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November 18, 2019 09:43
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connection_plugins/packer.py for Ansible 2.9.0 and Packer 1.4.5
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| # Copyright (c) 2012, Michael DeHaan <[email protected]> | |
| # Copyright 2015 Abhijit Menon-Sen <[email protected]> | |
| # Copyright 2017 Toshio Kuratomi <[email protected]> | |
| # Copyright (c) 2017 Ansible Project | |
| # GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt) | |
| from __future__ import (absolute_import, division, print_function) | |
| __metaclass__ = type | |
| DOCUMENTATION = ''' | |
| connection: ssh | |
| short_description: connect via ssh client binary | |
| description: | |
| - This connection plugin allows ansible to communicate to the target machines via normal ssh command line. | |
| - Ansible does not expose a channel to allow communication between the user and the ssh process to accept | |
| a password manually to decrypt an ssh key when using this connection plugin (which is the default). The | |
| use of ``ssh-agent`` is highly recommended. | |
| author: ansible (@core) | |
| version_added: historical | |
| options: | |
| host: | |
| description: Hostname/ip to connect to. | |
| default: inventory_hostname | |
| vars: | |
| - name: ansible_host | |
| - name: ansible_ssh_host | |
| host_key_checking: | |
| description: Determines if ssh should check host keys | |
| type: boolean | |
| ini: | |
| - section: defaults | |
| key: 'host_key_checking' | |
| - section: ssh_connection | |
| key: 'host_key_checking' | |
| version_added: '2.5' | |
| env: | |
| - name: ANSIBLE_HOST_KEY_CHECKING | |
| - name: ANSIBLE_SSH_HOST_KEY_CHECKING | |
| version_added: '2.5' | |
| vars: | |
| - name: ansible_host_key_checking | |
| version_added: '2.5' | |
| - name: ansible_ssh_host_key_checking | |
| version_added: '2.5' | |
| password: | |
| description: Authentication password for the C(remote_user). Can be supplied as CLI option. | |
| vars: | |
| - name: ansible_password | |
| - name: ansible_ssh_pass | |
| ssh_args: | |
| description: Arguments to pass to all ssh cli tools | |
| default: '-C -o ControlMaster=auto -o ControlPersist=60s' | |
| ini: | |
| - section: 'ssh_connection' | |
| key: 'ssh_args' | |
| env: | |
| - name: ANSIBLE_SSH_ARGS | |
| vars: | |
| - name: ansible_ssh_args | |
| version_added: '2.7' | |
| ssh_common_args: | |
| description: Common extra args for all ssh CLI tools | |
| ini: | |
| - section: 'ssh_connection' | |
| key: 'ssh_common_args' | |
| version_added: '2.7' | |
| env: | |
| - name: ANSIBLE_SSH_COMMON_ARGS | |
| version_added: '2.7' | |
| vars: | |
| - name: ansible_ssh_common_args | |
| ssh_executable: | |
| default: ssh | |
| description: | |
| - This defines the location of the ssh binary. It defaults to ``ssh`` which will use the first ssh binary available in $PATH. | |
| - This option is usually not required, it might be useful when access to system ssh is restricted, | |
| or when using ssh wrappers to connect to remote hosts. | |
| env: [{name: ANSIBLE_SSH_EXECUTABLE}] | |
| ini: | |
| - {key: ssh_executable, section: ssh_connection} | |
| #const: ANSIBLE_SSH_EXECUTABLE | |
| version_added: "2.2" | |
| vars: | |
| - name: ansible_ssh_executable | |
| version_added: '2.7' | |
| sftp_executable: | |
| default: sftp | |
| description: | |
| - This defines the location of the sftp binary. It defaults to ``sftp`` which will use the first binary available in $PATH. | |
| env: [{name: ANSIBLE_SFTP_EXECUTABLE}] | |
| ini: | |
| - {key: sftp_executable, section: ssh_connection} | |
| version_added: "2.6" | |
| vars: | |
| - name: ansible_sftp_executable | |
| version_added: '2.7' | |
| scp_executable: | |
| default: scp | |
| description: | |
| - This defines the location of the scp binary. It defaults to `scp` which will use the first binary available in $PATH. | |
| env: [{name: ANSIBLE_SCP_EXECUTABLE}] | |
| ini: | |
| - {key: scp_executable, section: ssh_connection} | |
| version_added: "2.6" | |
| vars: | |
| - name: ansible_scp_executable | |
| version_added: '2.7' | |
| scp_extra_args: | |
| description: Extra exclusive to the ``scp`` CLI | |
| vars: | |
| - name: ansible_scp_extra_args | |
| env: | |
| - name: ANSIBLE_SCP_EXTRA_ARGS | |
| version_added: '2.7' | |
| ini: | |
| - key: scp_extra_args | |
| section: ssh_connection | |
| version_added: '2.7' | |
| sftp_extra_args: | |
| description: Extra exclusive to the ``sftp`` CLI | |
| vars: | |
| - name: ansible_sftp_extra_args | |
| env: | |
| - name: ANSIBLE_SFTP_EXTRA_ARGS | |
| version_added: '2.7' | |
| ini: | |
| - key: sftp_extra_args | |
| section: ssh_connection | |
| version_added: '2.7' | |
| ssh_extra_args: | |
| description: Extra exclusive to the 'ssh' CLI | |
| vars: | |
| - name: ansible_ssh_extra_args | |
| env: | |
| - name: ANSIBLE_SSH_EXTRA_ARGS | |
| version_added: '2.7' | |
| ini: | |
| - key: ssh_extra_args | |
| section: ssh_connection | |
| version_added: '2.7' | |
| retries: | |
| # constant: ANSIBLE_SSH_RETRIES | |
| description: Number of attempts to connect. | |
| default: 3 | |
| type: integer | |
| env: | |
| - name: ANSIBLE_SSH_RETRIES | |
| ini: | |
| - section: connection | |
| key: retries | |
| - section: ssh_connection | |
| key: retries | |
| vars: | |
| - name: ansible_ssh_retries | |
| version_added: '2.7' | |
| port: | |
| description: Remote port to connect to. | |
| type: int | |
| default: 22 | |
| ini: | |
| - section: defaults | |
| key: remote_port | |
| env: | |
| - name: ANSIBLE_REMOTE_PORT | |
| vars: | |
| - name: ansible_port | |
| - name: ansible_ssh_port | |
| remote_user: | |
| description: | |
| - User name with which to login to the remote server, normally set by the remote_user keyword. | |
