adds new module ios_system

lib/ansible/modules/network/ios/ios_system.py

@@ -0,0 +1,386 @@
+#!/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/>.
+#
+
+ANSIBLE_METADATA = {
+    'status': ['preview'],
+    'supported_by': 'core',
+    'version': '1.0'
+}
+
+DOCUMENTATION = """
+---
+module: ios_system
+version_added: "2.3"
+author: "Peter Sprygada (@privateip)"
+short_description: Manage the system attributes on Cisco IOS devices
+description:
+  - This module provides declarative management of node system attributes
+    on Cisco IOS devices.  It provides an option to configure host system
+    parameters or remove those parameters from the device active
+    configuration.
+options:
+  hostname:
+    description:
+      - The C(hostname) argument will configure the device hostname
+        parameter on Cisco IOS devices.  The C(hostname) value is an
+        ASCII string value.
+    required: false
+    default: null
+  domain_name:
+    description:
+      - The C(description) argument will configure the IP domain name
+        on the remote device to the provided value.  The C(domain_name)
+        argument should be in the dotted name form and will be
+        appended to the C(hostname) to create a fully-qualified
+        domain name
+    required: false
+    default: null
+  domain_search:
+    description:
+      - The C(domain_list) provides the list of domain suffixes to
+        append to the hostname for the purpose of doing name resolution.
+        This argument accepts a list of names and will be reconciled
+        with the current active configuration on the running node.
+    required: false
+    default: null
+  lookup_source:
+    description:
+      - The C(lookup_source) argument provides one or more source
+        interfaces to use for performing DNS lookups.  The interface
+        provided in C(lookup_source) must be a valid interface configured
+        on the device.
+    required: false
+    default: null
+  lookup_enabled:
+    description:
+      - The C(lookup_enabled) argument provides administrative control
+        for enabling or disabling DNS lookups.  When this argument is
+        set to True, lookups are performed and when it is set to False,
+        lookups are not performed.
+    required: false
+    default: null
+    choices: ['true', 'false']
+  name_servers:
+    description:
+      - The C(name_serves) argument accepts a list of DNS name servers by
+        way of either FQDN or IP address to use to perform name resolution
+        lookups.  This argument accepts wither a list of DNS servers See
+        examples.
+    required: false
+    default: null
+  state:
+    description:
+      - The C(state) argument configures the state of the configuration
+        values in the device's current active configuration.  When set
+        to I(present), the values should be configured in the device active
+        configuration and when set to I(absent) the values should not be
+        in the device active configuration
+    required: false
+    default: present
+    choices: ['present', 'absent']
+"""
+
+EXAMPLES = """
+- name: configure hostname and domain name
+  ios_system:
+    hostname: ios01
+    domain_name: eng.ansible.com
+    domain-search:
+      - ansible.com
+      - redhat.com
+      - cisco.com
+- name: remove configuration
+  ios_system:
+    state: absent
+- name: configure DNS lookup sources
+  ios_system:
+    lookup_source: MgmtEth0/0/CPU0/0
+    lookup_enabled: yes
+- name: configure name servers
+  ios_system:
+    name_servers:
+      - 8.8.8.8
+      - 8.8.4.4
+"""
+
+RETURN = """
+commands:
+  description: The list of configuration mode commands to send to the device
+  returned: always
+  type: list
+  sample:
+    - hostname ios01
+    - ip domain name eng.ansible.com
+start:
+  description: The time the job started
+  returned: always
+  type: str
+  sample: "2016-11-16 10:38:15.126146"
+end:
+  description: The time the job ended
+  returned: always
+  type: str
+  sample: "2016-11-16 10:38:25.595612"
+delta:
+  description: The time elapsed to perform all operations
+  returned: always
+  type: str
