add nxos_interface

network/nxos/nxos_interface.py

@@ -0,0 +1,718 @@
+#!/usr/bin/python
+#
+# 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 = '''
+---
+
+module: nxos_interface
+version_added: "2.1"
+short_description: Manages physical attributes of interfaces
+description:
+    - Manages physical attributes of interfaces of NX-OS switches
+author: Jason Edelman (@jedelman8)
+notes:
+    - This module is also used to create logical interfaces such as
+      svis and loopbacks.
+    - Be cautious of platform specific idiosyncrasies. For example,
+      when you default a loopback interface, the admin state toggles
+      on certain versions of NX-OS.
+options:
+    interface:
+        description:
+            - Full name of interface, i.e. Ethernet1/1, port-channel10.
+        required: true
+        default: null
+    admin_state:
+        description:
+            - Administrative state of the interface
+        required: false
+        default: up
+        choices: ['up','down']
+    description:
+        description:
+            - Interface description
+        required: false
+        default: null
+    mode:
+        description:
+            - Manage Layer 2 or Layer 3 state of the interface
+        required: false
+        default: null
+        choices: ['layer2','layer3']
+    state:
+        description:
+            - Specify desired state of the resource
+        required: true
+        default: present
+        choices: ['present','absent','default']
+'''
+
+EXAMPLES = '''
+# Ensure an interface is a Layer 3 port and that it has the proper description
+- nxos_interface: interface=Ethernet1/1 description='Configured by Ansible' mode=layer3 host={{ inventory_hostname }}
+
+# Admin down an interface
+- nxos_interface: interface=Ethernet2/1 host={{ inventory_hostname }} admin_state=down
+
+# Remove all loopback interfaces
+- nxos_interface: interface=loopback state=absent host={{ inventory_hostname }}
+
+# Remove all logical interfaces
+- nxos_interface: interface={{ item }} state=absent host={{ inventory_hostname }}
+  with_items:
+    - loopback
+    - portchannel
+    - svi
+
+# Admin up all ethernet interfaces
+- nxos_interface: interface=ethernet host={{ inventory_hostname }} admin_state=up
+
+# Admin down ALL interfaces (physical and logical)
+- nxos_interface: interface=all host={{ inventory_hostname }} admin_state=down
+
+'''
+RETURN = '''
+
+proposed:
+    description: k/v pairs of parameters passed into module
+    returned: always
+    type: dict
+    sample: {"admin_state": "down"}
+existing:
+    description: k/v pairs of existing switchport
+    type: dict
+    sample:  {"admin_state": "up", "description": "None", "interface": "port-channel101", "mode": "layer2", "type": "portchannel"}
+end_state:
+    description: k/v pairs of switchport after module execution
+    returned: always
+    type: dict or null
+    sample:  {"admin_state": "down", "description": "None", "interface": "port-channel101", "mode": "layer2", "type": "portchannel"}
+state:
+    description: state as sent in from the playbook
+    returned: always
+    type: string
+    sample: "present"
+updates:
+    description: command list sent to the device
+    returned: always
+    type: list
+    sample: ["interface port-channel101", "shutdown"]
+changed:
+    description: check to see if a change was made on the device
+    returned: always
+    type: boolean
+    sample: true
+
+'''
+
+
+def is_default_interface(interface, module):
+    """Checks to see if interface exists and if it is a default config
+
+    Args:
+        interface (str): full name of interface, i.e. vlan10,
+            Ethernet1/1, loopback10
+
+    Returns:
+        True: if interface has default config
+        False: if it does not have a default config
+        DNE (str): if the interface does not exist - loopbacks, SVIs, etc.
