initial add of eos shared module
This adds a shared module for communicating with Arista EOS devices over SSH (cli) or JSON-RPC (eapi). This modules replaces the eapi.py module previously added to module_utils. This commit includes a documentation fragment that describes the eos common arguments
This commit is contained in:
Peter Sprygada
parent
45355cd566
commit
87ccc5c869
3 changed files with 299 additions and 174 deletions
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@ -1,174 +0,0 @@
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#
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# (c) 2015 Peter Sprygada, <psprygada@ansible.com>
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#
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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#
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"""
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This module adds shared support for Arista EOS devices using eAPI over
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HTTP/S transport. It is built on module_utils/urls.py which is required
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for proper operation.
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In order to use this module, include it as part of a custom
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module as shown below.
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** Note: The order of the import statements does matter. **
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from ansible.module_utils.basic import *
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from ansible.module_utils.urls import *
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from ansible.module_utils.eapi import *
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The eapi module provides the following common argument spec:
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* host (str) - The IPv4 address or FQDN of the network device
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* port (str) - Overrides the default port to use for the HTTP/S
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connection. The default values are 80 for HTTP and
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443 for HTTPS
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* username (str) - The username to use to authenticate the HTTP/S
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connection.
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* password (str) - The password to use to authenticate the HTTP/S
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connection.
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* use_ssl (bool) - Specifies whether or not to use an encrypted (HTTPS)
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connection or not. The default value is False.
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* enable_mode (bool) - Specifies whether or not to enter `enable` mode
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prior to executing the command list. The default value is True
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* enable_password (str) - The password for entering `enable` mode
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on the switch if configured.
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* device (dict) - Used to send the entire set of connectin parameters
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as a dict object. This argument is mutually exclusive with the
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host argument
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In order to communicate with Arista EOS devices, the eAPI feature
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must be enabled and configured on the device.
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"""
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EAPI_COMMON_ARGS = dict(
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host=dict(),
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port=dict(),
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username=dict(),
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password=dict(no_log=True),
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use_ssl=dict(default=True, type='bool'),
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enable_mode=dict(default=True, type='bool'),
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enable_password=dict(no_log=True),
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device=dict()
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)
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def eapi_module(**kwargs):
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"""Append the common args to the argument_spec
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"""
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spec = kwargs.get('argument_spec') or dict()
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argument_spec = url_argument_spec()
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argument_spec.update(EAPI_COMMON_ARGS)
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if kwargs.get('argument_spec'):
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argument_spec.update(kwargs['argument_spec'])
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kwargs['argument_spec'] = argument_spec
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module = AnsibleModule(**kwargs)
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device = module.params.get('device') or dict()
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for key, value in device.iteritems():
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if key in EAPI_COMMON_ARGS:
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module.params[key] = value
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params = json_dict_unicode_to_bytes(json.loads(MODULE_COMPLEX_ARGS))
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for key, value in params.iteritems():
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if key != 'device':
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module.params[key] = value
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return module
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def eapi_url(params):
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"""Construct a valid Arista eAPI URL
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"""
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if params['use_ssl']:
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proto = 'https'
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else:
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proto = 'http'
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host = params['host']
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url = '{}://{}'.format(proto, host)
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if params['port']:
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url = '{}:{}'.format(url, params['port'])
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return '{}/command-api'.format(url)
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def to_list(arg):
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"""Convert the argument to a list object
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"""
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if isinstance(arg, (list, tuple)):
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return list(arg)
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elif arg is not None:
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return [arg]
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else:
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return []
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def eapi_body(commands, encoding, reqid=None):
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"""Create a valid eAPI JSON-RPC request message
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"""
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params = dict(version=1, cmds=to_list(commands), format=encoding)
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return dict(jsonrpc='2.0', id=reqid, method='runCmds', params=params)
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def eapi_enable_mode(params):
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"""Build commands for entering `enable` mode on the switch
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"""
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if params['enable_mode']:
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passwd = params['enable_password']
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if passwd:
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return dict(cmd='enable', input=passwd)
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else:
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return 'enable'
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def eapi_command(module, commands, encoding='json'):
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"""Send an ordered list of commands to the device over eAPI
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"""
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commands = to_list(commands)
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url = eapi_url(module.params)
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enable = eapi_enable_mode(module.params)
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if enable:
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commands.insert(0, enable)
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data = eapi_body(commands, encoding)
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data = module.jsonify(data)
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headers = {'Content-Type': 'application/json-rpc'}
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module.params['url_username'] = module.params['username']
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module.params['url_password'] = module.params['password']
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response, headers = fetch_url(module, url, data=data, headers=headers,
