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source: fedd/federation/protogeni_access.py @ d894c21

axis_examplecompt_changesinfo-ops

Last change on this file since d894c21 was 027b87b, checked in by Ted Faber <faber@…>, 14 years ago
This little class added a useless complexity. While I'm in here I removed it.
Property mode set to `100644`
File size: 46.9 KB

Line
1	#!/usr/local/bin/python
2
3	import os,sys
4	import stat # for chmod constants
5	import re
6	import time
7	import string
8	import copy
9	import pickle
10	import logging
11	import subprocess
12	import random
13	import traceback
14	import xml.parsers.expat
15
16	from threading import Thread, Timer, Lock
17
18	from util import *
19	from fedid import fedid, generate_fedid
20	from authorizer import authorizer
21	from service_error import service_error
22	from remote_service import xmlrpc_handler, soap_handler, service_caller
23
24	import httplib
25	import tempfile
26	from urlparse import urlparse
27
28	from access import access_base
29	from protogeni_proxy import protogeni_proxy
30	from geniapi_proxy import geniapi_proxy
31
32	import topdl
33	import list_log
34
35
36	# Make log messages disappear if noone configures a fedd logger
37	class nullHandler(logging.Handler):
38	def emit(self, record): pass
39
40	fl = logging.getLogger("fedd.access")
41	fl.addHandler(nullHandler())
42
43	class access(access_base):
44	"""
45	The implementation of access control based on mapping users to projects.
46
47	Users can be mapped to existing projects or have projects created
48	dynamically. This implements both direct requests and proxies.
49	"""
50
51	def __init__(self, config=None, auth=None):
52	"""
53	Initializer. Pulls parameters out of the ConfigParser's access section.
54	"""
55
56	access_base.__init__(self, config, auth)
57
58	self.domain = config.get("access", "domain")
59	self.userconfdir = config.get("access","userconfdir")
60	self.userconfcmd = config.get("access","userconfcmd")
61	self.userconfurl = config.get("access","userconfurl")
62	self.federation_software = config.get("access", "federation_software")
63	self.portal_software = config.get("access", "portal_software")
64	self.ssh_port = config.get("access","ssh_port") or "22"
65	self.sshd = config.get("access","sshd")
66	self.sshd_config = config.get("access", "sshd_config")
67	self.access_type = config.get("access", "type")
68	self.staging_dir = config.get("access", "staging_dir") or "/tmp"
69	self.staging_host = config.get("access", "staging_host") \
70	or "ops.emulab.net"
71	self.local_seer_software = config.get("access", "local_seer_software")
72	self.local_seer_image = config.get("access", "local_seer_image")
73	self.local_seer_start = config.get("access", "local_seer_start")
74
75	self.dragon_endpoint = config.get("access", "dragon")
76	self.dragon_vlans = config.get("access", "dragon_vlans")
77	self.deter_internal = config.get("access", "deter_internal")
78
79	self.tunnel_config = config.getboolean("access", "tunnel_config")
80	self.portal_command = config.get("access", "portal_command")
81	self.portal_image = config.get("access", "portal_image")
82	self.portal_type = config.get("access", "portal_type") or "pc"
83	self.portal_startcommand = config.get("access", "portal_startcommand")
84	self.node_startcommand = config.get("access", "node_startcommand")
85
86	self.federation_software = self.software_list(self.federation_software)
87	self.portal_software = self.software_list(self.portal_software)
88	self.local_seer_software = self.software_list(self.local_seer_software)
89
90	self.renewal_interval = config.get("access", "renewal") or (3 * 60 )
91	self.renewal_interval = int(self.renewal_interval) * 60
92
93	self.ch_url = config.get("access", "ch_url")
94	self.sa_url = config.get("access", "sa_url")
95	self.cm_url = config.get("access", "cm_url")
96
97	self.restricted = [ ]
98
99	# read_state in the base_class
100	self.state_lock.acquire()
101	for a in ('allocation', 'projects', 'keys', 'types'):
102	if a not in self.state:
103	self.state[a] = { }
104	self.allocation = self.state['allocation']
105	self.projects = self.state['projects']
106	self.keys = self.state['keys']
107	self.types = self.state['types']
108	# Add the ownership attributes to the authorizer. Note that the
109	# indices of the allocation dict are strings, but the attributes are
110	# fedids, so there is a conversion.
111	for k in self.state.get('allocation', {}).keys():
112	for o in self.state['allocation'][k].get('owners', []):
113	self.auth.set_attribute(o, fedid(hexstr=k))
114	self.auth.set_attribute(fedid(hexstr=k),fedid(hexstr=k))
115
116	self.state_lock.release()
117
118
119	self.log = logging.getLogger("fedd.access")
120	set_log_level(config, "access", self.log)
121
122	self.access = { }
123	if config.has_option("access", "accessdb"):
124	self.read_access(config.get("access", "accessdb"),
125	access_obj=self.make_access_info)
126
127	self.lookup_access = self.lookup_access_base
128
129	api = config.get("access", "api") or "protogeni"
130	if api == "protogeni":
131	self.api_proxy = protogeni_proxy
132	elif api == "geniapi":
133	self.api_proxy = geniapi_proxy
134	else:
135	self.log.debug("Unknown interface, using protogeni")
136	self.api_proxy = protogeni_proxy
137
138	self.call_SetValue = service_caller('SetValue')
139	self.call_GetValue = service_caller('GetValue')
140	self.exports = {
141	'local_seer_control': self.export_local_seer,
142	'seer_master': self.export_seer_master,
143	'hide_hosts': self.export_hide_hosts,
144	}
145
146	if not self.local_seer_image or not self.local_seer_software or \
147	not self.local_seer_start:
148	if 'local_seer_control' in self.exports:
149	del self.exports['local_seer_control']
150
151	if not self.local_seer_image or not self.local_seer_software or \
152	not self.seer_master_start:
153	if 'seer_master' in self.exports:
154	del self.exports['seer_master']
155
156	self.RenewSlices()
157
158	self.soap_services = {\
159	'RequestAccess': soap_handler("RequestAccess", self.RequestAccess),
160	'ReleaseAccess': soap_handler("ReleaseAccess", self.ReleaseAccess),
161	'StartSegment': soap_handler("StartSegment", self.StartSegment),
162	'TerminateSegment': soap_handler("TerminateSegment",
163	self.TerminateSegment),
164	}
165	self.xmlrpc_services = {\
166	'RequestAccess': xmlrpc_handler('RequestAccess',
167	self.RequestAccess),
168	'ReleaseAccess': xmlrpc_handler('ReleaseAccess',
169	self.ReleaseAccess),
170	'StartSegment': xmlrpc_handler("StartSegment", self.StartSegment),
171	'TerminateSegment': xmlrpc_handler('TerminateSegment',
172	self.TerminateSegment),
173	}
174
175	@staticmethod
176	def make_access_info(s):
177	"""
178	Split a string of the form (id, id, id, id) ito its constituent tuples
179	and return them as a tuple. Use to import access info from the
180	access_db.
