+ try:
+ self._node = node
+ node_hash = self._node_hash(node)
+ if node_hash in SSH.__existing_connections:
+ self._ssh = SSH.__existing_connections[node_hash]
+ logger.debug('reusing ssh: {0}'.format(self._ssh))
+ else:
+ start = time()
+ pkey = None
+ if 'priv_key' in node:
+ pkey = RSAKey.from_private_key(
+ StringIO.StringIO(node['priv_key']))
+
+ self._ssh = paramiko.SSHClient()
+ self._ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
+
+ self._ssh.connect(node['host'], username=node['username'],
+ password=node.get('password'), pkey=pkey,
+ port=node['port'])
+
+ self._ssh.get_transport().set_keepalive(10)
+
+ SSH.__existing_connections[node_hash] = self._ssh
+
+ logger.trace('connect took {} seconds'.format(time() - start))
+ logger.debug('new ssh: {0}'.format(self._ssh))
+
+ logger.debug('Connect peer: {0}'.
+ format(self._ssh.get_transport().getpeername()))
+ logger.debug('Connections: {0}'.
+ format(str(SSH.__existing_connections)))
+ except:
+ if attempts > 0:
+ self._reconnect(attempts-1)
+ else:
+ raise
+
+ def disconnect(self, node):
+ """Close SSH connection to the node.
+
+ :param node: The node to disconnect from.
+ :type node: dict
+ """