57 lines
1.7 KiB
Python
57 lines
1.7 KiB
Python
#!/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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from sshclient import SSHClient
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import fakeprovider
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log = logging.getLogger("nodepool.utils")
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def iterate_timeout(max_seconds, 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(2)
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raise Exception("Timeout waiting for %s" % purpose)
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def ssh_connect(ip, username, connect_kwargs={}, timeout=60):
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if ip == 'fake':
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return fakeprovider.FakeSSHClient()
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# HPcloud may return ECONNREFUSED or EHOSTUNREACH
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# for about 30 seconds after adding the IP
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for count in iterate_timeout(timeout, "ssh access"):
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try:
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client = SSHClient(ip, username, **connect_kwargs)
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break
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except socket.error, e:
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if e[0] not in [errno.ECONNREFUSED, errno.EHOSTUNREACH]:
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log.exception('Exception while testing ssh access:')
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out = client.ssh("test ssh access", "echo access okay", output=True)
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if "access okay" in out:
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return client
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return None
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