add nxos_switchport

network/nxos/nxos_switchport.py

@@ -0,0 +1,630 @@
+#!/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_switchport
+version_added: "2.1"
+short_description: Manages Layer 2 switchport interfaces
+extends_documentation_fragment: nxos
+description:
+    - Manages Layer 2 interfaces
+author: Jason Edelman (@jedelman8)
+notes:
+    - When state=absent, vlans can be added/removed from trunk links and
+      the existing access vlan can be 'unconfigured' to just having VLAN 1
+      on that interface
+    - When working with trunks VLANs the keywords add/remove are always sent
+      in the `switchport trunk allowed vlan` command. Use verbose mode to see
+      commands sent.
+    - When state=unconfigured, the interface will result with having a default
+      Layer 2 interface, i.e. vlan 1 in access mode
+options:
+    interface:
+        description:
+            - Full name of the interface, i.e. Ethernet1/1
+        required: true
+        default: null
+    mode:
+        description:
+            - Mode for the Layer 2 port
+        required: null
+        default: null
+        choices: ['access','trunk']
+    access_vlan:
+        description:
+            - if mode=access, used as the access vlan id
+        required: false
+        default: null
+    native_vlan:
+        description:
+            - if mode=trunk, used as the trunk native vlan id
+        required: false
+        default: null
+    trunk_vlans:
+        description:
+            - if mode=trunk, used as the vlan range to ADD or REMOVE
+              from the trunk
+        required: false
+        default: null
+    state:
+        description:
+            - Manage the state of the resource.
+        required: null
+        default:  present
+        choices: ['present','absent', 'unconfigured']
+
+'''
+EXAMPLES = '''
+# ENSURE Eth1/5 is in its default switchport state
+ - nxos_switchport: interface=eth1/5 state=unconfigured host={{ inventory_hostname }}
+
+# ENSURE Eth1/5 is configured for access vlan 20
+- nxos_switchport: interface=eth1/5 mode=access access_vlan=20 host={{ inventory_hostname }}
+
+# Ensure eth1/5 is a trunk port and ensure 2-50 are being tagged (doesn't mean others aren't also being tagged)
+- nxos_switchport: interface=eth1/5 mode=trunk native_vlan=10 trunk_vlans=2-50 host={{ inventory_hostname }}
+
+# Ensure these VLANs are not being tagged on the trunk
+- nxos_switchport: interface=eth1/5 mode=trunk trunk_vlans=51-4094 host={{ inventory_hostname }} state=absent
+
+'''
+
+RETURN = '''
+
+proposed:
+    description: k/v pairs of parameters passed into module
+    returned: always
+    type: dict
+    sample: {"access_vlan": "10", "interface": "eth1/5", "mode": "access"}
+existing:
+    description: k/v pairs of existing switchport
+    type: dict
+    sample:  {"access_vlan": "10", "access_vlan_name": "VLAN0010",
+              "interface": "Ethernet1/5", "mode": "access",
+              "native_vlan": "1", "native_vlan_name": "default",
+              "switchport": "Enabled", "trunk_vlans": "1-4094"}
+end_state:
+    description: k/v pairs of switchport after module execution
+    returned: always
+    type: dict or null
+    sample:  {"access_vlan": "10", "access_vlan_name": "VLAN0010",
+              "interface": "Ethernet1/5", "mode": "access",
+              "native_vlan": "1", "native_vlan_name": "default",
+              "switchport": "Enabled", "trunk_vlans": "1-4094"}
+state:
+    description: state as sent in from the playbook
+    returned: always
+    type: string
+    sample: "present"
+commands:
+    description: command string sent to the device
+    returned: always
+    type: string
+    sample: "interface eth1/5 ; switchport access vlan 20 ;"
+changed:
+    description: check to see if a change was made on the device
+    returned: always
+    type: boolean
+    sample: true
+
+'''
+
+
+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_interface_mode(interface, module):
+    """Gets current mode of interface: layer2 or layer3
+
+    Args:
