adds two new plugins that use ansible-connection for persistence (#18572)

* adds new connection plugin `network_cli` which builds on paramiko
* adds new plugin `terminal` used for manipulating network_cli terminals
* adds new field to play_context `network_os` settable as ansible_network_os

This commit adds the plugins necesary to establish a persistent cli connection
to network devices of ssh.  It builds on the paramiko connection plugin
to create a shell environment that will persistent through ansible-connection.
The `newtork_cli` plugin then uses the network_os in the instance of
PlayContext to load the appropriate network OS environment plugin for
handling opening and closing of shells as well as privilege escalation.
pull/18630/merge
Peter Sprygada 8 years ago committed by GitHub
parent 54c5ea29bb
commit 9aa8547016

@ -60,6 +60,7 @@ MAGIC_VARIABLE_MAPPING = dict(
private_key_file = ('ansible_ssh_private_key_file', 'ansible_private_key_file'),
pipelining = ('ansible_ssh_pipelining', 'ansible_pipelining'),
shell = ('ansible_shell_type',),
network_os = ('ansible_network_os',),
become = ('ansible_become',),
become_method = ('ansible_become_method',),
become_user = ('ansible_become_user',),
@ -164,6 +165,7 @@ class PlayContext(Base):
_private_key_file = FieldAttribute(isa='string', default=C.DEFAULT_PRIVATE_KEY_FILE)
_timeout = FieldAttribute(isa='int', default=C.DEFAULT_TIMEOUT)
_shell = FieldAttribute(isa='string')
_network_os = FieldAttribute(isa='string')
_ssh_args = FieldAttribute(isa='string', default=C.ANSIBLE_SSH_ARGS)
_ssh_common_args = FieldAttribute(isa='string')
_sftp_extra_args = FieldAttribute(isa='string')

@ -509,3 +509,11 @@ strategy_loader = PluginLoader(
'strategy_plugins',
required_base_class='StrategyBase',
)
terminal_loader = PluginLoader(
'TerminalModule',
'ansible.plugins.terminal',
'terminal_plugins',
'terminal_plugins'
)