181	"""
182
183	ss = s.strip()
184	if ss.startswith('(') and ss.endswith(')'):
185	l = [ s.strip() for s in ss[1:-1].split(",")]
186	if len(l) == 4:
187	return tuple(l)
188	else:
189	raise self.parse_error(
190	"Exactly 4 elements in access info required")
191	else:
192	raise self.parse_error("Expecting parenthezied values")
193
194
195	def get_handler(self, path, fid):
196	self.log.info("Get handler %s %s" % (path, fid))
197	if self.auth.check_attribute(fid, path) and self.userconfdir:
198	return ("%s/%s" % (self.userconfdir, path), "application/binary")
199	else:
200	return (None, None)
201
202	def build_access_response(self, alloc_id, services):
203	"""
204	Create the SOAP response.
205
206	Build the dictionary description of the response and use
207	fedd_utils.pack_soap to create the soap message. ap is the allocate
208	project message returned from a remote project allocation (even if that
209	allocation was done locally).
210	"""
211	# Because alloc_id is already a fedd_services_types.IDType_Holder,
212	# there's no need to repack it
213	msg = {
214	'allocID': alloc_id,
215	'fedAttr': [
216	{ 'attribute': 'domain', 'value': self.domain } ,
217	]
218	}
219	if self.dragon_endpoint:
220	msg['fedAttr'].append({'attribute': 'dragon',
221	'value': self.dragon_endpoint})
222	if self.deter_internal:
223	msg['fedAttr'].append({'attribute': 'deter_internal',
224	'value': self.deter_internal})
225	#XXX: ??
226	if self.dragon_vlans:
227	msg['fedAttr'].append({'attribute': 'vlans',
228	'value': self.dragon_vlans})
229
230	if services:
231	msg['service'] = services
232	return msg
233
234	def RequestAccess(self, req, fid):
235	"""
236	Handle the access request.
237	"""
238
239	# The dance to get into the request body
240	if req.has_key('RequestAccessRequestBody'):
241	req = req['RequestAccessRequestBody']
242	else:
243	raise service_error(service_error.req, "No request!?")
244
245	if req.has_key('destinationTestbed'):
246	dt = unpack_id(req['destinationTestbed'])
247
248	# Request for this fedd
249	found, match = self.lookup_access(req, fid)
250	services, svc_state = self.export_services(req.get('service',[]),
251	None, None)
252	# keep track of what's been added
253	allocID, alloc_cert = generate_fedid(subj="alloc", log=self.log)
254	aid = unicode(allocID)
255
256	self.state_lock.acquire()
257	self.allocation[aid] = { }
258	# The protoGENI certificate
259	self.allocation[aid]['credentials'] = found
260	# The list of owner FIDs
261	self.allocation[aid]['owners'] = [ fid ]
262	self.write_state()
263	self.state_lock.release()
264	self.auth.set_attribute(fid, allocID)
265	self.auth.set_attribute(allocID, allocID)
266
267	try:
268	f = open("%s/%s.pem" % (self.certdir, aid), "w")
269	print >>f, alloc_cert
270	f.close()
271	except EnvironmentError, e:
272	raise service_error(service_error.internal,
273	"Can't open %s/%s : %s" % (self.certdir, aid, e))
274	return self.build_access_response({ 'fedid': allocID }, None)
275
276
277	def ReleaseAccess(self, req, fid):
278	# The dance to get into the request body
279	if req.has_key('ReleaseAccessRequestBody'):
280	req = req['ReleaseAccessRequestBody']
281	else:
282	raise service_error(service_error.req, "No request!?")
283
284	# Local request
285	try:
286	if req['allocID'].has_key('localname'):
287	auth_attr = aid = req['allocID']['localname']
288	elif req['allocID'].has_key('fedid'):
289	aid = unicode(req['allocID']['fedid'])
290	auth_attr = req['allocID']['fedid']
291	else:
292	raise service_error(service_error.req,
293	"Only localnames and fedids are understood")
294	except KeyError:
295	raise service_error(service_error.req, "Badly formed request")
296
297	self.log.debug("[access] deallocation requested for %s", aid)
298	if not self.auth.check_attribute(fid, auth_attr):
299	self.log.debug("[access] deallocation denied for %s", aid)
300	raise service_error(service_error.access, "Access Denied")
301
302	self.state_lock.acquire()
303	if self.allocation.has_key(aid):
304	self.log.debug("Found allocation for %s" %aid)
305	del self.allocation[aid]
306	self.write_state()
307	self.state_lock.release()
308	# And remove the access cert
309	cf = "%s/%s.pem" % (self.certdir, aid)
310	self.log.debug("Removing %s" % cf)
311	os.remove(cf)
312	return { 'allocID': req['allocID'] }
313	else:
314	self.state_lock.release()
315	raise service_error(service_error.req, "No such allocation")
316
317	def manifest_to_dict(self, manifest, ignore_debug=False):
318	"""
319	Turn the manifest into a dict were each virtual nodename (i.e. the
320	topdl name) has an entry with the allocated machine in hostname and the
321	interfaces in 'interfaces'. I love having XML parser code lying
322	around.
323	"""
324	if self.create_debug and not ignore_debug:
325	self.log.debug("Returning null manifest dict")
326	return { }
327
328	# The class allows us to keep a little state - the dict under
329	# consteruction and the current entry in that dict for the interface
330	# element code.
331	class manifest_parser:
332	def __init__(self):
333	self.d = { }
334	self.current_key=None
335
336	# If the element is a node, create a dict entry for it. If it's an
337	# interface inside a node, add an entry in the interfaces list with
338	# the virtual name and component id.
339	def start_element(self, name, attrs):
340	if name == 'node':
341	self.current_key = attrs.get('virtual_id',"")
342	if self.current_key:
343	self.d[self.current_key] = {
344	'hostname': attrs.get('hostname', None),
345	'interfaces': { },
346	'mac': { }
347	}
348	elif name == 'interface' and self.current_key:
349	self.d[self.current_key]['interfaces']\
350	[attrs.get('virtual_id','')] = \
351	attrs.get('component_id', None)
352	elif name == 'interface_ref':
353	# Collect mac address information from an interface_ref.
354	# These appear after the node info has been parsed.
355	nid = attrs.get('virtual_node_id', None)
356	ifid = attrs.get('virtual_interface_id', None)
357	mac = attrs.get('MAC', None)
358	self.d[nid]['mac'][ifid] = mac
359	# When a node is finished, clear current_key
360	def end_element(self, name):
361	if name == 'node': self.current_key = None
362
363	node = { }
364
365	mp = manifest_parser()
366	p = xml.parsers.expat.ParserCreate()
367	# These are bound to the class we just created
368	p.StartElementHandler = mp.start_element
369	p.EndElementHandler = mp.end_element
370
371	p.Parse(manifest)
372	# Make the node dict that the callers expect
373	for k in mp.d:
374	node[k] = mp.d.get('hostname', '')
375	return mp.d
376
377	def fake_manifest(self, topo):
378	"""
379	Fake the output of manifest_to_dict with a bunch of generic node an
380	interface names, for debugging.
