X-Git-Url: http://xvm.mit.edu/gitweb/invirt/packages/invirt-web.git/blobdiff_plain/f3c1b256ad0f930d2f7fc623ad538692a3829979..4663602deda7a8c90d59c8d3a57cd5a3945d73ca:/templates/main.py

diff --git a/templates/main.py b/templates/main.py
deleted file mode 100755
index 915b5eb..0000000
--- a/templates/main.py
+++ /dev/null
@@ -1,894 +0,0 @@
-#!/usr/bin/python
-
-import sys
-import cgi
-import os
-import string
-import subprocess
-import re
-import time
-import cPickle
-import base64
-import sha
-import hmac
-import datetime
-import StringIO
-import getafsgroups
-
-errio = StringIO.StringIO()
-sys.stderr = errio
-sys.path.append('/home/ecprice/.local/lib/python2.5/site-packages')
-
-from Cheetah.Template import Template
-from sipb_xen_database import *
-import random
-
-class MyException(Exception):
-    """Base class for my exceptions"""
-    pass
-
-class InvalidInput(MyException):
-    """Exception for user-provided input is invalid but maybe in good faith.
-
-    This would include setting memory to negative (which might be a
-    typo) but not setting an invalid boot CD (which requires bypassing
-    the select box).
-    """
-    def __init__(self, err_field, err_value, expl=None):
-        MyException.__init__(self, expl)
-        self.err_field = err_field
-        self.err_value = err_value
-
-class CodeError(MyException):
-    """Exception for internal errors or bad faith input."""
-    pass
-
-class Global(object):
-    def __init__(self, user):
-        self.user = user
-
-    def __get_uptimes(self):
-        if not hasattr(self, '_uptimes'):
-            self._uptimes = getUptimes(Machine.select())
-        return self._uptimes
-    uptimes = property(__get_uptimes)
-
-g = None
-
-def helppopup(subj):
-    """Return HTML code for a (?) link to a specified help topic"""
-    return '<span class="helplink"><a href="help?subject='+subj+'&amp;simple=true" target="_blank" onclick="return helppopup(\''+subj+'\')">(?)</a></span>'
-
-
-global_dict = {}
-global_dict['helppopup'] = helppopup
-
-
-# ... 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)
-
-MAX_MEMORY_TOTAL = 512
-MAX_MEMORY_SINGLE = 256
-MIN_MEMORY_SINGLE = 16
-MAX_DISK_TOTAL = 50
-MAX_DISK_SINGLE = 50
-MIN_DISK_SINGLE = 0.1
-MAX_VMS_TOTAL = 10
-MAX_VMS_ACTIVE = 4
-
-def getMachinesByOwner(user, 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.username
-    return Machine.select_by(owner=owner)
-
-def maxMemory(user, 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.
-    """
-    if not on:
-        return MAX_MEMORY_SINGLE
-    machines = getMachinesByOwner(user, machine)
-    active_machines = [x for x in machines if g.uptimes[x]]
-    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])
-    return min(MAX_DISK_SINGLE, MAX_DISK_TOTAL-disk_usage/1024.)
-
-def canAddVm(user):
-    machines = getMachinesByOwner(user)
-    active_machines = [x for x in machines if g.uptimes[x]]
-    return (len(machines) < MAX_VMS_TOTAL and
-            len(active_machines) < MAX_VMS_ACTIVE)
-
-def haveAccess(user, machine):
-    """Return whether a user has adminstrative access to a machine"""
-    if user.username == 'moo':
-        return True
-    if user.username in (machine.administrator, machine.owner):
-        return True
-    if getafsgroups.checkAfsGroup(user.username, machine.administrator, 'athena.mit.edu'): #XXX Cell?
