Added python object for 2.1 and 2.2 support

lib/ansible/modules/network/nxos/nxos_feature.py

@@ -1,276 +1,676 @@
-#!/usr/bin/python
+# COMMON CODE FOR MIGRATION
-#
-# 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/>.
-#
 
-DOCUMENTATION = '''
+import re
----
+import time
-module: nxos_feature
+import collections
-version_added: "2.1"
+import itertools
-short_description: Manage features in NX-OS switches
+import shlex
-description:
-    - Offers ability to enable and disable features in NX-OS
-extends_documentation_fragment: nxos
-author:
-    - Jason Edelman (@jedelman8)
-    - Gabriele Gerbino (@GGabriele)
-options:
-    feature:
-        description:
-            - Name of feature.
-        required: true
-    state:
-        description:
-            - Desired state of the feature.
-        required: false
-        default: 'enabled'
-        choices: ['enabled','disabled']
-'''
 
-EXAMPLES = '''
+from ansible.module_utils.basic import AnsibleModule, env_fallback, get_exception
-# Ensure lacp is enabled
+from ansible.module_utils.basic import BOOLEANS_TRUE, BOOLEANS_FALSE
-- nxos_feature: feature=lacp state=enabled host={{ inventory_hostname }}
+from ansible.module_utils.shell import Shell, ShellError, HAS_PARAMIKO
-# Ensure ospf is disabled
+from ansible.module_utils.netcfg import parse
-- nxos_feature: feature=ospf state=disabled host={{ inventory_hostname }}
+from ansible.module_utils.urls import fetch_url
-# Ensure vpc is enabled
-- nxos_feature: feature=vpc state=enabled host={{ inventory_hostname }}
-'''
-
-RETURN = '''
-proposed:
-    description: proposed feature state
-    returned: always
-    type: dict
-    sample: {"state": "disabled"}
-existing:
-    description: existing state of feature
-    returned: always
-    type: dict
-    sample: {"state": "enabled"}
-end_state:
-    description: feature state after executing module
-    returned: always
-    type: dict
-    sample: {"state": "disabled"}
-state:
-    description: state as sent in from the playbook
-    returned: always
-    type: string
-    sample: "disabled"
-commands:
-    description: command string sent to the device
-    returned: always
-    type: string
-    sample: "no feature eigrp ;"
-changed:
-    description: check to see if a change was made on the device
-    returned: always
-    type: boolean
-    sample: true
-feature:
-    description: the feature that has been examined
-    returned: always
-    type: string
-    sample: "vpc"
-'''
 
 
-def execute_config_command(commands, module):
+DEFAULT_COMMENT_TOKENS = ['#', '!']
-    try:
+
-        module.configure(commands)
+class ConfigLine(object):
-    except ShellError:
+
-        clie = get_exception()
+    def __init__(self, text):
-        module.fail_json(msg='Error sending CLI commands',
+        self.text = text
-                         error=str(clie), commands=commands)
+        self.children = list()
+        self.parents = list()
+        self.raw = None
+
+    @property
+    def line(self):
+        line = ['set']
+        line.extend([p.text for p in self.parents])
+        line.append(self.text)
+        return ' '.join(line)
+
+    def __str__(self):
+        return self.raw
+
+    def __eq__(self, other):
+        if self.text == other.text:
+            return self.parents == other.parents
+
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
+def ignore_line(text, tokens=None):
+    for item in (tokens or DEFAULT_COMMENT_TOKENS):
+        if text.startswith(item):
+            return True
+
+def get_next(iterable):
+    item, next_item = itertools.tee(iterable, 2)
+    next_item = itertools.islice(next_item, 1, None)
+    return itertools.izip_longest(item, next_item)
+
+def parse(lines, indent, comment_tokens=None):
+    toplevel = re.compile(r'\S')
+    childline = re.compile(r'^\s*(.+)$')
+
+    ancestors = list()
+    config = list()
+
+    for line in str(lines).split('\n'):
+        text = str(re.sub(r'([{};])', '', line)).strip()
+
+        cfg = ConfigLine(text)
+        cfg.raw = line
+
+        if not text or ignore_line(text, comment_tokens):
+            continue
+
+        # handle top level commands
+        if toplevel.match(line):
+            ancestors = [cfg]
+
+        # handle sub level commands
+        else:
+            match = childline.match(line)
+            line_indent = match.start(1)
+            level = int(line_indent / indent)
+            parent_level = level - 1
+
+            cfg.parents = ancestors[:level]
+
+            if level > len(ancestors):
+                config.append(cfg)
+                continue
+
+            for i in range(level, len(ancestors)):
+                ancestors.pop()
+
+            ancestors.append(cfg)
+            ancestors[parent_level].children.append(cfg)
+
+        config.append(cfg)
+
+    return config
 
