self.send_request(['show configuration sessions'])
self._session_support = 'error' not in response
return self._session_support
def _request_builder(self, commands, output, reqid=None):
params = dict(version=1, cmds=commands, format=output)
return dict(jsonrpc='2.0', id=reqid, method='runCmds', params=params)
def send_request(self, commands, output='text'):
commands = to_list(commands)
if self._enable:
commands.insert(0, self._enable)
body = self._request_builder(commands, output)
data = self._module.jsonify(body)
headers = {'Content-Type': 'application/json-rpc'}
timeout = self._module.params['timeout']
response, headers = fetch_url(
self._module, self._url, data=data, headers=headers,
method='POST', timeout=timeout
)
if headers['status'] != 200:
self._module.fail_json(**headers)
try:
data = response.read()
response = self._module.from_json(to_text(data, errors='surrogate_then_replace'))
except ValueError:
self._module.fail_json(msg='unable to load response from device', data=data)
if self._enable and 'result' in response:
response['result'].pop(0)
return response
def run_commands(self, commands):
"""Runs list of commands on remote device and returns results
"""
output = None
queue = list()
responses = list()
def _send(commands, output):
response = self.send_request(commands, output=output)
if 'error' in response:
err = response['error']
self._module.fail_json(msg=err['message'], code=err['code'])
return response['result']
for item in to_list(commands):
if is_json(item['command']):
item['command'] = str(item['command']).replace('| json', '')
item['output'] = 'json'
if output and output != item['output']:
responses.extend(_send(queue, output))
queue = list()
output = item['output'] or 'json'
queue.append(item['command'])
if queue:
responses.extend(_send(queue, output))
for index, item in enumerate(commands):
try:
responses[index] = responses[index]['output'].strip()
except KeyError:
pass
return responses
def get_config(self, flags=None):
"""Retrieves the current config from the device or cache
"""
flags = [] if flags is None else flags
cmd = 'show running-config '
cmd += ' '.join(flags)
cmd = cmd.strip()
try:
return self._device_configs[cmd]
except KeyError:
out = self.send_request(cmd)
cfg = str(out['result'][0]['output']).strip()
self._device_configs[cmd] = cfg
return cfg
def configure(self, commands):
"""Sends the ordered set of commands to the device
"""
cmds = ['configure terminal']
cmds.extend(commands)
responses = self.send_request(commands)
if 'error' in responses:
err = responses['error']
self._module.fail_json(msg=err['message'], code=err['code'])
return responses[1:]
def load_config(self, config, commit=False, replace=False):
"""Loads the configuration onto the remote devices
If the device doesn't support configuration sessions, this will
fallback to using configure() to load the commands. If that happens,
there will be no returned diff or session values
"""
if not self.supports_sessions:
return self.configure(self, config)
session = 'ansible_%s' % int(time.time())
result = {'session': session}
commands = ['configure session %s' % session]
if replace:
commands.append('rollback clean-config')
commands.extend(config)
response = self.send_request(commands)
if 'error' in response:
commands = ['configure session %s' % session, 'abort']
self.send_request(commands)
err = response['error']
self._module.fail_json(msg=err['message'], code=err['code'])
commands = ['configure session %s' % session, 'show session-config diffs']
if commit:
commands.append('commit')
else:
commands.append('abort')
response = self.send_request(commands, output='text')
diff = response['result'][1]['output']
if len(diff) > 0:
result['diff'] = diff
return result
def is_json(cmd):
return to_native(cmd, errors='surrogate_then_replace').endswith('| json')
def is_eapi(module):
transport = module.params['transport']
provider_transport = (module.params['provider'] or {}).get('transport')
return 'eapi' in (transport, provider_transport)
def to_command(module, commands):
if is_eapi(module):
default_output = 'json'
else:
default_output = 'text'
transform = ComplexList(dict(
command=dict(key=True),
output=dict(default=default_output),
prompt=dict(),
answer=dict()
), module)
return transform(to_list(commands))
def get_config(module, flags=None):
flags = None if flags is None else flags
conn = get_connection(module)
return conn.get_config(flags)
def run_commands(module, commands):
conn = get_connection(module)
return conn.run_commands(to_command(module, commands))
def load_config(module, config, commit=False, replace=False):
conn = get_connection(module)
return conn.load_config(config, commit, replace)