| - If no user is supplied, Ansible will let the ssh client binary choose the user as it normally | |
| ini: | |
| - section: defaults | |
| key: remote_user | |
| env: | |
| - name: ANSIBLE_REMOTE_USER | |
| vars: | |
| - name: ansible_user | |
| - name: ansible_ssh_user | |
| pipelining: | |
| default: ANSIBLE_PIPELINING | |
| description: | |
| - Pipelining reduces the number of SSH operations required to execute a module on the remote server, | |
| by executing many Ansible modules without actual file transfer. | |
| - This can result in a very significant performance improvement when enabled. | |
| - However this conflicts with privilege escalation (become). | |
| For example, when using sudo operations you must first disable 'requiretty' in the sudoers file for the target hosts, | |
| which is why this feature is disabled by default. | |
| env: | |
| - name: ANSIBLE_PIPELINING | |
| #- name: ANSIBLE_SSH_PIPELINING | |
| ini: | |
| - section: defaults | |
| key: pipelining | |
| #- section: ssh_connection | |
| # key: pipelining | |
| type: boolean | |
| vars: | |
| - name: ansible_pipelining | |
| - name: ansible_ssh_pipelining | |
| private_key_file: | |
| description: | |
| - Path to private key file to use for authentication | |
| ini: | |
| - section: defaults | |
| key: private_key_file | |
| env: | |
| - name: ANSIBLE_PRIVATE_KEY_FILE | |
| vars: | |
| - name: ansible_private_key_file | |
| - name: ansible_ssh_private_key_file | |
| control_path: | |
| description: | |
| - This is the location to save ssh's ControlPath sockets, it uses ssh's variable substitution. | |
| - Since 2.3, if null, ansible will generate a unique hash. Use `%(directory)s` to indicate where to use the control dir path setting. | |
| env: | |
| - name: ANSIBLE_SSH_CONTROL_PATH | |
| ini: | |
| - key: control_path | |
| section: ssh_connection | |
| vars: | |
| - name: ansible_control_path | |
| version_added: '2.7' | |
| control_path_dir: | |
| default: ~/.ansible/cp | |
| description: | |
| - This sets the directory to use for ssh control path if the control path setting is null. | |
| - Also, provides the `%(directory)s` variable for the control path setting. | |
| env: | |
| - name: ANSIBLE_SSH_CONTROL_PATH_DIR | |
| ini: | |
| - section: ssh_connection | |
| key: control_path_dir | |
| vars: | |
| - name: ansible_control_path_dir | |
| version_added: '2.7' | |
| sftp_batch_mode: | |
| default: 'yes' | |
| description: 'TODO: write it' | |
| env: [{name: ANSIBLE_SFTP_BATCH_MODE}] | |
| ini: | |
| - {key: sftp_batch_mode, section: ssh_connection} | |
| type: bool | |
| vars: | |
| - name: ansible_sftp_batch_mode | |
| version_added: '2.7' | |
| scp_if_ssh: | |
| default: smart | |
| description: | |
| - "Prefered method to use when transfering files over ssh" | |
| - When set to smart, Ansible will try them until one succeeds or they all fail | |
| - If set to True, it will force 'scp', if False it will use 'sftp' | |
| env: [{name: ANSIBLE_SCP_IF_SSH}] | |
| ini: | |
| - {key: scp_if_ssh, section: ssh_connection} | |
| vars: | |
| - name: ansible_scp_if_ssh | |
| version_added: '2.7' | |
| use_tty: | |
| version_added: '2.5' | |
| default: 'yes' | |
| description: add -tt to ssh commands to force tty allocation | |
| env: [{name: ANSIBLE_SSH_USETTY}] | |
| ini: | |
| - {key: usetty, section: ssh_connection} | |
| type: bool | |
| vars: | |
| - name: ansible_ssh_use_tty | |
| version_added: '2.7' | |
| ''' | |
| import errno | |
| import fcntl | |
| import hashlib | |
| import os | |
| import pty | |
| import subprocess | |
| import time | |
| from functools import wraps | |
| from ansible import constants as C | |
| from ansible.errors import ( | |
| AnsibleAuthenticationFailure, | |
| AnsibleConnectionFailure, | |
| AnsibleError, | |
| AnsibleFileNotFound, | |
| ) | |
| from ansible.errors import AnsibleOptionsError | |
| from ansible.compat import selectors | |
| from ansible.module_utils.six import PY3, text_type, binary_type | |
| from ansible.module_utils.six.moves import shlex_quote | |
| from ansible.module_utils._text import to_bytes, to_native, to_text | |
| from ansible.module_utils.parsing.convert_bool import BOOLEANS, boolean | |
| from ansible.plugins.connection import ConnectionBase, BUFSIZE | |
| from ansible.utils.path import unfrackpath, makedirs_safe | |
| try: | |
| from __main__ import display | |
| except ImportError: | |
| from ansible.utils.display import Display | |
| display = Display() | |
| b_NOT_SSH_ERRORS = (b'Traceback (most recent call last):', # Python-2.6 when there's an exception | |
| # while invoking a script via -m | |
| b'PHP Parse error:', # Php always returns error 255 | |
| ) | |
| SSHPASS_AVAILABLE = None | |
| class AnsibleControlPersistBrokenPipeError(AnsibleError): | |
| ''' ControlPersist broken pipe ''' | |
| pass | |
| def _handle_error(remaining_retries, command, return_tuple, no_log, host, display=display): | |
| # sshpass errors | |
| if command == b'sshpass': | |
| # Error 5 is invalid/incorrect password. Raise an exception to prevent retries from locking the account. | |
| if return_tuple[0] == 5: | |
| msg = 'Invalid/incorrect username/password. Skipping remaining {0} retries to prevent account lockout:'.format(remaining_retries) | |
| if remaining_retries <= 0: | |
| msg = 'Invalid/incorrect password:' | |
| if no_log: | |
| msg = '{0} <error censored due to no log>'.format(msg) | |
| else: | |
| msg = '{0} {1}'.format(msg, to_native(return_tuple[2].rstrip())) | |
| raise AnsibleAuthenticationFailure(msg) | |
| # sshpass returns codes are 1-6. We handle 5 previously, so this catches other scenarios. | |
| # No exception is raised, so the connection is retried. | |
| elif return_tuple[0] in [1, 2, 3, 4, 6]: | |
| msg = 'sshpass error:' | |
| if no_log: | |
| msg = '{0} <error censored due to no log>'.format(msg) | |
