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a3e5388303
Create a module that does ssh and treats it like a console. The plan is to have a cliserver.py to behave in a manner resembling consoleserver.py, but with option to have multiple distinct sessions per target.
103 lines
3.6 KiB
Python
103 lines
3.6 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2015 Lenovo
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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__author__ = 'jjohnson2'
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# This plugin provides an ssh implementation comforming to the 'console'
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# specification. consoleserver or shellserver would be equally likely
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# to use this.
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import confluent.interface.console as conapi
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import eventlet
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paramiko = eventlet.import_patched('paramiko')
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class SshShell(conapi.Console):
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def __init__(self, node, config, username='', password=''):
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self.node = node
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self.nodeconfig = config
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self.username = username
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self.password = password
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self.inputmode = 0 # 0 = username, 1 = password...
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def recvdata(self):
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while self.connected:
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pendingdata = self.shell.recv(8192)
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if pendingdata == '':
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self.datacallback(conapi.ConsoleEvent.Disconnect)
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return
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self.datacallback(pendingdata)
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def connect(self, callback):
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# for now, we just use the nodename as the presumptive ssh destination
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#TODO(jjohnson2): use a 'nodeipget' utility function for architectures
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# that would rather not use the nodename as anything but an opaque
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# identifier
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self.datacallback = callback
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if self.username is not '':
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self.logon()
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else:
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self.inputmode = 0
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callback('\r\nlogin as: ')
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return
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def logon(self):
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self.ssh = paramiko.SSHClient()
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self.ssh.set_missing_host_key_policy(paramiko.client.AutoAddPolicy())
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try:
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self.ssh.connect(self.node, username=self.username,
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password=self.password, allow_agent=False,
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look_for_keys=False)
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except paramiko.AuthenticationException:
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self.inputmode = 0
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self.username = ''
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self.password = ''
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self.datacallback('\r\nlogin as: ')
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return
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self.inputmode = 2
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self.connected = True
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self.shell = self.ssh.invoke_shell()
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self.rxthread = eventlet.spawn(self.recvdata)
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def write(self, data):
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if self.inputmode == 0:
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self.username += data
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if '\r' in self.username:
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self.username, self.password = self.username.split('\r')
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lastdata = data.split('\r')[0]
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if lastdata != '':
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self.datacallback(lastdata)
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self.datacallback('\r\nEnter password: ')
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self.inputmode = 1
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else:
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# echo back typed data
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self.datacallback(data)
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elif self.inputmode == 1:
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self.password += data
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if '\r' in self.password:
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self.password = self.password.split('\r')[0]
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self.datacallback('\r\n')
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self.logon()
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else:
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self.shell.sendall(data)
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def close(self):
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self.ssh.close()
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def create(nodes, element, configmanager, inputdata):
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if len(nodes) == 1:
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return SshShell(nodes[0], configmanager) |