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
36 class PlanetlabNode(LinuxNode):
37 _rtype = "PlanetlabNode"
38 _help = "Controls a PlanetLab host accessible using a SSH key " \
39 "associated to a PlanetLab user account"
40 _backend = "planetlab"
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
198 self._slicenode = False
199 self._hostname = False
201 if self.get("gateway") or self.get("gatewayUser"):
202 self.set("gateway", None)
203 self.set("gatewayUser", None)
205 def _skip_provision(self):
206 pl_user = self.get("pluser")
207 pl_pass = self.get("plpassword")
208 if not pl_user and not pl_pass:
215 pl_user = self.get("pluser")
216 pl_pass = self.get("plpassword")
217 pl_url = self.get("plcApiUrl")
218 pl_ptn = self.get("plcApiPattern")
220 self._plapi = PLCAPIFactory.get_api(pl_user, pl_pass, pl_url,
228 def do_discover(self):
230 Based on the attributes defined by the user, discover the suitable
233 if self._skip_provision():
234 super(PlanetlabNode, self).do_discover()
237 hostname = self._get_hostname()
239 # the user specified one particular node to be provisioned
240 self._hostname = True
241 node_id = self._get_nodes_id({'hostname':hostname})
242 node_id = node_id.pop()['node_id']
244 # check that the node is not blacklisted or being provisioned
246 with PlanetlabNode.lock:
247 plist = self.plapi.reserved()
248 blist = self.plapi.blacklisted()
249 if node_id not in blist and node_id not in plist:
251 # check that is really alive, by performing ping
252 ping_ok = self._do_ping(node_id)
254 self._blacklist_node(node_id)
255 self.fail_node_not_alive(hostname)
257 if self._check_if_in_slice([node_id]):
258 self._slicenode = True
259 self._put_node_in_provision(node_id)
260 self._node_to_provision = node_id
262 self.fail_node_not_available(hostname)
263 super(PlanetlabNode, self).do_discover()
266 # the user specifies constraints based on attributes, zero, one or
267 # more nodes can match these constraints
268 nodes = self._filter_based_on_attributes()
270 # nodes that are already part of user's slice have the priority to
272 nodes_inslice = self._check_if_in_slice(nodes)
273 nodes_not_inslice = list(set(nodes) - set(nodes_inslice))
277 node_id = self._choose_random_node(nodes_inslice)
278 self._slicenode = True
281 # Either there were no matching nodes in the user's slice, or
282 # the nodes in the slice were blacklisted or being provisioned
283 # by other RM. Note nodes_not_inslice is never empty
284 node_id = self._choose_random_node(nodes_not_inslice)
285 self._slicenode = False
288 self._node_to_provision = node_id
290 self._set_hostname_attr(node_id)
291 self.info(" Selected node to provision ")
292 super(PlanetlabNode, self).do_discover()
294 with PlanetlabNode.lock:
295 self._blacklist_node(node_id)
298 self.fail_not_enough_nodes()
300 def do_provision(self):
302 Add node to user's slice after verifing that the node is functioning
305 if self._skip_provision():
306 super(PlanetlabNode, self).do_provision()
314 while not provision_ok:
315 node = self._node_to_provision
316 if not self._slicenode:
317 self._add_node_to_slice(node)
319 # check ssh connection
321 while t < timeout and not ssh_ok:
323 cmd = 'echo \'GOOD NODE\''
324 ((out, err), proc) = self.execute(cmd)
325 if out.find("GOOD NODE") < 0:
333 cmd = 'echo \'GOOD NODE\''
334 ((out, err), proc) = self.execute(cmd)
335 if not out.find("GOOD NODE") < 0:
339 # the timeout was reach without establishing ssh connection
340 # the node is blacklisted, deleted from the slice, and a new
341 # node to provision is discovered
342 with PlanetlabNode.lock:
343 self.warn(" Could not SSH login ")
344 self._blacklist_node(node)
345 #self._delete_node_from_slice(node)
349 # check /proc directory is mounted (ssh_ok = True)
350 # and file system is not read only
352 cmd = 'mount |grep proc'
353 ((out1, err1), proc1) = self.execute(cmd)
354 cmd = 'touch /tmp/tmpfile'