+
+    """
+    command = 'show run interface ' + interface
+
+    try:
+        body = execute_show_command(command, module,
+                                    command_type='cli_show_ascii')[0]
+        # module.exit_json(abcd='asdasdfasdf', body=body, c=command)
+    except IndexError:
+        body = []
+
+    if body:
+        raw_list = body.split('\n')
+        found = False
+        for line in raw_list:
+            if line.startswith('interface'):
+                found = True
+            if found and line and not line.startswith('interface'):
+                return False
+        return True
+
+    else:
+        return 'DNE'
+
+
+def get_available_features(feature, module):
+    available_features = {}
+    command = 'show feature'
+    body = execute_show_command(command, module)
+
+    try:
+        body = body[0]['TABLE_cfcFeatureCtrlTable']['ROW_cfcFeatureCtrlTable']
+    except (TypeError, IndexError):
+        return available_features
+
+    for each_feature in body:
+        feature = each_feature['cfcFeatureCtrlName2']
+        state = each_feature['cfcFeatureCtrlOpStatus2']
+
+        if 'enabled' in state:
+            state = 'enabled'
+
+        if feature not in available_features.keys():
+            available_features[feature] = state
+        else:
+            if (available_features[feature] == 'disabled' and
+                    state == 'enabled'):
+                available_features[feature] = state
+
+    return available_features
+
+
+def get_interface_type(interface):
+    """Gets the type of interface
+
+    Args:
+        interface (str): full name of interface, i.e. Ethernet1/1, loopback10,
+            port-channel20, vlan20
+
+    Returns:
+        type of interface: ethernet, svi, loopback, management, portchannel,
+         or unknown
+
+    """
+    if interface.upper().startswith('ET'):
+        return 'ethernet'
+    elif interface.upper().startswith('VL'):
+        return 'svi'
+    elif interface.upper().startswith('LO'):
+        return 'loopback'
+    elif interface.upper().startswith('MG'):
+        return 'management'
+    elif interface.upper().startswith('MA'):
+        return 'management'
+    elif interface.upper().startswith('PO'):
+        return 'portchannel'
+    else:
+        return 'unknown'
+
+
+def get_manual_interface_attributes(interface, module):
+    """Gets admin state and description of a SVI interface. Hack due to API.
+
+    Args:
+        interface (str): full name of SVI interface, i.e. vlan10
+
+    Returns:
+        dictionary that has two k/v pairs: admin_state & description
+            if not an svi, returns None
+
+    """
+
+    if get_interface_type(interface) == 'svi':
+        command = 'show interface ' + interface
+        try:
+            body = execute_modified_show_for_cli_text(command, module)[0]
+        except (IndexError, ShellError):
+            return None
+
+        command_list = body.split('\n')
+        desc = None
+        admin_state = 'up'
+        for each in command_list:
+            if 'Description:' in each:
+                line = each.split('Description:')
+                desc = line[1].strip().split('MTU')[0].strip()
+            elif 'Administratively down' in each:
+                admin_state = 'down'
+
+        return dict(description=desc, admin_state=admin_state)
+    else:
+        return None
+
+
+def get_interface(intf, module):
+    """Gets current config/state of interface
+
+    Args:
+        intf (string): full name of interface, i.e. Ethernet1/1, loopback10,
+            port-channel20, vlan20
+
+    Returns:
+      dictionary that has relevant config/state data about the given
+          interface based on the type of interface it is
+
+    """
+    base_key_map = {
+        'interface': 'interface',
+        'admin_state': 'admin_state',
+        'desc': 'description',
+    }
+    mode_map = {
+        'eth_mode': 'mode'
+    }
+    loop_map = {
+        'state': 'admin_state'
+    }
+    svi_map = {
+        'svi_admin_state': 'admin_state',
+        'desc': 'description'
+    }
+    mode_value_map = {
+        "mode": {
+            "access": "layer2",
+            "trunk": "layer2",
+            "routed": "layer3",
+            "layer3": "layer3"
+        }
+    }
+
+    key_map = {}
+    interface = {}
+
+    command = 'show interface ' + intf
+    try:
+        body = execute_show_command(command, module)[0]
+    except IndexError:
+        body = []
+
+    if body:
+        interface_table = body['TABLE_interface']['ROW_interface']
+
+        intf_type = get_interface_type(intf)
+        if intf_type in ['portchannel', 'ethernet']:
+            if not interface_table.get('eth_mode'):
+                interface_table['eth_mode'] = 'layer3'
+
+        if intf_type == 'ethernet':
+            key_map.update(base_key_map)
+            key_map.update(mode_map)
+            temp_dict = apply_key_map(key_map, interface_table)
