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Add netconf_get module (#39869)
* Add netconf_get module Implements part-1 of proposal #104 https://github.com/ansible/proposals/issues/104 * Add netconf_get module * Refactor `get`, `get_config`, `lock`, `unlock` and `discard_changes` netconf plugin api's * Add netconf module_utils file which netconf module related common functions * Refactor junos and iosxr netconf plugins * Fix source option handling * Fix review comments * Update botmeta file * Update review comments and add support for lock * Lock update fix * Fix CI issue * Add integration test and minor fixes * Fix review comments * Fix CI failure * Fix CI issues * Fix CI issues * Fix review comments and update integration test * Fix review comments * Fix review comments * Fix review comments Fix reveiw comments
This commit is contained in:
Ganesh Nalawade
GitHub
parent
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commit
30f992f260
16 changed files with 841 additions and 119 deletions
262
lib/ansible/modules/network/netconf/netconf_get.py
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lib/ansible/modules/network/netconf/netconf_get.py
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#!/usr/bin/python
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# -*- coding: utf-8 -*-
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# (c) 2018, Ansible by Red Hat, inc
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# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
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from __future__ import absolute_import, division, print_function
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__metaclass__ = type
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ANSIBLE_METADATA = {'metadata_version': '1.1',
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'status': ['preview'],
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'supported_by': 'network'}
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DOCUMENTATION = """
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---
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module: netconf_get
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version_added: "2.6"
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author:
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- "Ganesh Nalawade (@ganeshrn)"
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- "Sven Wisotzky (@wisotzky)"
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short_description: Fetch configuration/state data from NETCONF enabled network devices.
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description:
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- NETCONF is a network management protocol developed and standardized by
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the IETF. It is documented in RFC 6241.
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- This module allows the user to fetch configuration and state data from NETCONF
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enabled network devices.
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options:
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source:
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description:
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- This argument specifies the datastore from which configuration data should be fetched.
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Valid values are I(running), I(candidate) and I(startup). If the C(source) value is not
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set both configuration and state information are returned in response from running datastore.
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choices: ['running', 'candidate', 'startup']
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filter:
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description:
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- This argument specifies the XML string which acts as a filter to restrict the portions of
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the data to be are retrieved from the remote device. If this option is not specified entire
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configuration or state data is returned in result depending on the value of C(source)
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option. The C(filter) value can be either XML string or XPath, if the filter is in
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XPath format the NETCONF server running on remote host should support xpath capability
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else it will result in an error.
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display:
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description:
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- Encoding scheme to use when serializing output from the device. The option I(json) will
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serialize the output as JSON data. If the option value is I(json) it requires jxmlease
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to be installed on control node. The option I(pretty) is similar to received XML response
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but is using human readable format (spaces, new lines). The option value I(xml) is similar
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to received XML response but removes all XML namespaces.
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choices: ['json', 'pretty', 'xml']
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lock:
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description:
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- Instructs the module to explicitly lock the datastore specified as C(source) before fetching
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configuration and/or state information from remote host. If the value is I(never) in that case
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the C(source) datastore is never locked, if the value is I(if-supported) the C(source) datastore
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is locked only if the Netconf server running on remote host supports locking of that datastore,
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if the lock on C(source) datastore is not supported module will report appropriate error before
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executing lock. If the value is I(always) the lock operation on C(source) datastore will always
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be executed irrespective if the remote host supports it or not, if it doesn't the module with
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fail will the execption message received from remote host and might vary based on the platform.
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default: 'never'
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choices: ['never', 'always', 'if-supported']
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requirements:
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- ncclient (>=v0.5.2)
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- jxmlease
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notes:
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- This module requires the NETCONF system service be enabled on
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the remote device being managed.
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- This module supports the use of connection=netconf
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"""
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EXAMPLES = """
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- name: Get running configuration and state data
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netconf_get:
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- name: Get configuration and state data from startup datastore
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netconf_get:
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source: startup
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- name: Get system configuration data from running datastore state (junos)
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netconf_get:
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source: running
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filter: <configuration><system></system></configuration>
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- name: Get configuration and state data in JSON format
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netconf_get:
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display: json
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- name: get schema list using subtree w/ namespaces
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netconf_get:
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format: json
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filter: <netconf-state xmlns="urn:ietf:params:xml:ns:yang:ietf-netconf-monitoring"><schemas><schema/></schemas></netconf-state>
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lock: False
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- name: get schema list using xpath
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netconf_get:
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format: json
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filter: /netconf-state/schemas/schema
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- name: get interface confiugration with filter (iosxr)
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netconf_get:
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filter: <interface-configurations xmlns="http://cisco.com/ns/yang/Cisco-IOS-XR-ifmgr-cfg"></interface-configurations>
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- name: Get system configuration data from running datastore state (sros)
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netconf_get:
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source: running
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filter: <state xmlns="urn:nokia.com:sros:ns:yang:sr:conf"/>
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lock: True
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- name: Get state data (sros)
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netconf_get:
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filter: <state xmlns="urn:nokia.com:sros:ns:yang:sr:state"/>
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"""
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RETURN = """
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stdout:
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description: The raw XML string containing configuration or state data
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received from the underlying ncclient library.
