-# $Id$
-# $URL$
-
"""Sliver manager.
The sliver manager has several functions. It is responsible for
responsible for handling delegation accounts.
"""
-import string,re
+import string
+import re
+import time
import logger
import api, api_calls
import database
-import accounts
+import account
import controller
-import sliver_vs
-try: from bwlimit import bwmin, bwmax
-except ImportError: bwmin, bwmax = 8, 1000*1000*1000
+try:
+ import sliver_lxc
+ implementation='lxc'
+ sliver_default_type='sliver.LXC'
+ sliver_class_to_register = sliver_lxc.Sliver_LXC
+ sliver_password_shell = sliver_lxc.Sliver_LXC.SHELL
+except:
+ try:
+ import sliver_vs
+ implementation='vs'
+ sliver_default_type='sliver.VServer'
+ sliver_class_to_register = sliver_vs.Sliver_VS
+ sliver_password_shell = sliver_vs.Sliver_VS.SHELL
+ except:
+ logger.log("Could not import either sliver_lxc or sliver_vs - bailing out")
+ exit(1)
+
+# just being safe
+try:
+ from plnode.bwlimit import bwmin, bwmax
+except:
+ bwmin, bwmax = 8, 1000*1000*1000
-priority=10
+priority = 10
DEFAULT_ALLOCATION = {
# CPU parameters
'cpu_pct': 0, # percent CPU reserved
'cpu_share': 1, # proportional share
+ 'cpu_cores': "0b", # reserved cpu cores <num_cores>[b]
+ 'cpu_freezable': 0, # freeze processes if cpu_cores is 0
# bandwidth parameters
'net_min_rate': bwmin / 1000, # kbps
'net_max_rate': bwmax / 1000, # kbps
start_requested = False # set to True in order to request that all slivers be started
+# check leases and adjust the 'reservation_alive' field in slivers
+# this is not expected to be saved as it will change for the next round
+def adjustReservedSlivers (data):
+ """
+ On reservable nodes, tweak the 'reservation_alive' field to instruct cyclic loop
+ about what to do with slivers.
+ """
+ # only impacts reservable nodes
+ if 'reservation_policy' not in data: return
+ policy=data['reservation_policy']
+ if policy not in ['lease_or_idle', 'lease_or_shared']:
+ if policy is not None:
+ logger.log ("unexpected reservation_policy %(policy)s"%locals())
+ return
+
+ logger.log("slivermanager.adjustReservedSlivers")
+ now=int(time.time())
+ # scan leases that are expected to show in ascending order
+ active_lease=None
+ for lease in data['leases']:
+ if lease['t_from'] <= now and now <= lease['t_until']:
+ active_lease=lease
+ break
+
+ def is_system_sliver (sliver):
+ for d in sliver['attributes']:
+ if d['tagname']=='system' and d['value']:
+ return True
+ return False
+
+ # mark slivers as appropriate
+ for sliver in data['slivers']:
+ # system slivers must be kept alive
+ if is_system_sliver(sliver):
+ sliver['reservation_alive']=True
+ continue
+
+ # regular slivers
+ if not active_lease:
+ # with 'idle_or_shared', just let the field out, behave like a shared node
+ # otherwise, mark all slivers as being turned down
+ if policy == 'lease_or_idle':
+ sliver['reservation_alive']=False
+ else:
+ # there is an active lease, mark it alive and the other not
+ sliver['reservation_alive'] = sliver['name']==active_lease['name']
+
@database.synchronized
def GetSlivers(data, config = None, plc=None, fullupdate=True):
"""This function has two purposes. One, convert GetSlivers() data
slivers."""