| else: | |
| msg = '{0} {1}'.format(msg, to_native(return_tuple[2].rstrip())) | |
| if return_tuple[0] == 255: | |
| SSH_ERROR = True | |
| for signature in b_NOT_SSH_ERRORS: | |
| if signature in return_tuple[1]: | |
| SSH_ERROR = False | |
| break | |
| if SSH_ERROR: | |
| msg = "Failed to connect to the host via ssh:" | |
| if no_log: | |
| msg = '{0} <error censored due to no log>'.format(msg) | |
| else: | |
| msg = '{0} {1}'.format(msg, to_native(return_tuple[2]).rstrip()) | |
| raise AnsibleConnectionFailure(msg) | |
| # For other errors, no execption is raised so the connection is retried and we only log the messages | |
| if 1 <= return_tuple[0] <= 254: | |
| msg = "Failed to connect to the host via ssh:" | |
| if no_log: | |
| msg = '{0} <error censored due to no log>'.format(msg) | |
| else: | |
| msg = '{0} {1}'.format(msg, to_native(return_tuple[2]).rstrip()) | |
| display.vvv(msg, host=host) | |
| def _ssh_retry(func): | |
| """ | |
| Decorator to retry ssh/scp/sftp in the case of a connection failure | |
| Will retry if: | |
| * an exception is caught | |
| * ssh returns 255 | |
| Will not retry if | |
| * sshpass returns 5 (invalid password, to prevent account lockouts) | |
| * remaining_tries is < 2 | |
| * retries limit reached | |
| """ | |
| @wraps(func) | |
| def wrapped(self, *args, **kwargs): | |
| remaining_tries = int(C.ANSIBLE_SSH_RETRIES) + 1 | |
| cmd_summary = "%s..." % args[0] | |
| for attempt in range(remaining_tries): | |
| cmd = args[0] | |
| if attempt != 0 and self._play_context.password and isinstance(cmd, list): | |
| # If this is a retry, the fd/pipe for sshpass is closed, and we need a new one | |
| self.sshpass_pipe = os.pipe() | |
| cmd[1] = b'-d' + to_bytes(self.sshpass_pipe[0], nonstring='simplerepr', errors='surrogate_or_strict') | |
| try: | |
| try: | |
| return_tuple = func(self, *args, **kwargs) | |
| if self._play_context.no_log: | |
| display.vvv('rc=%s, stdout and stderr censored due to no log' % return_tuple[0], host=self.host) | |
| else: | |
| display.vvv(return_tuple, host=self.host) | |
| # 0 = success | |
| # 1-254 = remote command return code | |
| # 255 could be a failure from the ssh command itself | |
| except (AnsibleControlPersistBrokenPipeError): | |
| # Retry one more time because of the ControlPersist broken pipe (see #16731) | |
| cmd = args[0] | |
| if self._play_context.password and isinstance(cmd, list): | |
| # This is a retry, so the fd/pipe for sshpass is closed, and we need a new one | |
| self.sshpass_pipe = os.pipe() | |
| cmd[1] = b'-d' + to_bytes(self.sshpass_pipe[0], nonstring='simplerepr', errors='surrogate_or_strict') | |
| display.vvv(u"RETRYING BECAUSE OF CONTROLPERSIST BROKEN PIPE") | |
| return_tuple = func(self, *args, **kwargs) | |
| remaining_retries = remaining_tries - attempt - 1 | |
| _handle_error(remaining_retries, cmd[0], return_tuple, self._play_context.no_log, self.host) | |
| break | |
| # 5 = Invalid/incorrect password from sshpass | |
| except AnsibleAuthenticationFailure as e: | |
| # Raising this exception, which is subclassed from AnsibleConnectionFailure, prevents further retries | |
| raise | |
| except (AnsibleConnectionFailure, Exception) as e: | |
| if attempt == remaining_tries - 1: | |
| raise | |
| else: | |
| pause = 2 ** attempt - 1 | |
| if pause > 30: | |
| pause = 30 | |
| if isinstance(e, AnsibleConnectionFailure): | |
| msg = "ssh_retry: attempt: %d, ssh return code is 255. cmd (%s), pausing for %d seconds" % (attempt + 1, cmd_summary, pause) | |
| else: | |
| msg = "ssh_retry: attempt: %d, caught exception(%s) from cmd (%s), pausing for %d seconds" % (attempt + 1, e, cmd_summary, pause) | |
| display.vv(msg, host=self.host) | |
| time.sleep(pause) | |
| continue | |
| return return_tuple | |
| return wrapped | |
| class Connection(ConnectionBase): | |
| ''' ssh based connections ''' | |
| transport = 'packer' | |
| has_pipelining = True | |
| become_methods = [] | |
| allow_executable = False | |
| module_implementation_preferences = ('.ps1', '') | |
| def __init__(self, *args, **kwargs): | |
| super(Connection, self).__init__(*args, **kwargs) | |
| self.host = self._play_context.remote_addr | |
| self.port = self._play_context.port | |
| self.user = self._play_context.remote_user | |
| self.control_path = C.ANSIBLE_SSH_CONTROL_PATH | |
| self.control_path_dir = C.ANSIBLE_SSH_CONTROL_PATH_DIR | |
| # The connection is created by running ssh/scp/sftp from the exec_command, | |
| # put_file, and fetch_file methods, so we don't need to do any connection | |
| # management here. | |
| def _connect(self): | |
| return self | |
| @staticmethod | |
| def _create_control_path(host, port, user, connection=None, pid=None): | |
| '''Make a hash for the controlpath based on con attributes''' | |
| pstring = '%s-%s-%s' % (host, port, user) | |
| if connection: | |
| pstring += '-%s' % connection | |
| if pid: | |
| pstring += '-%s' % to_text(pid) | |
| m = hashlib.sha1() | |
| m.update(to_bytes(pstring)) | |
| digest = m.hexdigest() | |
| cpath = '%(directory)s/' + digest[:10] | |
| return cpath | |
| @staticmethod | |
| def _sshpass_available(): | |
| global SSHPASS_AVAILABLE | |
| # We test once if sshpass is available, and remember the result. It | |
| # would be nice to use distutils.spawn.find_executable for this, but | |
| # distutils isn't always available; shutils.which() is Python3-only. | |
| if SSHPASS_AVAILABLE is None: | |
| try: | |
| p = subprocess.Popen(["sshpass"], stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE) | |
| p.communicate() | |
| SSHPASS_AVAILABLE = True | |
| except OSError: | |
| SSHPASS_AVAILABLE = False | |
| return SSHPASS_AVAILABLE | |
| @staticmethod | |
| def _persistence_controls(b_command): | |
| ''' | |
| Takes a command array and scans it for ControlPersist and ControlPath | |