+            temp_dict = apply_value_map(mode_value_map, temp_dict)
+            interface.update(temp_dict)
+
+        elif intf_type == 'svi':
+            key_map.update(svi_map)
+            temp_dict = apply_key_map(key_map, interface_table)
+            interface.update(temp_dict)
+            attributes = get_manual_interface_attributes(intf, module)
+            interface['admin_state'] = str(attributes.get('admin_state',
+                                                          'nxapibug'))
+            interface['description'] = str(attributes.get('description',
+                                                          'nxapi_bug'))
+        elif intf_type == 'loopback':
+            key_map.update(base_key_map)
+            key_map.pop('admin_state')
+            key_map.update(loop_map)
+            temp_dict = apply_key_map(key_map, interface_table)
+            if not temp_dict.get('description'):
+                temp_dict['description'] = "None"
+            interface.update(temp_dict)
+
+        elif intf_type == 'management':
+            key_map.update(base_key_map)
+            temp_dict = apply_key_map(key_map, interface_table)
+            interface.update(temp_dict)
+
+        elif intf_type == 'portchannel':
+            key_map.update(base_key_map)
+            key_map.update(mode_map)
+            temp_dict = apply_key_map(key_map, interface_table)
+            temp_dict = apply_value_map(mode_value_map, temp_dict)
+            if not temp_dict.get('description'):
+                temp_dict['description'] = "None"
+            interface.update(temp_dict)
+
+    interface['type'] = intf_type
+
+    return interface
+
+
+def get_intf_args(interface):
+    intf_type = get_interface_type(interface)
+
+    arguments = ['admin_state', 'description']
+
+    if intf_type in ['ethernet', 'portchannel']:
+        arguments.extend(['mode'])
+
+    return arguments
+
+
+def get_interfaces_dict(module):
+    """Gets all active interfaces on a given switch
+
+    Returns:
+        dictionary with interface type (ethernet,svi,loop,portchannel) as the
+            keys.  Each value is a list of interfaces of given interface (key)
+            type.
+
+    """
+    command = 'show interface status'
+    try:
+        body = execute_show_command(command, module)[0]
+    except IndexError:
+        body = {}
+
+    interfaces = {
+        'ethernet': [],
+        'svi': [],
+        'loopback': [],
+        'management': [],
+        'portchannel': [],
+        'unknown': []
+        }
+
+    interface_list = body.get('TABLE_interface')['ROW_interface']
+    for i in interface_list:
+        intf = i['interface']
+        intf_type = get_interface_type(intf)
+
+        interfaces[intf_type].append(intf)
+
+    return interfaces
+
+
+def normalize_interface(if_name):
+    """Return the normalized interface name
+    """
+    def _get_number(if_name):
+        digits = ''
+        for char in if_name:
+            if char.isdigit() or char == '/':
+                digits += char
+        return digits
+
+    if if_name.lower().startswith('et'):
+        if_type = 'Ethernet'
+    elif if_name.lower().startswith('vl'):
+        if_type = 'Vlan'
+    elif if_name.lower().startswith('lo'):
+        if_type = 'loopback'
+    elif if_name.lower().startswith('po'):
+        if_type = 'port-channel'
+    else:
+        if_type = None
+
+    number_list = if_name.split(' ')
+    if len(number_list) == 2:
+        number = number_list[-1].strip()
+    else:
+        number = _get_number(if_name)
+
+    if if_type:
+        proper_interface = if_type + number
+    else:
+        proper_interface = if_name
+
+    return proper_interface
+
+
+def apply_key_map(key_map, table):
+    new_dict = {}
+    for key, value in table.items():
+        new_key = key_map.get(key)
+        if new_key:
+            value = table.get(key)
+            if value:
+                new_dict[new_key] = str(value)
+            else:
+                new_dict[new_key] = value
+    return new_dict
+
+
+def apply_value_map(value_map, resource):
+    for key, value in value_map.items():
+        resource[key] = value[resource.get(key)]
+    return resource
+
+
+def get_interface_config_commands(interface, intf, existing):
+    """Generates list of commands to configure on device
+
+    Args:
+        interface (str): k/v pairs in the form of a set that should
+            be configured on the device
+        intf (str): full name of interface, i.e. Ethernet1/1
+
+    Returns:
+      list: ordered list of commands to be sent to device
+
+    """
+
+    commands = []
+
+    desc = interface.get('description')
+    if desc:
+        commands.append('description {0}'.format(desc))
+
+    mode = interface.get('mode')
+    if mode:
+        if mode == 'layer2':
+            command = 'switchport'
+        elif mode == 'layer3':
+            command = 'no switchport'
