Merge pull request #13775 from privateip/shared_module_shell
adds shared module shell for creating cli based transports
This commit is contained in:
Peter Sprygada
commit
7e677899a4
1 changed files with 82 additions and 83 deletions
|
|
@ -16,57 +16,43 @@
|
|||
# You should have received a copy of the GNU General Public License
|
||||
# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
|
||||
#
|
||||
"""
|
||||
Ansible shared module for building modules that require an interactive
|
||||
SSH Shell such as those for command line driven devices. This module
|
||||
provides a native SSH transport using paramiko and builds a base Shell
|
||||
class for creating shell driven modules.
|
||||
|
||||
In order to use this module, include it as part of a custom
|
||||
module as shown below and create and subclass Shell.
|
||||
|
||||
** Note: The order of the import statements does matter. **
|
||||
|
||||
from ansible.module_utils.basic import *
|
||||
from ansible.module_utils.ssh import *
|
||||
|
||||
This module provides the following common argument spec for creating
|
||||
shell connections:
|
||||
|
||||
* host (str) - [Required] The IPv4 address or FQDN of the device
|
||||
|
||||
* port (int) - Overrides the default SSH port.
|
||||
|
||||
* username (str) - [Required] The username to use to authenticate
|
||||
the SSH session.
|
||||
|
||||
* password (str) - [Required] The password to use to authenticate
|
||||
the SSH session
|
||||
|
||||
* connect_timeout (int) - Specifies the connection timeout in seconds
|
||||
|
||||
"""
|
||||
import re
|
||||
import socket
|
||||
|
||||
from StringIO import StringIO
|
||||
|
||||
import paramiko
|
||||
try:
|
||||
import paramiko
|
||||
HAS_PARAMIKO = True
|
||||
except ImportError:
|
||||
HAS_PARAMIKO = False
|
||||
|
||||
def shell_argument_spec(spec=None):
|
||||
""" Generates an argument spec for the Shell class
|
||||
"""
|
||||
arg_spec = dict(
|
||||
host=dict(required=True),
|
||||
port=dict(default=22, type='int'),
|
||||
username=dict(required=True),
|
||||
password=dict(required=True),
|
||||
connect_timeout=dict(default=10, type='int'),
|
||||
)
|
||||
if spec:
|
||||
arg_spec.update(spec)
|
||||
return arg_spec
|
||||
|
||||
ANSI_RE = re.compile(r'(\x1b\[\?1h\x1b=)')
|
||||
|
||||
CLI_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*)$')
|
||||
]
|
||||
|
||||
CLI_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 to_list(val):
|
||||
if isinstance(val, (list, tuple)):
|
||||
return list(val)
|
||||
elif val is not None:
|
||||
return [val]
|
||||
else:
|
||||
return list()
|
||||
|
||||
class ShellError(Exception):
|
||||
|
||||
|
|
@ -75,7 +61,6 @@ class ShellError(Exception):
|
|||
self.message = msg
|
||||
self.command = command
|
||||
|
||||
|
||||
class Command(object):
|
||||
|
||||
def __init__(self, command, prompt=None, response=None):
|
||||
|
|
@ -86,59 +71,47 @@ class Command(object):
|
|||
def __str__(self):
|
||||
return self.command
|
||||
|
||||
class Ssh(object):
|
||||
class Shell(object):
|
||||
|
||||
def __init__(self):
|
||||
self.client = None
|
||||
self.ssh = None
|
||||
self.shell = None
|
||||
|
||||
self.prompts = list()
|
||||
self.prompts.extend(CLI_PROMPTS_RE)
|
||||
|
||||
self.errors = list()
|
||||
self.errors.extend(CLI_ERRORS_RE)
|
||||
|
||||
def open(self, host, port=22, username=None, password=None,
|
||||
timeout=10, key_filename=None):
|
||||
|
||||
ssh = paramiko.SSHClient()
|
||||
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
|