| settings and returns two booleans indicating whether either was found. | |
| This could be smarter, e.g. returning false if ControlPersist is 'no', | |
| but for now we do it simple way. | |
| ''' | |
| controlpersist = False | |
| controlpath = False | |
| for b_arg in (a.lower() for a in b_command): | |
| if b'controlpersist' in b_arg: | |
| controlpersist = True | |
| elif b'controlpath' in b_arg: | |
| controlpath = True | |
| return controlpersist, controlpath | |
| def _add_args(self, b_command, b_args, explanation): | |
| """ | |
| Adds arguments to the ssh command and displays a caller-supplied explanation of why. | |
| :arg b_command: A list containing the command to add the new arguments to. | |
| This list will be modified by this method. | |
| :arg b_args: An iterable of new arguments to add. This iterable is used | |
| more than once so it must be persistent (ie: a list is okay but a | |
| StringIO would not) | |
| :arg explanation: A text string containing explaining why the arguments | |
| were added. It will be displayed with a high enough verbosity. | |
| .. note:: This function does its work via side-effect. The b_command list has the new arguments appended. | |
| """ | |
| display.vvvvv(u'SSH: %s: (%s)' % (explanation, ')('.join(to_text(a) for a in b_args)), host=self._play_context.remote_addr) | |
| b_command += b_args | |
| def _build_command(self, binary, *other_args): | |
| ''' | |
| Takes a binary (ssh, scp, sftp) and optional extra arguments and returns | |
| a command line as an array that can be passed to subprocess.Popen. | |
| ''' | |
| b_command = [] | |
| # | |
| # First, the command to invoke | |
| # | |
| # If we want to use password authentication, we have to set up a pipe to | |
| # write the password to sshpass. | |
| if self._play_context.password: | |
| if not self._sshpass_available(): | |
| raise AnsibleError("to use the 'ssh' connection type with passwords, you must install the sshpass program") | |
| self.sshpass_pipe = os.pipe() | |
| b_command += [b'sshpass', b'-d' + to_bytes(self.sshpass_pipe[0], nonstring='simplerepr', errors='surrogate_or_strict')] | |
| if binary == 'ssh': | |
| b_command += [to_bytes(self._play_context.ssh_executable, errors='surrogate_or_strict')] | |
| else: | |
| b_command += [to_bytes(binary, errors='surrogate_or_strict')] | |
| # | |
| # Next, additional arguments based on the configuration. | |
| # | |
| # sftp batch mode allows us to correctly catch failed transfers, but can | |
| # be disabled if the client side doesn't support the option. However, | |
| # sftp batch mode does not prompt for passwords so it must be disabled | |
| # if not using controlpersist and using sshpass | |
| if binary == 'sftp' and C.DEFAULT_SFTP_BATCH_MODE: | |
| if self._play_context.password: | |
| b_args = [b'-o', b'BatchMode=no'] | |
| self._add_args(b_command, b_args, u'disable batch mode for sshpass') | |
| b_command += [b'-b', b'-'] | |
| if self._play_context.verbosity > 3: | |
| b_command.append(b'-vvv') | |
| # | |
| # Next, we add [ssh_connection]ssh_args from ansible.cfg. | |
| # | |
| if self._play_context.ssh_args: | |
| b_args = [to_bytes(a, errors='surrogate_or_strict') for a in | |
| self._split_ssh_args(self._play_context.ssh_args)] | |
| self._add_args(b_command, b_args, u"ansible.cfg set ssh_args") | |
| # Now we add various arguments controlled by configuration file settings | |
| # (e.g. host_key_checking) or inventory variables (ansible_ssh_port) or | |
| # a combination thereof. | |
| if not C.HOST_KEY_CHECKING: | |
| b_args = (b"-o", b"StrictHostKeyChecking=no") | |
| self._add_args(b_command, b_args, u"ANSIBLE_HOST_KEY_CHECKING/host_key_checking disabled") | |
| if self._play_context.port is not None: | |
| b_args = (b"-o", b"Port=" + to_bytes(self._play_context.port, nonstring='simplerepr', errors='surrogate_or_strict')) | |
| self._add_args(b_command, b_args, u"ANSIBLE_REMOTE_PORT/remote_port/ansible_port set") | |
| key = self._play_context.private_key_file | |
| if key: | |
| b_args = (b"-o", b'IdentityFile="' + to_bytes(os.path.expanduser(key), errors='surrogate_or_strict') + b'"') | |
| self._add_args(b_command, b_args, u"ANSIBLE_PRIVATE_KEY_FILE/private_key_file/ansible_ssh_private_key_file set") | |
| if not self._play_context.password: | |
| self._add_args( | |
| b_command, ( | |
| b"-o", b"KbdInteractiveAuthentication=no", | |
| b"-o", b"PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey", | |
| b"-o", b"PasswordAuthentication=no" | |
| ), | |
| u"ansible_password/ansible_ssh_pass not set" | |
| ) | |
| user = self._play_context.remote_user | |
| if user: | |
| self._add_args( | |
| b_command, | |
| (b"-o", b"User=" + to_bytes(self._play_context.remote_user, errors='surrogate_or_strict')), | |
| u"ANSIBLE_REMOTE_USER/remote_user/ansible_user/user/-u set" | |
| ) | |
| self._add_args( | |
| b_command, | |
| (b"-o", b"ConnectTimeout=" + to_bytes(self._play_context.timeout, errors='surrogate_or_strict', nonstring='simplerepr')), | |
| u"ANSIBLE_TIMEOUT/timeout set" | |
| ) | |
| # Add in any common or binary-specific arguments from the PlayContext | |
| # (i.e. inventory or task settings or overrides on the command line). | |
| for opt in (u'ssh_common_args', u'{0}_extra_args'.format(binary)): | |
| attr = getattr(self._play_context, opt, None) | |
| if attr is not None: | |
| b_args = [to_bytes(a, errors='surrogate_or_strict') for a in self._split_ssh_args(attr)] | |
| self._add_args(b_command, b_args, u"PlayContext set %s" % opt) | |
| # Check if ControlPersist is enabled and add a ControlPath if one hasn't | |
| # already been set. | |
| controlpersist, controlpath = self._persistence_controls(b_command) | |
| if controlpersist: | |
| self._persistent = True | |
| if not controlpath: | |
| cpdir = unfrackpath(self.control_path_dir) | |