381	"""
382	node = { }
383	for i, e in enumerate([ e for e in topo.elements \
384	if isinstance(e, topdl.Computer)]):
385	node[e.name] = {
386	'hostname': "node%03d" % i,
387	'interfaces': { }
388	}
389	for j, inf in enumerate(e.interface):
390	node[e.name]['interfaces'][inf.name] = 'eth%d' % j
391
392	return node
393
394
395	def generate_portal_configs(self, topo, pubkey_base,
396	secretkey_base, tmpdir, leid, connInfo, services, nodes):
397
398	def conninfo_to_dict(key, info):
399	"""
400	Make a cpoy of the connection information about key, and flatten it
401	into a single dict by parsing out any feddAttrs.
402	"""
403
404	rv = None
405	for i in info:
406	if key == i.get('portal', "") or \
407	key in [e.get('element', "") \
408	for e in i.get('member', [])]:
409	rv = i.copy()
410	break
411
412	else:
413	return rv
414
415	if 'fedAttr' in rv:
416	for a in rv['fedAttr']:
417	attr = a.get('attribute', "")
418	val = a.get('value', "")
419	if attr and attr not in rv:
420	rv[attr] = val
421	del rv['fedAttr']
422	return rv
423
424	# XXX: un hardcode this
425	def client_null(f, s):
426	print >>f, "Service: %s" % s['name']
427
428	def client_seer_master(f, s):
429	print >>f, 'PortalAlias: seer-master'
430
431	def client_smb(f, s):
432	print >>f, "Service: %s" % s['name']
433	smbshare = None
434	smbuser = None
435	smbproj = None
436	for a in s.get('fedAttr', []):
437	if a.get('attribute', '') == 'SMBSHARE':
438	smbshare = a.get('value', None)
439	elif a.get('attribute', '') == 'SMBUSER':
440	smbuser = a.get('value', None)
441	elif a.get('attribute', '') == 'SMBPROJ':
442	smbproj = a.get('value', None)
443
444	if all((smbshare, smbuser, smbproj)):
445	print >>f, "SMBshare: %s" % smbshare
446	print >>f, "ProjectUser: %s" % smbuser
447	print >>f, "ProjectName: %s" % smbproj
448
449	def client_hide_hosts(f, s):
450	for a in s.get('fedAttr', [ ]):
451	if a.get('attribute', "") == 'hosts':
452	print >>f, 'Hide: %s' % a.get('value', "")
453
454	client_service_out = {
455	'SMB': client_smb,
456	'tmcd': client_null,
457	'seer': client_null,
458	'userconfig': client_null,
459	'project_export': client_null,
460	'seer_master': client_seer_master,
461	'hide_hosts': client_hide_hosts,
462	}
463
464	def client_seer_master_export(f, s):
465	print >>f, "AddedNode: seer-master"
466
467	def client_seer_local_export(f, s):
468	print >>f, "AddedNode: control"
469
470	client_export_service_out = {
471	'seer_master': client_seer_master_export,
472	'local_seer_control': client_seer_local_export,
473	}
474
475	def server_port(f, s):
476	p = urlparse(s.get('server', 'http://localhost'))
477	print >>f, 'port: remote:%s:%s:%s' % (p.port, p.hostname, p.port)
478
479	def server_null(f,s): pass
480
481	def server_seer(f, s):
482	print >>f, 'seer: true'
483
484	server_service_out = {
485	'SMB': server_port,
486	'tmcd': server_port,
487	'userconfig': server_null,
488	'project_export': server_null,
489	'seer': server_seer,
490	'seer_master': server_port,
491	'hide_hosts': server_null,
492	}
493	# XXX: end un hardcode this
494
495
496	seer_out = False
497	client_out = False
498	for e in [ e for e in topo.elements \
499	if isinstance(e, topdl.Computer) and e.get_attribute('portal')]:
500	myname = e.name
501	type = e.get_attribute('portal_type')
502
503	info = conninfo_to_dict(myname, connInfo)
504
505	if not info:
506	raise service_error(service_error.req,
507	"No connectivity info for %s" % myname)
508
509	# Translate to physical name (ProtoGENI doesn't have DNS)
510	physname = nodes.get(myname, { }).get('hostname', None)
511	peer = info.get('peer', "")
512	ldomain = self.domain
513	ssh_port = info.get('ssh_port', 22)
514
515	# Collect this for the client.conf file
516	if 'masterexperiment' in info:
517	mproj, meid = info['masterexperiment'].split("/", 1)
518
519	active = info.get('active', 'False')
520
521	if type in ('control', 'both'):
522	testbed = e.get_attribute('testbed')
523	control_gw = myname
524
525	cfn = "%s/%s.gw.conf" % (tmpdir, myname.lower())
526	tunnelconfig = self.tunnel_config
527	try:
528	f = open(cfn, "w")
529	if active == 'True':
530	print >>f, "active: True"
531	print >>f, "ssh_port: %s" % ssh_port
532	if type in ('control', 'both'):
533	for s in [s for s in services \
534	if s.get('name', "") in self.imports]:
535	server_service_out[s['name']](f, s)
536
537	if tunnelconfig:
538	print >>f, "tunnelip: %s" % tunnelconfig
539	print >>f, "peer: %s" % peer.lower()
540	print >>f, "ssh_pubkey: /usr/local/federation/etc/%s" % \
541	pubkey_base
542	print >>f, "ssh_privkey: /usr/local/federation/etc/%s" % \
543	secretkey_base
544	f.close()
545	except EnvironmentError, e:
546	raise service_error(service_error.internal,
547	"Can't write protal config %s: %s" % (cfn, e))
548
549	# Done with portals, write the client config file.
550	try:
551	f = open("%s/client.conf" % tmpdir, "w")
552	if control_gw:
553	print >>f, "ControlGateway: %s" % physname.lower()
554	for s in services:
555	if s.get('name',"") in self.imports and \
556	s.get('visibility','') == 'import':
557	client_service_out[s['name']](f, s)
558	if s.get('name', '') in self.exports and \
559	s.get('visibility', '') == 'export' and \
560	s['name'] in client_export_service_out:
561	client_export_service_out[s['name']](f, s)
562	# Seer uses this.
563	if mproj and meid:
564	print >>f, "ExperimentID: %s/%s" % (mproj, meid)
565	f.close()
566	except EnvironmentError, e:
567	raise service_error(service_error.internal,
568	"Cannot write client.conf: %s" %s)
569
570
571
572	def export_store_info(self, cf, nodes, ssh_port, connInfo):
573	"""
574	For the export requests in the connection info, install the peer names
575	at the experiment controller via SetValue calls.