-        return True
-    if getafsgroups.checkLockerOwner(user.username, machine.owner):
-        return True
-    return owns(user, machine)
-
-def owns(user, machine):
-    """Return whether a user owns a machine"""
-    if user.username == 'moo':
-        return True
-    return getafsgroups.checkLockerOwner(user.username, machine.owner)
-
-def error(op, user, fields, err, emsg):
-    """Print an error page when a CodeError occurs"""
-    d = dict(op=op, user=user, errorMessage=str(err),
-             stderr=emsg)
-    return Template(file='error.tmpl', searchList=[d, global_dict]);
-
-def invalidInput(op, user, fields, err, emsg):
-    """Print an error page when an InvalidInput exception occurs"""
-    d = dict(op=op, user=user, err_field=err.err_field,
-             err_value=str(err.err_value), stderr=emsg,
-             errorMessage=str(err))
-    return Template(file='invalid.tmpl', searchList=[d, global_dict]);
-
-def validMachineName(name):
-    """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:
-        return False
-    for x in name:
-        if x not in charset:
-            return False
-    return True
-
-def kinit(username = 'tabbott/extra', keytab = '/etc/tabbott.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)
-    if kws.get('err'):
-        p.wait()
-        return p.stdout.read(), p.stderr.read()
-    if p.wait():
-        print >> sys.stderr, 'Error 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 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 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 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 hasVnc(status):
-    """Does the machine with a given status list support VNC?"""
-    if status is None:
-        return False
-    for l in status:
-        if l[0] == 'device' and l[1][0] == 'vfb':
-            d = dict(l[1][1:])
-            return 'location' in d
-    return False
-
-def createVm(user, 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:
-        if memory > maxMemory(user):
-            raise InvalidInput('memory', memory,
-                               "Max %s" % maxMemory(user))
-        if disk > maxDisk(user) * 1024:
-            raise InvalidInput('disk', disk,
-                               "Max %s" % maxDisk(user))
-        if not canAddVm(user):
-            raise InvalidInput('create', True, 'Unable to create more VMs')
-        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 = user.username
-        machine.administrator = user.username
-        machine.contact = user.email
-        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 = NIC.select_by(machine_id=None)
-        if not open: #No IPs left!
-            raise CodeError("No IP addresses left!  Contact sipb-xen-dev@mit.edu")
-        nic = open[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 validMemory(user, memory, machine=None, on=True):
-    """Parse and validate limits for memory for a given user 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 MB" % MIN_MEMORY_SINGLE)
-    if memory > maxMemory(user, machine, on):
-        raise InvalidInput('memory', memory,
-                           'Maximum %s MB' % maxMemory(user, machine))
-    return memory
-
-def validDisk(user, disk, machine=None):
-    """Parse and validate limits for disk for a given user and machine."""
-    try:
-        disk = float(disk)
-        if disk > maxDisk(user, machine):
-            raise InvalidInput('disk', disk,
-                               "Maximum %s G" % maxDisk(user, machine))
-        disk = int(disk * 1024)
-        if disk < MIN_DISK_SINGLE * 1024:
-            raise ValueError
-    except ValueError:
-        raise InvalidInput('disk', disk,
-                           "Minimum %s GB" % MIN_DISK_SINGLE)
-    return disk
-
-def create(user, fields):
-    """Handler for create requests."""
-    name = fields.getfirst('name')
-    if not validMachineName(name):
-        raise InvalidInput('name', name)
-    name = name.lower()
-
-    if Machine.get_by(name=name):
-        raise InvalidInput('name', name,
-                           "Already exists")
-    
-    memory = fields.getfirst('memory')
-    memory = validMemory(user, memory, on=True)
-    
-    disk = fields.getfirst('disk')
-    disk = validDisk(user, disk)
-
-    vm_type = fields.getfirst('vmtype')
-    if vm_type not in ('hvm', 'paravm'):
-        raise CodeError("Invalid vm type '%s'"  % vm_type)    
-    is_hvm = (vm_type == 'hvm')
-
-    cdrom = fields.getfirst('cdrom')
-    if cdrom is not None and not CDROM.get(cdrom):
-        raise CodeError("Invalid cdrom type '%s'" % cdrom)    
-    
-    machine = createVm(user, name, memory, disk, is_hvm, cdrom)
-    d = dict(user=user,
-             machine=machine)
-    return Template(file='create.tmpl',
-                   searchList=[d, global_dict]);
-
-def listVms(user, fields):
-    """Handler for list requests."""