@ -0,0 +1,190 @@
#
# (c) 2016 Red Hat Inc.
#
# 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/>.
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
import re
import socket
import json
import signal
import datetime
from ansible.errors import AnsibleConnectionFailure
from ansible.module_utils.six.moves import StringIO
from ansible.plugins import terminal_loader
from ansible.plugins.connection.paramiko_ssh import Connection as _Connection
class Connection(_Connection):
''' CLI SSH based connections on Paramiko '''
transport = 'network_cli'
has_pipelining = False
def __init__(self, play_context, new_stdin, *args, **kwargs):
super(Connection, self).__init__(play_context, new_stdin, *args, **kwargs)
assert self._play_context.network_os, 'ansible_network_os must be set'
self._terminal = terminal_loader.get(self._play_context.network_os, self)
if not self._terminal:
raise AnsibleConnectionFailure('network os %s is not supported' % self._play_context.network_os)
self._shell = None
self._matched_prompt = None
self._matched_pattern = None
self._last_response = None
self._history = list()
def update_play_context(self, play_context):
if self._play_context.become is False and play_context.become is True:
auth_pass = play_context.become_pass
self._terminal.on_authorize(passwd=auth_pass)
elif self._play_context.become is True and not play_context.become:
self._terminal.on_deauthorize()
self._play_context = play_context
def _connect(self):
super(Connection, self)._connect()
return (0, 'connected', '')
def open_shell(self, timeout=10):
self._shell = self.ssh.invoke_shell()
self._shell.settimeout(self._play_context.timeout)
self.receive()
if self._shell:
self._terminal.on_open_shell()
if hasattr(self._play_context, 'become'):
if self._play_context.become:
auth_pass = self._play_context.become_pass
self._terminal.on_authorize(passwd=auth_pass)
def close(self):
self.close_shell()
super(Connection, self).close()
def close_shell(self):
if self._shell:
self._terminal.on_close_shell()
if self._terminal.supports_multiplexing and self._shell:
self._shell.close()
self._shell = None
return (0, 'shell closed', '')
def receive(self, obj=None):
recv = StringIO()
handled = False
self._matched_prompt = None
while True:
data = self._shell.recv(256)
recv.write(data)
recv.seek(recv.tell() - 256)
window = self._strip(recv.read())
if obj and (obj.get('prompt') and not handled):
handled = self._handle_prompt(window, obj)
if self._find_prompt(window):
self._last_response = recv.getvalue()
resp = self._strip(self._last_response)
return self._sanitize(resp, obj)
def send(self, obj):
try:
command = obj['command']
self._history.append(command)
self._shell.sendall('%s\r' % command)
return self.receive(obj)
except (socket.timeout, AttributeError):
raise AnsibleConnectionFailure("timeout trying to send command: %s" % command.strip())
def _strip(self, data):
for regex in self._terminal.ansi_re:
data = regex.sub('', data)
return data
def _handle_prompt(self, resp, obj):
prompt = re.compile(obj['prompt'], re.I)
answer = obj['answer']
match = prompt.search(resp)
if match:
self._shell.sendall('%s\r' % answer)
return True
def _sanitize(self, resp, obj=None):
cleaned = []
command = obj.get('command') if obj else None
for line in resp.splitlines():
if (command and line.startswith(command.strip())) or self._find_prompt(line):
continue
cleaned.append(line)
return str("\n".join(cleaned)).strip()
def _find_prompt(self, response):
for regex in self._terminal.terminal_errors_re:
if regex.search(response):
raise AnsibleConnectionFailure(response)
for regex in self._terminal.terminal_prompts_re:
match = regex.search(response)
if match:
self._matched_pattern = regex.pattern
self._matched_prompt = match.group()
return True
def alarm_handler(self, signum, frame):
self.close_shell()
def exec_command(self, cmd):
''' {'command': <str>, 'prompt': <str>, 'answer': <str>} '''
try:
obj = json.loads(cmd)
except ValueError:
obj = {'command': str(cmd).strip()}
if obj['command'] == 'close_shell()':
return self.close_shell()
elif obj['command'] == 'prompt()':
return (0, self._matched_prompt, '')
elif obj['command'] == 'history()':
return (0, self._history, '')
try:
if self._shell is None:
self.open_shell()
except AnsibleConnectionFailure as exc:
return (1, '', str(exc))
try:
out = self.send(obj)
return (0, out, '')
except (AnsibleConnectionFailure, ValueError) as exc:
return (1, '', str(exc))

@ -421,8 +421,9 @@ class Connection(ConnectionBase):
SSH_CONNECTION_CACHE.pop(cache_key, None)
SFTP_CONNECTION_CACHE.pop(cache_key, None)
if self.sftp is not None:
self.sftp.close()
if hasattr(self, 'sftp'):
if self.sftp is not None:
self.sftp.close()
if C.HOST_KEY_CHECKING and C.PARAMIKO_RECORD_HOST_KEYS and self._any_keys_added():

@ -0,0 +1,71 @@
#
# (c) 2016 Red Hat Inc.
#
# 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/>.
#
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
import re
from abc import ABCMeta, abstractmethod
from ansible.compat.six import with_metaclass
from ansible.errors import AnsibleConnectionFailure
class TerminalBase(with_metaclass(ABCMeta, object)):
'''
A base class for implementing cli connections
'''
terminalprompts_re = []
terminalerrors_re = []
ansi_re = [
re.compile(r'(\x1b\[\?1h\x1b=)'),
re.compile(r'\x08.')
]
supports_multiplexing = True
def __init__(self, connection):
self._connection = connection
def _exec_cli_command(self, cmd, check_rc=True):
rc, out, err = self._connection.exec_command(cmd)
if check_rc and rc != 0:
raise AnsibleConnectionFailure(err)
return rc, out, err
def _get_prompt(self):
for cmd in ['\n', 'prompt()']:
rc, out, err = self._exec_cli_command(cmd)
return out
def on_open_shell(self):
pass
def on_close_shell(self):
pass
def on_authorize(self, passwd=None):
pass
def on_deauthorize(self):
pass