576	"""
577
578	for c in connInfo:
579	for p in [ p for p in c.get('parameter', []) \
580	if p.get('type', '') == 'output']:
581
582	if p.get('name', '') == 'peer':
583	k = p.get('key', None)
584	surl = p.get('store', None)
585	if surl and k and k.index('/') != -1:
586	if self.create_debug:
587	req = { 'name': k, 'value': 'debug' }
588	self.call_SetValue(surl, req, cf)
589	else:
590	n = nodes.get(k[k.index('/')+1:], { })
591	value = n.get('hostname', None)
592	if value:
593	req = { 'name': k, 'value': value }
594	self.call_SetValue(surl, req, cf)
595	else:
596	self.log.error("No hostname for %s" % \
597	k[k.index('/'):])
598	else:
599	self.log.error("Bad export request: %s" % p)
600	elif p.get('name', '') == 'ssh_port':
601	k = p.get('key', None)
602	surl = p.get('store', None)
603	if surl and k:
604	req = { 'name': k, 'value': ssh_port }
605	self.call_SetValue(surl, req, cf)
606	else:
607	self.log.error("Bad export request: %s" % p)
608	else:
609
610	self.log.error("Unknown export parameter: %s" % \
611	p.get('name'))
612	continue
613
614	def write_node_config_script(self, elem, node, user, pubkey,
615	secretkey, stagingdir, tmpdir):
616	"""
617	Write out the configuration script that is to run on the node
618	represented by elem in the topology. This is called
619	once per node to configure.
620	"""
621	# These little functions/functors just make things more readable. Each
622	# one encapsulates a small task of copying software files or installing
623	# them.
624	class stage_file_type:
625	"""
626	Write code copying file sfrom the staging host to the host on which
627	this will run.
628	"""
629	def __init__(self, user, host, stagingdir):
630	self.user = user
631	self.host = host
632	self.stagingdir = stagingdir
633	self.scp = "/usr/bin/scp -i .ssh/id_rsa -o " + \
634	"'ForwardX11 no' -o 'StrictHostKeyChecking no' "
635
636	def __call__(self, script, file, dest="."):
637	# If the file is a full pathname, do not use stagingdir
638	if file.find('/') == -1:
639	file = "%s/%s" % (self.stagingdir, file)
640	print >>script, "%s %s@%s:%s %s" % \
641	(self.scp, self.user, self.host, file, dest)
642
643	def install_tar(script, loc, base):
644	"""
645	Print code to script to install a tarfile in loc.
646	"""
647	tar = "/bin/tar"
648	mkdir="/bin/mkdir"
649
650	print >>script, "%s -p %s" % (mkdir, loc)
651	print >>script, "%s -C %s -xzf %s" % (tar, loc, base)
652
653	def install_rpm(script, base):
654	"""
655	Print code to script to install an rpm
656	"""
657	rpm = "/bin/rpm"
658	print >>script, "%s --install %s" % (rpm, base)
659
660	ifconfig = "/sbin/ifconfig"
661	findif = '/usr/local/etc/emulab/findif'
662	stage_file = stage_file_type(user, self.staging_host, stagingdir)
663	pname = node.get('hostname', None)
664	fed_dir = "/usr/local/federation"
665	fed_etc_dir = "%s/etc" % fed_dir
666	fed_bin_dir = "%s/bin" % fed_dir
667	fed_lib_dir = "%s/lib" % fed_dir
668
669	if pname:
670	sfile = "%s/%s.startup" % (tmpdir, pname)
671	script = open(sfile, "w")
672	# Reset the interfaces to the ones in the topo file
673	for i in [ i for i in elem.interface \
674	if not i.get_attribute('portal')]:
675	pinf = node['interfaces'].get(i.name, None)
676	pmac = node['mac'].get(i.name, None)
677	addr = i.get_attribute('ip4_address')
678	netmask = i.get_attribute('ip4_netmask') or '255.255.255.0'
679	# The interface names in manifests are not to be trusted, so we
680	# find the interface to configure using the local node's script
681	# to match mac address to interface name.
682	if pinf and addr and pmac:
683	print >>script, '# %s' % pinf
684	print >>script, \
685	"%s `%s %s` %s netmask %s" % \
686	(ifconfig, findif, pmac, addr, netmask)
687	else:
688	self.log.error("Missing interface or address for %s" \
689	% i.name)
690
691	for l, f in self.federation_software:
692	base = os.path.basename(f)
693	stage_file(script, base)
694	if l: install_tar(script, l, base)
695	else: install_rpm(script, base)
696
697	for s in elem.software:
698	s_base = s.location.rpartition('/')[2]
699	stage_file(script, s_base)
700	if s.install: install_tar(script, s.install, s_base)
701	else: install_rpm(script, s_base)
702
703	for f in ('hosts', pubkey, secretkey, 'client.conf',
704	'userconf'):
705	stage_file(script, f, fed_etc_dir)
706	if self.sshd:
707	stage_file(script, self.sshd, fed_bin_dir)
708	if self.sshd_config:
709	stage_file(script, self.sshd_config, fed_etc_dir)
710
711	# Look in tmpdir to get the names. They've all been copied
712	# into the (remote) staging dir
713	if os.access("%s/%s.gw.conf" % (tmpdir, elem.name), os.R_OK):
714	stage_file(script, "%s.gw.conf" % elem.name, fed_etc_dir)
715
716	# Done with staging, remove the identity used to stage
717	print >>script, "#/bin/rm .ssh/id_rsa"
718
719	# Start commands
720	if elem.get_attribute('portal') and self.portal_startcommand:
721	# Install portal software
722	for l, f in self.portal_software:
723	base = os.path.basename(f)
724	stage_file(script, base)
725	if l: install_tar(script, l, base)
726	else: install_rpm(script, base)
727
728	# Portals never have a user-specified start command
729	print >>script, self.portal_startcommand
730	elif self.node_startcommand:
731	# XXX: debug
732	print >>script, "sudo perl -I%s %s/import_key.pl /users/%s/.ssh/authorized_keys /root/.ssh/authorized_keys" % (fed_lib_dir, fed_bin_dir, user)
733	# XXX: debug
734	if elem.get_attribute('startup'):
735	print >>script, "%s \\$USER '%s'" % \
736	(self.node_startcommand,
737	elem.get_attribute('startup'))
738	else:
739	print >>script, self.node_startcommand
740	script.close()
741	return sfile, pname
742	else:
743	return None, None
744
745
746	def configure_nodes(self, segment_commands, topo, nodes, user,
747	pubkey, secretkey, stagingdir, tmpdir):
748	"""
749	For each node in the topology, generate a script file that copies
750	software onto it and installs it in the proper places and then runs the
751	startup command (including the federation commands.
752	"""
753
754
755
756	for e in [ e for e in topo.elements if isinstance(e, topdl.Computer)]:
757	vname = e.name
758	sfile, pname = self.write_node_config_script(e,
759	nodes.get(vname, { }),
760	user, pubkey, secretkey, stagingdir, tmpdir)
761	if sfile:
762	if not segment_commands.scp_file(sfile, user, pname):
763	self.log.error("Could not copy script to %s" % pname)
764	else:
765	self.log.error("Unmapped node: %s" % vname)
766
767	def start_node(self, user, host, node, segment_commands):
768	"""
769	Copy an identity to a node for the configuration script to be able to
770	import data and then run the startup script remotely.