-    machines = [m for m in Machine.select() if haveAccess(user, m)]    
-    on = {}
-    has_vnc = {}
-    on = g.uptimes
-    for m in machines:
-        if not on[m]:
-            has_vnc[m] = 'Off'
-        elif m.type.hvm:
-            has_vnc[m] = True
-        else:
-            has_vnc[m] = "ParaVM"+helppopup("paravm_console")
-    #     for m in machines:
-    #         status = statusInfo(m)
-    #         on[m.name] = status is not None
-    #         has_vnc[m.name] = hasVnc(status)
-    max_mem=maxMemory(user)
-    max_disk=maxDisk(user)
-    d = dict(user=user,
-             can_add_vm=canAddVm(user),
-             max_mem=max_mem,
-             max_disk=max_disk,
-             default_mem=max_mem,
-             default_disk=min(4.0, max_disk),
-             machines=machines,
-             has_vnc=has_vnc,
-             uptimes=g.uptimes,
-             cdroms=CDROM.select())
-    return Template(file='list.tmpl', searchList=[d, global_dict])
-
-def testMachineId(user, machineId, exists=True):
-    """Parse, validate and check authorization for a given machineId.
-
-    If exists is False, don't check that it exists.
-    """
-    if machineId is None:
-        raise CodeError("No machine ID specified")
-    try:
-        machineId = int(machineId)
-    except ValueError:
-        raise CodeError("Invalid machine ID '%s'" % machineId)
-    machine = Machine.get(machineId)
-    if exists and machine is None:
-        raise CodeError("No such machine ID '%s'" % machineId)
-    if machine is not None and not haveAccess(user, machine):
-        raise CodeError("No access to machine ID '%s'" % machineId)
-    return machine
-
-def vnc(user, fields):
-    """VNC applet page.
-
-    Note that due to same-domain restrictions, the applet connects to
-    the webserver, which needs to forward those requests to the xen
-    server.  The Xen server runs another proxy that (1) authenticates
-    and (2) finds the correct port for the VM.
-
-    You might want iptables like:
-
-    -t nat -A PREROUTING -s ! 18.181.0.60 -i eth1 -p tcp -m tcp --dport 10003 -j DNAT --to-destination 18.181.0.60:10003 
-    -t nat -A POSTROUTING -d 18.181.0.60 -o eth1 -p tcp -m tcp --dport 10003 -j SNAT --to-source 18.187.7.142 
-    -A FORWARD -d 18.181.0.60 -i eth1 -o eth1 -p tcp -m tcp --dport 10003 -j ACCEPT
-
-    Remember to enable iptables!
-    echo 1 > /proc/sys/net/ipv4/ip_forward
-    """
-    machine = testMachineId(user, fields.getfirst('machine_id'))
-    
-    TOKEN_KEY = "0M6W0U1IXexThi5idy8mnkqPKEq1LtEnlK/pZSn0cDrN"
-
-    data = {}
-    data["user"] = user.username
-    data["machine"]=machine.name
-    data["expires"]=time.time()+(5*60)
-    pickledData = cPickle.dumps(data)
-    m = hmac.new(TOKEN_KEY, digestmod=sha)
-    m.update(pickledData)
-    token = {'data': pickledData, 'digest': m.digest()}
-    token = cPickle.dumps(token)
-    token = base64.urlsafe_b64encode(token)
-    
-    status = statusInfo(machine)
-    has_vnc = hasVnc(status)
-    
-    d = dict(user=user,
-             on=status,
-             has_vnc=has_vnc,
-             machine=machine,
-             hostname=os.environ.get('SERVER_NAME', 'localhost'),
-             authtoken=token)
-    return Template(file='vnc.tmpl',
-                   searchList=[d, global_dict])
-
-def getNicInfo(data_dict, machine):
-    """Helper function for info, get data on nics for a machine.
