2 # NEPI, a framework to manage network experiments
3 # Copyright (C) 2013 INRIA
5 # This program is free software: you can redistribute it and/or modify
6 # it under the terms of the GNU General Public License as published by
7 # the Free Software Foundation, either version 3 of the License, or
8 # (at your option) any later version.
10 # This program is distributed in the hope that it will be useful,
11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 # GNU General Public License for more details.
15 # You should have received a copy of the GNU General Public License
16 # along with this program. If not, see <http://www.gnu.org/licenses/>.
18 # Author: Alina Quereilhac <alina.quereilhac@inria.fr>
19 # Lucia Guevgeozian <lucia.guevgeozian_odizzio@inria.fr>
21 from nepi.execution.attribute import Attribute, Flags, Types
22 from nepi.execution.resource import ResourceManager, clsinit_copy, \
23 ResourceState, reschedule_delay
24 from nepi.resources.linux.node import LinuxNode
25 from nepi.resources.planetlab.plcapi import PLCAPIFactory
26 from nepi.util.execfuncs import lexec
27 from nepi.util import sshfuncs
29 from random import randint
34 class PlanetlabNode(LinuxNode):
35 _rtype = "PlanetlabNode"
36 _help = "Controls a PlanetLab host accessible using a SSH key " \
37 "associated to a PlanetLab user account"
38 _backend = "planetlab"
40 ## XXX A.Q. This lock could use a more descriptive name and
41 # an explanatory comment
42 lock = threading.Lock()
45 def _register_attributes(cls):
46 ip = Attribute("ip", "PlanetLab host public IP address",
47 flags = Flags.ReadOnly)
49 pl_url = Attribute("plcApiUrl", "URL of PlanetLab PLCAPI host \
50 (e.g. www.planet-lab.eu or www.planet-lab.org) ",
51 default = "www.planet-lab.eu",
52 flags = Flags.Credential)
54 pl_ptn = Attribute("plcApiPattern", "PLC API service regexp pattern \
55 (e.g. https://%(hostname)s:443/PLCAPI/ ) ",
56 default = "https://%(hostname)s:443/PLCAPI/",
57 flags = Flags.ExecReadOnly)
59 pl_user = Attribute("pluser", "PlanetLab account user, as the one to \
60 authenticate in the website) ",
61 flags = Flags.Credential)
63 pl_password = Attribute("plpassword",
64 "PlanetLab account password, as \
65 the one to authenticate in the website) ",
66 flags = Flags.Credential)
68 city = Attribute("city", "Constrain location (city) during resource \
69 discovery. May use wildcards.",
72 country = Attribute("country", "Constrain location (country) during \
73 resource discovery. May use wildcards.",
76 region = Attribute("region", "Constrain location (region) during \
77 resource discovery. May use wildcards.",
80 architecture = Attribute("architecture", "Constrain architecture \
81 during resource discovery.",
82 type = Types.Enumerate,
87 operating_system = Attribute("operatingSystem", "Constrain operating \
88 system during resource discovery.",
89 type = Types.Enumerate,
97 #site = Attribute("site", "Constrain the PlanetLab site this node \
99 # type = Types.Enumerate,
103 # flags = Flags.Filter)
105 min_reliability = Attribute("minReliability", "Constrain reliability \
106 while picking PlanetLab nodes. Specifies a lower \
110 flags = Flags.Filter)
112 max_reliability = Attribute("maxReliability", "Constrain reliability \
113 while picking PlanetLab nodes. Specifies an upper \
117 flags = Flags.Filter)
119 min_bandwidth = Attribute("minBandwidth", "Constrain available \
120 bandwidth while picking PlanetLab nodes. \
121 Specifies a lower acceptable bound.",
124 flags = Flags.Filter)
126 max_bandwidth = Attribute("maxBandwidth", "Constrain available \
127 bandwidth while picking PlanetLab nodes. \
128 Specifies an upper acceptable bound.",
131 flags = Flags.Filter)
133 min_load = Attribute("minLoad", "Constrain node load average while \
134 picking PlanetLab nodes. Specifies a lower acceptable \
138 flags = Flags.Filter)
140 max_load = Attribute("maxLoad", "Constrain node load average while \
141 picking PlanetLab nodes. Specifies an upper acceptable \
145 flags = Flags.Filter)
147 min_cpu = Attribute("minCpu", "Constrain available cpu time while \
148 picking PlanetLab nodes. Specifies a lower acceptable \
152 flags = Flags.Filter)
154 max_cpu = Attribute("maxCpu", "Constrain available cpu time while \
155 picking PlanetLab nodes. Specifies an upper acceptable \