+        commands.append(command)
+
+    admin_state = interface.get('admin_state')
+    if admin_state:
+        command = get_admin_state(interface, intf, admin_state)
+        commands.append(command)
+
+    if commands:
+        commands.insert(0, 'interface ' + intf)
+
+    return commands
+
+
+def get_admin_state(interface, intf, admin_state):
+    if admin_state == 'up':
+        command = 'no shutdown'
+    elif admin_state == 'down':
+        command = 'shutdown'
+    return command
+
+
+def get_proposed(existing, normalized_interface, args):
+
+    # gets proper params that are allowed based on interface type
+    allowed_params = get_intf_args(normalized_interface)
+
+    proposed = {}
+
+    # retrieves proper interface params from args (user defined params)
+    for param in allowed_params:
+        temp = args.get(param)
+        if temp:
+            proposed[param] = temp
+
+    return proposed
+
+
+def smart_existing(module, intf_type, normalized_interface):
+
+    # 7K BUG MAY CAUSE THIS TO FAIL
+
+    all_interfaces = get_interfaces_dict(module)
+    if normalized_interface in all_interfaces[intf_type]:
+        existing = get_interface(normalized_interface, module)
+        is_default = is_default_interface(normalized_interface, module)
+    else:
+        if intf_type == 'ethernet':
+            module.fail_json(msg='Invalid Ethernet interface provided.',
+                             interface=normalized_interface)
+        elif intf_type in ['loopback', 'portchannel', 'svi']:
+            existing = {}
+            is_default = 'DNE'
+    return existing, is_default
+
+
+def execute_config_command(commands, module):
+    try:
+        module.configure(commands)
+    except ShellError, clie:
+        module.fail_json(msg='Error sending CLI commands',
+                         error=str(clie), commands=commands)
+
+
+def get_cli_body_ssh(command, response, module):
+    """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
+    not every command supports "| json" when using cli/ssh.  As such, we assume
+    if | json returns an XML string, it is a valid command, but that the
+    resource doesn't exist yet.
+    """
+    if 'xml' in response[0]:
+        body = []
+    elif 'show run' in command:
+        body = response
+    else:
+        try:
+            body = [json.loads(response[0])]
+        except ValueError:
+            module.fail_json(msg='Command does not support JSON output',
+                             command=command)
+    return body
+
+
+def execute_show(cmds, module, command_type=None):
+    try:
+        if command_type:
+            response = module.execute(cmds, command_type=command_type)
+        else:
+            response = module.execute(cmds)
+    except ShellError, clie:
+        module.fail_json(msg='Error sending {0}'.format(command),
+                         error=str(clie))
+    return response
+
+
+def execute_show_command(command, module, command_type='cli_show'):
+
+    if module.params['transport'] == 'cli':
+        command += ' | json'
+        cmds = [command]
+        response = execute_show(cmds, module)
+        body = get_cli_body_ssh(command, response, module)
+    elif module.params['transport'] == 'nxapi':
+        cmds = [command]
+        body = execute_show(cmds, module, command_type=command_type)
+
+    return body
+
+
+def execute_modified_show_for_cli_text(command, module):
+    cmds = [command]
+    response = execute_show(cmds, module)
+    body = response
+    return body
+
+
+def flatten_list(command_lists):
+    flat_command_list = []
+    for command in command_lists:
+        if isinstance(command, list):
+            flat_command_list.extend(command)
+        else:
+            flat_command_list.append(command)
+    return flat_command_list
+
+
+def main():
+
+    argument_spec = dict(
+        interface=dict(required=True,),
+        admin_state=dict(default='up', choices=['up', 'down'], required=False),
+        description=dict(required=False, default=None),
+        mode=dict(choices=['layer2', 'layer3'], required=False),
+        state=dict(choices=['absent', 'present', 'default'],
+                   default='present', required=False)
+    )
+    module = get_module(argument_spec=argument_spec,
+                        supports_check_mode=True)
+
+    interface = module.params['interface'].lower()
+    admin_state = module.params['admin_state']
+    description = module.params['description']
+    mode = module.params['mode']
+    state = module.params['state']
+
+    changed = False
+
+    args = dict(interface=interface, admin_state=admin_state,
+                description=description, mode=mode)
+
+    intf_type = get_interface_type(interface)
+
+    normalized_interface = normalize_interface(interface)
+
+    if normalized_interface == 'Vlan1' and state == 'absent':
+        module.fail_json(msg='ERROR: CANNOT REMOVE VLAN 1!')