+  sample: "0:00:10.469466"
+"""
+import re
+
+from ansible.module_utils.local import LocalAnsibleModule
+from ansible.module_utils.ios import get_config, load_config
+from ansible.module_utils.network_common import ComplexList
+
+_CONFIGURED_VRFS = None
+
+def has_vrf(module, vrf):
+    global _CONFIGURED_VRFS
+    if _CONFIGURED_VRFS is not None:
+        return vrf in _CONFIGURED_VRFS
+    config = get_config(module)
+    _CONFIGURED_VRFS = re.findall('vrf definition (\S+)', config)
+    return vrf in _CONFIGURED_VRFS
+
+def requires_vrf(module, vrf):
+    if not has_vrf(module, vrf):
+        module.fail_json(msg='vrf %s is not configured' % vrf)
+
+def diff_list(want, have):
+    adds = [w for w in want if w not in have]
+    removes = [h for h in have if h not in want]
+    return (adds, removes)
+
+def map_obj_to_commands(want, have, module):
+    commands = list()
+    state = module.params['state']
+
+    needs_update = lambda x: want.get(x) and (want.get(x) != have.get(x))
+
+    if state == 'absent':
+        if have['hostname'] != 'Router':
+            commands.append('no hostname')
+
+        if have['lookup_source']:
+            commands.append('no ip domain lookup source-interface %s' % have['lookup_source'])
+
+        if have['lookup_enabled'] is False:
+            commands.append('ip domain lookup')
+
+        vrfs = set()
+        for item in have['domain_name']:
+            if item['vrf'] and item['vrf'] not in vrfs:
+                vrfs.add(item['vrf'])
+                commands.append('no ip domain name vrf %s' % item['vrf'])
+            elif None not in vrfs:
+                vrfs.add(None)
+                commands.append('no ip domain name')
+
+        vrfs = set()
+        for item in have['domain_search']:
+            if item['vrf'] and item['vrf'] not in vrfs:
+                vrfs.add(item['vrf'])
+                commands.append('no ip domain list vrf %s' % item['vrf'])
+            elif None not in vrfs:
+                vrfs.add(None)
+                commands.append('no ip domain list')
+
+        vrfs = set()
+        for item in have['name_servers']:
+            if item['vrf'] and item['vrf'] not in vrfs:
+                vrfs.add(item['vrf'])
+                commands.append('no ip name-server vrf %s' % item['vrf'])
+            elif None not in vrfs:
+                vrfs.add(None)
+                commands.append('no ip name-server')
+
+    elif state == 'present':
+        if needs_update('hostname'):
+            commands.append('hostname %s' % want['hostname'])
+
+        if needs_update('lookup_source'):
+            commands.append('ip domain lookup source-interface %s' % want['lookup_source'])
+
+        if needs_update('lookup_enabled'):
+            cmd = 'ip domain lookup'
+            if want['lookup_enabled'] is False:
+                cmd = 'no %s' % cmd
+            commands.append(cmd)
+
+        if want['domain_name']:
+            adds, removes = diff_list(want['domain_name'], have['domain_name'])
+            for item in removes:
+                if item['vrf']:
+                    commands.append('no ip domain name vrf %s %s' % (item['vrf'], item['name']))
+                else:
+                    commands.append('no ip domain name %s' % item['name'])
+            for item in adds:
+                if item['vrf']:
+                    requires_vrf(module, item['vrf'])
+                    commands.append('ip domain name vrf %s %s' % (item['vrf'], item['name']))
+                else:
+                    commands.append('ip domain name %s' % item['name'])
+
+        if want['domain_search']:
+            adds, removes = diff_list(want['domain_search'], have['domain_search'])
+            for item in removes:
+                if item['vrf']:
+                    commands.append('no ip domain list vrf %s %s' % (item['vrf'], item['name']))
+                else:
+                    commands.append('no ip domain list %s' % item['name'])
+            for item in adds:
+                if item['vrf']:
+                    requires_vrf(module, item['vrf'])
+                    commands.append('ip domain list vrf %s %s' % (item['vrf'], item['name']))
