import getafsgroups
import re
import string
-from sipb_xen_database import Machine, NIC, Type
-from webcommon import InvalidInput, g
+import dns.resolver
+from invirt.database import Machine, NIC, Type, Disk, CDROM, Autoinstall
+from invirt.config import structs as config
+from invirt.common import InvalidInput
MAX_MEMORY_TOTAL = 512
MAX_MEMORY_SINGLE = 256
MAX_VMS_TOTAL = 10
MAX_VMS_ACTIVE = 4
-def getMachinesByOwner(user, machine=None):
+class Validate:
+ def __init__(self, username, state, machine_id=None, name=None, description=None, owner=None,
+ admin=None, contact=None, memory=None, disksize=None,
+ vmtype=None, cdrom=None, autoinstall=None, strict=False):
+ # XXX Successive quota checks aren't a good idea, since you
+ # can't necessarily change the locker and disk size at the
+ # same time.
+ created_new = (machine_id is None)
+
+ if strict:
+ if name is None:
+ raise InvalidInput('name', name, "You must provide a machine name.")
+ if description is None:
+ raise InvalidInput('description', description, "You must provide a description.")
+ if memory is None:
+ raise InvalidInput('memory', memory, "You must provide a memory size.")
+ if disksize is None:
+ raise InvalidInput('disk', disksize, "You must provide a disk size.")
+
+ if machine_id is not None:
+ self.machine = testMachineId(username, state, machine_id)
+ machine = getattr(self, 'machine', None)
+
+ owner = testOwner(username, owner, machine)
+ if owner is not None:
+ self.owner = owner
+ admin = testAdmin(username, admin, machine)
+ if admin is not None:
+ self.admin = admin
+ contact = testContact(username, contact, machine)
+ if contact is not None:
+ self.contact = contact
+ name = testName(username, name, machine)
+ if name is not None:
+ self.name = name
+ description = testDescription(username, description, machine)
+ if description is not None:
+ self.description = description
+ if memory is not None:
+ self.memory = validMemory(self.owner, state, memory, machine,
+ on=not created_new)
+ if disksize is not None:
+ self.disksize = validDisk(self.owner, state, disksize, machine)
+ if vmtype is not None:
+ self.vmtype = validVmType(vmtype)
+ if cdrom is not None:
+ if not CDROM.query().get(cdrom):
+ raise CodeError("Invalid cdrom type '%s'" % cdrom)
+ self.cdrom = cdrom
+ if autoinstall is not None:
+ self.autoinstall = Autoinstall.query().get(autoinstall)
+
+
+def getMachinesByOwner(owner, machine=None):
"""Return the machines owned by the same as a machine.
-
+
If the machine is None, return the machines owned by the same
user.
"""
if machine:
owner = machine.owner
- else:
- owner = user
- return Machine.select_by(owner=owner)
+ return Machine.query().filter_by(owner=owner)
-def maxMemory(user, machine=None, on=True):
+def maxMemory(owner, g, machine=None, on=True):
"""Return the maximum memory for a machine or a user.
- If machine is None, return the memory available for a new
+ If machine is None, return the memory available for a new
machine. Else, return the maximum that machine can have.
on is whether the machine should be turned on. If false, the max
return machine.memory
if not on:
return MAX_MEMORY_SINGLE
- machines = getMachinesByOwner(user, machine)
- active_machines = [x for x in machines if g.uptimes.get(x)]
+ machines = getMachinesByOwner(owner, machine)
+ active_machines = [m for m in machines if m.name in g.xmlist_raw]
mem_usage = sum([x.memory for x in active_machines if x != machine])
return min(MAX_MEMORY_SINGLE, MAX_MEMORY_TOTAL-mem_usage)
-def maxDisk(user, machine=None):
- machines = getMachinesByOwner(user, machine)
- disk_usage = sum([sum([y.size for y in x.disks])
- for x in machines if x != machine])
+def maxDisk(owner, machine=None):
+ """Return the maximum disk that a machine can reach.
