eos_linkagg DI module (ansible#33007)

* eos_linkagg DI module

Signed-off-by: Trishna Guha <[email protected]>

* integration test

Signed-off-by: Trishna Guha <[email protected]>

* pep8 fixes

* Push fix for Qalthos's comment

Signed-off-by: Trishna Guha <[email protected]>

lib/ansible/modules/network/eos/eos_linkagg.py

@@ -0,0 +1,343 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+# (c) 2017, Ansible by Red Hat, inc
+# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+
+from __future__ import absolute_import, division, print_function
+__metaclass__ = type
+
+
+ANSIBLE_METADATA = {'metadata_version': '1.1',
+                    'status': ['preview'],
+                    'supported_by': 'network'}
+
+DOCUMENTATION = """
+---
+module: eos_linkagg
+version_added: "2.5"
+author: "Trishna Guha (@trishnaguha)"
+short_description: Manage link aggregation groups on Arist EOS network devices
+description:
+  - This module provides declarative management of link aggregation groups
+    on Arista EOS network devices.
+notes:
+  - Tested against EOS 4.15
+options:
+  group:
+    description:
+      - Channel-group number for the port-channel
+        Link aggregation group. Range 1-2000.
+  mode:
+    description:
+      - Mode of the link aggregation group.
+    choices: ['active', 'on', 'passive']
+  members:
+    description:
+      - List of members of the link aggregation group.
+  min_links:
+    description:
+      - Minimum number of ports required up
+        before bringing up the link aggregation group.
+  aggregate:
+    description: List of link aggregation definitions.
+  state:
+    description:
+      - State of the link aggregation group.
+    default: present
+    choices: ['present', 'absent']
+"""
+
+EXAMPLES = """
+- name: create link aggregation group
+  eos_linkagg:
+    group: 10
+    state: present
+
+- name: delete link aggregation group
+  eos_linkagg:
+    group: 10
+    state: absent
+
+- name: set link aggregation group to members
+  eos_linkagg:
+    group: 200
+    min_links: 3
+    mode: active
+    members:
+      - Ethernet0
+      - Ethernet1
+
+- name: remove link aggregation group from Ethernet0
+  eos_linkagg:
+    group: 200
+    min_links: 3
+    mode: active
+    members:
+      - Ethernet1
+
+- name: Create aggregate of linkagg definitions
+  eos_linkagg:
+    aggregate:
+      - { group: 3, mode: on, members: [Ethernet1] }
+      - { group: 100, mode: passive, min_links: 3, members: [Ethernet2] }
+
+- name: Remove aggregate of linkagg definitions
+  eos_linkagg:
+    aggregate:
+      - { group: 3, mode: on, members: [Ethernet1] }
+      - { group: 100, mode: passive, min_links: 3, members: [Ethernet2] }
+    state: absent
+"""
+
+RETURN = """
+commands:
+  description: The list of configuration mode commands to send to the device
+  returned: always, except for the platforms that use Netconf transport to manage the device.
+  type: list
+  sample:
+    - interface port-channel 30
+    - port-channel min-links 5
+    - interface Ethernet3
+    - channel-group 30 mode on
+    - no interface port-channel 30
+"""
+
+import re
+from copy import deepcopy
+
+from ansible.module_utils.basic import AnsibleModule
+from ansible.module_utils.network.common.utils import remove_default_spec
+from ansible.module_utils.network.eos.eos import get_config, load_config
+from ansible.module_utils.network.eos.eos import eos_argument_spec
+
+
+def search_obj_in_list(group, lst):
+    for o in lst:
+        if o['group'] == group:
+            return o
+
+
+def map_obj_to_commands(updates, module):
+    commands = list()
+    want, have = updates
+    purge = module.params['purge']
+
+    for w in want:
+        group = w['group']
+        mode = w['mode']
+        min_links = w['min_links']
+        members = w.get('members') or []
+        state = w['state']
+        del w['state']
+
+        obj_in_have = search_obj_in_list(group, have)
+
+        if state == 'absent':
+            if obj_in_have:
+                commands.append('no interface port-channel {}'.format(group))
+
+        elif state == 'present':
+            cmd = ['interface port-channel {}'.format(group),
+                   'end']
+            if not obj_in_have:
+                if not group:
+                    module.fail_json(msg='group is a required option')
+                commands.extend(cmd)
+
+                if min_links != 'None':
+                    commands.append('port-channel min-links {}'.format(min_links))
+
+                if members:
+                    for m in members:
+                        commands.append('interface {}'.format(m))
+                        commands.append('channel-group {0} mode {1}'.format(group, mode))
+
+            else:
+                if members:
+                    if 'members' not in obj_in_have.keys():
+                        for m in members:
+                            commands.extend(cmd)
+                            commands.append('interface {}'.format(m))
+                            commands.append('channel-group {0} mode {1}'.format(group, mode))
+
+                    elif set(members) != set(obj_in_have['members']):
+                        missing_members = list(set(members) - set(obj_in_have['members']))
+                        for m in missing_members:
+                            commands.extend(cmd)
+                            commands.append('interface {}'.format(m))