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method='POST')
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if headers['status'] != 200:
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module.fail_json(**headers)
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response = module.from_json(response.read())
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if 'error' in response:
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err = response['error']
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module.fail_json(msg='json-rpc error', **err)
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if enable:
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response['result'].pop(0)
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return response['result'], headers
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def eapi_configure(module, commands):
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"""Send configuration commands to the device over eAPI
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"""
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commands.insert(0, 'configure')
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response, headers = eapi_command(module, commands)
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response.pop(0)
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return response, headers
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215
lib/ansible/module_utils/eos.py
Normal file
215
lib/ansible/module_utils/eos.py
Normal file
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@ -0,0 +1,215 @@
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#
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# (c) 2015 Peter Sprygada, <psprygada@ansible.com>
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#
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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#
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NET_PASSWD_RE = re.compile(r"[\r\n]?password: $", re.I)
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NET_COMMON_ARGS = dict(
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host=dict(required=True),
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port=dict(type='int'),
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username=dict(required=True),
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password=dict(no_log=True),
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authorize=dict(default=False, type='bool'),
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auth_pass=dict(no_log=True),
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transport=dict(choices=['cli', 'eapi']),
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use_ssl=dict(default=True, type='bool')
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)
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def to_list(val):
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if isinstance(val, (list, tuple)):
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return list(val)
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elif val is not None:
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return [val]
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else:
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return list()
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class Eapi(object):
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def __init__(self, module):
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self.module = module
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# sets the module_utils/urls.py req parameters
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self.module.params['url_username'] = module.params['username']
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self.module.params['url_password'] = module.params['password']
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self.url = None
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self.enable = None
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def _get_body(self, commands, encoding, reqid=None):
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"""Create a valid eAPI JSON-RPC request message
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"""
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params = dict(version=1, cmds=commands, format=encoding)
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return dict(jsonrpc='2.0', id=reqid, method='runCmds', params=params)
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def connect(self):
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host = self.module.params['host']
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port = self.module.params['port']
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if self.module.params['use_ssl']:
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proto = 'https'
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if not port:
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port = 443
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else:
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proto = 'http'
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if not port:
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port = 80
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self.url = '%s://%s:%s/command-api' % (proto, host, port)
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def authorize(self):
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if self.module.params['auth_pass']:
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passwd = self.module.params['auth_pass']
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self.enable = dict(cmd='enable', input=passwd)
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else:
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self.enable = 'enable'
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def send(self, commands, encoding='json'):
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"""Send commands to the device.
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"""
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clist = to_list(commands)
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if self.enable is not None:
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clist.insert(0, self.enable)
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data = self._get_body(clist, encoding)
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data = self.module.jsonify(data)
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headers = {'Content-Type': 'application/json-rpc'}
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response, headers = fetch_url(self.module, self.url, data=data,
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headers=headers, method='POST')
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if headers['status'] != 200:
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self.module.fail_json(**headers)
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response = self.module.from_json(response.read())
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if 'error' in response:
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err = response['error']
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self.module.fail_json(msg='json-rpc error', **err)
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if self.enable:
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response['result'].pop(0)
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return response['result']
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class Cli(object):
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def __init__(self, module):
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self.module = module
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self.shell = None
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def connect(self, **kwargs):
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host = self.module.params['host']
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port = self.module.params['port'] or 22
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username = self.module.params['username']
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password = self.module.params['password']
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self.shell = Shell()
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self.shell.open(host, port=port, username=username, password=password)
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def authorize(self):
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passwd = self.module.params['auth_pass']
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self.send(Command('enable', prompt=NET_PASSWD_RE, response=passwd))
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def send(self, commands, encoding='text'):
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return self.shell.send(commands)
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class EosModule(AnsibleModule):
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def __init__(self, *args, **kwargs):
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super(EosModule, self).__init__(*args, **kwargs)
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self.connection = None
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self._config = None
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@property
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def config(self):
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if not self._config:
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self._config = self.get_config()
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return self._config
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def connect(self):
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if self.params['transport'] == 'eapi':
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self.connection = Eapi(self)
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else:
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self.connection = Cli(self)