+
+ If machine is None, the maximum disk for a new machine. Otherwise,
+ return the maximum that a given machine can be changed to.
+ """
+ if machine is not None:
+ machine_id = machine.machine_id
+ else:
+ machine_id = None
+ disk_usage = Disk.query().filter(Disk.c.machine_id != machine_id).\
+ join('machine').\
+ filter_by(owner=owner).sum(Disk.c.size) or 0
return min(MAX_DISK_SINGLE, MAX_DISK_TOTAL-disk_usage/1024.)
-def cantAddVm(user):
- machines = getMachinesByOwner(user)
- active_machines = [x for x in machines if g.uptimes.get(x)]
- if len(machines) >= MAX_VMS_TOTAL:
+def cantAddVm(owner, g):
+ machines = getMachinesByOwner(owner)
+ active_machines = [m for m in machines if m.name in g.xmlist_raw]
+ if machines.count() >= MAX_VMS_TOTAL:
return 'You have too many VMs to create a new one.'
if len(active_machines) >= MAX_VMS_ACTIVE:
return ('You already have the maximum number of VMs turned on. '
'To create more, turn one off.')
return False
-def validAddVm(user):
- reason = cantAddVm(user)
- if reason:
- raise InvalidInput('create', True, reason)
- return True
-
-def haveAccess(user, machine):
+def haveAccess(user, state, machine):
"""Return whether a user has administrative access to a machine"""
- return user in cache_acls.accessList(machine)
+ return (user in cache_acls.accessList(machine)
+ or (machine.adminable and state.isadmin))
def owns(user, machine):
"""Return whether a user owns a machine"""
"""Check that name is valid for a machine name"""
if not name:
return False
- charset = string.ascii_letters + string.digits + '-_'
- if name[0] in '-_' or len(name) > 22:
+ charset = string.lowercase + string.digits + '-'
+ if '-' in (name[0], name[-1]) or len(name) > 63:
return False
for x in name:
if x not in charset:
return False
return True
-def validMemory(user, memory, machine=None, on=True):
- """Parse and validate limits for memory for a given user and machine.
+def validMemory(owner, g, memory, machine=None, on=True):
+ """Parse and validate limits for memory for a given owner and machine.
on is whether the memory must be valid after the machine is
switched on.
if memory < MIN_MEMORY_SINGLE:
raise ValueError
except ValueError:
- raise InvalidInput('memory', memory,
+ raise InvalidInput('memory', memory,
"Minimum %s MiB" % MIN_MEMORY_SINGLE)
- if memory > maxMemory(user, machine, on):
+ max_val = maxMemory(owner, g, machine, on)
+ if not g.isadmin and memory > max_val:
raise InvalidInput('memory', memory,
- 'Maximum %s MiB for %s' % (maxMemory(user, machine),
- user))
+ 'Maximum %s MiB for %s' % (max_val, owner))
return memory
-def validDisk(user, disk, machine=None):
- """Parse and validate limits for disk for a given user and machine."""
+def validDisk(owner, g, disk, machine=None):
+ """Parse and validate limits for disk for a given owner and machine."""
try:
disk = float(disk)
- if disk > maxDisk(user, machine):
+ if not g.isadmin and disk > maxDisk(owner, machine):
raise InvalidInput('disk', disk,
- "Maximum %s G" % maxDisk(user, machine))
+ "Maximum %s G" % maxDisk(owner, machine))
disk = int(disk * 1024)
if disk < MIN_DISK_SINGLE * 1024:
raise ValueError
return disk
def validVmType(vm_type):
- if vm_type == 'hvm':
- return Type.get('linux-hvm')
- elif vm_type == 'paravm':
- return Type.get('linux')
- else:
+ if vm_type is None:
+ return None
+ t = Type.query().get(vm_type)
+ if t is None:
raise CodeError("Invalid vm type '%s'" % vm_type)
+ return t
-def testMachineId(user, machine_id, exists=True):
+def testMachineId(user, state, machine_id, exists=True):
"""Parse, validate and check authorization for a given user and machine.
