from nepi.execution.attribute import Attribute, Flags, Types
from nepi.execution.resource import ResourceManager, clsinit_copy, \
- ResourceState, reschedule_delay
+ ResourceState, reschedule_delay
from nepi.resources.linux.node import LinuxNode
from nepi.resources.planetlab.plcapi import PLCAPIFactory
from nepi.util.execfuncs import lexec
from random import randint
import time
import threading
+import datetime
@clsinit_copy
class PlanetlabNode(LinuxNode):
"associated to a PlanetLab user account"
_backend = "planetlab"
- ## XXX A.Q. This lock could use a more descriptive name and
- # an explanatory comment
lock = threading.Lock()
@classmethod
self._plapi = None
self._node_to_provision = None
+ self._slicenode = False
@property
def plapi(self):
self._plapi = PLCAPIFactory.get_api(pl_user, pl_pass, pl_url,
pl_ptn)
+ if not self._plapi:
+ self.fail_plapi()
+
return self._plapi
def do_discover(self):
"""
- Based on the attributes defined by the user, discover the suitable nodes
+ Based on the attributes defined by the user, discover the suitable
+ nodes for provision.
"""
hostname = self._get_hostname()
- print self.guid, hostname
if hostname:
# the user specified one particular node to be provisioned
# check with PLCAPI if it is alvive
node_id = self._query_if_alive(hostname=hostname)
node_id = node_id.pop()
- print self.guid, node_id
# check that the node is not blacklisted or being provisioned
# by other RM
with PlanetlabNode.lock:
plist = self.plapi.reserved()
blist = self.plapi.blacklisted()
- print self.guid,plist
- print self.guid,blist
if node_id not in blist and node_id not in plist:
# check that is really alive, by performing ping
self._blacklist_node(node_id)
self.fail_node_not_alive(hostname)
else:
+ if self._check_if_in_slice([node_id]):
+ self._slicenode = True
self._put_node_in_provision(node_id)
self._node_to_provision = node_id
super(PlanetlabNode, self).do_discover()
node_id = None
if nodes_inslice:
node_id = self._choose_random_node(nodes_inslice)
+ self._slicenode = True
if not node_id:
# Either there were no matching nodes in the user's slice, or
# the nodes in the slice were blacklisted or being provisioned
# by other RM. Note nodes_not_inslice is never empty
node_id = self._choose_random_node(nodes_not_inslice)
+ self._slicenode = False
if node_id:
self._node_to_provision = node_id
+ try:
+ self._set_hostname_attr(node_id)
+ self.info(" Selected node to provision ")
+ except:
+ with PlanetlabNode.lock:
+ self._blacklist_node(node_id)
+ self.do_discover()
+
super(PlanetlabNode, self).do_discover()
else:
self.fail_not_enough_nodes()
provision_ok = False
ssh_ok = False
proc_ok = False
- timeout = 120
+ timeout = 1800
while not provision_ok:
node = self._node_to_provision
- # Adding try catch to set hostname because sometimes MyPLC fails
- # when trying to retrive node's hostname
- try:
- self._set_hostname_attr(node)
- except:
- with PlanetlabNode.lock:
- self._blacklist_node(node)
- self.do_discover()
- continue
-
- self._add_node_to_slice(node)
+ if not self._slicenode:
+ self._add_node_to_slice(node)
- # check ssh connection
- t = 0
- while t < timeout and not ssh_ok:
-
+ # check ssh connection
+ t = 0
+ while t < timeout and not ssh_ok:
+
+ cmd = 'echo \'GOOD NODE\''
+ ((out, err), proc) = self.execute(cmd)
+ if out.find("GOOD NODE") < 0:
+ t = t + 60
+ time.sleep(60)
+ continue
+ else:
+ ssh_ok = True
+ continue
+ else:
cmd = 'echo \'GOOD NODE\''
((out, err), proc) = self.execute(cmd)
- if out.find("GOOD NODE") < 0:
- t = t + 60
- time.sleep(60)
- continue
- else:
+ if not out.find("GOOD NODE") < 0:
