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 1.29 2007/01/09 16:13:36 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', 'peer_node']
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 'boot_state': Parameter(str, "Boot state", max = 20),
47 'model': Parameter(str, "Make and model of the actual machine", max = 255, nullok = True),
48 'boot_nonce': Parameter(str, "(Admin only) Random value generated by the node at last boot", max = 128),
49 'version': Parameter(str, "Apparent Boot CD version", max = 64),
50 'ssh_rsa_key': Parameter(str, "Last known SSH host key", max = 1024),
51 'date_created': Parameter(int, "Date and time when node entry was created", ro = True),
52 'last_updated': Parameter(int, "Date and time when node entry was created", ro = True),
53 'key': Parameter(str, "(Admin only) Node key", max = 256),
54 'session': Parameter(str, "(Admin only) Node session value", max = 256, ro = True),
55 'nodenetwork_ids': Parameter([int], "List of network interfaces that this node has"),
56 'nodegroup_ids': Parameter([int], "List of node groups that this node is in"),
57 'conf_file_ids': Parameter([int], "List of configuration files specific to this node"),
58 # 'root_person_ids': Parameter([int], "(Admin only) List of people who have root access to this node"),
59 'slice_ids': Parameter([int], "List of slices on this node"),
60 'pcu_ids': Parameter([int], "List of PCUs that control this node"),
61 'ports': Parameter([int], "List of PCU ports that this node is connected to"),
62 'peer_id': Parameter(int, "Peer to which this node belongs", nullok = True),
63 'peer_node_id': Parameter(int, "Foreign node identifier at peer", nullok = True),
67 class_key = 'hostname'
68 foreign_fields = ['boot_state','model','version']
69 # forget about these ones, they are read-only anyway
70 # handling them causes Cache to re-sync all over again
71 # 'date_created','last_updated'
73 # in this case, we dont need the 'table' but Cache will look it up, so...
74 {'field' : 'site_id' , 'class' : 'Site' , 'table' : 'unused-on-direct-refs' } ,
77 def validate_hostname(self, hostname):
78 if not valid_hostname(hostname):
79 raise PLCInvalidArgument, "Invalid hostname"
81 conflicts = Nodes(self.api, [hostname])
82 for node in conflicts:
83 if 'node_id' not in self or self['node_id'] != node['node_id']:
84 raise PLCInvalidArgument, "Hostname already in use"
88 def validate_boot_state(self, boot_state):
89 boot_states = [row['boot_state'] for row in BootStates(self.api)]
90 if boot_state not in boot_states:
91 raise PLCInvalidArgument, "Invalid boot state"
95 validate_date_created = Row.validate_timestamp
96 validate_last_updated = Row.validate_timestamp
98 def delete(self, commit = True):
100 Delete existing node.
103 assert 'node_id' in self
105 # Clean up miscellaneous join tables
106 for table in self.join_tables:
107 self.api.db.do("DELETE FROM %s WHERE node_id = %d" % \
108 (table, self['node_id']))
111 self['deleted'] = True
117 Representation of row(s) from the nodes table in the
121 def __init__(self, api, node_filter = None, columns = None):
122 Table.__init__(self, api, Node, columns)
124 sql = "SELECT %s FROM view_nodes WHERE deleted IS False" % \
125 ", ".join(self.columns)
127 if node_filter is not None:
128 if isinstance(node_filter, (list, tuple, set)):
129 # Separate the list into integers and strings
130 ints = filter(lambda x: isinstance(x, (int, long)), node_filter)
131 strs = filter(lambda x: isinstance(x, StringTypes), node_filter)
132 node_filter = Filter(Node.fields, {'node_id': ints, 'hostname': strs})
133 sql += " AND (%s)" % node_filter.sql(api, "OR")
134 elif isinstance(node_filter, dict):
135 node_filter = Filter(Node.fields, node_filter)
136 sql += " AND (%s)" % node_filter.sql(api, "AND")