@ -0,0 +1,75 @@
#
# (c) 2016 Red Hat Inc.
#
# 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/>.
#
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
import re
import json
from ansible.plugins.terminal import TerminalBase
from ansible.errors import AnsibleConnectionFailure
class TerminalModule(TerminalBase):
terminal_prompts_re = [
re.compile(r"[\r\n]?[\w+\-\.:\/\[\]]+(?:\([^\)]+\)){,3}(?:>|#) ?$"),
re.compile(r"\[\w+\@[\w\-\.]+(?: [^\]])\] ?[>#\$] ?$")
]
terminal_errors_re = [
re.compile(r"% ?Error"),
re.compile(r"^% \w+", re.M),
re.compile(r"% ?Bad secret"),
re.compile(r"invalid input", re.I),
re.compile(r"(?:incomplete|ambiguous) command", re.I),
re.compile(r"connection timed out", re.I),
re.compile(r"[^\r\n]+ not found", re.I),
re.compile(r"'[^']' +returned error code: ?\d+"),
]
def authorize(self, passwd=None):
if self._get_prompt().endswith('#'):
return
cmd = {'command': 'enable'}
if passwd:
cmd['prompt'] = r"[\r\n]?password: $"
cmd['answer'] = passwd
try:
self._exec_cli_command(json.dumps(cmd))
self._exec_cli_command('terminal pager 0')
except AnsibleConnectionFailure:
raise AnsibleConnectionFailure('unable to elevate privilege to enable mode')
def on_deauthorize(self):
prompt = self._get_prompt()
if prompt is None:
# if prompt is None most likely the terminal is hung up at a prompt
return
if '(config' in prompt:
self._exec_cli_command('end')
self._exec_cli_command('disable')
elif prompt.endswith('#'):
self._exec_cli_command('disable')

@ -0,0 +1,82 @@
#
# (c) 2016 Red Hat Inc.
#
# 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/>.
#
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
import re
import json
from ansible.plugins.terminal import TerminalBase
from ansible.errors import AnsibleConnectionFailure
class TerminalModule(TerminalBase):
terminal_prompts_re = [
re.compile(r"[\r\n]?[\w+\-\.:\/\[\]]+(?:\([^\)]+\)){,3}(?:>|#) ?$"),
re.compile(r"\[\w+\@[\w\-\.]+(?: [^\]])\] ?[>#\$] ?$")
]
terminal_errors_re = [
re.compile(r"% ?Error"),
re.compile(r"^% \w+", re.M),
re.compile(r"% User not present"),
re.compile(r"% ?Bad secret"),
re.compile(r"invalid input", re.I),
re.compile(r"(?:incomplete|ambiguous) command", re.I),
re.compile(r"connection timed out", re.I),
re.compile(r"[^\r\n]+ not found", re.I),
re.compile(r"'[^']' +returned error code: ?\d+"),
re.compile(r"[^\r\n]\/bin\/(?:ba)?sh")
]
def on_open_shell(self):
try:
self._exec_cli_command('terminal length 0')
except AnsibleConnectionFailure:
raise AnsibleConnectionFailure('unable to set terminal parameters')
def on_authorize(self, passwd=None):
if self._get_prompt().endswith('#'):
return
cmd = {'command': 'enable'}
if passwd:
cmd['prompt'] = r"[\r\n]?password: $"
cmd['answer'] = passwd
try:
self._exec_cli_command(json.dumps(cmd))
except AnsibleConnectionFailure:
raise AnsibleConnectionFailure('unable to elevate privilege to enable mode')
def on_deauthorize(self):
prompt = self._get_prompt()
if prompt is None:
# if prompt is None most likely the terminal is hung up at a prompt
return
if '(config' in prompt:
self._exec_cli_command('end')
self._exec_cli_command('disable')
elif prompt.endswith('#'):
self._exec_cli_command('disable')