+        device (Device): This is the device object of an NX-API enabled device
+            using the Device class within device.py
+        interface (string): full name of interface, i.e. Ethernet1/1,
+            loopback10, port-channel20, vlan20
+
+    Returns:
+        str: 'layer2' or 'layer3'
+
+    """
+    command = 'show interface ' + interface
+    intf_type = get_interface_type(interface)
+    body = execute_show_command(command, module)
+    mode = 'unknown'
+    interface_table = {}
+
+    try:
+        interface_table = body[0]['TABLE_interface']['ROW_interface']
+    except (KeyError, AttributeError, IndexError):
+        return mode
+
+    if interface_table:
+        # HACK FOR NOW
+        if intf_type in ['ethernet', 'portchannel']:
+            mode = str(interface_table.get('eth_mode', 'layer3'))
+            if mode in ['access', 'trunk']:
+                mode = 'layer2'
+            if mode == 'routed':
+                mode = 'layer3'
+        elif intf_type == 'loopback' or intf_type == 'svi':
+            mode = 'layer3'
+    return mode
+
+
+def interface_is_portchannel(interface, module):
+    """Checks to see if an interface is part of portchannel bundle
+
+    Args:
+        interface (str): full name of interface, i.e. Ethernet1/1
+
+    Returns:
+        True/False based on if interface is a member of a portchannel bundle
+
+    """
+    intf_type = get_interface_type(interface)
+    if intf_type == 'ethernet':
+        command = 'show interface ' + interface
+        body = execute_show_command(command, module)[0]
+        try:
+            interface_table = body[0]['TABLE_interface']['ROW_interface']
+        except (KeyError, AttributeError, IndexError):
+            interface_table = None
+
+        if interface_table:
+            state = interface_table.get('eth_bundle')
+            if state:
+                return True
+            else:
+                return False
+
+    return False
+
+
+def get_switchport(port, module):
+    """Gets current config of L2 switchport
+
+    Args:
+        device (Device): This is the device object of an NX-API enabled device
+            using the Device class within device.py
+        port (str): full name of interface, i.e. Ethernet1/1
+
+    Returns:
+        dictionary with k/v pairs for L2 vlan config
+
+    """
+
+    command = 'show interface {0} switchport'.format(port)
+
+    body = execute_show_command(command, module)
+
+    try:
+        body = execute_show_command(command, module)[0]
+    except IndexError:
+        body = []
+
+    if body:
+        key_map = {
+            "interface": "interface",
+            "oper_mode": "mode",
+            "switchport": "switchport",
+            "access_vlan": "access_vlan",
+            "access_vlan_name": "access_vlan_name",
+            "native_vlan": "native_vlan",
+            "native_vlan_name": "native_vlan_name",
+            "trunk_vlans": "trunk_vlans"
+        }
+
+        sp_table = body['TABLE_interface']['ROW_interface']
+
+        sp = apply_key_map(key_map, sp_table)
+
+        return sp
+    else:
+        return {}
+
+
+def remove_switchport_config_commands(interface, existing, proposed):
+    mode = proposed.get('mode')
+    commands = []
+    command = None
+    if mode == 'access':
+        av_check = existing.get('access_vlan') == proposed.get('access_vlan')
+        if av_check:
+            command = 'no switchport access vlan {0}'.format(
+                existing.get('access_vlan'))
+            commands.append(command)
+    elif mode == 'trunk':
+        tv_check = existing.get('trunk_vlans_list') == proposed.get('trunk_vlans_list')
+        if not tv_check:
+            vlans_to_remove = False
+            for vlan in proposed.get('trunk_vlans_list'):
+                if vlan in existing.get('trunk_vlans_list'):
+                    vlans_to_remove = True
+                    break
+            if vlans_to_remove:
+                command = 'switchport trunk allowed vlan remove {0}'.format(
+                    proposed.get('trunk_vlans'))
+                commands.append(command)
