2 # Functions for interacting with the nodes table in the database
4 # Mark Huang <mlhuang@cs.princeton.edu>
5 # Copyright (C) 2006 The Trustees of Princeton University
7 # $Id: Nodes.py,v 1.8 2006/10/02 18:32:31 mlhuang Exp $
10 from types import StringTypes
13 from PLC.Faults import *
14 from PLC.Parameter import Parameter
15 from PLC.Debug import profile
16 from PLC.Table import Row, Table
17 from PLC.NodeNetworks import NodeNetwork, NodeNetworks
18 from PLC.BootStates import BootStates
22 Representation of a row in the nodes table. To use, optionally
23 instantiate with a dict of values. Update as you would a
24 dict. Commit to the database with sync().
28 primary_key = 'node_id'
30 'node_id': Parameter(int, "Node identifier"),
31 'hostname': Parameter(str, "Fully qualified hostname", max = 255),
32 'site_id': Parameter(int, "Site at which this node is located"),
33 'boot_state': Parameter(str, "Boot state", max = 20),
34 'model': Parameter(str, "Make and model of the actual machine", max = 255),
35 'boot_nonce': Parameter(str, "(Admin only) Random value generated by the node at last boot", max = 128),
36 'version': Parameter(str, "Apparent Boot CD version", max = 64),
37 'ssh_rsa_key': Parameter(str, "Last known SSH host key", max = 1024),
38 'date_created': Parameter(str, "Date and time when node entry was created", ro = True),
39 'last_updated': Parameter(str, "Date and time when node entry was created", ro = True),
40 'key': Parameter(str, "(Admin only) Node key", max = 256),
41 'session': Parameter(str, "(Admin only) Node session value", max = 256),
42 'nodenetwork_ids': Parameter([int], "List of network interfaces that this node has", ro = True),
43 'nodegroup_ids': Parameter([int], "List of node groups that this node is in", ro = True),
44 # 'conf_file_ids': Parameter([int], "List of configuration files specific to this node", ro = True),
45 # 'root_person_ids': Parameter([int], "(Admin only) List of people who have root access to this node", ro = True),
46 'slice_ids': Parameter([int], "List of slices on this node", ro = True),
47 # 'pcu_ids': Parameter([int], "List of PCUs that control this node", ro = True),
50 def __init__(self, api, fields):
51 Row.__init__(self, fields)
54 def validate_hostname(self, hostname):
55 # 1. Each part begins and ends with a letter or number.
56 # 2. Each part except the last can contain letters, numbers, or hyphens.
57 # 3. Each part is between 1 and 64 characters, including the trailing dot.
58 # 4. At least two parts.
59 # 5. Last part can only contain between 2 and 6 letters.
60 good_hostname = r'^([a-z0-9]([a-z0-9-]{0,61}[a-z0-9])?\.)+' \
63 not re.match(good_hostname, hostname, re.IGNORECASE):
64 raise PLCInvalidArgument, "Invalid hostname"
66 conflicts = Nodes(self.api, [hostname])
67 for node_id, node in conflicts.iteritems():
68 if 'node_id' not in self or self['node_id'] != node_id:
69 raise PLCInvalidArgument, "Hostname already in use"
71 # Check for conflicts with a nodenetwork hostname
72 conflicts = NodeNetworks(self.api, [hostname])
73 for nodenetwork_id in conflicts:
74 if 'nodenetwork_ids' not in self or nodenetwork_id not in self['nodenetwork_ids']:
75 raise PLCInvalidArgument, "Hostname already in use"
79 def validate_boot_state(self, boot_state):
80 if boot_state not in BootStates(self.api):
81 raise PLCInvalidArgument, "Invalid boot state"
85 def delete(self, commit = True):
90 assert 'node_id' in self
92 # Delete all nodenetworks
93 nodenetworks = NodeNetworks(self.api, self['nodenetwork_ids'])
94 for nodenetwork in nodenetworks.values():
95 nodenetwork.delete(commit = False)
97 # Clean up miscellaneous join tables
98 for table in ['nodegroup_node', 'slice_node', 'slice_attribute']:
99 self.api.db.do("DELETE FROM %s" \
100 " WHERE node_id = %d" % \
101 (table, self['node_id']))
104 self['deleted'] = True
109 Representation of row(s) from the nodes table in the
113 def __init__(self, api, node_id_or_hostname_list = None):
116 sql = "SELECT %s FROM view_nodes WHERE deleted IS False" % \
117 ", ".join(Node.fields)
119 if node_id_or_hostname_list:
120 # Separate the list into integers and strings
121 node_ids = filter(lambda node_id: isinstance(node_id, (int, long)),
122 node_id_or_hostname_list)
123 hostnames = filter(lambda hostname: isinstance(hostname, StringTypes),
124 node_id_or_hostname_list)
127 sql += " OR node_id IN (%s)" % ", ".join(map(str, node_ids))
129 sql += " OR hostname IN (%s)" % ", ".join(api.db.quote(hostnames)).lower()
132 rows = self.api.db.selectall(sql)
135 self[row['node_id']] = node = Node(api, row)
136 for aggregate in ['nodenetwork_ids', 'nodegroup_ids',
137 'conf_file_ids', 'root_person_ids', 'slice_ids',
139 if not node.has_key(aggregate) or node[aggregate] is None:
142 node[aggregate] = map(int, node[aggregate].split(','))