 
-def get_cli_body_ssh(command, response, module):
+class CustomNetworkConfig(object):
-    """Get response for when transport=cli.  This is kind of a hack and mainly
+
-    needed because these modules were originally written for NX-API.  And
+    def __init__(self, indent=None, contents=None, device_os=None):
-    not every command supports "| json" when using cli/ssh.  As such, we assume
+        self.indent = indent or 1
-    if | json returns an XML string, it is a valid command, but that the
+        self._config = list()
-    resource doesn't exist yet.
+        self._device_os = device_os
-    """
+
-    if 'xml' in response[0]:
+        if contents:
-        body = []
+            self.load(contents)
-    else:
+
+    @property
+    def items(self):
+        return self._config
+
+    @property
+    def lines(self):
+        lines = list()
+        for item, next_item in get_next(self.items):
+            if next_item is None:
+                lines.append(item.line)
+            elif not next_item.line.startswith(item.line):
+                lines.append(item.line)
+        return lines
+
+    def __str__(self):
+        text = ''
+        for item in self.items:
+            if not item.parents:
+                expand = self.get_section(item.text)
+                text += '%s\n' % self.get_section(item.text)
+        return str(text).strip()
+
+    def load(self, contents):
+        self._config = parse(contents, indent=self.indent)
+
+    def load_from_file(self, filename):
+        self.load(open(filename).read())
+
+    def get(self, path):
+        if isinstance(path, basestring):
+            path = [path]
+        for item in self._config:
+            if item.text == path[-1]:
+                parents = [p.text for p in item.parents]
+                if parents == path[:-1]:
+                    return item
+
+    def search(self, regexp, path=None):
+        regex = re.compile(r'^%s' % regexp, re.M)
+
+        if path:
+            parent = self.get(path)
+            if not parent or not parent.children:
+                return
+            children = [c.text for c in parent.children]
+            data = '\n'.join(children)
+        else:
+            data = str(self)
+
+        match = regex.search(data)
+        if match:
+            if match.groups():
+                values = match.groupdict().values()
+                groups = list(set(match.groups()).difference(values))
+                return (groups, match.groupdict())
+            else:
+                return match.group()
+
+    def findall(self, regexp):
+        regexp = r'%s' % regexp
+        return re.findall(regexp, str(self))
+
+    def expand(self, obj, items):
+        block = [item.raw for item in obj.parents]
+        block.append(obj.raw)
+
+        current_level = items
+        for b in block:
+            if b not in current_level:
+                current_level[b] = collections.OrderedDict()
+            current_level = current_level[b]
+        for c in obj.children:
+            if c.raw not in current_level:
+                current_level[c.raw] = collections.OrderedDict()
+
+    def to_lines(self, section):
+        lines = list()
+        for entry in section[1:]:
+            line = ['set']
+            line.extend([p.text for p in entry.parents])
+            line.append(entry.text)
+            lines.append(' '.join(line))
+        return lines
+
+    def to_block(self, section):
+        return '\n'.join([item.raw for item in section])
+
+    def get_section(self, path):
         try:
-            body = [json.loads(response[0])]
+            section = self.get_section_objects(path)
+            if self._device_os == 'junos':
+                return self.to_lines(section)
+            return self.to_block(section)
         except ValueError:
-            module.fail_json(msg='Command does not support JSON output',
+            return list()
-                             command=command)
-    return body
 
+    def get_section_objects(self, path):
+        if not isinstance(path, list):
+            path = [path]
+        obj = self.get_object(path)
+        if not obj:
+            raise ValueError('path does not exist in config')
+        return self.expand_section(obj)
 
-def execute_show(cmds, module, command_type=None):
+    def expand_section(self, configobj, S=None):
-    try:
+        if S is None:
-        if command_type:
+            S = list()
-            response = module.execute(cmds, command_type=command_type)
+        S.append(configobj)
-        else:
+        for child in configobj.children:
-            response = module.execute(cmds)
+            if child in S:
-    except ShellError:
+                continue
-        clie = get_exception()
+            self.expand_section(child, S)
-        module.fail_json(msg='Error sending {0}'.format(cmds),
+        return S
-                         error=str(clie))
-    return response
 
