+++ /dev/null
-"""
-Functions to perform remctls.
-"""
-
-from sipb_xen_database import Machine, Disk, Type, NIC, CDROM, ctx, meta
-import validation
-from webcommon import CodeError, InvalidInput
-import random
-import subprocess
-import sys
-import time
-import re
-
-# ... and stolen from xend/uuid.py
-def randomUUID():
- """Generate a random UUID."""
-
- return [ random.randint(0, 255) for _ in range(0, 16) ]
-
-def uuidToString(u):
- """Turn a numeric UUID to a hyphen-seperated one."""
- return "-".join(["%02x" * 4, "%02x" * 2, "%02x" * 2, "%02x" * 2,
- "%02x" * 6]) % tuple(u)
-# end stolen code
-
-def kinit(username = 'daemon/sipb-xen.mit.edu', keytab = '/etc/sipb-xen.keytab'):
- """Kinit with a given username and keytab"""
-
- p = subprocess.Popen(['kinit', "-k", "-t", keytab, username],
- stderr=subprocess.PIPE)
- e = p.wait()
- if e:
- raise CodeError("Error %s in kinit: %s" % (e, p.stderr.read()))
-
-def checkKinit():
- """If we lack tickets, kinit."""
- p = subprocess.Popen(['klist', '-s'])
- if p.wait():
- kinit()
-
-def remctl(*args, **kws):
- """Perform a remctl and return the output.
-
- kinits if necessary, and outputs errors to stderr.
- """
- checkKinit()
- p = subprocess.Popen(['remctl', 'black-mesa.mit.edu']
- + list(args),
- stdout=subprocess.PIPE,
- stderr=subprocess.PIPE)
- v = p.wait()
- if kws.get('err'):
- return p.stdout.read(), p.stderr.read()
- if v:
- print >> sys.stderr, 'Error', v, 'on remctl', args, ':'
- print >> sys.stderr, p.stderr.read()
- raise CodeError('ERROR on remctl')
- return p.stdout.read()
-
-def lvcreate(machine, disk):
- """Create a single disk for a machine"""
- remctl('web', 'lvcreate', machine.name,
- disk.guest_device_name, str(disk.size))
-
-def makeDisks(machine):
- """Update the lvm partitions to add a disk."""
- for disk in machine.disks:
- lvcreate(machine, disk)
-
-def bootMachine(machine, cdtype):
- """Boot a machine with a given boot CD.
-
- If cdtype is None, give no boot cd. Otherwise, it is the string
- id of the CD (e.g. 'gutsy_i386')
- """
- if cdtype is not None:
- remctl('control', machine.name, 'create',
- cdtype)
- else:
- remctl('control', machine.name, 'create')
-
-def registerMachine(machine):
- """Register a machine to be controlled by the web interface"""
- remctl('web', 'register', machine.name)
-
-def unregisterMachine(machine):
- """Unregister a machine to not be controlled by the web interface"""
- remctl('web', 'unregister', machine.name)
-
-def createVm(owner, contact, name, memory, disk, is_hvm, cdrom):
- """Create a VM and put it in the database"""
- # put stuff in the table
- transaction = ctx.current.create_transaction()
- try:
- validation.validMemory(owner, memory)
- validation.validDisk(owner, disk * 1. / 1024)
- validation.validAddVm(owner)
- res = meta.engine.execute('select nextval('
- '\'"machines_machine_id_seq"\')')
- id = res.fetchone()[0]
- machine = Machine()
- machine.machine_id = id
- machine.name = name
- machine.memory = memory
- machine.owner = owner
- machine.administrator = owner
- machine.contact = contact
- machine.uuid = uuidToString(randomUUID())
- machine.boot_off_cd = True
- machine_type = Type.get_by(hvm=is_hvm)
- machine.type_id = machine_type.type_id
- ctx.current.save(machine)
- disk = Disk(machine.machine_id,
- 'hda', disk)
- open_nics = NIC.select_by(machine_id=None)
- if not open_nics: #No IPs left!
- raise CodeError("No IP addresses left! "
- "Contact sipb-xen-dev@mit.edu")
- nic = open_nics[0]
- nic.machine_id = machine.machine_id
- nic.hostname = name
- ctx.current.save(nic)
- ctx.current.save(disk)
- transaction.commit()
- except:
- transaction.rollback()
- raise
- registerMachine(machine)
- makeDisks(machine)
- # tell it to boot with cdrom
- bootMachine(machine, cdrom)
- return machine
-
-def getUptimes(machines=None):
- """Return a dictionary mapping machine names to uptime strings"""
- value_string = remctl('web', 'listvms')
- lines = value_string.splitlines()
- d = {}
- for line in lines:
- lst = line.split()
- name, id = lst[:2]
- uptime = ' '.join(lst[2:])
- d[name] = uptime
- ans = {}
- for m in machines:
- ans[m] = d.get(m.name)
- return ans
-
-def parseStatus(s):
- """Parse a status string into nested tuples of strings.