355 ((out2, err2), proc2) = self.execute(cmd)
356 if out1.find("/proc type proc") < 0 or err2.find("Read-only file system") > 0:
357 with PlanetlabNode.lock:
358 self.warn(" Corrupted file system ")
359 self._blacklist_node(node)
360 #self._delete_node_from_slice(node)
366 if not self.get('hostname'):
367 self._set_hostname_attr(node)
369 ip = self._get_ip(node)
372 super(PlanetlabNode, self).do_provision()
374 def _filter_based_on_attributes(self):
376 Retrive the list of nodes ids that match user's constraints
378 # Map user's defined attributes with tagnames of PlanetLab
379 timeframe = self.get("timeframe")[0]
382 'country' : 'country',
384 'architecture' : 'arch',
385 'operatingSystem' : 'fcdistro',
386 #'site' : 'pldistro',
387 'minReliability' : 'reliability%s' % timeframe,
388 'maxReliability' : 'reliability%s' % timeframe,
389 'minBandwidth' : 'bw%s' % timeframe,
390 'maxBandwidth' : 'bw%s' % timeframe,
391 'minLoad' : 'load%s' % timeframe,
392 'maxLoad' : 'load%s' % timeframe,
393 'minCpu' : 'cpu%s' % timeframe,
394 'maxCpu' : 'cpu%s' % timeframe,
400 for attr_name, attr_obj in self._attrs.iteritems():
401 attr_value = self.get(attr_name)
403 if attr_value is not None and attr_obj.flags == 8 and \
404 attr_name != 'timeframe':
406 attr_tag = attr_to_tags[attr_name]
407 filters['tagname'] = attr_tag
409 # filter nodes by fixed constraints e.g. operating system
410 if not 'min' in attr_name and not 'max' in attr_name:
411 filters['value'] = attr_value
412 nodes_id = self._filter_by_fixed_attr(filters, nodes_id)
414 # filter nodes by range constraints e.g. max bandwidth
415 elif ('min' or 'max') in attr_name:
416 nodes_id = self._filter_by_range_attr(attr_name, attr_value, filters, nodes_id)
419 nodes = self._get_nodes_id()
421 nodes_id.append(node['node_id'])
424 def _filter_by_fixed_attr(self, filters, nodes_id):
426 Query PLCAPI for nodes ids matching fixed attributes defined by the
429 node_tags = self.plapi.get_node_tags(filters)
430 if node_tags is not None:
432 if len(nodes_id) == 0:
433 # first attribute being matched
434 for node_tag in node_tags:
435 nodes_id.append(node_tag['node_id'])
437 # remove the nodes ids that don't match the new attribute
438 # that is being match
441 for node_tag in node_tags:
442 if node_tag['node_id'] in nodes_id:
443 nodes_id_tmp.append(node_tag['node_id'])
445 if len(nodes_id_tmp):
446 nodes_id = set(nodes_id) & set(nodes_id_tmp)
448 # no node from before match the new constraint
449 self.fail_discovery()
451 # no nodes match the filter applied
452 self.fail_discovery()
456 def _filter_by_range_attr(self, attr_name, attr_value, filters, nodes_id):
458 Query PLCAPI for nodes ids matching attributes defined in a certain
461 node_tags = self.plapi.get_node_tags(filters)
464 if len(nodes_id) == 0:
465 # first attribute being matched
466 for node_tag in node_tags:
468 # check that matches the min or max restriction
469 if 'min' in attr_name and node_tag['value'] != 'n/a' and \
470 float(node_tag['value']) > attr_value:
471 nodes_id.append(node_tag['node_id'])
473 elif 'max' in attr_name and node_tag['value'] != 'n/a' and \
474 float(node_tag['value']) < attr_value:
475 nodes_id.append(node_tag['node_id'])
478 # remove the nodes ids that don't match the new attribute
479 # that is being match
481 for node_tag in node_tags:
483 # check that matches the min or max restriction and was a
484 # matching previous filters
485 if 'min' in attr_name and node_tag['value'] != 'n/a' and \
486 float(node_tag['value']) > attr_value and \
487 node_tag['node_id'] in nodes_id:
488 nodes_id_tmp.append(node_tag['node_id'])
490 elif 'max' in attr_name and node_tag['value'] != 'n/a' and \
491 float(node_tag['value']) < attr_value and \
492 node_tag['node_id'] in nodes_id:
493 nodes_id_tmp.append(node_tag['node_id'])
495 if len(nodes_id_tmp):
496 nodes_id = set(nodes_id) & set(nodes_id_tmp)