159 flags = Flags.Filter)
161 timeframe = Attribute("timeframe", "Past time period in which to check\
162 information about the node. Values are year,month, \
165 type = Types.Enumerate,
170 flags = Flags.Filter)
172 cls._register_attribute(ip)
173 cls._register_attribute(pl_url)
174 cls._register_attribute(pl_ptn)
175 cls._register_attribute(pl_user)
176 cls._register_attribute(pl_password)
177 #cls._register_attribute(site)
178 cls._register_attribute(city)
179 cls._register_attribute(country)
180 cls._register_attribute(region)
181 cls._register_attribute(architecture)
182 cls._register_attribute(operating_system)
183 cls._register_attribute(min_reliability)
184 cls._register_attribute(max_reliability)
185 cls._register_attribute(min_bandwidth)
186 cls._register_attribute(max_bandwidth)
187 cls._register_attribute(min_load)
188 cls._register_attribute(max_load)
189 cls._register_attribute(min_cpu)
190 cls._register_attribute(max_cpu)
191 cls._register_attribute(timeframe)
193 def __init__(self, ec, guid):
194 super(PlanetlabNode, self).__init__(ec, guid)
197 self._node_to_provision = None
202 pl_user = self.get("pluser")
203 pl_pass = self.get("plpassword")
204 pl_url = self.get("plcApiUrl")
205 pl_ptn = self.get("plcApiPattern")
207 self._plapi = PLCAPIFactory.get_api(pl_user, pl_pass, pl_url,
212 def do_discover(self):
214 Based on the attributes defined by the user, discover the suitable nodes
216 hostname = self._get_hostname()
217 print self.guid, hostname
219 # the user specified one particular node to be provisioned
220 # check with PLCAPI if it is alvive
221 node_id = self._query_if_alive(hostname=hostname)
222 node_id = node_id.pop()
223 print self.guid, node_id
225 # check that the node is not blacklisted or being provisioned
227 with PlanetlabNode.lock:
228 plist = self.plapi.reserved()
229 blist = self.plapi.blacklisted()
230 print self.guid,plist
231 print self.guid,blist
232 if node_id not in blist and node_id not in plist:
234 # check that is really alive, by performing ping
235 ping_ok = self._do_ping(node_id)
237 self._blacklist_node(node_id)
238 self.fail_node_not_alive(hostname)
240 self._put_node_in_provision(node_id)
241 self._node_to_provision = node_id
242 super(PlanetlabNode, self).do_discover()
245 self.fail_node_not_available(hostname)
248 # the user specifies constraints based on attributes, zero, one or
249 # more nodes can match these constraints
250 nodes = self._filter_based_on_attributes()
251 nodes_alive = self._query_if_alive(nodes)
253 # nodes that are already part of user's slice have the priority to
255 nodes_inslice = self._check_if_in_slice(nodes_alive)
256 nodes_not_inslice = list(set(nodes_alive) - set(nodes_inslice))
260 node_id = self._choose_random_node(nodes_inslice)
263 # Either there were no matching nodes in the user's slice, or
264 # the nodes in the slice were blacklisted or being provisioned
265 # by other RM. Note nodes_not_inslice is never empty
266 node_id = self._choose_random_node(nodes_not_inslice)
269 self._node_to_provision = node_id
270 super(PlanetlabNode, self).do_discover()
272 self.fail_not_enough_nodes()
274 def do_provision(self):
276 Add node to user's slice after verifing that the node is functioning
284 while not provision_ok:
285 node = self._node_to_provision
286 # Adding try catch to set hostname because sometimes MyPLC fails
287 # when trying to retrive node's hostname
289 self._set_hostname_attr(node)
291 with PlanetlabNode.lock:
292 self._blacklist_node(node)
296 self._add_node_to_slice(node)
298 # check ssh connection
300 while t < timeout and not ssh_ok:
302 cmd = 'echo \'GOOD NODE\''
303 ((out, err), proc) = self.execute(cmd)
304 if out.find("GOOD NODE") < 0:
313 # the timeout was reach without establishing ssh connection
314 # the node is blacklisted, deleted from the slice, and a new
315 # node to provision is discovered
316 with PlanetlabNode.lock:
317 self._blacklist_node(node)
318 self._delete_node_from_slice(node)
319 self.set('hostname', None)
323 # check /proc directory is mounted (ssh_ok = True)
325 cmd = 'mount |grep proc'
326 ((out, err), proc) = self.execute(cmd)
327 if out.find("/proc type proc") < 0:
328 with PlanetlabNode.lock:
329 self._blacklist_node(node)
330 self._delete_node_from_slice(node)