-
- s = output of xm list --long <machine_name>
- """
- values = re.split('([()])', s)
- stack = [[]]
- for v in values[2:-2]: #remove initial and final '()'
- if not v:
- continue
- v = v.strip()
- if v == '(':
- stack.append([])
- elif v == ')':
- if len(stack[-1]) == 1:
- stack[-1].append('')
- stack[-2].append(stack[-1])
- stack.pop()
- else:
- if not v:
- continue
- stack[-1].extend(v.split())
- return stack[-1]
-
-def statusInfo(machine):
- """Return the status list for a given machine.
-
- Gets and parses xm list --long
- """
- value_string, err_string = remctl('control', machine.name, 'list-long',
- err=True)
- if 'Unknown command' in err_string:
- raise CodeError("ERROR in remctl list-long %s is not registered" %
- (machine.name,))
- elif 'does not exist' in err_string:
- return None
- elif err_string:
- raise CodeError("ERROR in remctl list-long %s: %s" %
- (machine.name, err_string))
- status = parseStatus(value_string)
- return status
-
-def deleteVM(machine):
- """Delete a VM."""
- remctl('control', machine.name, 'destroy', err=True)
- transaction = ctx.current.create_transaction()
- delete_disk_pairs = [(machine.name, d.guest_device_name)
- for d in machine.disks]
- try:
- for nic in machine.nics:
- nic.machine_id = None
- nic.hostname = None
- ctx.current.save(nic)
- for disk in machine.disks:
- ctx.current.delete(disk)
- ctx.current.delete(machine)
- transaction.commit()
- except:
- transaction.rollback()
- raise
- for mname, dname in delete_disk_pairs:
- remctl('web', 'lvremove', mname, dname)
- unregisterMachine(machine)
-
-def commandResult(user, fields):
- start_time = 0
- print >> sys.stderr, time.time()-start_time
- machine = validation.testMachineId(user, fields.getfirst('machine_id'))
- action = fields.getfirst('action')
- cdrom = fields.getfirst('cdrom')
- print >> sys.stderr, time.time()-start_time
- if cdrom is not None and not CDROM.get(cdrom):
- raise CodeError("Invalid cdrom type '%s'" % cdrom)
- if action not in ('Reboot', 'Power on', 'Power off', 'Shutdown',
- 'Delete VM'):
- raise CodeError("Invalid action '%s'" % action)
- if action == 'Reboot':
- if cdrom is not None:
- out, err = remctl('control', machine.name, 'reboot', cdrom,
- err=True)
- else:
- out, err = remctl('control', machine.name, 'reboot',
- err=True)
- if err:
- if re.match("Error: Domain '.*' does not exist.", err):
- raise InvalidInput("action", "reboot",
- "Machine is not on")
- else:
- print >> sys.stderr, 'Error on reboot:'
- print >> sys.stderr, err
- raise CodeError('ERROR on remctl')
-
- elif action == 'Power on':
- if validation.maxMemory(user, machine) < machine.memory:
- raise InvalidInput('action', 'Power on',
- "You don't have enough free RAM quota "
- "to turn on this machine.")
- bootMachine(machine, cdrom)
- elif action == 'Power off':
- out, err = remctl('control', machine.name, 'destroy', err=True)
- if err:
- if re.match("Error: Domain '.*' does not exist.", err):
- raise InvalidInput("action", "Power off",
- "Machine is not on.")
- else:
- print >> sys.stderr, 'Error on power off:'
- print >> sys.stderr, err
- raise CodeError('ERROR on remctl')
- elif action == 'Shutdown':
- out, err = remctl('control', machine.name, 'shutdown', err=True)
- if err:
- if re.match("Error: Domain '.*' does not exist.", err):
- raise InvalidInput("action", "Shutdown",
- "Machine is not on.")
- else:
- print >> sys.stderr, 'Error on Shutdown:'
- print >> sys.stderr, err
- raise CodeError('ERROR on remctl')
- elif action == 'Delete VM':
- deleteVM(machine)
- print >> sys.stderr, time.time()-start_time
-
- d = dict(user=user,
- command=action,
- machine=machine)
- return d
-
-def resizeDisk(machine_name, disk_name, new_size):
- remctl("web", "lvresize", machine_name, disk_name, new_size)
-
-def renameMachine(machine, old_name, new_name):
- for disk in machine.disks:
- remctl("web", "lvrename", old_name,
- disk.guest_device_name, new_name)
- remctl("web", "moveregister", old_name, new_name)
-
projects / invirt/packages/invirt-web.git / blobdiff