+                else:
+                    commands.append('ip domain list %s' % item['name'])
+
+
+        if want['name_servers']:
+            adds, removes = diff_list(want['name_servers'], have['name_servers'])
+            for item in removes:
+                if item['vrf']:
+                    commands.append('no ip name-server vrf %s %s' % (item['vrf'], item['server']))
+                else:
+                    commands.append('no ip name-server %s' % item['server'])
+            for item in adds:
+                if item['vrf']:
+                    requires_vrf(module, item['vrf'])
+                    commands.append('ip name-server vrf %s %s' % (item['vrf'], item['server']))
+                else:
+                    commands.append('ip name-server %s' % item['server'])
+
+    return commands
+
+def parse_hostname(config):
+    match = re.search('^hostname (\S+)', config, re.M)
+    return match.group(1)
+
+def parse_domain_name(config):
+    match = re.findall('^ip domain name (?:vrf (\S+) )*(\S+)', config, re.M)
+    matches = list()
+    for vrf, name in match:
+        if not vrf:
+            vrf = None
+        matches.append({'name': name, 'vrf': vrf})
+    return matches
+
+def parse_domain_search(config):
+    match = re.findall('^ip domain list (?:vrf (\S+) )*(\S+)', config, re.M)
+    matches = list()
+    for vrf, name in match:
+        if not vrf:
+            vrf = None
+        matches.append({'name': name, 'vrf': vrf})
+    return matches
+
+def parse_name_servers(config):
+    match = re.findall('^ip name-server (?:vrf (\S+) )*(\S+)', config, re.M)
+    matches = list()
+    for vrf, server in match:
+        if not vrf:
+            vrf = None
+        matches.append({'server': server, 'vrf': vrf})
+    return matches
+
+def parse_lookup_source(config):
+    match = re.search('ip domain lookup source-interface (\S+)', config, re.M)
+    if match:
+        return match.group(1)
+
+def map_config_to_obj(module):
+    config = get_config(module)
+    return {
+        'hostname': parse_hostname(config),
+        'domain_name': parse_domain_name(config),
+        'domain_search': parse_domain_search(config),
+        'lookup_source': parse_lookup_source(config),
+        'lookup_enabled': 'no ip domain lookup' not in config,
+        'name_servers': parse_name_servers(config)
+    }
+
+def map_params_to_obj(module):
+    obj = {
+        'hostname': module.params['hostname'],
+        'lookup_source': module.params['lookup_source'],
+        'lookup_enabled': module.params['lookup_enabled'],
+    }
+
+    domain_name = ComplexList(dict(
+        name=dict(key=True),
+        vrf=dict()
+    ))
+
+    domain_search = ComplexList(dict(
+        name=dict(key=True),
+        vrf=dict()
+    ))
+
+    name_servers = ComplexList(dict(
+        server=dict(key=True),
+        vrf=dict()
+    ))
+
+    for arg, cast in [('domain_name', domain_name),
+                      ('domain_search', domain_search),
+                      ('name_servers', name_servers)]:
+
+        if module.params[arg]:
+            obj[arg] = cast(module.params[arg])
+        else:
+            obj[arg] = None
+
+    return obj
+
+def main():
+    """ Main entry point for Ansible module execution
+    """
+    argument_spec = dict(
+        hostname=dict(),
+
+        domain_name=dict(type='list'),
+        domain_search=dict(type='list'),
+        name_servers=dict(type='list'),
+
+        lookup_source=dict(),
+        lookup_enabled=dict(type='bool'),
+
+        state=dict(choices=['present', 'absent'], default='present')
+    )
+
+    module = LocalAnsibleModule(argument_spec=argument_spec,
+                                supports_check_mode=True)
+
+    result = {'changed': False}
+
+    want = map_params_to_obj(module)
+    have = map_config_to_obj(module)
+
+    commands = map_obj_to_commands(want, have, module)
+    result['commands'] = commands
+
+    if commands:
+        if not module.check_mode:
+            load_config(module, commands)
+        result['changed'] = True
+
+    module.exit_json(**result)
+
+if __name__ == "__main__":
+    main()