771	"""
772	# Place an identity on the node so that the copying can succeed
773	segment_commands.scp_file( segment_commands.ssh_privkey_file,
774	user, node, ".ssh/id_rsa")
775	segment_commands.ssh_cmd(user, node,
776	"sudo /bin/sh ./%s.startup &" % node)
777
778	def start_nodes(self, user, host, nodes, segment_commands):
779	"""
780	Start a thread to initialize each node and wait for them to complete.
781	Each thread runs start_node.
782	"""
783	threads = [ ]
784	for n in nodes:
785	t = Thread(target=self.start_node, args=(user, host, n,
786	segment_commands))
787	t.start()
788	threads.append(t)
789
790	done = [not t.isAlive() for t in threads]
791	while not all(done):
792	self.log.info("Waiting for threads %s" % done)
793	time.sleep(10)
794	done = [not t.isAlive() for t in threads]
795
796	def set_up_staging_filespace(self, segment_commands, user, host,
797	stagingdir):
798	"""
799	Set up teh staging area on the staging machine. To reduce the number
800	of ssh commands, we compose a script and execute it remotely.
801	"""
802
803	self.log.info("[start_segment]: creating script file")
804	try:
805	sf, scriptname = tempfile.mkstemp()
806	scriptfile = os.fdopen(sf, 'w')
807	except EnvironmentError:
808	return False
809
810	scriptbase = os.path.basename(scriptname)
811
812	# Script the filesystem changes
813	print >>scriptfile, "/bin/rm -rf %s" % stagingdir
814	print >>scriptfile, 'mkdir -p %s' % stagingdir
815	print >>scriptfile, "rm -f %s" % scriptbase
816	scriptfile.close()
817
818	# Move the script to the remote machine
819	# XXX: could collide tempfile names on the remote host
820	if segment_commands.scp_file(scriptname, user, host, scriptbase):
821	os.remove(scriptname)
822	else:
823	return False
824
825	# Execute the script (and the script's last line deletes it)
826	if not segment_commands.ssh_cmd(user, host, "sh -x %s" % scriptbase):
827	return False
828
829	def initialize_protogeni_context(self, segment_commands, certfile, certpw):
830	"""
831	Protogeni interactions take a context and a protogeni certificate.
832	This establishes both for later calls and returns them.
833	"""
834	if os.access(certfile, os.R_OK):
835	ctxt = fedd_ssl_context(my_cert=certfile, password=certpw)
836	else:
837	self.log.error("[start_segment]: Cannot read certfile: %s" % \
838	certfile)
839	return None, None
840
841	try:
842	gcred = segment_commands.slice_authority_call('GetCredential',
843	{}, ctxt)
844	except segment_commands.ProtoGENIError, e:
845	raise service_error(service_error.federant,
846	"ProtoGENI: %s" % e)
847
848	return ctxt, gcred
849
850	def get_free_slicename(self, segment_commands, user, gcred, ctxt):
851	"""
852	Find a usable slice name by trying random ones until there's no
853	collision.
854	"""
855
856	def random_slicename(user):
857	"""
858	Return a random slicename by appending 5 letters to the username.
859	"""
860	slicename = user
861	for i in range(0,5):
862	slicename += random.choice(string.ascii_letters)
863	return slicename
864
865	while True:
866	slicename = random_slicename(user)
867	try:
868	param = {
869	'credential': gcred,
870	'hrn': slicename,
871	'type': 'Slice'
872	}
873	segment_commands.slice_authority_call('Resolve', param, ctxt)
874	except segment_commands.ProtoGENIError, e:
875	print e
876	break
877
878	return slicename
879
880	def allocate_slice(self, segment_commands, slicename, rspec, gcred, ctxt):
881	"""
882	Create the slice and allocate resources. If any of this stuff fails,
883	the allocations will time out on PG in short order, so we just raise
884	the service_error. Return the slice and sliver credentials as well as
885	the manifest.
886	"""
887	try:
888	param = {
889	'credential': gcred,
890	'hrn': slicename,
891	'type': 'Slice'
892	}
893	slice_cred = segment_commands.slice_authority_call('Register',
894	param, ctxt)
895	# Resolve the slice to get the URN that PG has assigned it.
896	param = {
897	'credential': gcred,
898	'type': 'Slice',
899	'hrn': slicename
900	}
901	data = segment_commands.slice_authority_call('Resolve', param,
902	ctxt)
903	if 'urn' in data:
904	slice_urn = data['urn']
905	else:
906	raise service_error(service_error.federant,
907	"No URN returned for slice %s" % hrn)
908
909	if 'creator_urn' in data:
910	creator_urn = data['creator_urn']
911	else:
912	raise service_error(service_error.federant,
913	"No creator URN returned for slice %s" % hrn)
914	# Populate the ssh keys (let PG format them)
915	param = {
916	'credential': gcred,
917	}
918	keys = segment_commands.slice_authority_call('GetKeys', param,
919	ctxt)
920	# Create a Sliver
921	param = {
922	'credentials': [ slice_cred ],
923	'rspec': rspec,
924	'users': [ {
925	'urn': creator_urn,
926	'keys': keys,
927	},
928	],
929	'slice_urn': slice_urn,
930	}
931	rv = segment_commands.component_manager_call(
932	'CreateSliver', param, ctxt)
933
934	# the GENIAPI AM just hands back the manifest, bit the ProtoGENI
935	# API hands back a sliver credential. This just finds the format
936	# of choice.
937	if isinstance(rv, tuple):
938	manifest = rv[1]
939	else:
940	manifest = rv
941	except segment_commands.ProtoGENIError, e:
942	raise service_error(service_error.federant,
943	"ProtoGENI: %s %s" % (e.code, e))
944
945	return (slice_urn, slice_cred, manifest, rspec)
946
947	def wait_for_slice(self, segment_commands, slice_cred, slice_urn, ctxt,
948	timeout=None):
949	"""
950	Wait for the given slice to finish its startup. Return the final
951	status.
952	"""
953	completed_states = ('failed', 'ready')
954	status = 'changing'
955	if timeout is not None:
956	end = time.time() + timeout
957	try:
958	while status not in completed_states:
959	param = {
960	'credentials': [ slice_cred ],
961	'slice_urn': slice_urn,
962	}
963	r = segment_commands.component_manager_call(
964	'SliverStatus', param, ctxt)
965	# GENIAPI uses geni_status as the key, so check for both
966	status = r.get('status', r.get('geni_status','changing'))
967	if status not in completed_states:
968	if timeout is not None and time.time() > end:
969	return 'timeout'
970	time.sleep(30)
971	except segment_commands.ProtoGENIError, e:
972	raise service_error(service_error.federant,
973	"ProtoGENI: %s %s" % (e.code, e))
974
975	return status
976
977	def delete_slice(self, segment_commands, slice_cred, slice_urn, ctxt):
978	"""
979	Delete the slice resources. An error from the service is ignores,
980	because the soft state will go away anyway.