+        native_check = existing.get(
+            'native_vlan') == proposed.get('native_vlan')
+        if native_check and proposed.get('native_vlan'):
+            command = 'no switchport trunk native vlan {0}'.format(
+                existing.get('native_vlan'))
+            commands.append(command)
+    if commands:
+        commands.insert(0, 'interface ' + interface)
+    return commands
+
+
+def get_switchport_config_commands(interface, existing, proposed):
+    """Gets commands required to config a given switchport interface
+    """
+
+    proposed_mode = proposed.get('mode')
+    existing_mode = existing.get('mode')
+
+    commands = []
+    command = None
+    if proposed_mode != existing_mode:
+        if proposed_mode == 'trunk':
+            command = 'switchport mode trunk'
+        elif proposed_mode == 'access':
+            command = 'switchport mode access'
+    if command:
+        commands.append(command)
+
+    if proposed_mode == 'access':
+        av_check = existing.get('access_vlan') == proposed.get('access_vlan')
+        if not av_check:
+            command = 'switchport access vlan {0}'.format(
+                proposed.get('access_vlan'))
+            commands.append(command)
+    elif proposed_mode == 'trunk':
+        tv_check = existing.get('trunk_vlans_list') == proposed.get('trunk_vlans_list')
+        if not tv_check:
+            vlans_to_add = False
+            for vlan in proposed.get('trunk_vlans_list'):
+                if vlan not in existing.get('trunk_vlans_list'):
+                    vlans_to_add = True
+                    break
+            if vlans_to_add:
+                command = 'switchport trunk allowed vlan add {0}'.format(proposed.get('trunk_vlans'))
+                commands.append(command)
+
+        native_check = existing.get(
+            'native_vlan') == proposed.get('native_vlan')
+        if not native_check and proposed.get('native_vlan'):
+            command = 'switchport trunk native vlan {0}'.format(
+                proposed.get('native_vlan'))
+            commands.append(command)
+    if commands:
+        commands.insert(0, 'interface ' + interface)
+    return commands
+
+
+def is_switchport_default(existing):
+    """Determines if switchport has a default config based on mode
+
+    Args:
+        existing (dict): existing switcport configuration from Ansible mod
+
+    Returns:
+        boolean: True if switchport has OOB Layer 2 config, i.e.
+           vlan 1 and trunk all and mode is access
+
+    """
+
+    c1 = existing['access_vlan'] == '1'
+    c2 = existing['native_vlan'] == '1'
+    c3 = existing['trunk_vlans'] == '1-4094'
+    c4 = existing['mode'] == 'access'
+
+    default = c1 and c2 and c3 and c4
+
+    return default
+
+
+def default_switchport_config(interface):
+    commands = []
+    commands.append('interface ' + interface)
+    commands.append('switchport mode access')
+    commands.append('switch access vlan 1')
+    commands.append('switchport trunk native vlan 1')
+    commands.append('switchport trunk allowed vlan all')
+    return commands
+
+
+def vlan_range_to_list(vlans):
+    result = []
+    if vlans:
+        for part in vlans.split(','):
+            if part == 'none':
+                break
+            if '-' in part:
+                a, b = part.split('-')
+                a, b = int(a), int(b)
+                result.extend(range(a, b + 1))
+            else:
+                a = int(part)
+                result.append(a)
+        return numerical_sort(result)
+    return result
+
+
+def get_list_of_vlans(module):
+
+    command = 'show vlan'
+    body = execute_show_command(command, module)
+    vlan_list = []
+    vlan_table = body[0].get('TABLE_vlanbrief')['ROW_vlanbrief']
+
+    if isinstance(vlan_table, list):
+        for vlan in vlan_table:
+            vlan_list.append(str(vlan['vlanshowbr-vlanid-utf']))
+    else:
+        vlan_list.append('1')
+
+    return vlan_list
+
+
+def numerical_sort(string_int_list):
+    """Sorts list of strings/integers that are digits in numerical order.