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returned: always apart from low-level errors (such as action plugin)
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type: string
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sample: '...'
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stdout_lines:
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description: The value of stdout split into a list
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returned: always apart from low-level errors (such as action plugin)
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type: list
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sample: ['...', '...']
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output:
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description: Based on the value of display option will return either the set of
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transformed XML to JSON format from the RPC response with type dict
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or pretty XML string response (human-readable) or response with
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namespace removed from XML string.
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returned: when the display format is selected as JSON it is returned as dict type, if the
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display format is xml or pretty pretty it is retured as a string apart from low-level
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errors (such as action plugin).
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type: complex
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contains:
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formatted_output:
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- Contains formatted response received from remote host as per the value in display format.
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"""
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import sys
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try:
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from lxml.etree import Element, SubElement, tostring, fromstring, XMLSyntaxError
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except ImportError:
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from xml.etree.ElementTree import Element, SubElement, tostring, fromstring
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if sys.version_info < (2, 7):
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from xml.parsers.expat import ExpatError as XMLSyntaxError
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else:
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from xml.etree.ElementTree import ParseError as XMLSyntaxError
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from ansible.module_utils.basic import AnsibleModule
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from ansible.module_utils.network.netconf.netconf import get_capabilities, locked_config, get_config, get
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from ansible.module_utils.network.common.netconf import remove_namespaces
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try:
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import jxmlease
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HAS_JXMLEASE = True
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except ImportError:
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HAS_JXMLEASE = False
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def get_filter_type(filter):
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if not filter:
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return None
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else:
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try:
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fromstring(filter)
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return 'subtree'
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except XMLSyntaxError:
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return 'xpath'
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def main():
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"""entry point for module execution
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"""
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argument_spec = dict(
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source=dict(choices=['running', 'candidate', 'startup']),
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filter=dict(),
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display=dict(choices=['json', 'pretty', 'xml']),
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lock=dict(default='never', choices=['never', 'always', 'if-supported'])
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)
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module = AnsibleModule(argument_spec=argument_spec,
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supports_check_mode=True)
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capabilities = get_capabilities(module)
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operations = capabilities['device_operations']
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source = module.params['source']
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filter = module.params['filter']
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filter_type = get_filter_type(filter)
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lock = module.params['lock']
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display = module.params['display']
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if source == 'candidate' and not operations.get('supports_commit', False):
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module.fail_json(msg='candidate source is not supported on this device')
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if source == 'startup' and not operations.get('supports_startup', False):
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module.fail_json(msg='startup source is not supported on this device')
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if filter_type == 'xpath' and not operations.get('supports_xpath', False):
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module.fail_json(msg="filter value '%s' of type xpath is not supported on this device" % filter)
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execute_lock = True if lock in ('always', 'if-supported') else False
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if lock == 'always' and not operations.get('supports_lock', False):
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module.fail_json(msg='lock operation is not supported on this device')
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if execute_lock:
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if source is None:
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# if source is None, in that case operation is 'get' and `get` supports
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# fetching data only from running datastore
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if 'running' not in operations.get('lock_datastore', []):
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# lock is not supported, don't execute lock operation
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if lock == 'if-supported':
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execute_lock = False
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else:
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module.warn("lock operation on 'running' source is not supported on this device")
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else:
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if source not in operations.get('lock_datastore', []):
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if lock == 'if-supported':
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# lock is not supported, don't execute lock operation
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execute_lock = False
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else:
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module.warn("lock operation on '%s' source is not supported on this device" % source)
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if display == 'json' and not HAS_JXMLEASE:
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module.fail_json(msg='jxmlease is required to display response in json format'
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'but does not appear to be installed. '
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'It can be installed using `pip install jxmlease`')
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filter_spec = (filter_type, filter) if filter_type else None
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if source is not None:
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response = get_config(module, source, filter_spec, execute_lock)
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else:
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response = get(module, filter_spec, execute_lock)
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xml_resp = tostring(response)
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output = None
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if display == 'xml':
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output = remove_namespaces(xml_resp)
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elif display == 'json':
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try:
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output = jxmlease.parse(xml_resp)
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except:
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raise ValueError(xml_resp)
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elif display == 'pretty':
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output = tostring(response, pretty_print=True)
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result = {
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'stdout': xml_resp,
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'output': output
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}
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module.exit_json(**result)
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if __name__ == '__main__':
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main()
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