331 self.set('hostname', None)
338 ip = self._get_ip(node)
341 super(PlanetlabNode, self).do_provision()
343 def _filter_based_on_attributes(self):
345 Retrive the list of nodes ids that match user's constraints
348 # Map user's defined attributes with tagnames of PlanetLab
349 timeframe = self.get("timeframe")[0]
352 'country' : 'country',
354 'architecture' : 'arch',
355 'operatingSystem' : 'fcdistro',
356 #'site' : 'pldistro',
357 'minReliability' : 'reliability%s' % timeframe,
358 'maxReliability' : 'reliability%s' % timeframe,
359 'minBandwidth' : 'bw%s' % timeframe,
360 'maxBandwidth' : 'bw%s' % timeframe,
361 'minLoad' : 'load%s' % timeframe,
362 'maxLoad' : 'load%s' % timeframe,
363 'minCpu' : 'cpu%s' % timeframe,
364 'maxCpu' : 'cpu%s' % timeframe,
370 for attr_name, attr_obj in self._attrs.iteritems():
371 attr_value = self.get(attr_name)
373 if attr_value is not None and attr_obj.flags == 8 and \
374 attr_name != 'timeframe':
376 attr_tag = attr_to_tags[attr_name]
377 filters['tagname'] = attr_tag
379 # filter nodes by fixed constraints e.g. operating system
380 if not 'min' in attr_name and not 'max' in attr_name:
381 filters['value'] = attr_value
382 nodes_id = self._filter_by_fixed_attr(filters, nodes_id)
384 # filter nodes by range constraints e.g. max bandwidth
385 elif ('min' or 'max') in attr_name:
386 nodes_id = self._filter_by_range_attr(attr_name, attr_value, filters, nodes_id)
389 nodes = self.plapi.get_nodes()
391 nodes_id.append(node['node_id'])
396 def _filter_by_fixed_attr(self, filters, nodes_id):
398 Query PLCAPI for nodes ids matching fixed attributes defined by the
401 node_tags = self.plapi.get_node_tags(filters)
402 if node_tags is not None:
404 if len(nodes_id) == 0:
405 # first attribute being matched
406 for node_tag in node_tags:
407 nodes_id.append(node_tag['node_id'])
409 # remove the nodes ids that don't match the new attribute
410 # that is being match
413 for node_tag in node_tags:
414 if node_tag['node_id'] in nodes_id:
415 nodes_id_tmp.append(node_tag['node_id'])
417 if len(nodes_id_tmp):
418 nodes_id = set(nodes_id) & set(nodes_id_tmp)
420 # no node from before match the new constraint
421 self.fail_discovery()
423 # no nodes match the filter applied
424 self.fail_discovery()
428 def _filter_by_range_attr(self, attr_name, attr_value, filters, nodes_id):
430 Query PLCAPI for nodes ids matching attributes defined in a certain
433 node_tags = self.plapi.get_node_tags(filters)
434 if node_tags is not None:
436 if len(nodes_id) == 0:
437 # first attribute being matched
438 for node_tag in node_tags:
440 # check that matches the min or max restriction
441 if 'min' in attr_name and node_tag['value'] != 'n/a' and \
442 float(node_tag['value']) > attr_value:
443 nodes_id.append(node_tag['node_id'])
445 elif 'max' in attr_name and node_tag['value'] != 'n/a' and \
446 float(node_tag['value']) < attr_value:
447 nodes_id.append(node_tag['node_id'])
450 # remove the nodes ids that don't match the new attribute
451 # that is being match
453 for node_tag in node_tags:
455 # check that matches the min or max restriction and was a
456 # matching previous filters
457 if 'min' in attr_name and node_tag['value'] != 'n/a' and \
458 float(node_tag['value']) > attr_value and \
459 node_tag['node_id'] in nodes_id:
460 nodes_id_tmp.append(node_tag['node_id'])
462 elif 'max' in attr_name and node_tag['value'] != 'n/a' and \
463 float(node_tag['value']) < attr_value and \
464 node_tag['node_id'] in nodes_id:
465 nodes_id_tmp.append(node_tag['node_id'])
467 if len(nodes_id_tmp):
468 nodes_id = set(nodes_id) & set(nodes_id_tmp)
470 # no node from before match the new constraint
471 self.fail_discovery()
474 # no nodes match the filter applied
475 self.fail_discovery()
479 def _query_if_alive(self, nodes_id=None, hostname=None):
481 Query PLCAPI for nodes that register activity recently, using filters
482 related to the state of the node, e.g. last time it was contacted
484 if nodes_id is None and hostname is None:
485 msg = "Specify nodes_id or hostname"
486 raise RuntimeError, msg
488 if nodes_id is not None and hostname is not None:
489 msg = "Specify either nodes_id or hostname"
490 raise RuntimeError, msg
492 # define PL filters to check the node is alive
494 filters['run_level'] = 'boot'