+    def flatten(self, data, obj=None):
+        if obj is None:
+            obj = list()
+        for k, v in data.items():
+            obj.append(k)
+            self.flatten(v, obj)
+        return obj
 
-def execute_show_command(command, module, command_type='cli_show'):
+    def get_object(self, path):
-    if module.params['transport'] == 'cli':
+        for item in self.items:
-        command += ' | json'
+            if item.text == path[-1]:
-        cmds = [command]
+                parents = [p.text for p in item.parents]
-        response = execute_show(cmds, module)
+                if parents == path[:-1]:
-        body = get_cli_body_ssh(command, response, module)
+                    return item
-    elif module.params['transport'] == 'nxapi':
-        cmds = [command]
-        body = execute_show(cmds, module, command_type=command_type)
 
-    return body
+    def get_children(self, path):
+        obj = self.get_object(path)
+        if obj:
+            return obj.children
 
+    def difference(self, other, path=None, match='line', replace='line'):
+        updates = list()
 
-def apply_key_map(key_map, table):
+        config = self.items
-    new_dict = {}
+        if path:
-    for key, value in table.items():
+            config = self.get_children(path) or list()
-        new_key = key_map.get(key)
+
-        if new_key:
+        if match == 'line':
-            value = table.get(key)
+            for item in config:
-            if value:
+                if item not in other.items:
-                new_dict[new_key] = str(value)
+                    updates.append(item)
+
+        elif match == 'strict':
+            if path:
+                current = other.get_children(path) or list()
             else:
-                new_dict[new_key] = value
+                current = other.items
-    return new_dict
+
+            for index, item in enumerate(config):
+                try:
+                    if item != current[index]:
+                        updates.append(item)
+                except IndexError:
+                    updates.append(item)
+
+        elif match == 'exact':
+            if path:
+                current = other.get_children(path) or list()
+            else:
+                current = other.items
+
+            if len(current) != len(config):
+                updates.extend(config)
+            else:
+                for ours, theirs in itertools.izip(config, current):
+                    if ours != theirs:
+                        updates.extend(config)
+                        break
+
+        if self._device_os == 'junos':
+            return updates
+
+        diffs = collections.OrderedDict()
+        for update in updates:
+            if replace == 'block' and update.parents:
+                update = update.parents[-1]
+            self.expand(update, diffs)
+
+        return self.flatten(diffs)
+
+    def replace(self, replace, text=None, regex=None, parents=None,
+            add_if_missing=False, ignore_whitespace=False):
+        match = None
+
+        parents = parents or list()
+        if text is None and regex is None:
+            raise ValueError('missing required arguments')
+
+        if not regex:
+            regex = ['^%s$' % text]
+
+        patterns = [re.compile(r, re.I) for r in to_list(regex)]
+
+        for item in self.items:
+            for regexp in patterns:
+                if ignore_whitespace is True:
+                    string = item.text
+                else:
+                    string = item.raw
+                if regexp.search(item.text):
+                    if item.text != replace:
+                        if parents == [p.text for p in item.parents]:
+                            match = item
+                            break
+
+        if match:
+            match.text = replace
+            indent = len(match.raw) - len(match.raw.lstrip())
+            match.raw = replace.rjust(len(replace) + indent)
+
+        elif add_if_missing:
+            self.add(replace, parents=parents)
 
 
-def get_available_features(feature, module):
+    def add(self, lines, parents=None):
-    available_features = {}
+        """Adds one or lines of configuration
-    command = 'show feature'
+        """
-    body = execute_show_command(command, module)
 
-    try:
+        ancestors = list()
-        body = body[0]['TABLE_cfcFeatureCtrlTable']['ROW_cfcFeatureCtrlTable']
+        offset = 0
-    except (TypeError, IndexError):
+        obj = None
-        return available_features
 
-    for each_feature in body:
+        ## global config command
-        feature = each_feature['cfcFeatureCtrlName2']
+        if not parents:
-        state = each_feature['cfcFeatureCtrlOpStatus2']
+            for line in to_list(lines):
+                item = ConfigLine(line)
+                item.raw = line
+                if item not in self.items:
+                    self.items.append(item)
 