| b_cpdir = to_bytes(cpdir, errors='surrogate_or_strict') | |
| # The directory must exist and be writable. | |
| makedirs_safe(b_cpdir, 0o700) | |
| if not os.access(b_cpdir, os.W_OK): | |
| raise AnsibleError("Cannot write to ControlPath %s" % to_native(cpdir)) | |
| if not self.control_path: | |
| self.control_path = self._create_control_path( | |
| self.host, | |
| self.port, | |
| self.user | |
| ) | |
| b_args = (b"-o", b"ControlPath=" + to_bytes(self.control_path % dict(directory=cpdir), errors='surrogate_or_strict')) | |
| self._add_args(b_command, b_args, u"found only ControlPersist; added ControlPath") | |
| # Finally, we add any caller-supplied extras. | |
| if other_args: | |
| b_command += [to_bytes(a) for a in other_args] | |
| return b_command | |
| def _send_initial_data(self, fh, in_data, ssh_process): | |
| ''' | |
| Writes initial data to the stdin filehandle of the subprocess and closes | |
| it. (The handle must be closed; otherwise, for example, "sftp -b -" will | |
| just hang forever waiting for more commands.) | |
| ''' | |
| display.debug('Sending initial data') | |
| try: | |
| fh.write(to_bytes(in_data)) | |
| fh.close() | |
| except (OSError, IOError): | |
| # The ssh connection may have already terminated at this point, with a more useful error | |
| # Only raise AnsibleConnectionFailure if the ssh process is still alive | |
| time.sleep(0.001) | |
| ssh_process.poll() | |
| if getattr(ssh_process, 'returncode', None) is None: | |
| raise AnsibleConnectionFailure( | |
| 'SSH Error: data could not be sent to remote host "%s". Make sure this host can be reached ' | |
| 'over ssh' % self.host | |
| ) | |
| display.debug('Sent initial data (%d bytes)' % len(in_data)) | |
| # Used by _run() to kill processes on failures | |
| @staticmethod | |
| def _terminate_process(p): | |
| """ Terminate a process, ignoring errors """ | |
| try: | |
| p.terminate() | |
| except (OSError, IOError): | |
| pass | |
| # This is separate from _run() because we need to do the same thing for stdout | |
| # and stderr. | |
| def _examine_output(self, source, state, b_chunk, sudoable): | |
| ''' | |
| Takes a string, extracts complete lines from it, tests to see if they | |
| are a prompt, error message, etc., and sets appropriate flags in self. | |
| Prompt and success lines are removed. | |
| Returns the processed (i.e. possibly-edited) output and the unprocessed | |
| remainder (to be processed with the next chunk) as strings. | |
| ''' | |
| output = [] | |
| for b_line in b_chunk.splitlines(True): | |
| display_line = to_text(b_line).rstrip('\r\n') | |
| suppress_output = False | |
| # display.debug("Examining line (source=%s, state=%s): '%s'" % (source, state, display_line)) | |
| if self._play_context.prompt and self.check_password_prompt(b_line): | |
| display.debug("become_prompt: (source=%s, state=%s): '%s'" % (source, state, display_line)) | |
| self._flags['become_prompt'] = True | |
| suppress_output = True | |
| elif self._play_context.success_key and self.check_become_success(b_line): | |
| display.debug("become_success: (source=%s, state=%s): '%s'" % (source, state, display_line)) | |
| self._flags['become_success'] = True | |
| suppress_output = True | |
| elif sudoable and self.check_incorrect_password(b_line): | |
| display.debug("become_error: (source=%s, state=%s): '%s'" % (source, state, display_line)) | |
| self._flags['become_error'] = True | |
| elif sudoable and self.check_missing_password(b_line): | |
| display.debug("become_nopasswd_error: (source=%s, state=%s): '%s'" % (source, state, display_line)) | |
| self._flags['become_nopasswd_error'] = True | |
| if not suppress_output: | |
| output.append(b_line) | |
| # The chunk we read was most likely a series of complete lines, but just | |
| # in case the last line was incomplete (and not a prompt, which we would | |
| # have removed from the output), we retain it to be processed with the | |
| # next chunk. | |
| remainder = b'' | |
| if output and not output[-1].endswith(b'\n'): | |
| remainder = output[-1] | |
| output = output[:-1] | |
| return b''.join(output), remainder | |
| def _bare_run(self, cmd, in_data, sudoable=True, checkrc=True): | |
| ''' | |
| Starts the command and communicates with it until it ends. | |
| ''' | |
| display_cmd = list(map(shlex_quote, map(to_text, cmd))) | |
| display.vvv(u'SSH: EXEC {0}'.format(u' '.join(display_cmd)), host=self.host) | |
| # Start the given command. If we don't need to pipeline data, we can try | |
| # to use a pseudo-tty (ssh will have been invoked with -tt). If we are | |
| # pipelining data, or can't create a pty, we fall back to using plain | |
| # old pipes. | |
| p = None | |
| if isinstance(cmd, (text_type, binary_type)): | |
| cmd = to_bytes(cmd) | |
| else: | |
| cmd = list(map(to_bytes, cmd)) | |
| if not in_data: | |
| try: | |
| # Make sure stdin is a proper pty to avoid tcgetattr errors | |
| master, slave = pty.openpty() | |
| if PY3 and self._play_context.password: | |
| # pylint: disable=unexpected-keyword-arg | |
| p = subprocess.Popen(cmd, stdin=slave, stdout=subprocess.PIPE, stderr=subprocess.PIPE, pass_fds=self.sshpass_pipe) | |
| else: | |
| p = subprocess.Popen(cmd, stdin=slave, stdout=subprocess.PIPE, stderr=subprocess.PIPE) | |
| stdin = os.fdopen(master, 'wb', 0) | |
| os.close(slave) | |
| except (OSError, IOError): | |
| p = None | |
| if not p: | |
| if PY3 and self._play_context.password: | |
| # pylint: disable=unexpected-keyword-arg | |
| p = subprocess.Popen(cmd, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE, pass_fds=self.sshpass_pipe) | |
| else: | |
| p = subprocess.Popen(cmd, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE) | |
| stdin = p.stdin | |
| # If we are using SSH password authentication, write the password into | |
