From 12d6ae8de48def443c4e71eecee879bb4320ea82 Mon Sep 17 00:00:00 2001 From: Peter Sprygada Date: Sat, 20 Aug 2016 14:26:47 -0400 Subject: [PATCH] add new functionality to iosxr_command module * commands argument now accepts a dict arguments[1] * waitfor has been renamed to wait_for with an alias to waitfor * only show commands are allowd when check mode is specified * config mode is no longer allowed in the command stack * add argument match with valid values any, all [1] The commands argument will now accept a dict argument that can specifiy the output format of the command. To specify a dict argument use the form of { command: , output: , prompt: , response: }. --- network/iosxr/iosxr_command.py | 209 +++++++++++++++++++++------------ 1 file changed, 134 insertions(+), 75 deletions(-) diff --git a/network/iosxr/iosxr_command.py b/network/iosxr/iosxr_command.py index 4996837bbfe..3e97ab4b3dd 100644 --- a/network/iosxr/iosxr_command.py +++ b/network/iosxr/iosxr_command.py @@ -21,37 +21,53 @@ DOCUMENTATION = """ module: iosxr_command version_added: "2.1" author: "Peter Sprygada (@privateip)" -short_description: Run arbitrary commands on ios devices. +short_description: Run commands on remote devices running Cisco iosxr description: - - Sends arbitrary commands to an IOSXR node and returns the results + - Sends arbitrary commands to an iosxr node and returns the results read from the device. This module includes an argument that will cause the module to wait for a specific condition before returning or timing out if the condition is not met. + - This module does not support running commands in configuration mode. + Please use M(iosxr_config) to configure iosxr devices. extends_documentation_fragment: iosxr options: commands: description: - - List of commands to send to the remote ios device over the + - List of commands to send to the remote iosxr device over the configured provider. The resulting output from the command - is returned. If the I(waitfor) argument is provided, the + is returned. If the I(wait_for) argument is provided, the module is not returned until the condition is satisfied or - the number of retires as expired. + the number of retries has expired. required: true - waitfor: + wait_for: description: - List of conditions to evaluate against the output of the - command. The task will wait for a each condition to be true + command. The task will wait for each condition to be true before moving forward. If the conditional is not true within the configured number of retries, the task fails. See examples. required: false default: null + aliases: ['waitfor'] + version_added: "2.2" + match: + description: + - The I(match) argument is used in conjunction with the + I(wait_for) argument to specify the match policy. Valid + values are C(all) or C(any). If the value is set to C(all) + then all conditionals in the wait_for must be satisfied. If + the value is set to C(any) then only one of the values must be + satisfied. + required: false + default: all + choices: ['any', 'all'] + version_added: "2.2" retries: description: - Specifies the number of retries a command should by tried before it is considered failed. The command is run on the target device every retry and evaluated against the - waitfor conditions. + I(wait_for) conditions. required: false default: 10 interval: @@ -65,31 +81,47 @@ options: """ EXAMPLES = """ +# Note: examples below use the following provider dict to handle +# transport and authentication to the node. +vars: + cli: + host: "{{ inventory_hostname }}" + username: root + password: root -- iosxr_command: - commands: - - show version - register: output +tasks: + - name: run show version on remote devices + iosxr_command: + commands: show version + provider "{{ cli }}" -- iosxr_command: - commands: - - show version - waitfor: - - "result[0] contains 6.0.0" + - name: run show version and check to see if output contains iosxr + iosxr_command: + commands: show version + wait_for: result[0] contains IOS-XR + provider "{{ cli }}" -- iosxr_command: - commands: - - show version - - show interfaces - waitfor: - - "result[1] contains MgmtEth0/0/CPU0/0" - - "result[0] contains 6.0.0" + - name: run multiple commands on remote nodes + iosxr_command: + commands: + - show version + - show interfaces + provider "{{ cli }}" + - name: run multiple commands and evaluate the output + iosxr_command: + commands: + - show version + - show interfaces + wait_for: + - result[0] contains IOS-XR + - result[1] contains Loopback0 + provider: "{{ cli }}" """ RETURN = """ stdout: - description: the set of responses from the commands + description: The set of responses from the commands returned: always type: list sample: ['...', '...'] @@ -101,78 +133,105 @@ stdout_lines: sample: [['...', '...'], ['...'], ['...']] failed_conditions: - description: the conditionals that failed - retured: failed + description: The list of conditionals that have failed + returned: failed type: list sample: ['...', '...'] """ +from ansible.module_utils.basic import get_exception +from ansible.module_utils.netcli import CommandRunner +from ansible.module_utils.netcli import AddCommandError, FailedConditionsError +from ansible.module_utils.iosxr import NetworkModule, NetworkError -import time -import shlex -import re +VALID_KEYS = ['command', 'output', 'prompt', 'response'] -INDEX_RE = re.compile(r'(\[\d+\])') - -def iterlines(stdout): +def to_lines(stdout): for item in stdout: if isinstance(item, basestring): item = str(item).split('\n') yield item +def parse_commands(module): + for cmd in module.params['commands']: + if isinstance(cmd, basestring): + cmd = dict(command=cmd, output=None) + elif 'command' not in cmd: + module.fail_json(msg='command keyword argument is required') + elif cmd.get('output') not in [None, 'text']: + module.fail_json(msg='invalid output specified for command') + elif not set(cmd.keys()).issubset(VALID_KEYS): + module.fail_json(msg='unknown command keyword specified. Valid ' + 'values are %s' % ', '.join(VALID_KEYS)) + yield cmd def main(): spec = dict( - commands=dict(type='list'), - waitfor=dict(type='list'), + # { command: , output: , prompt: , response: } + commands=dict(type='list', required=True), + + wait_for=dict(type='list', aliases=['waitfor']), + match=dict(default='all', choices=['all', 'any']), + retries=dict(default=10, type='int'), interval=dict(default=1, type='int') ) - module = get_module(argument_spec=spec, - supports_check_mode=True) + module = NetworkModule(argument_spec=spec, + connect_on_load=False, + supports_check_mode=True) - commands = module.params['commands'] + commands = list(parse_commands(module)) + conditionals = module.params['wait_for'] or list() - retries = module.params['retries'] - interval = module.params['interval'] + warnings = list() + + runner = CommandRunner(module) + + for cmd in commands: + if module.check_mode and not cmd['command'].startswith('show'): + warnings.append('only show commands are supported when using ' + 'check mode, not executing `%s`' % cmd['command']) + else: + if cmd['command'].startswith('conf'): + module.fail_json(msg='iosxr_command does not support running ' + 'config mode commands. Please use ' + 'iosxr_config instead') + try: + runner.add_command(**cmd) + except AddCommandError: + exc = get_exception() + warnings.append('duplicate command detected: %s' % cmd) + + for item in conditionals: + runner.add_conditional(item) + + runner.retries = module.params['retries'] + runner.interval = module.params['interval'] + runner.match = module.params['match'] try: - queue = set() - for entry in (module.params['waitfor'] or list()): - queue.add(Conditional(entry)) - except AttributeError: + runner.run() + except FailedConditionsError: exc = get_exception() - module.fail_json(msg=exc.message) + module.fail_json(msg=str(exc), failed_conditions=exc.failed_conditions) + except NetworkError: + exc = get_exception() + module.fail_json(msg=str(exc)) + + result = dict(changed=False, stdout=list()) + + for cmd in commands: + try: + output = runner.get_command(cmd['command']) + except ValueError: + output = 'command not executed due to check_mode, see warnings' + result['stdout'].append(output) + + result['warnings'] = warnings + result['stdout_lines'] = list(to_lines(result['stdout'])) + + module.exit_json(**result) - result = dict(changed=False) - - while retries > 0: - response = module.execute(commands) - result['stdout'] = response - - for item in list(queue): - if item(response): - queue.remove(item) - - if not queue: - break - - time.sleep(interval) - retries -= 1 - else: - failed_conditions = [item.raw for item in queue] - module.fail_json(msg='timeout waiting for value', failed_conditions=failed_conditions) - - result['stdout_lines'] = list(iterlines(result['stdout'])) - return module.exit_json(**result) - - -from ansible.module_utils.basic import * -from ansible.module_utils.urls import * -from ansible.module_utils.shell import * -from ansible.module_utils.netcfg import * -from ansible.module_utils.iosxr import * if __name__ == '__main__': - main() - + main()