-        if 'enabled' in state:
-            state = 'enabled'
-
-        if feature not in available_features.keys():
-            available_features[feature] = state
         else:
-            if (available_features[feature] == 'disabled' and
+            for index, p in enumerate(parents):
-                    state == 'enabled'):
+                try:
-                available_features[feature] = state
+                    i = index + 1
+                    obj = self.get_section_objects(parents[:i])[0]
+                    ancestors.append(obj)
 
-    return available_features
+                except ValueError:
+                    # add parent to config
+                    offset = index * self.indent
+                    obj = ConfigLine(p)
+                    obj.raw = p.rjust(len(p) + offset)
+                    if ancestors:
+                        obj.parents = list(ancestors)
+                        ancestors[-1].children.append(obj)
+                    self.items.append(obj)
+                    ancestors.append(obj)
+
+            # add child objects
+            for line in to_list(lines):
+                # check if child already exists
+                for child in ancestors[-1].children:
+                    if child.text == line:
+                        break
+                else:
+                    offset = len(parents) * self.indent
+                    item = ConfigLine(line)
+                    item.raw = line.rjust(len(line) + offset)
+                    item.parents = ancestors
+                    ancestors[-1].children.append(item)
+                    self.items.append(item)
 
 
-def get_commands(proposed, existing, state, module):
+def argument_spec():
-    feature = validate_feature(module, mode='config')
+    return dict(
-
+        # config options
-    commands = []
+        running_config=dict(aliases=['config']),
-    feature_check = proposed == existing
+        save_config=dict(type='bool', default=False, aliases=['save'])
-    if not feature_check:
-        if state == 'enabled':
-            command = 'feature {0}'.format(feature)
-            commands.append(command)
-        elif state == 'disabled':
-            command = "no feature {0}".format(feature)
-            commands.append(command)
-    return commands
-
-
-def validate_feature(module, mode='show'):
-    '''Some features may need to be mapped due to inconsistency
-    between how they appear from "show feature" output and
-    how they are configured'''
-
-    feature = module.params['feature']
-
-    feature_to_be_mapped = {
-        'show': {
-                'nv overlay': 'nve'},
-        'config':
-                {
-                'nve': 'nv overlay'}
-        }
-
-    if feature in feature_to_be_mapped[mode]:
-        feature = feature_to_be_mapped[mode][feature]
-
-    return feature
-
-
-def main():
-    argument_spec = dict(
-            feature=dict(type='str', required=True),
-            state=dict(choices=['enabled', 'disabled'], default='enabled',
-                       required=False),
     )
-    module = get_module(argument_spec=argument_spec,
+nxos_argument_spec = argument_spec()
-                        supports_check_mode=True)
 
-    feature = validate_feature(module)
-    state = module.params['state'].lower()
 
-    available_features = get_available_features(feature, module)
+NET_PASSWD_RE = re.compile(r"[\r\n]?password: $", re.I)
-    if feature not in available_features.keys():
+
-        module.fail_json(
+NET_COMMON_ARGS = dict(
-            msg='Invalid feature name.',
+    host=dict(required=True),
-            features_currently_supported=available_features,
+    port=dict(type='int'),
-            invalid_feature=feature)
+    username=dict(fallback=(env_fallback, ['ANSIBLE_NET_USERNAME'])),
+    password=dict(no_log=True, fallback=(env_fallback, ['ANSIBLE_NET_PASSWORD'])),
+    ssh_keyfile=dict(fallback=(env_fallback, ['ANSIBLE_NET_SSH_KEYFILE']), type='path'),
+    transport=dict(default='cli', choices=['cli', 'nxapi']),
+    use_ssl=dict(default=False, type='bool'),
+    validate_certs=dict(default=True, type='bool'),
+    provider=dict(type='dict'),
+    timeout=dict(default=10, type='int')
+)
+
+NXAPI_COMMAND_TYPES = ['cli_show', 'cli_show_ascii', 'cli_conf', 'bash']
+
+NXAPI_ENCODINGS = ['json', 'xml']
+
+CLI_PROMPTS_RE = [
+    re.compile(r'[\r\n]?[a-zA-Z]{1}[a-zA-Z0-9-]*[>|#|%](?:\s*)$'),
+    re.compile(r'[\r\n]?[a-zA-Z]{1}[a-zA-Z0-9-]*\(.+\)#(?:\s*)$')
+]
+
+CLI_ERRORS_RE = [
+    re.compile(r"% ?Error"),
+    re.compile(r"^% \w+", re.M),
+    re.compile(r"% ?Bad secret"),
+    re.compile(r"invalid input", re.I),
+    re.compile(r"(?:incomplete|ambiguous) command", re.I),
+    re.compile(r"connection timed out", re.I),
+    re.compile(r"[^\r\n]+ not found", re.I),
+    re.compile(r"'[^']' +returned error code: ?\d+"),
+    re.compile(r"syntax error"),
+    re.compile(r"unknown command")
+]
+
+
+def to_list(val):
+    if isinstance(val, (list, tuple)):
+        return list(val)
+    elif val is not None:
+        return [val]
     else:
-        existstate = available_features[feature]
+        return list()
 