+                            commands.append('channel-group {0} mode {1}'.format(group, mode))
+
+                        superfluous_members = list(set(obj_in_have['members']) - set(members))
+                        for m in superfluous_members:
+                            commands.extend(cmd)
+                            commands.append('interface {}'.format(m))
+                            commands.append('no channel-group {}'.format(group))
+
+    if purge:
+        for h in have:
+            obj_in_want = search_obj_in_list(h['group'], want)
+            if not obj_in_want:
+                commands.append('no interface port-channel {}'.format(h['group']))
+
+    return commands
+
+
+def map_params_to_obj(module, required_together=None):
+    obj = []
+
+    aggregate = module.params.get('aggregate')
+    if aggregate:
+        for item in aggregate:
+            for key in item:
+                if item.get(key) is None:
+                    item[key] = module.params[key]
+
+            module._check_required_together(required_together, item)
+            d = item.copy()
+            d['group'] = str(d['group'])
+            d['min_links'] = str(d['min_links'])
+
+            obj.append(d)
+    else:
+        obj.append({
+            'group': str(module.params['group']),
+            'mode': module.params['mode'],
+            'min_links': str(module.params['min_links']),
+            'members': module.params['members'],
+            'state': module.params['state']
+        })
+
+    return obj
+
+
+def parse_mode(group, member, config):
+    mode = None
+
+    for line in config.strip().split('!'):
+        match_int = re.findall(r'interface {}\\b'.format(member), line, re.M)
+        if match_int:
+            match = re.search(r'channel-group {} mode (\S+)'.format(group), line, re.M)
+            if match:
+                mode = match.group(1)
+
+    return mode
+
+
+def parse_members(group, config):
+    members = []
+
+    for line in config.strip().split('!'):
+        match_group = re.findall(r'channel-group {} mode'.format(group), line, re.M)
+        if match_group:
+            match = re.search(r'interface (\S+)', line, re.M)
+            if match:
+                members.append(match.group(1))
+
+    return members
+
+
+def get_channel(group, module):
+    channel = {}
+    config = get_config(module, flags=['| section channel-group'])
+
+    for line in config.split('\n'):
+        l = line.strip()
+        match = re.search(r'interface (\S+)', l, re.M)
+
+        if match:
+            member = match.group(1)
+            channel['mode'] = parse_mode(group, member, config)
+            channel['members'] = parse_members(group, config)
+
+    return channel
+
+
+def parse_min_links(group, config):
+    min_links = ''
+
+    for line in config.strip().split('!'):
+        match_pc = re.findall(r'interface Port-Channel{}\\b'.format(group), line, re.M)
+        if match_pc:
+            match = re.search(r'port-channel min-links (\S+)', line, re.M)
+            if match:
+                min_links = match.group(1)
+
+    return min_links
+
+
+def map_config_to_obj(module):
+    objs = list()
+    config = get_config(module, flags=['| section port-channel'])
+
+    for line in config.split('\n'):
+        l = line.strip()
+        match = re.search(r'interface Port-Channel(\S+)', l, re.M)
+        if match:
+            obj = {}
+            group = match.group(1)
+            obj['group'] = group
+            obj['min_links'] = parse_min_links(group, config)
+            obj.update(get_channel(group, module))
+            objs.append(obj)
+
+    return objs
+
+
+def main():
+    """ main entry point for module execution
+    """
+    element_spec = dict(
+        group=dict(type='int'),
+        mode=dict(choices=['active', 'on', 'passive']),
+        min_links=dict(type='int'),
+        members=dict(type='list'),
+        state=dict(default='present',
+                   choices=['present', 'absent'])
+    )
+
+    aggregate_spec = deepcopy(element_spec)
+    aggregate_spec['group'] = dict(required=True)
+
+    # remove default in aggregate spec, to handle common arguments
+    remove_default_spec(aggregate_spec)
+
+    argument_spec = dict(
+        aggregate=dict(type='list', elements='dict', options=aggregate_spec),
+        purge=dict(default=False, type='bool')
+    )
+
+    argument_spec.update(element_spec)
+    argument_spec.update(eos_argument_spec)
+
+    required_one_of = [['group', 'aggregate']]
+    required_together = [['members', 'mode']]
+    mutually_exclusive = [['group', 'aggregate']]
+    module = AnsibleModule(argument_spec=argument_spec,
+                           required_one_of=required_one_of,
+                           required_together=required_together,
+                           mutually_exclusive=mutually_exclusive,
+                           supports_check_mode=True)
+
+    warnings = list()
+    result = {'changed': False}
+    if warnings:
+        result['warnings'] = warnings
+
+    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:
+        commit = not module.check_mode
+        response = load_config(module, commands, commit=commit)
+        if response.get('diff') and module._diff:
+            result['diff'] = {'prepared': response.get('diff')}
+        result['session_name'] = response.get('session')
+        result['changed'] = True
+
+    module.exit_json(**result)
+
+if __name__ == '__main__':
+    main()

