3 The sliver manager has several functions. It is responsible for
4 creating, resource limiting, starting, stopping, and destroying
5 slivers. It provides an API for users to access these functions and
6 also to make inter-sliver resource loans. The sliver manager is also
7 responsible for handling delegation accounts.
10 try: from bwlimit import bwmin, bwmax
11 except ImportError: bwmin, bwmax = 8, 1000*1000*1000
20 DEFAULT_ALLOCATION = {
24 'cpu_share': 32, # proportional share
25 # bandwidth parameters
26 'net_min_rate': bwmin / 1000, # kbps
27 'net_max_rate': bwmax / 1000, # kbps
28 'net_share': 1, # proportional share
29 # bandwidth parameters over routes exempt from node bandwidth limits
30 'net_i2_min_rate': bwmin / 1000, # kbps
31 'net_i2_max_rate': bwmax / 1000, # kbps
32 'net_i2_share': 1, # proportional share
33 'disk_max': 5000000 # bytes
36 start_requested = False # set to True in order to request that all slivers be started
39 @database.synchronized
40 def GetSlivers(data, fullupdate=True):
41 """This function has two purposes. One, convert GetSlivers() data
42 into a more convenient format. Two, even if no updates are coming
43 in, use the GetSlivers() heartbeat as a cue to scan for expired
48 f = open('/etc/planetlab/node_id')
49 try: node_id = int(f.read())
51 except: logger.log_exc()
53 if data.has_key('node_id') and data['node_id'] != node_id: return
55 if data.has_key('networks'):
56 for network in data['networks']:
57 if network['is_primary'] and network['bwlimit'] is not None:
58 DEFAULT_ALLOCATION['net_max_rate'] = network['bwlimit'] / 1000
60 ### Emulab-specific hack begins here
62 'instantiation': 'plc-instantiated',
63 'keys': '''ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEA5Rimz6osRvlAUcaxe0YNfGsLL4XYBN6H30V3l/0alZOSXbGOgWNdEEdohwbh9E8oYgnpdEs41215UFHpj7EiRudu8Nm9mBI51ARHA6qF6RN+hQxMCB/Pxy08jDDBOGPefINq3VI2DRzxL1QyiTX0jESovrJzHGLxFTB3Zs+Y6CgmXcnI9i9t/zVq6XUAeUWeeXA9ADrKJdav0SxcWSg+B6F1uUcfUd5AHg7RoaccTldy146iF8xvnZw0CfGRCq2+95AU9rbMYS6Vid8Sm+NS+VLaAyJaslzfW+CAVBcywCOlQNbLuvNmL82exzgtl6fVzutRFYLlFDwEM2D2yvg4BQ== root@boss.emulab.net''',
64 'name': 'utah_elab_delegate',
65 'timestamp': data['timestamp'],
69 database.db.deliver_record(emulabdelegate)
70 ### Emulab-specific hack ends here
71 for sliver in data['slivers']:
73 rec.setdefault('timestamp', data['timestamp'])
75 # convert attributes field to a proper dict
77 for attr in rec.pop('attributes'): attr_dict[attr['name']] = attr['value']
80 keys = rec.pop('keys')
81 rec.setdefault('keys', '\n'.join([key_struct['key'] for key_struct in keys]))
83 rec.setdefault('type', attr_dict.get('type', 'sliver.VServer'))
84 rec.setdefault('vref', attr_dict.get('vref', 'default'))
85 rec.setdefault('initscript', attr_dict.get('initscript', ''))
86 rec.setdefault('delegations', []) # XXX - delegation not yet supported
88 # extract the implied rspec
91 for resname, default_amt in DEFAULT_ALLOCATION.iteritems():
92 try: amt = int(attr_dict[resname])
93 except (KeyError, ValueError): amt = default_amt
95 database.db.deliver_record(rec)
96 if fullupdate: database.db.set_min_timestamp(data['timestamp'])
99 # handle requested startup
100 global start_requested
102 start_requested = False
104 for name in database.db.iterkeys():
105 accounts.get(name).start(delay=cumulative_delay)
106 cumulative_delay += 3
108 def deliver_ticket(data): return GetSlivers(data, fullupdate=False)
111 def start(options, config):
112 accounts.register_class(sliver_vs.Sliver_VS)
113 accounts.register_class(delegate.Delegate)
114 global start_requested
115 start_requested = options.startup
117 api.deliver_ticket = deliver_ticket