-        existing = dict(state=existstate)
-        proposed = dict(state=state)
-        changed = False
-        end_state = existing
 
-        cmds = get_commands(proposed, existing, state, module)
+class Nxapi(object):
 
-        if cmds:
+    def __init__(self, module):
-            if module.check_mode:
+        self.module = module
-                module.exit_json(changed=True, commands=cmds)
+
+        # sets the module_utils/urls.py req parameters
+        self.module.params['url_username'] = module.params['username']
+        self.module.params['url_password'] = module.params['password']
+
+        self.url = None
+        self._nxapi_auth = None
+
+    def _get_body(self, commands, command_type, encoding, version='1.0', chunk='0', sid=None):
+        """Encodes a NXAPI JSON request message
+        """
+        if isinstance(commands, (list, set, tuple)):
+            commands = ' ;'.join(commands)
+
+        if encoding not in NXAPI_ENCODINGS:
+            msg = 'invalid encoding, received %s, exceped one of %s' % \
+                    (encoding, ','.join(NXAPI_ENCODINGS))
+            self.module_fail_json(msg=msg)
+
+        msg = {
+            'version': version,
+            'type': command_type,
+            'chunk': chunk,
+            'sid': sid,
+            'input': commands,
+            'output_format': encoding
+        }
+        return dict(ins_api=msg)
+
+    def connect(self):
+        host = self.module.params['host']
+        port = self.module.params['port']
+
+        if self.module.params['use_ssl']:
+            proto = 'https'
+            if not port:
+                port = 443
+        else:
+            proto = 'http'
+            if not port:
+                port = 80
+
+        self.url = '%s://%s:%s/ins' % (proto, host, port)
+
+    def send(self, commands, command_type='cli_show_ascii', encoding='json'):
+        """Send commands to the device.
+        """
+        clist = to_list(commands)
+
+        if command_type not in NXAPI_COMMAND_TYPES:
+            msg = 'invalid command_type, received %s, exceped one of %s' % \
+                    (command_type, ','.join(NXAPI_COMMAND_TYPES))
+            self.module_fail_json(msg=msg)
+
+        data = self._get_body(clist, command_type, encoding)
+        data = self.module.jsonify(data)
+
+        headers = {'Content-Type': 'application/json'}
+        if self._nxapi_auth:
+            headers['Cookie'] = self._nxapi_auth
+
+        response, headers = fetch_url(self.module, self.url, data=data,
+                headers=headers, method='POST')
+
+        self._nxapi_auth = headers.get('set-cookie')
+
+        if headers['status'] != 200:
+            self.module.fail_json(**headers)
+
+        response = self.module.from_json(response.read())
+        result = list()
+
+        output = response['ins_api']['outputs']['output']
+        for item in to_list(output):
+            if item['code'] != '200':
+                self.module.fail_json(**item)
             else:
-                execute_config_command(cmds, module)
+                result.append(item['body'])
-                changed = True
-                updated_features = get_available_features(feature, module)
-                existstate = updated_features[feature]
-                end_state = dict(state=existstate)
 
-    results = {}
+        return result
-    results['proposed'] = proposed
-    results['existing'] = existing
-    results['end_state'] = end_state
-    results['state'] = state
-    results['updates'] = cmds
-    results['changed'] = changed
-    results['feature'] = module.params['feature']
-
-    module.exit_json(**results)
 