-
-    Modifies data_dict to include the relevant data, and returns a list
-    of (key, name) pairs to display "name: data_dict[key]" to the user.
-    """
-    data_dict['num_nics'] = len(machine.nics)
-    nic_fields_template = [('nic%s_hostname', 'NIC %s hostname'),
-                           ('nic%s_mac', 'NIC %s MAC Addr'),
-                           ('nic%s_ip', 'NIC %s IP'),
-                           ]
-    nic_fields = []
-    for i in range(len(machine.nics)):
-        nic_fields.extend([(x % i, y % i) for x, y in nic_fields_template])
-        data_dict['nic%s_hostname' % i] = machine.nics[i].hostname + '.servers.csail.mit.edu'
-        data_dict['nic%s_mac' % i] = machine.nics[i].mac_addr
-        data_dict['nic%s_ip' % i] = machine.nics[i].ip
-    if len(machine.nics) == 1:
-        nic_fields = [(x, y.replace('NIC 0 ', '')) for x, y in nic_fields]
-    return nic_fields
-
-def getDiskInfo(data_dict, machine):
-    """Helper function for info, get data on disks for a machine.
-
-    Modifies data_dict to include the relevant data, and returns a list
-    of (key, name) pairs to display "name: data_dict[key]" to the user.
-    """
-    data_dict['num_disks'] = len(machine.disks)
-    disk_fields_template = [('%s_size', '%s size')]
-    disk_fields = []
-    for disk in machine.disks:
-        name = disk.guest_device_name
-        disk_fields.extend([(x % name, y % name) for x, y in disk_fields_template])
-        data_dict['%s_size' % name] = "%0.1f GB" % (disk.size / 1024.)
-    return disk_fields
-
-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 command(user, fields):
-    """Handler for running commands like boot and delete on a VM."""
-    print >> sys.stderr, time.time()-start_time
-    machine = 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:
-            remctl('control', machine.name, 'reboot', cdrom)
-        else:
-            remctl('control', machine.name, 'reboot')
-    elif action == 'Power on':
-        if maxMemory(user) < 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':
-        remctl('control', machine.name, 'destroy')
-    elif action == 'Shutdown':
-        remctl('control', machine.name, 'shutdown')
-    elif action == 'Delete VM':
-        deleteVM(machine)
-    print >> sys.stderr, time.time()-start_time
-
-    d = dict(user=user,
-             command=action,
-             machine=machine)
-    return Template(file="command.tmpl", searchList=[d, global_dict])
-
-def testAdmin(user, admin, machine):
-    if admin in (None, machine.administrator):
-        return None
-    if admin == user.username:
-        return admin
-    if getafsgroups.checkAfsGroup(user.username, admin, 'athena.mit.edu'):
-        return admin
-    if getafsgroups.checkAfsGroup(user.username, 'system:'+admin, 'athena.mit.edu'):
-        return 'system:'+admin
-    raise InvalidInput('admin', admin, 
-                       'You must control the group you move it to')
-    
-def testOwner(user, owner, machine):
-    if owner in (None, machine.owner):
-        return None
-    #XXX should you be able to transfer ownership if you don't already own it?
-    #if not owns(user, machine):
-    #    raise InvalidInput('owner', owner, "You don't own this machine, so you can't  transfer ownership")
-    value = getafsgroups.checkLockerOwner(user.username, owner, verbose=True)
-    if value == True:
-        return owner
-    raise InvalidInput('owner', owner, value)
-
-def testContact(user, contact, machine=None):
-    if contact in (None, machine.contact):
-        return None
-    if not re.match("^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$", contact, re.I):
-        raise InvalidInput('contact', contact, "Not a valid email")
-    return contact
-
-def testDisk(user, disksize, machine=None):
-    return disksize
-
-def testName(user, name, machine=None):
-    if name in (None, machine.name):
-        return None
-    if not Machine.select_by(name=name):
-        return name
-    raise InvalidInput('name', name, "Already taken")
-
-def testHostname(user, hostname, machine):
-    for nic in machine.nics:
-        if hostname == nic.hostname:
-            return hostname
-    # check if doesn't already exist
-    if NIC.select_by(hostname=hostname):
-        raise InvalidInput('hostname', hostname,
-                           "Already exists")
-    if not re.match("^[A-Z0-9-]{1,22}$", hostname, re.I):
-        raise InvalidInput('hostname', hostname, "Not a valid hostname; must only use number, letters, and dashes.")