| # the pipe we opened in _build_command. | |
| if self._play_context.password: | |
| os.close(self.sshpass_pipe[0]) | |
| try: | |
| os.write(self.sshpass_pipe[1], to_bytes(self._play_context.password) + b'\n') | |
| except OSError as e: | |
| # Ignore broken pipe errors if the sshpass process has exited. | |
| if e.errno != errno.EPIPE or p.poll() is None: | |
| raise | |
| os.close(self.sshpass_pipe[1]) | |
| # | |
| # SSH state machine | |
| # | |
| # Now we read and accumulate output from the running process until it | |
| # exits. Depending on the circumstances, we may also need to write an | |
| # escalation password and/or pipelined input to the process. | |
| states = [ | |
| 'awaiting_prompt', 'awaiting_escalation', 'ready_to_send', 'awaiting_exit' | |
| ] | |
| # Are we requesting privilege escalation? Right now, we may be invoked | |
| # to execute sftp/scp with sudoable=True, but we can request escalation | |
| # only when using ssh. Otherwise we can send initial data straightaway. | |
| state = states.index('ready_to_send') | |
| if to_bytes(self.get_option('ssh_executable')) in cmd and sudoable: | |
| if self._play_context.prompt: | |
| # We're requesting escalation with a password, so we have to | |
| # wait for a password prompt. | |
| state = states.index('awaiting_prompt') | |
| display.debug(u'Initial state: %s: %s' % (states[state], self._play_context.prompt)) | |
| elif self._play_context.become and self._play_context.success_key: | |
| # We're requesting escalation without a password, so we have to | |
| # detect success/failure before sending any initial data. | |
| state = states.index('awaiting_escalation') | |
| display.debug(u'Initial state: %s: %s' % (states[state], self._play_context.success_key)) | |
| # We store accumulated stdout and stderr output from the process here, | |
| # but strip any privilege escalation prompt/confirmation lines first. | |
| # Output is accumulated into tmp_*, complete lines are extracted into | |
| # an array, then checked and removed or copied to stdout or stderr. We | |
| # set any flags based on examining the output in self._flags. | |
| b_stdout = b_stderr = b'' | |
| b_tmp_stdout = b_tmp_stderr = b'' | |
| self._flags = dict( | |
| become_prompt=False, become_success=False, | |
| become_error=False, become_nopasswd_error=False | |
| ) | |
| # select timeout should be longer than the connect timeout, otherwise | |
| # they will race each other when we can't connect, and the connect | |
| # timeout usually fails | |
| timeout = 2 + self._play_context.timeout | |
| for fd in (p.stdout, p.stderr): | |
| fcntl.fcntl(fd, fcntl.F_SETFL, fcntl.fcntl(fd, fcntl.F_GETFL) | os.O_NONBLOCK) | |
| # TODO: bcoca would like to use SelectSelector() when open | |
| # filehandles is low, then switch to more efficient ones when higher. | |
| # select is faster when filehandles is low. | |
| selector = selectors.DefaultSelector() | |
| selector.register(p.stdout, selectors.EVENT_READ) | |
| selector.register(p.stderr, selectors.EVENT_READ) | |
| # If we can send initial data without waiting for anything, we do so | |
| # before we start polling | |
| if states[state] == 'ready_to_send' and in_data: | |
| self._send_initial_data(stdin, in_data, p) | |
| state += 1 | |
| try: | |
| while True: | |
| poll = p.poll() | |
| events = selector.select(timeout) | |
| # We pay attention to timeouts only while negotiating a prompt. | |
| if not events: | |
| # We timed out | |
| if state <= states.index('awaiting_escalation'): | |
| # If the process has already exited, then it's not really a | |
| # timeout; we'll let the normal error handling deal with it. | |
| if poll is not None: | |
| break | |
| self._terminate_process(p) | |
| raise AnsibleError('Timeout (%ds) waiting for privilege escalation prompt: %s' % (timeout, to_native(b_stdout))) | |
| # Read whatever output is available on stdout and stderr, and stop | |
| # listening to the pipe if it's been closed. | |
| for key, event in events: | |
| if key.fileobj == p.stdout: | |
| b_chunk = p.stdout.read() | |
| if b_chunk == b'': | |
| # stdout has been closed, stop watching it | |
| selector.unregister(p.stdout) | |
| # When ssh has ControlMaster (+ControlPath/Persist) enabled, the | |
| # first connection goes into the background and we never see EOF | |
| # on stderr. If we see EOF on stdout, lower the select timeout | |
| # to reduce the time wasted selecting on stderr if we observe | |
| # that the process has not yet existed after this EOF. Otherwise | |
| # we may spend a long timeout period waiting for an EOF that is | |
| # not going to arrive until the persisted connection closes. | |
| timeout = 1 | |
| b_tmp_stdout += b_chunk | |
| display.debug("stdout chunk (state=%s):\n>>>%s<<<\n" % (state, to_text(b_chunk))) | |
| elif key.fileobj == p.stderr: | |
| b_chunk = p.stderr.read() | |
| if b_chunk == b'': | |
| # stderr has been closed, stop watching it | |
| selector.unregister(p.stderr) | |
| b_tmp_stderr += b_chunk | |
| display.debug("stderr chunk (state=%s):\n>>>%s<<<\n" % (state, to_text(b_chunk))) | |
| # We examine the output line-by-line until we have negotiated any | |
| # privilege escalation prompt and subsequent success/error message. | |
| # Afterwards, we can accumulate output without looking at it. | |
| if state < states.index('ready_to_send'): | |
| if b_tmp_stdout: | |
| b_output, b_unprocessed = self._examine_output('stdout', states[state], b_tmp_stdout, sudoable) | |
| b_stdout += b_output | |
| b_tmp_stdout = b_unprocessed | |
| if b_tmp_stderr: | |
| b_output, b_unprocessed = self._examine_output('stderr', states[state], b_tmp_stderr, sudoable) | |
| b_stderr += b_output | |
| b_tmp_stderr = b_unprocessed | |
| else: | |
| b_stdout += b_tmp_stdout | |
| b_stderr += b_tmp_stderr | |
| b_tmp_stdout = b_tmp_stderr = b'' | |
