+#!/usr/bin/python
+
+#import cache_acls
+#import getafsgroups
+import re
+import string
+#import dns.resolver
+#from invirt.database import Machine, NIC, Type, Disk, CDROM, Autoinstall, Owner
+#from invirt.config import structs as config
+#from invirt.common import InvalidInput, CodeError
+
+MIN_MEMORY_SINGLE = 16
+MIN_DISK_SINGLE = 0.1
+
+"""
+validate takes a Machine with values for every
+property you want to change and None for everything else
+
+username is the user makeing the changes for authorization
+
+Returns: list of changes to make
+Errors: when something is invalid it throws an error
+
+ToDo: create EmptyMachine Class
+ToDo: redo all the other methods. They were stolen from web code
+
+"""
+
+def validate(username,machineValid):
+
+ if machineValid.name is None:
+ raise InvalidInput('name', name, "You must provide a machine name.")
+
+ machine = Machine.query()
+
+ authorize(username,machine)
+
+ testQuota = False
+
+ if machineValid.machine_id is not None:
+ machineValid.machine = testMachineId(state, machineValid.machine_id)
+
+ if machineValid.owner is not None:
+ machineValid.owner = testOwner(username, machineValid.owner, machine)
+ testQuote = True
+
+ if machineValid.admin is not None:
+ machineValid.admin = testAdmin(username, machineValid.admin, machine)
+ testQuota = True
+
+ if contact is not None:
+ machineValid.contact = testContact(machineValid.contact, machine)
+
+ if name is not None:
+ machineValid.name = testName(machineValid.name, machine)
+
+ if description is not None:
+ machineValid.description = testDescription(machineValid.description, machine)
+
+ if machineValid.memory is not None:
+ machineValid.memory = validMemory(machineValid.memory, machine)
+ testQuote = True
+
+ if machineValid.disksize is not None:
+ machineValid.disksize = validDisk(machineValid.disksize, machine)
+ testQuote = True
+
+ if machineValid.vmtype is not None:
+ machineValid.vmtype = validVmType(machineValid.vmtype)
+
+ if machineValid.cdrom is not None:
+ if not CDROM.query().get(machineValid.cdrom):
+ raise CodeError("Invalid cdrom type '%s'" % machineValid.cdrom)
+
+ if machineValid.autoinstall is not None:
+ #raise InvalidInput('autoinstall', 'install',
+ # "The autoinstaller has been temporarily disabled")
+ machineValid.autoinstall = Autoinstall.query().get(machineValid.autoinstall)
+
+ if testQuota:
+ validQuota(username, machineValid.owner, machine)
+
+ return machineValid
+
+
+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
+ return Machine.query().filter_by(owner=owner)
+
+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
+ machine. Else, return the maximum that machine can have.
+
+ on is whether the machine should be turned on. If false, the max
+ memory for the machine to change to, if it is left off, is
+ returned.
+ """
+ (quota_total, quota_single) = Owner.getMemoryQuotas(machine.owner if machine else owner)
+
+ if not on:
+ return quota_single
+ 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(quota_single, quota_total-mem_usage)
+
+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.
+ """
+ (quota_total, quota_single) = Owner.getDiskQuotas(machine.owner if machine else owner)
+
+ 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(quota_single, quota_total-disk_usage/1024.)
+
+def cantAddVm(owner, g):
+ machines = getMachinesByOwner(owner)
+ active_machines = [m for m in machines if m.name in g.xmlist_raw]
+ (quota_total, quota_active) = Owner.getVMQuotas(owner)
+ if machines.count() >= quota_total:
+ return 'You have too many VMs to create a new one.'
+ if len(active_machines) >= quota_active:
+ return ('You already have the maximum number of VMs turned on. '
+ 'To create more, turn one off.')
+ return False
+
+def haveAccess(user, state, machine):
+ """Return whether a user has administrative access to a 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"""
+ return user in expandLocker(machine.owner)
+
+def validMachineName(name):
+ """Check that name is valid for a machine name"""
+ if not name:
+ return False
+ 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(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.
+ """
+ try:
+ memory = int(memory)
+ if memory < MIN_MEMORY_SINGLE:
+ raise ValueError
+ except ValueError:
+ raise InvalidInput('memory', memory,
+ "Minimum %s MiB" % MIN_MEMORY_SINGLE)
+ max_val = maxMemory(owner, g, machine, on)
+ if not g.isadmin and memory > max_val:
+ raise InvalidInput('memory', memory,
+ 'Maximum %s MiB for %s' % (max_val, owner))
+ return memory
+
+def validDisk(owner, g, disk, machine=None):
+ """Parse and validate limits for disk for a given owner and machine."""