If exists is False, don't check that it exists.
"""
if machine_id is None:
- raise InvalidInput('machine_id', machine_id,
+ raise InvalidInput('machine_id', machine_id,
"Must specify a machine ID.")
try:
machine_id = int(machine_id)
except ValueError:
raise InvalidInput('machine_id', machine_id, "Must be an integer.")
- machine = Machine.get(machine_id)
+ machine = Machine.query().get(machine_id)
if exists and machine is None:
raise InvalidInput('machine_id', machine_id, "Does not exist.")
- if machine is not None and not haveAccess(user, machine):
+ if machine is not None and not haveAccess(user, state, machine):
raise InvalidInput('machine_id', machine_id,
"You do not have access to this machine.")
return machine
Return the value to set the admin field to (possibly 'system:' +
admin). XXX is modifying this a good idea?
"""
- if admin in (None, machine.administrator):
+ if admin is None:
+ return None
+ if machine is not None and admin == machine.administrator:
return None
if admin == user:
return admin
return admin
admin = 'system:' + admin
try:
- if user in getafsgroups.getAfsGroupMembers(admin, 'athena.mit.edu'):
+ if user in getafsgroups.getAfsGroupMembers(admin, config.authz[0].cell):
return admin
except getafsgroups.AfsProcessError, e:
errmsg = str(e)
raise InvalidInput('administrator', admin, errmsg)
#XXX Should we require that user is in the admin group?
return admin
-
+
def testOwner(user, owner, machine=None):
"""Determine whether a user can set the owner of a machine to this value.
If machine is None, this is the owner of a new machine.
"""
- if owner == user or machine is not None and owner == machine.owner:
+ if owner == user:
return owner
+ if machine is not None and owner in (machine.owner, None):
+ return machine.owner
if owner is None:
raise InvalidInput('owner', owner, "Owner must be specified")
try:
return owner
def testContact(user, contact, machine=None):
- if contact in (None, machine.contact):
+ if contact is None or (machine is not None and contact == machine.contact):
return None
if not re.match("^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$", contact, re.I):
raise InvalidInput('contact', contact, "Not a valid email.")
return disksize
def testName(user, name, machine=None):
- if name in (None, machine.name):
+ if name is None:
return None
- if not Machine.select_by(name=name):
+ name = name.lower()
+ if machine is not None and name == machine.name:
+ return None
+ try:
+ hostname = '%s.%s.' % (name, config.dns.domains[0])
+ resolver = dns.resolver.Resolver()
+ resolver.nameservers = ['127.0.0.1']
+ try:
+ resolver.query(hostname, 'A')
+ except dns.resolver.NoAnswer, e:
+ # If we can get the TXT record, then we can verify it's
+ # reserved. If this lookup fails, let it bubble up and be
+ # dealt with
+ answer = resolver.query(hostname, 'TXT')
+ txt = answer[0].strings[0]
+ if txt.startswith('reserved'):
+ raise InvalidInput('name', name, 'The name you have requested has been %s. For more information, contact us at %s' % (txt, config.dns.contact))
+
+ # If the hostname didn't exist, it would have thrown an
+ # exception by now - error out
+ raise InvalidInput('name', name, 'Name is already taken.')
+ except dns.resolver.NXDOMAIN, e:
+ if not validMachineName(name):
+ raise InvalidInput('name', name, 'You must provide a machine name. Max 63 chars, alnum plus \'-\', does not begin or end with \'-\'.')
return name
- raise InvalidInput('name', name, "Name is already taken.")
+ except InvalidInput:
+ raise
+ except:
+ # Any other error is a validation failure
+ raise InvalidInput('name', name, 'We were unable to verify that this name is available. If you believe this is in error, please contact us at %s' % config.dns.contact)
+
+def testDescription(user, description, machine=None):
+ if description is None or description.strip() == '':
+ return None
+ return description.strip()
def testHostname(user, hostname, machine):
for nic in machine.nics:
projects / invirt/packages/invirt-web.git / blobdiff