| # If we see a privilege escalation prompt, we send the password. | |
| # (If we're expecting a prompt but the escalation succeeds, we | |
| # didn't need the password and can carry on regardless.) | |
| if states[state] == 'awaiting_prompt': | |
| if self._flags['become_prompt']: | |
| display.debug('Sending become_pass in response to prompt') | |
| stdin.write(to_bytes(self._play_context.become_pass) + b'\n') | |
| # On python3 stdin is a BufferedWriter, and we don't have a guarantee | |
| # that the write will happen without a flush | |
| stdin.flush() | |
| self._flags['become_prompt'] = False | |
| state += 1 | |
| elif self._flags['become_success']: | |
| state += 1 | |
| # We've requested escalation (with or without a password), now we | |
| # wait for an error message or a successful escalation. | |
| if states[state] == 'awaiting_escalation': | |
| if self._flags['become_success']: | |
| display.vvv('Escalation succeeded') | |
| self._flags['become_success'] = False | |
| state += 1 | |
| elif self._flags['become_error']: | |
| display.vvv('Escalation failed') | |
| self._terminate_process(p) | |
| self._flags['become_error'] = False | |
| raise AnsibleError('Incorrect %s password' % self._play_context.become_method) | |
| elif self._flags['become_nopasswd_error']: | |
| display.vvv('Escalation requires password') | |
| self._terminate_process(p) | |
| self._flags['become_nopasswd_error'] = False | |
| raise AnsibleError('Missing %s password' % self._play_context.become_method) | |
| elif self._flags['become_prompt']: | |
| # This shouldn't happen, because we should see the "Sorry, | |
| # try again" message first. | |
| display.vvv('Escalation prompt repeated') | |
| self._terminate_process(p) | |
| self._flags['become_prompt'] = False | |
| raise AnsibleError('Incorrect %s password' % self._play_context.become_method) | |
| # Once we're sure that the privilege escalation prompt, if any, has | |
| # been dealt with, we can send any initial data and start waiting | |
| # for output. | |
| if states[state] == 'ready_to_send': | |
| if in_data: | |
| self._send_initial_data(stdin, in_data, p) | |
| state += 1 | |
| # Now we're awaiting_exit: has the child process exited? If it has, | |
| # and we've read all available output from it, we're done. | |
| if poll is not None: | |
| if not selector.get_map() or not events: | |
| break | |
| # We should not see further writes to the stdout/stderr file | |
| # descriptors after the process has closed, set the select | |
| # timeout to gather any last writes we may have missed. | |
| timeout = 0 | |
| continue | |
| # If the process has not yet exited, but we've already read EOF from | |
| # its stdout and stderr (and thus no longer watching any file | |
| # descriptors), we can just wait for it to exit. | |
| elif not selector.get_map(): | |
| p.wait() | |
| break | |
| # Otherwise there may still be outstanding data to read. | |
| finally: | |
| selector.close() | |
| # close stdin after process is terminated and stdout/stderr are read | |
| # completely (see also issue #848) | |
| stdin.close() | |
| if C.HOST_KEY_CHECKING: | |
| if cmd[0] == b"sshpass" and p.returncode == 6: | |
| raise AnsibleError('Using a SSH password instead of a key is not possible because Host Key checking is enabled and sshpass does not support ' | |
| 'this. Please add this host\'s fingerprint to your known_hosts file to manage this host.') | |
| controlpersisterror = b'Bad configuration option: ControlPersist' in b_stderr or b'unknown configuration option: ControlPersist' in b_stderr | |
| if p.returncode != 0 and controlpersisterror: | |
| raise AnsibleError('using -c ssh on certain older ssh versions may not support ControlPersist, set ANSIBLE_SSH_ARGS="" ' | |
| '(or ssh_args in [ssh_connection] section of the config file) before running again') | |
| # If we find a broken pipe because of ControlPersist timeout expiring (see #16731), | |
| # we raise a special exception so that we can retry a connection. | |
| controlpersist_broken_pipe = b'mux_client_hello_exchange: write packet: Broken pipe' in b_stderr | |
| if p.returncode == 255 and controlpersist_broken_pipe: | |
| raise AnsibleControlPersistBrokenPipeError('SSH Error: data could not be sent because of ControlPersist broken pipe.') | |
| if p.returncode == 255 and in_data and checkrc: | |
| raise AnsibleConnectionFailure('SSH Error: data could not be sent to remote host "%s". Make sure this host can be reached over ssh' % self.host) | |
| return (p.returncode, b_stdout, b_stderr) | |
| @_ssh_retry | |
| def _run(self, cmd, in_data, sudoable=True, checkrc=True): | |
| """Wrapper around _bare_run that retries the connection | |
| """ | |
| return self._bare_run(cmd, in_data, sudoable=sudoable, checkrc=checkrc) | |
| @_ssh_retry | |
| def _file_transport_command(self, in_path, out_path, sftp_action): | |
| # scp and sftp require square brackets for IPv6 addresses, but | |
| # accept them for hostnames and IPv4 addresses too. | |
| host = '[%s]' % self.host | |
| # Transfer methods to try | |
| methods = [] | |
| # Use the transfer_method option if set, otherwise use scp_if_ssh | |
| ssh_transfer_method = self._play_context.ssh_transfer_method | |
| if ssh_transfer_method is not None: | |
| if not (ssh_transfer_method in ('smart', 'sftp', 'scp', 'piped')): | |
| raise AnsibleOptionsError('transfer_method needs to be one of [smart|sftp|scp|piped]') | |
| if ssh_transfer_method == 'smart': | |
| methods = ['sftp', 'scp', 'piped'] | |
| else: | |
| methods = [ssh_transfer_method] | |
| else: | |
| # since this can be a non-bool now, we need to handle it correctly | |
| scp_if_ssh = C.DEFAULT_SCP_IF_SSH | |
| if not isinstance(scp_if_ssh, bool): | |
| scp_if_ssh = scp_if_ssh.lower() | |
| if scp_if_ssh in BOOLEANS: | |