 
-from ansible.module_utils.basic import *
+class Cli(object):
-from ansible.module_utils.urls import *
+
-from ansible.module_utils.shell import *
+    def __init__(self, module):
-from ansible.module_utils.netcfg import *
+        self.module = module
-from ansible.module_utils.nxos import *
+        self.shell = None
-if __name__ == '__main__':
+
-    main()
+    def connect(self, **kwargs):
+        host = self.module.params['host']
+        port = self.module.params['port'] or 22
+
+        username = self.module.params['username']
+        password = self.module.params['password']
+        timeout = self.module.params['timeout']
+        key_filename = self.module.params['ssh_keyfile']
+
+        allow_agent = (key_filename is not None) or (key_filename is None and password is None)
+
+        try:
+            self.shell = Shell(kickstart=False, prompts_re=CLI_PROMPTS_RE,
+                    errors_re=CLI_ERRORS_RE)
+            self.shell.open(host, port=port, username=username,
+                    password=password, key_filename=key_filename,
+                    allow_agent=allow_agent, timeout=timeout)
+        except ShellError:
+            e = get_exception()
+            msg = 'failed to connect to %s:%s - %s' % (host, port, str(e))
+            self.module.fail_json(msg=msg)
+
+    def send(self, commands, encoding='text'):
+        try:
+            return self.shell.send(commands)
+        except ShellError:
+            e = get_exception()
+            self.module.fail_json(msg=e.message, commands=commands)
+
+
+class NetworkModule(AnsibleModule):
+
+    def __init__(self, *args, **kwargs):
+        super(NetworkModule, self).__init__(*args, **kwargs)
+        self.connection = None
+        self._config = None
+        self._connected = False
+
+    @property
+    def connected(self):
+        return self._connected
+
+    @property
+    def config(self):
+        if not self._config:
+            self._config = self.get_config()
+        return self._config
+
+    def _load_params(self):
+        super(NetworkModule, self)._load_params()
+        provider = self.params.get('provider') or dict()
+        for key, value in provider.items():
+            if key in NET_COMMON_ARGS:
+                if self.params.get(key) is None and value is not None:
+                    self.params[key] = value
+
+    def connect(self):
+        cls = globals().get(str(self.params['transport']).capitalize())
+        try:
+            self.connection = cls(self)
+        except TypeError:
+            e = get_exception()
+            self.fail_json(msg=e.message)
+
+        self.connection.connect()
+
+        if self.params['transport'] == 'cli':
+            self.connection.send('terminal length 0')
+
+        self._connected = True
+
+    def configure(self, commands):
+        commands = to_list(commands)
+        if self.params['transport'] == 'cli':
+            return self.configure_cli(commands)
+        else:
+            return self.execute(commands, command_type='cli_conf')
+
+    def configure_cli(self, commands):
+        commands = to_list(commands)
+        commands.insert(0, 'configure')
+        responses = self.execute(commands)
+        responses.pop(0)
+        return responses
+
+    def execute(self, commands, **kwargs):
+        if not self.connected:
+            self.connect()
+        return self.connection.send(commands, **kwargs)
+
+    def disconnect(self):
+        self.connection.close()
+        self._connected = False
+
+    def parse_config(self, cfg):
+        return parse(cfg, indent=2)
+
+    def get_config(self):
+        cmd = 'show running-config'
+        if self.params.get('include_defaults'):
+            cmd += ' all'
+        response = self.execute(cmd)
+        return response[0]
+
+
+def get_module(**kwargs):
+    """Return instance of NetworkModule
+    """
+    argument_spec = NET_COMMON_ARGS.copy()
+    if kwargs.get('argument_spec'):
+        argument_spec.update(kwargs['argument_spec'])
+    kwargs['argument_spec'] = argument_spec
+
+    module = NetworkModule(**kwargs)
+
+    if module.params['transport'] == 'cli' and not HAS_PARAMIKO:
+        module.fail_json(msg='paramiko is required but does not appear to be installed')
+
+    return module
+
+
+def custom_get_config(module, include_defaults=False):
+    config = module.params['running_config']
+    if not config:
+        cmd = 'show running-config'
+        if module.params['include_defaults']:
+            cmd += ' all'
+        if module.params['transport'] == 'nxapi':
+            config = module.execute([cmd], command_type='cli_show_ascii')[0]
+        else:
+            config = module.execute([cmd])[0]
+
+    return CustomNetworkConfig(indent=2, contents=config)
+
+def load_config(module, candidate):
+    config = custom_get_config(module)
+
+    commands = candidate.difference(config)
+    commands = [str(c).strip() for c in commands]
+
+    save_config = module.params['save_config']
+
+    result = dict(changed=False)
+
+    if commands:
+        if not module.check_mode:
+            module.configure(commands)
+            if save_config:
+                module.config.save_config()
+
+        result['changed'] = True
+        result['updates'] = commands
+
+    return result
+# END OF COMMON CODE