+
+    if intf_type == 'svi':
+        feature = 'interface-vlan'
+        available_features = get_available_features(feature, module)
+        svi_state = available_features[feature]
+        if svi_state == 'disabled':
+            module.fail_json(
+                msg='SVI (interface-vlan) feature needs to be enabled first',
+            )
+
+    if intf_type == 'unknown':
+        module.fail_json(
+            msg='unknown interface type found-1',
+            interface=interface)
+
+    existing, is_default = smart_existing(module, intf_type, normalized_interface)
+    proposed = get_proposed(existing, normalized_interface, args)
+
+    delta = dict()
+    commands = []
+
+    if state == 'absent':
+        if intf_type in ['svi', 'loopback', 'portchannel']:
+            if is_default != 'DNE':
+                cmds = ['no interface {0}'.format(normalized_interface)]
+                commands.append(cmds)
+        elif intf_type in ['ethernet']:
+            if is_default is False:
+                cmds = ['default interface {0}'.format(normalized_interface)]
+                commands.append(cmds)
+    elif state == 'present':
+        if not existing:
+            cmds = get_interface_config_commands(proposed,
+                                                 normalized_interface,
+                                                 existing)
+            commands.append(cmds)
+        else:
+            delta = dict(set(proposed.iteritems()).difference(
+                existing.iteritems()))
+            if delta:
+                cmds = get_interface_config_commands(delta,
+                                                     normalized_interface,
+                                                     existing)
+                commands.append(cmds)
+    elif state == 'default':
+        if is_default is False:
+            cmds = ['default interface {0}'.format(normalized_interface)]
+            commands.append(cmds)
+        elif is_default == 'DNE':
+            module.exit_json(msg='interface you are trying to default does'
+                             ' not exist')
+
+    cmds = flatten_list(commands)
+
+    end_state = existing
+
+    if cmds:
+        if module.check_mode:
+            module.exit_json(changed=True, commands=cmds)
+        else:
+            execute_config_command(cmds, module)
+            if delta.get('mode'): # or delta.get('admin_state'):
+                # if the mode changes from L2 to L3, the admin state
+                # seems to change after the API call, so adding a second API
+                # call to ensure it's in the desired state.
+                admin_state = delta.get('admin_state') or admin_state
+                c1 = 'interface {0}'.format(normalized_interface)
+                c2 = get_admin_state(delta, normalized_interface, admin_state)
+                cmds2 = [c1, c2]
+                execute_config_command(cmds2, module)
+                cmds.extend(cmds2)
+            changed = True
+            end_state, is_default = smart_existing(module, intf_type,
+                                                   normalized_interface)
+
+    results = {}
+    results['proposed'] = proposed
+    results['existing'] = existing
+    results['end_state'] = end_state
+    results['state'] = state
+    results['updates'] = cmds
+    results['changed'] = changed
+
+    module.exit_json(**results)
+
+from ansible.module_utils.basic import *
+from ansible.module_utils.urls import *
+from ansible.module_utils.shell import *
+from ansible.module_utils.netcfg import *
+from ansible.module_utils.nxos import *
+
+if __name__ == '__main__':
+    main()