test/integration/eos.yaml

@@ -112,6 +112,14 @@
             failed_modules: "{{ failed_modules }} + [ 'eos_static_route' ]"
             test_failed: true
 
+    - block:
+      - include_role:
+          name: eos_linkagg
+        when: "limit_to in ['*', 'eos_linkagg']"
+      rescue:
+        - set_fact:
+            failed_modules: "{{ failed_modules }} + [ 'eos_linkagg' ]"
+            test_failed: true
 
 
 ###########

test/integration/targets/eos_linkagg/defaults/main.yaml

@@ -0,0 +1,3 @@
+---
+testcase: "*"
+test_items: []

test/integration/targets/eos_linkagg/meta/main.yaml

@@ -0,0 +1,2 @@
+dependencies:
+  - prepare_eos_tests

test/integration/targets/eos_linkagg/tasks/cli.yaml

@@ -0,0 +1,22 @@
+---
+- name: collect all cli test cases
+  find:
+    paths: "{{ role_path }}/tests/cli"
+    patterns: "{{ testcase }}.yaml"
+  register: test_cases
+  delegate_to: localhost
+
+- name: set test_items
+  set_fact: test_items="{{ test_cases.files | map(attribute='path') | list }}"
+
+- name: run test cases (connection=network_cli)
+  include: "{{ test_case_to_run }} ansible_connection=network_cli"
+  with_items: "{{ test_items }}"
+  loop_control:
+    loop_var: test_case_to_run
+
+- name: run test case (connection=local)
+  include: "{{ test_case_to_run }} ansible_connection=local ansible_become=no"
+  with_first_found: "{{ test_items }}"
+  loop_control:
+    loop_var: test_case_to_run

test/integration/targets/eos_linkagg/tasks/main.yaml

@@ -0,0 +1,2 @@
+---
+- { include: cli.yaml, tags: ['cli'] }