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try:
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self.connection.connect()
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self.execute('terminal length 0')
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if self.params['authorize']:
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self.connection.authorize()
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except Exception, exc:
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self.fail_json(msg=exc.message)
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def configure(self, commands):
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commands = to_list(commands)
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commands.insert(0, 'configure terminal')
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responses = self.execute(commands)
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responses.pop(0)
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return responses
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def execute(self, commands, **kwargs):
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try:
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return self.connection.send(commands, **kwargs)
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except Exception, exc:
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self.fail_json(msg=exc.message, commands=commands)
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def disconnect(self):
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self.connection.close()
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def parse_config(self, cfg):
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return parse(cfg, indent=3)
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def get_config(self):
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cmd = 'show running-config'
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if self.params['include_defaults']:
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cmd += ' all'
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if self.params['transport'] == 'cli':
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return self.execute(cmd)[0]
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else:
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resp = self.execute(cmd, encoding='text')
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return resp[0]['output']
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def get_module(**kwargs):
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"""Return instance of EosModule
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"""
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argument_spec = NET_COMMON_ARGS.copy()
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if kwargs.get('argument_spec'):
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argument_spec.update(kwargs['argument_spec'])
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kwargs['argument_spec'] = argument_spec
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kwargs['check_invalid_arguments'] = False
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module = EosModule(**kwargs)
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# HAS_PARAMIKO is set by module_utils/shell.py
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if module.params['transport'] == 'cli' and not HAS_PARAMIKO:
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module.fail_json(msg='paramiko is required but does not appear to be installed')
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# copy in values from local action.
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params = json_dict_unicode_to_bytes(json.loads(MODULE_COMPLEX_ARGS))
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for key, value in params.iteritems():
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module.params[key] = value
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module.connect()
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return module
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84
lib/ansible/utils/module_docs_fragments/eos.py
Normal file
84
lib/ansible/utils/module_docs_fragments/eos.py
Normal file
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@ -0,0 +1,84 @@
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#
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# (c) 2015, Peter Sprygada <psprygada@ansible.com>
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#
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
|
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
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||||
# You should have received a copy of the GNU General Public License
|
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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class ModuleDocFragment(object):
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# Standard files documentation fragment
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DOCUMENTATION = """
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options:
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host:
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description:
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- Specifies the DNS host name or address for connecting to the remote
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device over the specified transport. The value of host is used as
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the destination address for the transport.
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required: true
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port:
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description:
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- Specifies the port to use when buiding the connection to the remote
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device. This value applies to either I(cli) or I(eapi). The port
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value will default to the approriate transport common port if
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none is provided in the task. (cli=22, http=80, https=443).
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required: false
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default: 0 (use common port)
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username:
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description:
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- Configures the usename to use to authenticate the connection to
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the remote device. The value of I(username) is used to authenticate
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either the CLI login or the eAPI authentication depending on which
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transport is used.
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required: true
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password:
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description:
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- Specifies the password to use when authentication the connection to
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the remote device. This is a common argument used for either I(cli)
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or I(eapi) transports.
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required: false
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default: null
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authorize:
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description:
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- Instructs the module to enter priviledged mode on the remote device
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before sending any commands. If not specified, the device will
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attempt to excecute all commands in non-priviledged mode.
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required: false
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default: false
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choices: BOOLEANS
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auth_pass:
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description:
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- Specifies the password to use if required to enter privileged mode
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on the remote device. If I(authorize) is false, then this argument
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does nothing
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required: false
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default: none
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transport:
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description:
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- Configures the transport connection to use when connecting to the
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remote device. The transport argument supports connectivity to the
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device over cli (ssh) or eapi.
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required: true
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default: cli
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use_ssl:
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description:
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- Configures the I(transport) to use SSL if set to true only when the
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I(transport) argument is configured as eapi. If the transport
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argument is not eapi, this value is ignored
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required: false
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default: true
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choices: BOOLEANS
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"""
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Loading…
Reference in a new issue