981	"""
982	try:
983	param = {
984	'credentials': [ slice_cred, ],
985	'slice_urn': slice_urn,
986	}
987	segment_commands.component_manager_call('DeleteSlice',
988	param, ctxt)
989	except segment_commands.ProtoGENIError, e:
990	self.log.warn("ProtoGENI: %s" % e)
991
992
993
994	def start_segment(self, segment_commands, aid, user, rspec, pubkey,
995	secretkey, ename, stagingdir, tmpdir, certfile, certpw,
996	export_certfile, topo, connInfo, services, timeout=0):
997	"""
998	Start a sub-experiment on a federant.
999
1000	Get the current state, modify or create as appropriate, ship data
1001	and configs and start the experiment. There are small ordering
1002	differences based on the initial state of the sub-experiment.
1003	"""
1004
1005	# Local software dir
1006	lsoftdir = "%s/software" % tmpdir
1007	host = self.staging_host
1008
1009	ctxt, gcred = self.initialize_protogeni_context(segment_commands,
1010	certfile, certpw)
1011
1012	if not ctxt: return False, {}
1013
1014	self.set_up_staging_filespace(segment_commands, user, host, stagingdir)
1015	slicename = self.get_free_slicename(segment_commands, user, gcred, ctxt)
1016	self.log.info("Creating %s" % slicename)
1017	slice_urn, slice_cred, manifest, rpsec = self.allocate_slice(
1018	segment_commands, slicename, rspec, gcred, ctxt)
1019
1020	# With manifest in hand, we can export the portal node names.
1021	if self.create_debug: nodes = self.fake_manifest(topo)
1022	else: nodes = self.manifest_to_dict(manifest)
1023
1024	self.export_store_info(export_certfile, nodes, self.ssh_port,
1025	connInfo)
1026	self.generate_portal_configs(topo, pubkey, secretkey, tmpdir,
1027	ename, connInfo, services, nodes)
1028
1029	# Copy software to the staging machine (done after generation to copy
1030	# those, too)
1031	for d in (tmpdir, lsoftdir):
1032	if os.path.isdir(d):
1033	for f in os.listdir(d):
1034	if not os.path.isdir("%s/%s" % (d, f)):
1035	if not segment_commands.scp_file("%s/%s" % (d, f),
1036	user, host, "%s/%s" % (stagingdir, f)):
1037	self.log.error("Scp failed")
1038	return False, {}
1039
1040
1041	# Now we wait for the nodes to start on PG
1042	status = self.wait_for_slice(segment_commands, slice_cred, slice_urn,
1043	ctxt, timeout=300)
1044	if status == 'failed':
1045	self.log.error('Sliver failed to start on ProtoGENI')
1046	self.delete_slice(segment_commands, slice_cred, slice_urn, ctxt)
1047	return False, {}
1048	elif status == 'timeout':
1049	self.log.error('Sliver failed to start on ProtoGENI (timeout)')
1050	self.delete_slice(segment_commands, slice_cred, slice_urn, ctxt)
1051	return False, {}
1052	else:
1053	# All good: save ProtoGENI info in shared state
1054	self.state_lock.acquire()
1055	self.allocation[aid]['slice_urn'] = slice_urn
1056	self.allocation[aid]['slice_name'] = slicename
1057	self.allocation[aid]['slice_credential'] = slice_cred
1058	self.allocation[aid]['manifest'] = manifest
1059	self.allocation[aid]['rspec'] = rspec
1060	self.allocation[aid]['certfile'] = certfile
1061	self.allocation[aid]['certpw'] = certpw
1062	self.write_state()
1063	self.state_lock.release()
1064
1065	# Now we have configuration to do for ProtoGENI
1066	self.configure_nodes(segment_commands, topo, nodes, user, pubkey,
1067	secretkey, stagingdir, tmpdir)
1068
1069	self.start_nodes(user, self.staging_host,
1070	[ n.get('hostname', None) for n in nodes.values()],
1071	segment_commands)
1072
1073	# Everything has gone OK.
1074	return True, dict([(k, n.get('hostname', None)) \
1075	for k, n in nodes.items()])
1076
1077	def generate_rspec(self, topo, softdir, connInfo):
1078
1079	# Force a useful image. Without picking this the nodes can get
1080	# different images and there is great pain.
1081	def image_filter(e):
1082	if isinstance(e, topdl.Computer):
1083	return '<disk_image name="urn:publicid:IDN+emulab.net+' + \
1084	'image+emulab-ops//FEDORA10-STD" />'
1085	else:
1086	return ""
1087	# Main line of generate
1088	t = topo.clone()
1089
1090	starts = { }
1091	# Weed out the things we aren't going to instantiate: Segments, portal
1092	# substrates, and portal interfaces. (The copy in the for loop allows
1093	# us to delete from e.elements in side the for loop). While we're
1094	# touching all the elements, we also adjust paths from the original
1095	# testbed to local testbed paths and put the federation commands and
1096	# startcommands into a dict so we can start them manually later.
1097	# ProtoGENI requires setup before the federation commands run, so we
1098	# run them by hand after we've seeded configurations.
1099	for e in [e for e in t.elements]:
1100	if isinstance(e, topdl.Segment):
1101	t.elements.remove(e)
1102	# Fix software paths
1103	for s in getattr(e, 'software', []):
1104	s.location = re.sub("^.*/", softdir, s.location)
1105	if isinstance(e, topdl.Computer):
1106	if e.get_attribute('portal') and self.portal_startcommand:
1107	# Portals never have a user-specified start command
1108	starts[e.name] = self.portal_startcommand
1109	elif self.node_startcommand:
1110	if e.get_attribute('startup'):
1111	starts[e.name] = "%s \\$USER '%s'" % \
1112	(self.node_startcommand,
1113	e.get_attribute('startup'))
1114	e.remove_attribute('startup')
1115	else:
1116	starts[e.name] = self.node_startcommand
1117
1118	# Remove portal interfaces
1119	e.interface = [i for i in e.interface \
1120	if not i.get_attribute('portal')]
1121
1122	t.substrates = [ s.clone() for s in t.substrates ]
1123	t.incorporate_elements()
1124
1125	# Customize the rspec output to use the image we like
1126	filters = [ image_filter ]
1127
1128	# Convert to rspec and return it
1129	exp_rspec = topdl.topology_to_rspec(t, filters)
1130
1131	return exp_rspec
1132
1133	def retrieve_software(self, topo, certfile, softdir):
1134	"""
1135	Collect the software that nodes in the topology need loaded and stage
1136	it locally. This implies retrieving it from the experiment_controller
1137	and placing it into softdir. Certfile is used to prove that this node
1138	has access to that data (it's the allocation/segment fedid). Finally
1139	local portal and federation software is also copied to the same staging
1140	directory for simplicity - all software needed for experiment creation
1141	is in softdir.