498 # no node from before match the new constraint
499 self.fail_discovery()
502 # no nodes match the filter applied
503 self.fail_discovery()
507 def _choose_random_node(self, nodes):
509 From the possible nodes for provision, choose randomly to decrese the
510 probability of different RMs choosing the same node for provision
515 index = randint(0, size)
516 node_id = nodes[index]
517 nodes[index] = nodes[size]
519 # check the node is not blacklisted or being provision by other RM
520 # and perform ping to check that is really alive
521 with PlanetlabNode.lock:
523 blist = self.plapi.blacklisted()
524 plist = self.plapi.reserved()
525 if node_id not in blist and node_id not in plist:
526 ping_ok = self._do_ping(node_id)
528 self._set_hostname_attr(node_id)
529 self.warn(" Node not responding PING ")
530 self._blacklist_node(node_id)
532 # discovered node for provision, added to provision list
533 self._put_node_in_provision(node_id)
536 def _get_nodes_id(self, filters=None):
537 return self.plapi.get_nodes(filters, fields=['node_id'])
539 def _add_node_to_slice(self, node_id):
540 self.info(" Adding node to slice ")
541 slicename = self.get("username")
542 with PlanetlabNode.lock:
543 slice_nodes = self.plapi.get_slice_nodes(slicename)
544 slice_nodes.append(node_id)
545 self.plapi.add_slice_nodes(slicename, slice_nodes)
547 def _delete_node_from_slice(self, node):
548 self.warn(" Deleting node from slice ")
549 slicename = self.get("username")
550 self.plapi.delete_slice_node(slicename, [node])
552 def _get_hostname(self):
553 hostname = self.get("hostname")
558 hostname = socket.gethostbyaddr(ip)[0]
559 self.set('hostname', hostname)
564 def _set_hostname_attr(self, node):
566 Query PLCAPI for the hostname of a certain node id and sets the
567 attribute hostname, it will over write the previous value
569 hostname = self.plapi.get_nodes(node, ['hostname'])
570 self.set("hostname", hostname[0]['hostname'])
572 def _check_if_in_slice(self, nodes_id):
574 Query PLCAPI to find out if any node id from nodes_id is in the user's
577 slicename = self.get("username")
578 slice_nodes = self.plapi.get_slice_nodes(slicename)
579 nodes_inslice = list(set(nodes_id) & set(slice_nodes))
582 def _do_ping(self, node_id):
584 Perform ping command on node's IP matching node id
587 ip = self._get_ip(node_id)
588 if not ip: return ping_ok
590 command = ['ping', '-c4']
593 (out, err) = lexec(command)
594 if not out.find("2 received") or not out.find("3 received") or not \
595 out.find("4 received") < 0:
600 def _blacklist_node(self, node):
602 Add node mal functioning node to blacklist
604 self.warn(" Blacklisting malfunctioning node ")
605 self.plapi.blacklist_host(node)
606 if not self._hostname:
607 self.set('hostname', None)
609 def _put_node_in_provision(self, node):
611 Add node to the list of nodes being provisioned, in order for other RMs
612 to not try to provision the same one again
614 self.plapi.reserve_host(node)
616 def _get_ip(self, node_id):
618 Query PLCAPI for the IP of a node with certain node id
620 hostname = self.plapi.get_nodes(node_id, ['hostname'])[0]
622 ip = sshfuncs.gethostbyname(hostname['hostname'])
624 # Fail while trying to find the IP
628 def fail_discovery(self):
629 msg = "Discovery failed. No candidates found for node"
631 raise RuntimeError, msg
633 def fail_node_not_alive(self, hostname=None):
634 msg = "Node %s not alive" % hostname
635 raise RuntimeError, msg
637 def fail_node_not_available(self, hostname):
638 msg = "Node %s not available for provisioning" % hostname
639 raise RuntimeError, msg
641 def fail_not_enough_nodes(self):
642 msg = "Not enough nodes available for provisioning"
643 raise RuntimeError, msg
645 def fail_plapi(self):
646 msg = "Failing while trying to instanciate the PLC API.\nSet the" + \
647 " attributes pluser and plpassword."
648 raise RuntimeError, msg
650 def valid_connection(self, guid):