logger.verbose("slivermanager: Entering GetSlivers with fullupdate=%r"%fullupdate)
- for key in data.keys():
+ for key in list(data.keys()):
logger.verbose('slivermanager: GetSlivers key : ' + key)
node_id = None
try:
f = open('/etc/planetlab/node_id')
- try: node_id = int(f.read())
- finally: f.close()
- except: logger.log_exc("slivermanager: GetSlivers failed to read /etc/planetlab/node_id")
+ try:
+ node_id = int(f.read())
+ finally:
+ f.close()
+ except:
+ logger.log_exc("slivermanager: GetSlivers failed to read /etc/planetlab/node_id")
- if data.has_key('node_id') and data['node_id'] != node_id: return
+ if 'node_id' in data and data['node_id'] != node_id: return
- if data.has_key('networks'):
+ if 'networks' in data:
for network in data['networks']:
if network['is_primary'] and network['bwlimit'] is not None:
DEFAULT_ALLOCATION['net_max_rate'] = network['bwlimit'] / 1000
- # Take initscripts (global) returned by API, make dict
+ # Take initscripts (global) returned by API, build a hash scriptname->code
+ iscripts_hash = {}
if 'initscripts' not in data:
- logger.log_missing_data("slivermanager.GetSlivers",'initscripts')
+ logger.log_missing_data("slivermanager.GetSlivers", 'initscripts')
return
- initscripts = {}
- for is_rec in data['initscripts']:
- logger.verbose("slivermanager: initscript: %s" % is_rec['name'])
- initscripts[str(is_rec['name'])] = is_rec['script']
+ for initscript_rec in data['initscripts']:
+ logger.verbose("slivermanager: initscript: %s" % initscript_rec['name'])
+ iscripts_hash[str(initscript_rec['name'])] = initscript_rec['script']
+ adjustReservedSlivers (data)
for sliver in data['slivers']:
logger.verbose("slivermanager: %s: slivermanager.GetSlivers in slivers loop"%sliver['name'])
rec = sliver.copy()
if rec['instantiation'].lower() == 'nm-controller':
rec.setdefault('type', attributes.get('type', 'controller.Controller'))
else:
- rec.setdefault('type', attributes.get('type', 'sliver.VServer'))
+ rec.setdefault('type', attributes.get('type', sliver_default_type))
# set the vserver reference. If none, set to default.
rec.setdefault('vref', attributes.get('vref', 'default'))
- # set initscripts. first check if exists, if not, leave empty.
- is_name = attributes.get('initscript')
- if is_name is not None and is_name in initscripts:
- rec['initscript'] = initscripts[is_name]
+ ### set initscripts; set empty rec['initscript'] if not
+ # if tag 'initscript_code' is set, that's what we use
+ iscode = attributes.get('initscript_code', '')
+ if iscode:
+ rec['initscript'] = iscode
else:
- rec['initscript'] = ''
+ isname = attributes.get('initscript')
+ if isname is not None and isname in iscripts_hash:
+ rec['initscript'] = iscripts_hash[isname]
+ else:
+ rec['initscript'] = ''
# set delegations, if none, set empty
rec.setdefault('delegations', attributes.get("delegations", []))
# extract the implied rspec
rspec = {}
rec['rspec'] = rspec
- for resname, default_amount in DEFAULT_ALLOCATION.iteritems():
+ for resname, default_amount in DEFAULT_ALLOCATION.items():
try:
t = type(default_amount)
- amt = t.__new__(t, attributes[resname])
- except (KeyError, ValueError): amt = default_amount
- rspec[resname] = amt
+ amount = t.__new__(t, attributes[resname])
+ except (KeyError, ValueError): amount = default_amount
+ rspec[resname] = amount
# add in sysctl attributes into the rspec
- for key in attributes.keys():
+ for key in list(attributes.keys()):
if key.find("sysctl.") == 0:
rspec[key] = attributes[key]
+ # also export tags in rspec so they make it to the sliver_vs.start call
+ rspec['tags'] = attributes
+
database.db.deliver_record(rec)
- if fullupdate: database.db.set_min_timestamp(data['timestamp'])
+ if fullupdate:
+ database.db.set_min_timestamp(data['timestamp'])
# slivers are created here.
database.db.sync()
def deliver_ticket(data):
return GetSlivers(data, fullupdate=False)
-def start(options, config):
- for resname, default_amount in sliver_vs.DEFAULT_ALLOCATION.iteritems():
- DEFAULT_ALLOCATION[resname]=default_amount
+def start():
+ # No default allocation values for LXC yet, think if its necessary given
+ # that they are also default allocation values in this module
+ if implementation == 'vs':
+ for resname, default_amount in sliver_vs.DEFAULT_ALLOCATION.items():
+ DEFAULT_ALLOCATION[resname]=default_amount
- accounts.register_class(sliver_vs.Sliver_VS)
- accounts.register_class(controller.Controller)
+ account.register_class(sliver_class_to_register)
+ account.register_class(controller.Controller)
database.start()
api_calls.deliver_ticket = deliver_ticket
api.start()
+
+### check if a sliver is running
+### a first step to a unified code for codemux
+def is_running (name):
+ if implementation=='vs':
+ import vserver
+ return vserver.VServer(name).is_running()
+ else:
+ import libvirt
+ running = False
+ try:
+ conn = libvirt.open('lxc://')
+ dom = conn.lookupByName(name)
+ running = dom.info()[0] == libvirt.VIR_DOMAIN_RUNNING
+ finally:
+ conn.close()
+ return running
git://git.onelab.eu / nodemanager.git / blobdiff