1142	"""
1143	sw = set()
1144	for e in topo.elements:
1145	for s in getattr(e, 'software', []):
1146	sw.add(s.location)
1147	os.mkdir(softdir)
1148	for s in sw:
1149	self.log.debug("Retrieving %s" % s)
1150	try:
1151	get_url(s, certfile, softdir)
1152	except:
1153	t, v, st = sys.exc_info()
1154	raise service_error(service_error.internal,
1155	"Error retrieving %s: %s" % (s, v))
1156
1157	# Copy local portal node software to the tempdir
1158	for s in (self.portal_software, self.federation_software):
1159	for l, f in s:
1160	base = os.path.basename(f)
1161	copy_file(f, "%s/%s" % (softdir, base))
1162
1163
1164	def initialize_experiment_info(self, attrs, aid, certfile, tmpdir):
1165	"""
1166	Gather common configuration files, retrieve or create an experiment
1167	name and project name, and return the ssh_key filenames. Create an
1168	allocation log bound to the state log variable as well.
1169	"""
1170	configs = set(('hosts', 'ssh_pubkey', 'ssh_secretkey'))
1171	ename = None
1172	pubkey_base = None
1173	secretkey_base = None
1174	alloc_log = None
1175
1176	for a in attrs:
1177	if a['attribute'] in configs:
1178	try:
1179	self.log.debug("Retrieving %s" % a['value'])
1180	get_url(a['value'], certfile, tmpdir)
1181	except:
1182	t, v, st = sys.exc_info()
1183	raise service_error(service_error.internal,
1184	"Error retrieving %s: %s" % (a.get('value', ""), v))
1185	if a['attribute'] == 'ssh_pubkey':
1186	pubkey_base = a['value'].rpartition('/')[2]
1187	if a['attribute'] == 'ssh_secretkey':
1188	secretkey_base = a['value'].rpartition('/')[2]
1189	if a['attribute'] == 'experiment_name':
1190	ename = a['value']
1191
1192	if not ename:
1193	ename = ""
1194	for i in range(0,5):
1195	ename += random.choice(string.ascii_letters)
1196	self.log.warn("No experiment name: picked one randomly: %s" \
1197	% ename)
1198
1199	self.state_lock.acquire()
1200	if self.allocation.has_key(aid):
1201	cf, user, ssh_key, cpw = self.allocation[aid]['credentials']
1202	self.allocation[aid]['experiment'] = ename
1203	self.allocation[aid]['log'] = [ ]
1204	# Create a logger that logs to the experiment's state object as
1205	# well as to the main log file.
1206	alloc_log = logging.getLogger('fedd.access.%s' % ename)
1207	h = logging.StreamHandler(
1208	list_log.list_log(self.allocation[aid]['log']))
1209	# XXX: there should be a global one of these rather than
1210	# repeating the code.
1211	h.setFormatter(logging.Formatter(
1212	"%(asctime)s %(name)s %(message)s",
1213	'%d %b %y %H:%M:%S'))
1214	alloc_log.addHandler(h)
1215	self.write_state()
1216	else:
1217	self.log.error("No allocation for %s!?" % aid)
1218	self.state_lock.release()
1219
1220	return (ename, pubkey_base, secretkey_base, cf, user, ssh_key,
1221	cpw, alloc_log)
1222
1223	def finalize_experiment(self, topo, nodes, aid, alloc_id):
1224	# Copy the assigned names into the return topology
1225	rvtopo = topo.clone()
1226	embedding = [ ]
1227	for k, n in nodes.items():
1228	embedding.append({
1229	'toponame': k,
1230	'physname': [n ],
1231	})
1232	# Grab the log (this is some anal locking, but better safe than
1233	# sorry)
1234	self.state_lock.acquire()
1235	logv = "".join(self.allocation[aid]['log'])
1236	# It's possible that the StartSegment call gets retried (!).
1237	# if the 'started' key is in the allocation, we'll return it rather
1238	# than redo the setup.
1239	self.allocation[aid]['started'] = {
1240	'allocID': alloc_id,
1241	'allocationLog': logv,
1242	'segmentdescription': {
1243	'topdldescription': rvtopo.to_dict() },
1244	'embedding': embedding,
1245	}
1246	retval = copy.deepcopy(self.allocation[aid]['started'])
1247	self.write_state()
1248	self.state_lock.release()
1249
1250	return retval
1251
1252	def StartSegment(self, req, fid):
1253	err = None # Any service_error generated after tmpdir is created
1254	rv = None # Return value from segment creation
1255
1256	try:
1257	req = req['StartSegmentRequestBody']
1258	topref = req['segmentdescription']['topdldescription']
1259	except KeyError:
1260	raise service_error(service_error.req, "Badly formed request")
1261
1262	connInfo = req.get('connection', [])
1263	services = req.get('service', [])
1264	auth_attr = req['allocID']['fedid']
1265	aid = "%s" % auth_attr
1266	attrs = req.get('fedAttr', [])
1267	if not self.auth.check_attribute(fid, auth_attr):
1268	raise service_error(service_error.access, "Access denied")
1269	else:
1270	# See if this is a replay of an earlier succeeded StartSegment -
1271	# sometimes SSL kills 'em. If so, replay the response rather than
1272	# redoing the allocation.
1273	self.state_lock.acquire()
1274	retval = self.allocation[aid].get('started', None)
1275	self.state_lock.release()
1276	if retval:
1277	self.log.warning("Duplicate StartSegment for %s: " % aid + \
1278	"replaying response")
1279	return retval
1280
1281	if topref:
1282	topo = topdl.Topology(**topref)
1283	else:
1284	raise service_error(service_error.req,
1285	"Request missing segmentdescription'")
1286
1287	certfile = "%s/%s.pem" % (self.certdir, auth_attr)
1288	try:
1289	tmpdir = tempfile.mkdtemp(prefix="access-")
1290	softdir = "%s/software" % tmpdir
1291	except EnvironmentError:
1292	raise service_error(service_error.internal, "Cannot create tmp dir")
1293
1294	# Try block alllows us to clean up temporary files.
