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 1.21 2006/11/21 10:57:00 thierry Exp $
10 from types import StringTypes
13 from PLC.Faults import *
14 from PLC.Parameter import Parameter
15 from PLC.Filter import Filter
16 from PLC.Debug import profile
17 from PLC.Table import Row, Table
18 from PLC.NodeNetworks import NodeNetwork, NodeNetworks
19 from PLC.BootStates import BootStates
21 def valid_hostname(hostname):
22 # 1. Each part begins and ends with a letter or number.
23 # 2. Each part except the last can contain letters, numbers, or hyphens.
24 # 3. Each part is between 1 and 64 characters, including the trailing dot.
25 # 4. At least two parts.
26 # 5. Last part can only contain between 2 and 6 letters.
27 good_hostname = r'^([a-z0-9]([a-z0-9-]{0,61}[a-z0-9])?\.)+' \
30 re.match(good_hostname, hostname, re.IGNORECASE)
34 Representation of a row in the nodes table. To use, optionally
35 instantiate with a dict of values. Update as you would a
36 dict. Commit to the database with sync().
40 primary_key = 'node_id'
41 join_tables = ['nodegroup_node', 'conf_file_node', 'nodenetworks', 'pcu_node', 'slice_node', 'slice_attribute', 'node_session']
43 'node_id': Parameter(int, "Node identifier"),
44 'hostname': Parameter(str, "Fully qualified hostname", max = 255),
45 'site_id': Parameter(int, "Site at which this node is located"),
46 'peer_id': Parameter(int, "Peer at which this node is managed", nullok = True),
47 'boot_state': Parameter(str, "Boot state", max = 20),
48 'model': Parameter(str, "Make and model of the actual machine", max = 255, nullok = True),
49 'boot_nonce': Parameter(str, "(Admin only) Random value generated by the node at last boot", max = 128),
50 'version': Parameter(str, "Apparent Boot CD version", max = 64),
51 'ssh_rsa_key': Parameter(str, "Last known SSH host key", max = 1024),
52 'date_created': Parameter(int, "Date and time when node entry was created", ro = True),
53 'last_updated': Parameter(int, "Date and time when node entry was created", ro = True),
54 'key': Parameter(str, "(Admin only) Node key", max = 256),
55 'session': Parameter(str, "(Admin only) Node session value", max = 256, ro = True),
56 'nodenetwork_ids': Parameter([int], "List of network interfaces that this node has"),
57 'nodegroup_ids': Parameter([int], "List of node groups that this node is in"),
58 'conf_file_ids': Parameter([int], "List of configuration files specific to this node"),
59 # 'root_person_ids': Parameter([int], "(Admin only) List of people who have root access to this node"),
60 'slice_ids': Parameter([int], "List of slices on this node"),
61 'pcu_ids': Parameter([int], "List of PCUs that control this node"),
62 'ports': Parameter([int], "List of PCU ports that this node is connected to"),
66 class_key = 'hostname'
67 foreign_fields = ['boot_state','model','version','date_created','last_updated']
70 def validate_hostname(self, hostname):
71 if not valid_hostname(hostname):
72 raise PLCInvalidArgument, "Invalid hostname"
74 conflicts = Nodes(self.api, [hostname])
75 for node in conflicts:
76 if 'node_id' not in self or self['node_id'] != node['node_id']:
77 raise PLCInvalidArgument, "Hostname already in use"
81 def validate_boot_state(self, boot_state):
82 boot_states = [row['boot_state'] for row in BootStates(self.api)]
83 if boot_state not in boot_states:
84 raise PLCInvalidArgument, "Invalid boot state"
88 def delete(self, commit = True):
93 assert 'node_id' in self
95 # Clean up miscellaneous join tables
96 for table in self.join_tables:
97 self.api.db.do("DELETE FROM %s WHERE node_id = %d" % \
98 (table, self['node_id']))
101 self['deleted'] = True
107 Representation of row(s) from the nodes table in the
111 def __init__(self, api, node_filter = None, columns = None, scope = 'all'):
112 Table.__init__(self, api, Node, columns)
114 sql = "SELECT %s FROM view_nodes WHERE deleted IS False" % \
115 ", ".join(self.columns)
117 if node_filter is not None:
118 if isinstance(node_filter, (list, tuple, set)):
119 # Separate the list into integers and strings
120 ints = filter(lambda x: isinstance(x, (int, long)), node_filter)
121 strs = filter(lambda x: isinstance(x, StringTypes), node_filter)
122 node_filter = Filter(Node.fields, {'node_id': ints, 'hostname': strs})
123 sql += " AND (%s)" % node_filter.sql(api, "OR")
124 elif isinstance(node_filter, dict):
125 node_filter = Filter(Node.fields, node_filter)
126 sql += " AND (%s)" % node_filter.sql(api, "AND")
129 sql += " AND (peer_id is NULL) "
130 elif scope == 'foreign':
131 sql += " AND (peer_id is NOT NULL) "