@ -0,0 +1,82 @@
#
# (c) 2016 Red Hat Inc.
#
# 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/>.
#
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
import re
import json
from ansible.plugins.terminal import TerminalBase
from ansible.errors import AnsibleConnectionFailure
class TerminalModule(TerminalBase):
terminal_prompts_re = [
re.compile(r"[\r\n]?[\w+\-\.:\/\[\]]+(?:\([^\)]+\)){,3}(?:>|#) ?$"),
re.compile(r"\[\w+\@[\w\-\.]+(?: [^\]])\] ?[>#\$] ?$")
]
terminal_errors_re = [
re.compile(r"% ?Error"),
re.compile(r"^% \w+", re.M),
re.compile(r"% ?Bad secret"),
re.compile(r"invalid input", re.I),
re.compile(r"(?:incomplete|ambiguous) command", re.I),
re.compile(r"connection timed out", re.I),
re.compile(r"[^\r\n]+ not found", re.I),
re.compile(r"'[^']' +returned error code: ?\d+"),
]
supports_multiplexing = False
def on_open_shell(self):
try:
self._exec_cli_command('terminal length 0')
except AnsibleConnectionFailure:
raise AnsibleConnectionFailure('unable to set terminal parameters')
def on_authorize(self, passwd=None):
if self._get_prompt().endswith('#'):
return
cmd = {'command': 'enable'}
if passwd:
cmd['prompt'] = r"[\r\n]?password: $"
cmd['answer'] = passwd
try:
self._exec_cli_command(json.dumps(cmd))
except AnsibleConnectionFailure:
raise AnsibleConnectionFailure('unable to elevate privilege to enable mode')
def on_deauthorize(self):
prompt = self._get_prompt()
if prompt is None:
# if prompt is None most likely the terminal is hung up at a prompt
return
if '(config' in prompt:
self._exec_cli_command('end')
self._exec_cli_command('disable')
elif prompt.endswith('#'):
self._exec_cli_command('disable')

@ -0,0 +1,55 @@
#
# (c) 2016 Red Hat Inc.
#
# 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/>.
#
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
import re
import json
from ansible.plugins.terminal import TerminalBase
from ansible.errors import AnsibleConnectionFailure
class TerminalModule(TerminalBase):
terminal_prompts_re = [
re.compile(r"[\r\n]?[\w+\-\.:\/\[\]]+(?:\([^\)]+\)){,3}(?:>|#) ?$"),
re.compile(r"\[\w+\@[\w\-\.]+(?: [^\]])\] ?[>#\$] ?$")
]
terminal_errors_re = [
re.compile(r"% ?Error"),
re.compile(r"% ?Bad secret"),
re.compile(r"invalid input", re.I),
re.compile(r"(?:incomplete|ambiguous) command", re.I),
re.compile(r"connection timed out", re.I),
re.compile(r"[^\r\n]+ not found", re.I),
re.compile(r"'[^']' +returned error code: ?\d+"),
]
supports_multiplexing = False
def on_open_shell(self):
try:
for cmd in ['terminal length 0', 'terminal exec prompt no-timestamp']:
self._connection.exec_command(cmd)
except AnsibleConnectionFailure:
raise AnsibleConnectionFailure('unable to set terminal parameters')

