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#!/usr/bin/python
# -*- coding: utf-8 -*-
# (c) 2016, Cumulus Networks <ce-ceng@cumulusnetworks.com>
#
# 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': 'community',
'version': '1.0'}
DOCUMENTATION = '''
---
module: cl_ports
version_added: "2.1"
author: "Cumulus Networks (@CumulusNetworks)"
short_description: Configure Cumulus Switch port attributes (ports.conf)
description:
- Set the initial port attribute defined in the Cumulus Linux ports.conf,
file. This module does not do any error checking at the moment. Be careful
to not include ports that do not exist on the switch. Carefully read the
original ports.conf file for any exceptions or limitations.
For more details go the Configure Switch Port Attribute Documentation at
U(http://docs.cumulusnetworks.com).
options:
speed_10g:
description:
- List of ports to run initial run at 10G.
speed_40g:
description:
- List of ports to run initial run at 40G.
speed_4_by_10g:
description:
- List of 40G ports that will be unganged to run as 4 10G ports.
speed_40g_div_4:
description:
- List of 10G ports that will be ganged to form a 40G port.
'''
EXAMPLES = '''
Example playbook entries using the cl_ports module to manage the switch
attributes defined in the ports.conf file on Cumulus Linux
## Unganged port config using simple args
- name: configure ports.conf setup
cl_ports:
speed_4_by_10g: "swp1, swp32"
speed_40g: "swp2-31"
notify: restart switchd
## Unganged port configuration on certain ports using complex args
- name: configure ports.conf setup
cl_ports:
speed_4_by_10g: ['swp1-3', 'swp6']
speed_40g: ['swp4-5', 'swp7-32']
notify: restart switchd
'''
RETURN = '''
changed:
description: whether the interface was changed
returned: changed
type: bool
sample: True
msg:
description: human-readable report of success or failure
returned: always
type: string
sample: "interface bond0 config updated"
'''
PORTS_CONF = '/etc/cumulus/ports.conf'
def hash_existing_ports_conf(module):
module.ports_conf_hash = {}
if not os.path.exists(PORTS_CONF):
return False
try:
existing_ports_conf = open(PORTS_CONF).readlines()
except IOError:
error_msg = get_exception()
_msg = "Failed to open %s: %s" % (PORTS_CONF, error_msg)
module.fail_json(msg=_msg)
return # for testing only should return on module.fail_json
for _line in existing_ports_conf:
_m0 = re.match(r'^(\d+)=(\w+)', _line)
if _m0:
_portnum = int(_m0.group(1))
_speed = _m0.group(2)
module.ports_conf_hash[_portnum] = _speed
def generate_new_ports_conf_hash(module):
new_ports_conf_hash = {}
convert_hash = {
'speed_40g_div_4': '40G/4',
'speed_4_by_10g': '4x10G',
'speed_10g': '10G',
'speed_40g': '40G'
}
for k in module.params.keys():
port_range = module.params[k]
port_setting = convert_hash[k]
if port_range:
port_range = [x for x in port_range if x]
for port_str in port_range:
port_range_str = port_str.replace('swp', '').split('-')
if len(port_range_str) == 1:
new_ports_conf_hash[int(port_range_str[0])] = \
port_setting
else:
int_range = map(int, port_range_str)
portnum_range = range(int_range[0], int_range[1]+1)
for i in portnum_range:
new_ports_conf_hash[i] = port_setting
module.new_ports_hash = new_ports_conf_hash
def compare_new_and_old_port_conf_hash(module):
ports_conf_hash_copy = module.ports_conf_hash.copy()
module.ports_conf_hash.update(module.new_ports_hash)
port_num_length = len(module.ports_conf_hash.keys())
orig_port_num_length = len(ports_conf_hash_copy.keys())
if port_num_length != orig_port_num_length:
module.fail_json(msg="Port numbering is wrong. \
Too many or two few ports configured")
return False
elif ports_conf_hash_copy == module.ports_conf_hash:
return False
return True
def make_copy_of_orig_ports_conf(module):
if os.path.exists(PORTS_CONF + '.orig'):
return
try:
shutil.copyfile(PORTS_CONF, PORTS_CONF + '.orig')
except IOError:
error_msg = get_exception()
_msg = "Failed to save the original %s: %s" % (PORTS_CONF, error_msg)
module.fail_json(msg=_msg)
return # for testing only
def write_to_ports_conf(module):
"""
use tempfile to first write out config in temp file
then write to actual location. may help prevent file
corruption. Ports.conf is a critical file for Cumulus.
Don't want to corrupt this file under any circumstance.
"""
temp = tempfile.NamedTemporaryFile()
try:
try:
temp.write('# Managed By Ansible\n')
for k in sorted(module.ports_conf_hash.keys()):
port_setting = module.ports_conf_hash[k]
_str = "%s=%s\n" % (k, port_setting)
temp.write(_str)
temp.seek(0)
shutil.copyfile(temp.name, PORTS_CONF)
except IOError:
error_msg = get_exception()
module.fail_json(
msg="Failed to write to %s: %s" % (PORTS_CONF, error_msg))
finally:
temp.close()
def main():
module = AnsibleModule(
argument_spec=dict(
speed_40g_div_4=dict(type='list'),
speed_4_by_10g=dict(type='list'),
speed_10g=dict(type='list'),
speed_40g=dict(type='list')
),
required_one_of=[['speed_40g_div_4',
'speed_4_by_10g',
'speed_10g',
'speed_40g']]
)
_changed = False
hash_existing_ports_conf(module)
generate_new_ports_conf_hash(module)
if compare_new_and_old_port_conf_hash(module):
make_copy_of_orig_ports_conf(module)
write_to_ports_conf(module)
_changed = True
_msg = "/etc/cumulus/ports.conf changed"
else:
_msg = 'No change in /etc/ports.conf'
module.exit_json(changed=_changed, msg=_msg)
# import module snippets
from ansible.module_utils.basic import *
# from ansible.module_utils.urls import *
import os
import tempfile
import shutil
if __name__ == '__main__':
main()
|