1295	try:
1296	self.retrieve_software(topo, certfile, softdir)
1297	self.configure_userconf(services, tmpdir)
1298	ename, pubkey_base, secretkey_base, cf, user, ssh_key, \
1299	cpw, alloc_log = self.initialize_experiment_info(attrs,
1300	aid, certfile, tmpdir)
1301	self.import_store_info(certfile, connInfo)
1302	rspec = self.generate_rspec(topo, "%s/%s/" \
1303	% (self.staging_dir, ename), connInfo)
1304
1305	segment_commands = self.api_proxy(keyfile=ssh_key,
1306	debug=self.create_debug, log=alloc_log,
1307	ch_url = self.ch_url, sa_url=self.sa_url,
1308	cm_url=self.cm_url)
1309	rv, nodes = self.start_segment(segment_commands, aid, user, rspec,
1310	pubkey_base,
1311	secretkey_base, ename,
1312	"%s/%s" % (self.staging_dir, ename), tmpdir, cf, cpw,
1313	certfile, topo, connInfo, services)
1314	except EnvironmentError, e:
1315	err = service_error(service_error.internal, "%s" % e)
1316	except service_error, e:
1317	err = e
1318	except:
1319	t, v, st = sys.exc_info()
1320	err = service_error(service_error.internal, "%s: %s" % \
1321	(v, traceback.extract_tb(st)))
1322
1323	# Walk up tmpdir, deleting as we go
1324	if self.cleanup: self.remove_dirs(tmpdir)
1325	else: self.log.debug("[StartSegment]: not removing %s" % tmpdir)
1326
1327	if rv:
1328	return self.finalize_experiment(topo, nodes, aid, req['allocID'])
1329	elif err:
1330	raise service_error(service_error.federant,
1331	"Swapin failed: %s" % err)
1332	else:
1333	raise service_error(service_error.federant, "Swapin failed")
1334
1335	def stop_segment(self, segment_commands, user, stagingdir, slice_cred,
1336	slice_urn, certfile, certpw):
1337	"""
1338	Stop a sub experiment by calling swapexp on the federant
1339	"""
1340	host = self.staging_host
1341	rv = False
1342	try:
1343	# Clean out tar files: we've gone over quota in the past
1344	if stagingdir:
1345	segment_commands.ssh_cmd(user, host, "rm -rf %s" % stagingdir)
1346	if slice_cred:
1347	self.log.error('Removing Sliver on ProtoGENI')
1348	ctxt = fedd_ssl_context(my_cert=certfile, password=certpw)
1349	self.delete_slice(segment_commands, slice_cred, slice_urn, ctxt)
1350	return True
1351	except self.ssh_cmd_timeout:
1352	rv = False
1353	return rv
1354
1355	def TerminateSegment(self, req, fid):
1356	try:
1357	req = req['TerminateSegmentRequestBody']
1358	except KeyError:
1359	raise service_error(service_error.req, "Badly formed request")
1360
1361	auth_attr = req['allocID']['fedid']
1362	aid = "%s" % auth_attr
1363	attrs = req.get('fedAttr', [])
1364	if not self.auth.check_attribute(fid, auth_attr):
1365	raise service_error(service_error.access, "Access denied")
1366
1367	self.state_lock.acquire()
1368	if self.allocation.has_key(aid):
1369	cf, user, ssh_key, cpw = self.allocation[aid]['credentials']
1370	slice_cred = self.allocation[aid].get('slice_credential', None)
1371	slice_urn = self.allocation[aid].get('slice_urn', None)
1372	ename = self.allocation[aid].get('experiment', None)
1373	else:
1374	cf, user, ssh_key, cpw = (None, None, None, None)
1375	slice_cred = None
1376	slice_urn = None
1377	ename = None
1378	self.state_lock.release()
1379
1380	if ename:
1381	staging = "%s/%s" % ( self.staging_dir, ename)
1382	else:
1383	self.log.warn("Can't find experiment name for %s" % aid)
1384	staging = None
1385
1386	segment_commands = self.api_proxy(keyfile=ssh_key,
1387	debug=self.create_debug, ch_url = self.ch_url,
1388	sa_url=self.sa_url, cm_url=self.cm_url)
1389	self.stop_segment(segment_commands, user, staging, slice_cred,
1390	slice_urn, cf, cpw)
1391	return { 'allocID': req['allocID'] }
1392
1393	def renew_segment(self, segment_commands, name, scred, slice_urn, interval,
1394	certfile, certpw):
1395	"""
1396	Linear code through the segment renewal calls.
1397	"""
1398	ctxt = fedd_ssl_context(my_cert=certfile, password=certpw)
1399	try:
1400	expiration = time.strftime("%Y%m%dT%H:%M:%S",
1401	time.gmtime(time.time() + interval))
1402	cred = segment_commands.slice_authority_call('GetCredential',
1403	{}, ctxt)
1404
1405	param = {
1406	'credential': scred,
1407	'expiration': expiration
1408	}
1409	r = segment_commands.slice_authority_call('RenewSlice', param, ctxt)
1410	param = {
1411	'credential': cred,
1412	'urn': slice_urn,
1413	'type': 'Slice',
1414	}
1415	new_scred = segment_commands.slice_authority_call('GetCredential',
1416	param, ctxt)
1417
1418	except segment_commands.ProtoGENIError, e:
1419	self.log.error("Failed to extend slice %s: %s" % (name, e))
1420	return None
1421	try:
1422	param = {
1423	'credentials': [new_scred,],
1424	'slice_urn': slice_urn,
1425	}
1426	r = segment_commands.component_manager_call('RenewSlice', param,
1427	ctxt)
1428	except segment_commands.ProtoGENIError, e:
1429	self.log.warn("Failed to renew sliver for %s: %s" % (name, e))
1430
1431	return new_scred
1432
1433
1434	def RenewSlices(self):
1435	self.log.info("Scanning for slices to renew")
1436	self.state_lock.acquire()
1437	aids = self.allocation.keys()
1438	self.state_lock.release()
1439
1440	for aid in aids:
1441	self.state_lock.acquire()
1442	if self.allocation.has_key(aid):
1443	name = self.allocation[aid].get('slice_name', None)
1444	scred = self.allocation[aid].get('slice_credential', None)
1445	slice_urn = self.allocation[aid].get('slice_urn', None)
1446	cf, user, ssh_key, cpw = self.allocation[aid]['credentials']
1447	else:
1448	name = None
1449	scred = None
1450	self.state_lock.release()
1451
1452	if not os.access(cf, os.R_OK):
1453	self.log.error(
1454	"[RenewSlices] cred.file %s unreadable, ignoring" % cf)
1455	continue
1456
1457	# There's a ProtoGENI slice associated with the segment; renew it.
1458	if name and scred and slice_urn:
1459	segment_commands = self.api_proxy(log=self.log,
1460	debug=self.create_debug, keyfile=ssh_key,
1461	cm_url = self.cm_url, sa_url = self.sa_url,
1462	ch_url = self.ch_url)
1463	new_scred = self.renew_segment(segment_commands, name, scred,
1464	slice_urn, self.renewal_interval, cf, cpw)
1465	if new_scred:
1466	self.log.info("Slice %s renewed until %s GMT" % \
1467	(name, time.asctime(time.gmtime(\
1468	time.time()+self.renewal_interval))))
1469	self.state_lock.acquire()
1470	if self.allocation.has_key(aid):
1471	self.allocation[aid]['slice_credential'] = new_scred
1472	self.write_state()
1473	self.state_lock.release()
1474	else:
1475	self.log.info("Failed to renew slice %s " % name)
1476
1477	# Let's do this all again soon. (4 tries before the slices time out)
1478	t = Timer(self.renewal_interval/4, self.RenewSlices)
1479	t.start()

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