@ -0,0 +1,47 @@
#
# (c) 2016 Red Hat Inc.
#
# 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/>.
#
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
import re
from ansible.plugins.terminal import TerminalBase
from ansible.errors import AnsibleConnectionFailure
class TerminalModule(TerminalBase):
terminal_prompts_re = [
re.compile(r"[\r\n]?[\w+\-\.:\/\[\]]+(?:\([^\)]+\)){,3}(?:>|#) ?$"),
re.compile(r"[\r\n]?[\w+\-\.:\/\[\]]+(?:\([^\)]+\)){,3}(?:>|#) ?$"),
]
terminal_errors_re = [
re.compile(r"unknown command"),
re.compile(r"syntax error,")
]
def on_open_shell(self):
try:
for c in ['set cli timestamp disable', 'set cli screen-length 0']:
self._exec_cli_command(c)
except AnsibleConnectionFailure:
raise AnsibleConnectionFailure('unable to set terminal parameters')

@ -0,0 +1,56 @@
#
# (c) 2016 Red Hat Inc.
#
# 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/>.
#
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
import re
from ansible.plugins.terminal import TerminalBase
from ansible.errors import AnsibleConnectionFailure
class TerminalModule(TerminalBase):
terminal_prompts_re = [
re.compile(r'[\r\n]?[a-zA-Z]{1}[a-zA-Z0-9-]*[>|#|%](?:\s*)$'),
re.compile(r'[\r\n]?[a-zA-Z]{1}[a-zA-Z0-9-]*\(.+\)#(?:\s*)$')
]
terminal_errors_re = [
re.compile(r"% ?Error"),
re.compile(r"^% \w+", re.M),
re.compile(r"% ?Bad secret"),
re.compile(r"invalid input", re.I),
re.compile(r"(?:incomplete|ambiguous) command", re.I),
re.compile(r"connection timed out", re.I),
re.compile(r"[^\r\n]+ not found", re.I),
re.compile(r"'[^']' +returned error code: ?\d+"),
re.compile(r"syntax error"),
re.compile(r"unknown command"),
re.compile(r"user not present")
]
def on_open_shell(self):
try:
self._exec_cli_command('terminal length 0')
except AnsibleConnectionFailure:
raise AnsibleConnectionFailure('unable to set terminal parameters')

@ -0,0 +1,46 @@
#
# (c) 2016 Red Hat Inc.
#
# 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/>.
#
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
import re
import json
from ansible.plugins.terminal import TerminalBase
from ansible.errors import AnsibleConnectionFailure
class TerminalModule(TerminalBase):
terminal_prompts_re = [
re.compile(r"[\r\n]?[\w+\-\.:\/\[\]]+(?:\([^\)]+\)){,3}(?:>|#) ?$"),
re.compile(r"\[\w+\@[\w\-\.]+(?: [^\]])\] ?[>#\$] ?$")
]
terminal_errors_re = [
re.compile(r"^\r\nError:"),
]
supports_multiplexing = False
def on_open_shell(self):
try:
self._exec_cli_command('environment no more')
except AnsibleConnectionFailure:
raise AnsibleConnectionFailure('unable to set terminal parameters')

@ -0,0 +1,47 @@
#
# (c) 2016 Red Hat Inc.
#
# 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/>.
#
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
import re
from ansible.plugins.terminal import TerminalBase
from ansible.errors import AnsibleConnectionFailure
class TerminalModule(TerminalBase):
terminal_prompts_re = [
re.compile(r"[\r\n]?[\w+\-\.:\/\[\]]+(?:\([^\)]+\)){,3}(?:>|#) ?$"),
re.compile(r"\@[\w\-\.]+:\S+?[>#\$] ?$")
]
terminal_errors_re = [
re.compile(r"\n\s*Invalid command:"),
re.compile(r"\nCommit failed"),
re.compile(r"\n\s+Set failed"),
]
def on_open_shell(self):
try:
self._exec_cli_command('set terminal length 0')
except AnsibleConnectionFailure:
raise AnsibleConnectionFailure('unable to set terminal parameters')
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