| scp_if_ssh = boolean(scp_if_ssh, strict=False) | |
| elif scp_if_ssh != 'smart': | |
| raise AnsibleOptionsError('scp_if_ssh needs to be one of [smart|True|False]') | |
| if scp_if_ssh == 'smart': | |
| methods = ['sftp', 'scp', 'piped'] | |
| elif scp_if_ssh is True: | |
| methods = ['scp'] | |
| else: | |
| methods = ['sftp'] | |
| for method in methods: | |
| returncode = stdout = stderr = None | |
| if method == 'sftp': | |
| cmd = self._build_command(self.get_option('sftp_executable'), to_bytes(host)) | |
| in_data = u"{0} {1} {2}\n".format(sftp_action, shlex_quote(in_path), shlex_quote(out_path)) | |
| in_data = to_bytes(in_data, nonstring='passthru') | |
| (returncode, stdout, stderr) = self._bare_run(cmd, in_data, checkrc=False) | |
| elif method == 'scp': | |
| scp = self.get_option('scp_executable') | |
| if sftp_action == 'get': | |
| cmd = self._build_command(scp, u'{0}:{1}'.format(host, shlex_quote(in_path)), out_path) | |
| else: | |
| cmd = self._build_command(scp, in_path, u'{0}:{1}'.format(host, shlex_quote(out_path))) | |
| in_data = None | |
| (returncode, stdout, stderr) = self._bare_run(cmd, in_data, checkrc=False) | |
| elif method == 'piped': | |
| if sftp_action == 'get': | |
| # we pass sudoable=False to disable pty allocation, which | |
| # would end up mixing stdout/stderr and screwing with newlines | |
| (returncode, stdout, stderr) = self.exec_command('dd if=%s bs=%s' % (in_path, BUFSIZE), sudoable=False) | |
| with open(to_bytes(out_path, errors='surrogate_or_strict'), 'wb+') as out_file: | |
| out_file.write(stdout) | |
| else: | |
| with open(to_bytes(in_path, errors='surrogate_or_strict'), 'rb') as f: | |
| in_data = to_bytes(f.read(), nonstring='passthru') | |
| if not in_data: | |
| count = ' count=0' | |
| else: | |
| count = '' | |
| (returncode, stdout, stderr) = self.exec_command('dd of=%s bs=%s%s' % (out_path, BUFSIZE, count), in_data=in_data, sudoable=False) | |
| # Check the return code and rollover to next method if failed | |
| if returncode == 0: | |
| return (returncode, stdout, stderr) | |
| else: | |
| # If not in smart mode, the data will be printed by the raise below | |
| if len(methods) > 1: | |
| display.warning(msg='%s transfer mechanism failed on %s. Use ANSIBLE_DEBUG=1 to see detailed information' % (method, host)) | |
| display.debug(msg='%s' % to_native(stdout)) | |
| display.debug(msg='%s' % to_native(stderr)) | |
| if returncode == 255: | |
| raise AnsibleConnectionFailure("Failed to connect to the host via %s: %s" % (method, to_native(stderr))) | |
| else: | |
| raise AnsibleError("failed to transfer file to %s %s:\n%s\n%s" % | |
| (to_native(in_path), to_native(out_path), to_native(stdout), to_native(stderr))) | |
| # | |
| # Main public methods | |
| # | |
| def exec_command(self, cmd, in_data=None, sudoable=True): | |
| ''' run a command on the remote host ''' | |
| super(Connection, self).exec_command(cmd, in_data=in_data, sudoable=sudoable) | |
| display.vvv(u"ESTABLISH SSH CONNECTION FOR USER: {0}".format(self._play_context.remote_user), host=self._play_context.remote_addr) | |
| # we can only use tty when we are not pipelining the modules. piping | |
| # data into /usr/bin/python inside a tty automatically invokes the | |
| # python interactive-mode but the modules are not compatible with the | |
| # interactive-mode ("unexpected indent" mainly because of empty lines) | |
| ssh_executable = self._play_context.ssh_executable | |
| # -tt can cause various issues in some environments so allow the user | |
| # to disable it as a troubleshooting method. | |
| use_tty = self.get_option('use_tty') | |
| if not in_data and sudoable and use_tty: | |
| args = (ssh_executable, '-tt', self.host, cmd) | |
| else: | |
| args = (ssh_executable, self.host, cmd) | |
| cmd = self._build_command(*args) | |
| (returncode, stdout, stderr) = self._run(cmd, in_data, sudoable=sudoable) | |
| return (returncode, stdout, stderr) | |
| def put_file(self, in_path, out_path): | |
| ''' transfer a file from local to remote ''' | |
| super(Connection, self).put_file(in_path, out_path) | |
| display.vvv(u"PUT {0} TO {1}".format(in_path, out_path), host=self.host) | |
| if not os.path.exists(to_bytes(in_path, errors='surrogate_or_strict')): | |
| raise AnsibleFileNotFound("file or module does not exist: {0}".format(to_native(in_path))) | |
| return self._file_transport_command(in_path, out_path, 'put') | |
| def fetch_file(self, in_path, out_path): | |
| ''' fetch a file from remote to local ''' | |
| super(Connection, self).fetch_file(in_path, out_path) | |
| display.vvv(u"FETCH {0} TO {1}".format(in_path, out_path), host=self.host) | |
| return self._file_transport_command(in_path, out_path, 'get') | |
| def reset(self): | |
| # If we have a persistent ssh connection (ControlPersist), we can ask it to stop listening. | |
| cmd = self._build_command(self._play_context.ssh_executable, '-O', 'stop', self.host) | |
| controlpersist, controlpath = self._persistence_controls(cmd) | |
| cp_arg = [a for a in cmd if a.startswith(b"ControlPath=")] | |
| # only run the reset if the ControlPath already exists or if it isn't | |
| # configured and ControlPersist is set | |
| run_reset = False | |
| if controlpersist and len(cp_arg) > 0: | |
| cp_path = cp_arg[0].split(b"=", 1)[-1] | |
| if os.path.exists(cp_path): | |
| run_reset = True | |
| elif controlpersist: | |
| run_reset = True | |
| if run_reset: | |
| display.vvv(u'sending stop: %s' % cmd) | |
| p = subprocess.Popen(cmd, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE) | |
| stdout, stderr = p.communicate() | |
| status_code = p.wait() | |
| if status_code != 0: | |
| display.warning("Failed to reset connection:%s" % stderr) | |
| self.close() | |
| def close(self): | |
| self._connected = False |
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