ssh_ok = True
- continue
if not ssh_ok:
# the timeout was reach without establishing ssh connection
# the node is blacklisted, deleted from the slice, and a new
# node to provision is discovered
with PlanetlabNode.lock:
+ self.warn(" Could not SSH login ")
self._blacklist_node(node)
- self._delete_node_from_slice(node)
+ #self._delete_node_from_slice(node)
self.set('hostname', None)
self.do_discover()
continue
((out, err), proc) = self.execute(cmd)
if out.find("/proc type proc") < 0:
with PlanetlabNode.lock:
+ self.warn(" Could not find directory /proc ")
self._blacklist_node(node)
- self._delete_node_from_slice(node)
+ #self._delete_node_from_slice(node)
self.set('hostname', None)
self.do_discover()
continue
"""
Retrive the list of nodes ids that match user's constraints
"""
-
# Map user's defined attributes with tagnames of PlanetLab
timeframe = self.get("timeframe")[0]
attr_to_tags = {
nodes = self.plapi.get_nodes()
for node in nodes:
nodes_id.append(node['node_id'])
-
+
return nodes_id
return nodes_id
def _choose_random_node(self, nodes):
- """
+ """
From the possible nodes for provision, choose randomly to decrese the
probability of different RMs choosing the same node for provision
"""
plist = self.plapi.reserved()
if node_id not in blist and node_id not in plist:
ping_ok = self._do_ping(node_id)
- print " ### ping_ok #### %s guid %s" % (ping_ok, self.guid)
if not ping_ok:
+ self._set_hostname_attr(node_id)
+ self.warn(" Node not responding PING ")
self._blacklist_node(node_id)
+ self.set('hostname', None)
else:
# discovered node for provision, added to provision list
self._put_node_in_provision(node_id)
- print "node_id %s , guid %s" % (node_id, self.guid)
return node_id
def _get_nodes_id(self, filters):
return self.plapi.get_nodes(filters, fields=['node_id'])
def _add_node_to_slice(self, node_id):
- self.info(" Selected node to provision ")
+ self.info(" Adding node to slice ")
slicename = self.get("username")
with PlanetlabNode.lock:
slice_nodes = self.plapi.get_slice_nodes(slicename)
"""
ping_ok = False
ip = self._get_ip(node_id)
- print "ip de do_ping %s, guid %s" % (ip, self.guid)
if not ip: return ping_ok
command = "ping -c2 %s" % ip
(out, err) = lexec(command)
- print "out de do_ping %s, guid %s" % (out, self.guid)
if not out.find("2 received") < 0:
ping_ok = True
- print "ping_ok de do_ping %s, guid %s" % (ping_ok, self.guid)
return ping_ok
def _blacklist_node(self, node):
Query PLCAPI for the IP of a node with certain node id
"""
hostname = self.plapi.get_nodes(node_id, ['hostname'])[0]
- print "#### HOSTNAME ##### %s ### guid %s " % (hostname['hostname'], self.guid)
- ip = sshfuncs.gethostbyname(hostname['hostname'])
- if not ip:
+ try:
+ ip = sshfuncs.gethostbyname(hostname['hostname'])
+ except:
# Fail while trying to find the IP
return None
return ip
def fail_discovery(self):
+ self.fail()
msg = "Discovery failed. No candidates found for node"
self.error(msg)
raise RuntimeError, msg
def fail_node_not_alive(self, hostname=None):
+ self.fail()
msg = "Node %s not alive" % hostname
raise RuntimeError, msg
def fail_node_not_available(self, hostname):
+ self.fail()
msg = "Node %s not available for provisioning" % hostname
raise RuntimeError, msg
def fail_not_enough_nodes(self):
+ self.fail()
msg = "Not enough nodes available for provisioning"
raise RuntimeError, msg
+ def fail_plapi(self):
+ self.fail()
+ msg = "Failing while trying to instanciate the PLC API"
+ raise RuntimeError, msg
+
def valid_connection(self, guid):
# TODO: Validate!
return True
git://git.onelab.eu / nepi.git / commitdiff