116 lines
3.3 KiB
Python
Executable File
116 lines
3.3 KiB
Python
Executable File
#!/usr/bin/env python
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# Copyright (C) 2011-2013 OpenStack Foundation
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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
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# implied.
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#
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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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import errno
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import time
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import socket
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import logging
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import paramiko
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from nodepool import exceptions
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log = logging.getLogger("nodepool.utils")
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# How long to sleep while waiting for something in a loop
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ITERATE_INTERVAL = 2
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def iterate_timeout(max_seconds, exc, purpose):
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start = time.time()
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count = 0
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while (time.time() < start + max_seconds):
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count += 1
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yield count
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time.sleep(ITERATE_INTERVAL)
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raise exc("Timeout waiting for %s" % purpose)
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def set_node_ip(node):
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'''
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Set the node public_ip
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'''
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if 'fake' in node.hostname:
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return
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addrinfo = socket.getaddrinfo(node.hostname, node.connection_port)[0]
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if addrinfo[0] == socket.AF_INET:
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node.public_ipv4 = addrinfo[4][0]
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elif addrinfo[0] == socket.AF_INET6:
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node.public_ipv6 = addrinfo[4][0]
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else:
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raise exceptions.LaunchNetworkException(
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"Unable to find public IP of server")
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def nodescan(ip, port=22, timeout=60, gather_hostkeys=True):
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'''
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Scan the IP address for public SSH keys.
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Keys are returned formatted as: "<type> <base64_string>"
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'''
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if 'fake' in ip:
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if gather_hostkeys:
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return ['ssh-rsa FAKEKEY']
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else:
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return []
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addrinfo = socket.getaddrinfo(ip, port)[0]
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family = addrinfo[0]
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sockaddr = addrinfo[4]
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keys = []
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key = None
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for count in iterate_timeout(
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timeout, exceptions.ConnectionTimeoutException,
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"connection on port %s" % port):
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sock = None
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t = None
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try:
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sock = socket.socket(family, socket.SOCK_STREAM)
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sock.settimeout(10)
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sock.connect(sockaddr)
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if gather_hostkeys:
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t = paramiko.transport.Transport(sock)
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t.start_client(timeout=timeout)
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key = t.get_remote_server_key()
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break
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except socket.error as e:
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if e.errno not in [errno.ECONNREFUSED, errno.EHOSTUNREACH, None]:
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log.exception(
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'Exception connecting to %s on port %s:' % (ip, port))
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except Exception as e:
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log.exception("ssh-keyscan failure: %s", e)
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finally:
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try:
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if t:
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t.close()
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except Exception as e:
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log.exception('Exception closing paramiko: %s', e)
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try:
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if sock:
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sock.close()
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except Exception as e:
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log.exception('Exception closing socket: %s', e)
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# Paramiko, at this time, seems to return only the ssh-rsa key, so
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# only the single key is placed into the list.
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if key:
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keys.append("%s %s" % (key.get_name(), key.get_base64()))
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return keys
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