495 filters['boot_state'] = 'boot'
496 filters['node_type'] = 'regular'
497 #filters['>last_contact'] = int(time.time()) - 2*3600
499 # adding node_id or hostname to the filters to check for the particular
502 filters['node_id'] = list(nodes_id)
503 alive_nodes_id = self._get_nodes_id(filters)
505 filters['hostname'] = hostname
506 alive_nodes_id = self._get_nodes_id(filters)
508 if len(alive_nodes_id) == 0:
509 self.fail_node_not_alive(self, hostname)
512 for node_id in alive_nodes_id:
513 nid = node_id['node_id']
518 def _choose_random_node(self, nodes):
520 From the possible nodes for provision, choose randomly to decrese the
521 probability of different RMs choosing the same node for provision
526 index = randint(0, size)
527 node_id = nodes[index]
528 nodes[index] = nodes[size]
530 # check the node is not blacklisted or being provision by other RM
531 # and perform ping to check that is really alive
532 with PlanetlabNode.lock:
534 blist = self.plapi.blacklisted()
535 plist = self.plapi.reserved()
536 if node_id not in blist and node_id not in plist:
537 ping_ok = self._do_ping(node_id)
538 print " ### ping_ok #### %s guid %s" % (ping_ok, self.guid)
540 self._blacklist_node(node_id)
542 # discovered node for provision, added to provision list
543 self._put_node_in_provision(node_id)
544 print "node_id %s , guid %s" % (node_id, self.guid)
547 def _get_nodes_id(self, filters):
548 return self.plapi.get_nodes(filters, fields=['node_id'])
550 def _add_node_to_slice(self, node_id):
551 self.info(" Selected node to provision ")
552 slicename = self.get("username")
553 with PlanetlabNode.lock:
554 slice_nodes = self.plapi.get_slice_nodes(slicename)
555 slice_nodes.append(node_id)
556 self.plapi.add_slice_nodes(slicename, slice_nodes)
558 def _delete_node_from_slice(self, node):
559 self.warn(" Deleting node from slice ")
560 slicename = self.get("username")
561 self.plapi.delete_slice_node(slicename, [node])
563 def _get_hostname(self):
564 hostname = self.get("hostname")
569 hostname = sshfuncs.gethostbyname(ip)
574 def _set_hostname_attr(self, node):
576 Query PLCAPI for the hostname of a certain node id and sets the
577 attribute hostname, it will over write the previous value
579 hostname = self.plapi.get_nodes(node, ['hostname'])
580 self.set("hostname", hostname[0]['hostname'])
582 def _check_if_in_slice(self, nodes_id):
584 Query PLCAPI to find out if any node id from nodes_id is in the user's
587 slicename = self.get("username")
588 slice_nodes = self.plapi.get_slice_nodes(slicename)
589 nodes_inslice = list(set(nodes_id) & set(slice_nodes))
592 def _do_ping(self, node_id):
594 Perform ping command on node's IP matching node id
597 ip = self._get_ip(node_id)
598 print "ip de do_ping %s, guid %s" % (ip, self.guid)
599 if not ip: return ping_ok
601 command = "ping -c2 %s" % ip
603 (out, err) = lexec(command)
604 print "out de do_ping %s, guid %s" % (out, self.guid)
605 if not out.find("2 received") < 0:
608 print "ping_ok de do_ping %s, guid %s" % (ping_ok, self.guid)
611 def _blacklist_node(self, node):
613 Add node mal functioning node to blacklist
615 self.warn(" Blacklisting malfunctioning node ")
616 self._plapi.blacklist_host(node)
618 def _put_node_in_provision(self, node):
620 Add node to the list of nodes being provisioned, in order for other RMs
621 to not try to provision the same one again
623 self._plapi.reserve_host(node)
625 def _get_ip(self, node_id):
627 Query PLCAPI for the IP of a node with certain node id
629 hostname = self.plapi.get_nodes(node_id, ['hostname'])[0]
630 print "#### HOSTNAME ##### %s ### guid %s " % (hostname['hostname'], self.guid)
631 ip = sshfuncs.gethostbyname(hostname['hostname'])
633 # Fail while trying to find the IP
637 def fail_discovery(self):
638 msg = "Discovery failed. No candidates found for node"
640 raise RuntimeError, msg
642 def fail_node_not_alive(self, hostname=None):
643 msg = "Node %s not alive" % hostname
644 raise RuntimeError, msg
646 def fail_node_not_available(self, hostname):
647 msg = "Node %s not available for provisioning" % hostname
648 raise RuntimeError, msg
650 def fail_not_enough_nodes(self):
651 msg = "Not enough nodes available for provisioning"
652 raise RuntimeError, msg
654 def valid_connection(self, guid):