+ try:
+ disk = float(disk)
+ if not g.isadmin and disk > maxDisk(owner, machine):
+ raise InvalidInput('disk', disk,
+ "Maximum %s G" % maxDisk(owner, machine))
+ disk = int(disk * 1024)
+ if disk < MIN_DISK_SINGLE * 1024:
+ raise ValueError
+ except ValueError:
+ raise InvalidInput('disk', disk,
+ "Minimum %s GiB" % MIN_DISK_SINGLE)
+ return disk
+
+def validVmType(vm_type):
+ 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, 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,
+ "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.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, state, machine):
+ raise InvalidInput('machine_id', machine_id,
+ "You do not have access to this machine.")
+ return machine
+
+def testAdmin(user, admin, machine):
+ """Determine whether a user can set the admin of a machine to this value.
+
+ Return the value to set the admin field to (possibly 'system:' +
+ admin). XXX is modifying this a good idea?
+ """
+ if admin is None:
+ return None
+ if machine is not None and admin == machine.administrator:
+ return admin
+ if admin == user:
+ return admin
+ if ':' not in admin:
+ if cache_acls.isUser(admin):
+ return admin
+ admin = 'system:' + admin
+ try:
+ if user in getafsgroups.getAfsGroupMembers(admin, config.authz[0].cell):
+ return admin
+ except getafsgroups.AfsProcessError, e:
+ errmsg = str(e)
+ if errmsg.startswith("pts: User or group doesn't exist"):
+ errmsg = 'The group "%s" does not exist.' % admin
+ 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 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")
+ if '@' in owner:
+ raise InvalidInput('owner', owner, "No cross-realm Hesiod lockers allowed")
+ try:
+ if user not in cache_acls.expandLocker(owner):
+ raise InvalidInput('owner', owner, 'You do not have access to the '
+ + owner + ' locker')
+ except getafsgroups.AfsProcessError, e:
+ raise InvalidInput('owner', owner, str(e))
+ return owner
+
+def testContact(user, contact, machine=None):
+ 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}$", contact, re.I):
+ raise InvalidInput('contact', contact, "Not a valid email.")
+ return contact
+
+def testName(user, name, machine=None):
+ if name is None:
+ return None
+ name = name.lower()
+ if machine is not None and name == machine.name:
+ return None
+ try:
+ hostname = '%s.%s.' % (name, config.dns.domains[0])
+ resolver = dns.resolver.Resolver()
+ resolver.nameservers = ['127.0.0.1']
+ try:
+ resolver.query(hostname, 'A')
+ except dns.resolver.NoAnswer, e:
+ # If we can get the TXT record, then we can verify it's
+ # reserved. If this lookup fails, let it bubble up and be
+ # dealt with
+ answer = resolver.query(hostname, 'TXT')
+ txt = answer[0].strings[0]
+ if txt.startswith('reserved'):
+ raise InvalidInput('name', name, 'The name you have requested has been %s. For more information, contact us at %s' % (txt, config.dns.contact))
+
+ # If the hostname didn't exist, it would have thrown an
+ # exception by now - error out
+ raise InvalidInput('name', name, 'Name is already taken.')
+ except dns.resolver.NXDOMAIN, e:
+ if not validMachineName(name):
+ raise InvalidInput('name', name, 'You must provide a machine name. Max 63 chars, alnum plus \'-\', does not begin or end with \'-\'.')
+ return name
+ except InvalidInput:
+ raise
+ except:
+ # Any other error is a validation failure
+ raise InvalidInput('name', name, 'We were unable to verify that this name is available. If you believe this is in error, please contact us at %s' % config.dns.contact)
+
+def testDescription(user, description, machine=None):
+ if description is None or description.strip() == '':
+ return None
+ return description.strip()
+
+def testHostname(user, hostname, machine):
+ for nic in machine.nics:
+ if hostname == nic.hostname:
+ return hostname
+ # check if doesn't already exist
+ if NIC.select_by(hostname=hostname):
+ raise InvalidInput('hostname', hostname,
+ "Already exists")
+ if not re.match("^[A-Z0-9-]{1,22}$", hostname, re.I):
+ raise InvalidInput('hostname', hostname, "Not a valid hostname; "
+ "must only use number, letters, and dashes.")
+ return hostname
projects / invirt/packages/invirt-database.git / commitdiff
