Added boto/ to depot_tools/third_party

third_party/boto/manage/cmdshell.py

+# 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
+import time
+import shutil
+import StringIO
+import paramiko
+import socket
+import subprocess
+
+
+class SSHClient(object):
+
+    def __init__(self, server,
+                 host_key_file='~/.ssh/known_hosts',
+                 uname='root', ssh_pwd=None):
+        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,
+                                                           password=ssh_pwd)
+        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, num_retries=5):
+        retry = 0
+        while retry < num_retries:
+            try:
+                self._ssh_client.connect(self.server.hostname,
+                                         username=self.uname,
+                                         pkey=self._pkey)
+                return
+            except socket.error, (value, message):
+                if value in (51, 61, 111):
+                    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'
+                raw_input('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 open_sftp(self):
+        return self._ssh_client.open_sftp()
+
+    def get_file(self, src, dst):
+        sftp_client = self.open_sftp()
+        sftp_client.get(src, dst)
+
+    def put_file(self, src, dst):
+        sftp_client = self.open_sftp()
+        sftp_client.put(src, dst)
+
+    def open(self, filename, mode='r', bufsize=-1):
+        """
+        Open a file on the remote system and return a file-like object.
+        """
+        sftp_client = self.open_sftp()
+        return sftp_client.open(filename, mode, bufsize)
+
+    def listdir(self, path):
+        sftp_client = self.open_sftp()
+        return sftp_client.listdir(path)
+
+    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):
+        """
+        Start an interactive shell session on the remote host.
+        """
+        channel = self._ssh_client.invoke_shell()
+        interactive_shell(channel)
+
+    def run(self, command):
+        """
+        Execute a command on the remote host.  Return a tuple containing
+        an integer status and a two strings, the first containing stdout
+        and the second containing stderr from the command.
+        """
+        boto.log.debug('running:%s on %s' % (command, self.server.instance_id))
+        status = 0
+        try:
+            t = self._ssh_client.exec_command(command)
+        except paramiko.SSHException:
+            status = 1
+        std_out = t[1].read()
+        std_err = t[2].read()
+        t[0].close()
+        t[1].close()
+        t[2].close()
+        boto.log.debug('stdout: %s' % std_out)
+        boto.log.debug('stderr: %s' % std_err)
+        return (status, std_out, std_err)
+
+    def run_pty(self, command):
+        """
+        Execute a command on the remote host with a pseudo-terminal.
+        Returns a string containing the output of the command.
+        """
+        boto.log.debug('running:%s on %s' % (command, self.server.instance_id))
+        channel = self._ssh_client.get_transport().open_session()
+        channel.get_pty()
+        channel.exec_command(command)
+        return channel
+
+    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
+
+class FakeServer(object):
+    """
+    A little class to fake out SSHClient (which is expecting a
+    :class`boto.manage.server.Server` instance.  This allows us
+    to
+    """
+    def __init__(self, instance, ssh_key_file):
+        self.instance = instance
+        self.ssh_key_file = ssh_key_file
+        self.hostname = instance.dns_name
+        self.instance_id = self.instance.id
+
+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)
+
+def sshclient_from_instance(instance, ssh_key_file,
+                            host_key_file='~/.ssh/known_hosts',
+                            user_name='root', ssh_pwd=None):
+    """
+    Create and return an SSHClient object given an
+    instance object.
+
+    :type instance: :class`boto.ec2.instance.Instance` object
+    :param instance: The instance object.
+
+    :type ssh_key_file: str
+    :param ssh_key_file: A path to the private key file used
+                         to log into instance.
+
+    :type host_key_file: str
+    :param host_key_file: A path to the known_hosts file used
+                          by the SSH client.
+                          Defaults to ~/.ssh/known_hosts
+    :type user_name: str
+    :param user_name: The username to use when logging into
+                      the instance.  Defaults to root.
+
+    :type ssh_pwd: str
+    :param ssh_pwd: The passphrase, if any, associated with
+                    private key.
+    """
+    s = FakeServer(instance, ssh_key_file)
+    return SSHClient(s, host_key_file, user_name, ssh_pwd)