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# Copyright (c) 2006-2009 Mitch Garnaat http://garnaat.org/
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish, dis-
# tribute, sublicense, and/or sell copies of the Software, and to permit
# persons to whom the Software is furnished to do so, subject to the fol-
# lowing conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
# ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
# SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
from boto.mashups.interactive import interactive_shell
import boto
import os, time, shutil
import StringIO
import paramiko
import socket
class SSHClient(object):
def __init__(self, server, host_key_file='~/.ssh/known_hosts', uname='root'):
self.server = server
self.host_key_file = host_key_file
self.uname = uname
self._pkey = paramiko.RSAKey.from_private_key_file(server.ssh_key_file)
self._ssh_client = paramiko.SSHClient()
self._ssh_client.load_system_host_keys()
self._ssh_client.load_host_keys(os.path.expanduser(host_key_file))
self._ssh_client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
self.connect()
def connect(self):
retry = 0
while retry < 5:
try:
self._ssh_client.connect(self.server.hostname, username=self.uname, pkey=self._pkey)
return
except socket.error, (value,message):
if value == 61:
print 'SSH Connection refused, will retry in 5 seconds'
time.sleep(5)
retry += 1
else:
raise
except paramiko.BadHostKeyException:
print "%s has an entry in ~/.ssh/known_hosts and it doesn't match" % self.server.hostname
print 'Edit that file to remove the entry and then hit return to try again'
rawinput('Hit Enter when ready')
retry += 1
except EOFError:
print 'Unexpected Error from SSH Connection, retry in 5 seconds'
time.sleep(5)
retry += 1
print 'Could not establish SSH connection'
def get_file(self, src, dst):
sftp_client = self._ssh_client.open_sftp()
sftp_client.get(src, dst)
def put_file(self, src, dst):
sftp_client = self._ssh_client.open_sftp()
sftp_client.put(src, dst)
def listdir(self, path):
sftp_client = self._ssh_client.open_sftp()
return sftp_client.listdir(path)
def open_sftp(self):
return self._ssh_client.open_sftp()
def isdir(self, path):
status = self.run('[ -d %s ] || echo "FALSE"' % path)
if status[1].startswith('FALSE'):
return 0
return 1
def exists(self, path):
status = self.run('[ -a %s ] || echo "FALSE"' % path)
if status[1].startswith('FALSE'):
return 0
return 1
def shell(self):
channel = self._ssh_client.invoke_shell()
interactive_shell(channel)
def run(self, command):
boto.log.info('running:%s on %s' % (command, self.server.instance_id))
log_fp = StringIO.StringIO()
status = 0
try:
t = self._ssh_client.exec_command(command)
except paramiko.SSHException:
status = 1
log_fp.write(t[1].read())
log_fp.write(t[2].read())
t[0].close()
t[1].close()
t[2].close()
boto.log.info('output: %s' % log_fp.getvalue())
return (status, log_fp.getvalue())
def close(self):
transport = self._ssh_client.get_transport()
transport.close()
self.server.reset_cmdshell()
class LocalClient(object):
def __init__(self, server, host_key_file=None, uname='root'):
self.server = server
self.host_key_file = host_key_file
self.uname = uname
def get_file(self, src, dst):
shutil.copyfile(src, dst)
def put_file(self, src, dst):
shutil.copyfile(src, dst)
def listdir(self, path):
return os.listdir(path)
def isdir(self, path):
return os.path.isdir(path)
def exists(self, path):
return os.path.exists(path)
def shell(self):
raise NotImplementedError, 'shell not supported with LocalClient'
def run(self):
boto.log.info('running:%s' % self.command)
log_fp = StringIO.StringIO()
process = subprocess.Popen(self.command, shell=True, stdin=subprocess.PIPE,
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
while process.poll() == None:
time.sleep(1)
t = process.communicate()
log_fp.write(t[0])
log_fp.write(t[1])
boto.log.info(log_fp.getvalue())
boto.log.info('output: %s' % log_fp.getvalue())
return (process.returncode, log_fp.getvalue())
def close(self):
pass
def start(server):
instance_id = boto.config.get('Instance', 'instance-id', None)
if instance_id == server.instance_id:
return LocalClient(server)
else:
return SSHClient(server)
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