+    """
+
+    as_int_list = []
+    as_str_list = []
+    for vlan in string_int_list:
+        as_int_list.append(int(vlan))
+    as_int_list.sort()
+    for vlan in as_int_list:
+        as_str_list.append(str(vlan))
+    return as_str_list
+
+
+def apply_key_map(key_map, table):
+    new_dict = {}
+    for key, value in table.items():
+        new_key = key_map.get(key)
+        if new_key:
+            new_dict[new_key] = str(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 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 = []
+    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:
+        response = module.execute(cmds, command_type=command_type) if command_type else 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 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, type='str'),
+        mode=dict(choices=['access', 'trunk'], required=False),
+        access_vlan=dict(type='str', required=False),
+        native_vlan=dict(type='str', required=False),
+        trunk_vlans=dict(type='str', required=False),
+        state=dict(choices=['absent', 'present', 'unconfigured'],
+                   default='present')
+    )
+    module = get_module(argument_spec=argument_spec,
+                        mutually_exclusive=[['access_vlan', 'trunk_vlans'],
+                                            ['access_vlan', 'native_vlan']],
+                        supports_check_mode=True)
+
+    interface = module.params['interface']
+    mode = module.params['mode']
+    access_vlan = module.params['access_vlan']
+    state = module.params['state']
+    trunk_vlans = module.params['trunk_vlans']
+    native_vlan = module.params['native_vlan']
+
+    args = dict(interface=interface, mode=mode, access_vlan=access_vlan,
+                native_vlan=native_vlan, trunk_vlans=trunk_vlans)
+
+    proposed = dict((k, v) for k, v in args.iteritems() if v is not None)
+
+    interface = interface.lower()
+
+    if mode == 'access' and state == 'present' and not access_vlan:
+        module.fail_json(msg='access_vlan param is required when '
+                         'mode=access && state=present')
+
+    if mode == 'trunk' and access_vlan:
+        module.fail_json(msg='access_vlan param not supported when '
+                         'using mode=trunk')
+
+    current_mode = get_interface_mode(interface, module)
+
+    # Current mode will return layer3, layer2, or unknown
+    if current_mode == 'unknown' or current_mode == 'layer3':
+        module.fail_json(msg='Ensure interface is configured to be a L2'
+                         '\nport first before using this module. You can use'
+                         '\nthe nxos_interface module for this.')
+
+    if interface_is_portchannel(interface, module):
+        module.fail_json(msg='Cannot change L2 config on physical '
+                         '\nport because it is in a portchannel. '
+                         '\nYou should update the portchannel config.')
+
+    # existing will never be null for Eth intfs as there is always a default
+    existing = get_switchport(interface, module)
+
+    # Safeguard check
+    # If there isn't an existing, something is wrong per previous comment
+    if not existing:
+        module.fail_json(msg='Make sure you are using the FULL interface name')
+
+    current_vlans = get_list_of_vlans(module)
+
+    if state == 'present':
+        if access_vlan and access_vlan not in current_vlans:
+            module.fail_json(msg='You are trying to configure a VLAN'
+                             ' on an interface that\ndoes not exist on the '
+                             ' switch yet!', vlan=access_vlan)
+        elif native_vlan and native_vlan not in current_vlans:
+            module.fail_json(msg='You are trying to configure a VLAN'
+                             ' on an interface that\ndoes not exist on the '
+                             ' switch yet!', vlan=native_vlan)
+
+    if trunk_vlans:
+        trunk_vlans_list = vlan_range_to_list(trunk_vlans)
+
+        existing_trunks_list = vlan_range_to_list(
+            (existing['trunk_vlans'])
+            )
+
+        existing['trunk_vlans_list'] = existing_trunks_list
+        proposed['trunk_vlans_list'] = trunk_vlans_list
+
+    changed = False
+
+    commands = []
+
+    if state == 'present':
+        command = get_switchport_config_commands(interface, existing, proposed)
+        commands.append(command)
+    elif state == 'unconfigured':
+        is_default = is_switchport_default(existing)
+        if not is_default:
+            command = default_switchport_config(interface)
+            commands.append(command)
+    elif state == 'absent':
+        command = remove_switchport_config_commands(interface,
+                                                    existing, proposed)
+        commands.append(command)
+
+    if trunk_vlans:
+        existing.pop('trunk_vlans_list')
+        proposed.pop('trunk_vlans_list')
+
+    end_state = existing
+
+    cmds = flatten_list(commands)
+
+    if cmds:
+        if module.check_mode:
+            module.exit_json(changed=True, commands=cmds)
+        else:
+            changed = True
+            execute_config_command(cmds, module)
+            end_state = get_switchport(interface, module)
+
+    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()