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 1.20 2006/11/09 19:43:55 mlhuang 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"),
65 # foreign attributes management
66 # the key to track remote objects
67 foreign_key = 'hostname'
68 # the fields that get verbatim copied from foreign objects
69 foreign_fields = ['boot_state','model','version','date_created','last_updated']
71 def validate_hostname(self, hostname):
72 if not valid_hostname(hostname):
73 raise PLCInvalidArgument, "Invalid hostname"
75 conflicts = Nodes(self.api, [hostname])
76 for node in conflicts:
77 if 'node_id' not in self or self['node_id'] != node['node_id']:
78 raise PLCInvalidArgument, "Hostname already in use"
82 def validate_boot_state(self, boot_state):
83 boot_states = [row['boot_state'] for row in BootStates(self.api)]
84 if boot_state not in boot_states:
85 raise PLCInvalidArgument, "Invalid boot state"
89 def delete(self, commit = True):
94 assert 'node_id' in self
96 # Clean up miscellaneous join tables
97 for table in self.join_tables:
98 self.api.db.do("DELETE FROM %s WHERE node_id = %d" % \
99 (table, self['node_id']))
102 self['deleted'] = True
108 Representation of row(s) from the nodes table in the
112 def __init__(self, api, node_filter = None, columns = None, scope = 'all'):
113 Table.__init__(self, api, Node, columns)
115 sql = "SELECT %s FROM view_nodes WHERE deleted IS False" % \
116 ", ".join(self.columns)
118 if node_filter is not None:
119 if isinstance(node_filter, (list, tuple, set)):
120 # Separate the list into integers and strings
121 ints = filter(lambda x: isinstance(x, (int, long)), node_filter)
122 strs = filter(lambda x: isinstance(x, StringTypes), node_filter)
123 node_filter = Filter(Node.fields, {'node_id': ints, 'hostname': strs})
124 sql += " AND (%s)" % node_filter.sql(api, "OR")
125 elif isinstance(node_filter, dict):
126 node_filter = Filter(Node.fields, node_filter)
127 sql += " AND (%s)" % node_filter.sql(api, "AND")
130 sql += " AND (peer_id is NULL) "
131 elif scope == 'foreign':
132 sql += " AND (peer_id is NOT NULL) "