||||
self.ssh = paramiko.SSHClient()
|
||||
self.ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
|
||||
|
||||
use_keys = password is None
|
||||
|
||||
ssh.connect(host, port=port, username=username, password=password,
|
||||
self.ssh.connect(host, port=port, username=username, password=password,
|
||||
timeout=timeout, allow_agent=use_keys, look_for_keys=use_keys,
|
||||
key_filename=key_filename)
|
||||
|
||||
self.client = ssh
|
||||
return self.on_open()
|
||||
|
||||
def on_open(self):
|
||||
pass
|
||||
|
||||
def close(self):
|
||||
self.client.close()
|
||||
return self.on_close()
|
||||
|
||||
def on_close(self):
|
||||
pass
|
||||
|
||||
|
||||
class Shell(Ssh):
|
||||
|
||||
def __init__(self):
|
||||
super(Shell, self).__init__()
|
||||
self.shell = None
|
||||
|
||||
self.prompts = list()
|
||||
self.errors = list()
|
||||
|
||||
def on_open(self):
|
||||
self.shell = self.client.invoke_shell()
|
||||
self.shell = self.ssh.invoke_shell()
|
||||
self.shell.settimeout(10)
|
||||
self.receive()
|
||||
|
||||
def strip(self, data):
|
||||
return ANSI_RE.sub('', data)
|
||||
|
||||
def receive(self, cmd=None):
|
||||
recv = StringIO()
|
||||
|
||||
while True:
|
||||
recv.write(self.shell.recv(200))
|
||||
data = self.shell.recv(200)
|
||||
|
||||
recv.write(data)
|
||||
recv.seek(recv.tell() - 200)
|
||||
|
||||
window = recv.read()
|
||||
window = self.strip(recv.read())
|
||||
|
||||
if isinstance(cmd, Command):
|
||||
self.handle_input(window, prompt=cmd.prompt,
|
||||
|
|
@ -146,19 +119,25 @@ class Shell(Ssh):
|
|||
|
||||
try:
|
||||
if self.read(window):
|
||||
resp = recv.getvalue()
|
||||
resp = self.strip(recv.getvalue())
|
||||
return self.sanitize(cmd, resp)
|
||||
except ShellError, exc:
|
||||
exc.command = cmd
|
||||
raise
|
||||
|
||||
def send(self, command):
|
||||
def send(self, commands):
|
||||
responses = list()
|
||||
try:
|
||||
cmd = '%s\r' % str(command)
|
||||
self.shell.sendall(cmd)
|
||||
return self.receive(command)
|
||||
for command in to_list(commands):
|
||||
cmd = '%s\r' % str(command)
|
||||
self.shell.sendall(cmd)
|
||||
responses.append(self.receive(command))
|
||||
except socket.timeout, exc:
|
||||
raise ShellError("timeout trying to send command", cmd)
|
||||
return responses
|
||||
|
||||
def close(self):
|
||||
self.shell.close()
|
||||
|
||||
def handle_input(self, resp, prompt, response):
|
||||
if not prompt or not response:
|
||||
|
|
@ -184,11 +163,31 @@ class Shell(Ssh):
|
|||
def read(self, response):
|
||||
for regex in self.errors:
|
||||
if regex.search(response):
|
||||
raise ShellError('{}'.format(response))
|
||||
raise ShellError('%s' % response)
|
||||
|
||||
for regex in self.prompts:
|
||||
if regex.search(response):
|
||||
return True
|
||||
|
||||
def get_cli_connection(module):
|
||||
host = module.params['host']
|
||||
port = module.params['port']
|
||||
if not port:
|
||||
port = 22
|
||||
|
||||
username = module.params['username']
|
||||
password = module.params['password']
|
||||
|
||||
try:
|
||||
cli = Cli()
|
||||
cli.open(host, port=port, username=username, password=password)
|
||||
except paramiko.ssh_exception.AuthenticationException, exc:
|
||||
module.fail_json(msg=exc.message)
|
||||
except socket.error, exc:
|
||||
host = '%s:%s' % (host, port)
|
||||
module.fail_json(msg=exc.strerror, errno=exc.errno, host=host)
|
||||
except socket.timeout:
|
||||
module.fail_json(msg='socket timed out')
|
||||
|
||||
return cli
|
||||
|
||||
Loading…
Reference in a new issue