-    return hostname
-
-def modify(user, fields):
-    """Handler for modifying attributes of a machine."""
-
-    olddisk = {}
-    transaction = ctx.current.create_transaction()
-    try:
-        machine = testMachineId(user, fields.getfirst('machine_id'))
-        owner = testOwner(user, fields.getfirst('owner'), machine)
-        admin = testAdmin(user, fields.getfirst('administrator'), machine)
-        contact = testContact(user, fields.getfirst('contact'), machine)
-        hostname = testHostname(owner, fields.getfirst('hostname'), machine)
-        name = testName(user, fields.getfirst('name'), machine)
-        oldname = machine.name
-        command="modify"
-
-        memory = fields.getfirst('memory')
-        if memory is not None:
-            memory = validMemory(user, memory, machine, on=False)
-            machine.memory = memory
- 
-        disksize = testDisk(user, fields.getfirst('disk'))
-        if disksize is not None:
-            disksize = validDisk(user, disksize, machine)
-            disk = machine.disks[0]
-            if disk.size != disksize:
-                olddisk[disk.guest_device_name] = disksize
-                disk.size = disksize
-                ctx.current.save(disk)
-        
-        # XXX first NIC gets hostname on change?  Interface doesn't support more.
-        for nic in machine.nics[:1]:
-            nic.hostname = hostname
-            ctx.current.save(nic)
-
-        if owner is not None:
-            machine.owner = owner
-        if name is not None:
-            machine.name = name
-        if admin is not None:
-            machine.administrator = admin
-        if contact is not None:
-            machine.contact = contact
-            
-        ctx.current.save(machine)
-        transaction.commit()
-    except:
-        transaction.rollback()
-        raise
-    for diskname in olddisk:
-        remctl("web", "lvresize", oldname, diskname, str(olddisk[diskname]))
-    if name is not None:
-        for disk in machine.disks:
-            remctl("web", "lvrename", oldname, disk.guest_device_name, name)
-        remctl("web", "moveregister", oldname, name)
-    d = dict(user=user,
-             command=command,
-             machine=machine)
-    return Template(file="command.tmpl", searchList=[d, global_dict])    
-
-
-def help(user, fields):
-    """Handler for help messages."""
-    simple = fields.getfirst('simple')
-    subjects = fields.getlist('subject')
-    
-    mapping = dict(paravm_console="""
-ParaVM machines do not support console access over VNC.  To access
-these machines, you either need to boot with a liveCD and ssh in or
-hope that the sipb-xen maintainers add support for serial consoles.""",
-                   hvm_paravm="""
-HVM machines use the virtualization features of the processor, while
-ParaVM machines use Xen's emulation of virtualization features.  You
-want an HVM virtualized machine.""",
-                   cpu_weight="""Don't ask us!  We're as mystified as you are.""",
-                   owner="""The owner field is used to determine <a href="help?subject=quotas">quotas</a>.  It must be the name
-of a locker that you are an AFS administrator of.  In particular, you
-or an AFS group you are a member of must have AFS rlidwka bits on the
-locker.  You can check see who administers the LOCKER locker using the
-command 'fs la /mit/LOCKER' on Athena.)  See also <a href="help?subject=administrator">administrator</a>.""",
-                   administrator="""The administrator field determines who can access the console and power on and off the machine.  This can be either a user or a moira group.""",
-                   quotas="""Quotas are determined on a per-locker basis.  Each 
-quota may have a maximum of 512 megabytes of active ram, 50 gigabytes of disk, and 4 active machines."""
-
-                   )
-    
-    if not subjects:
-        subjects = sorted(mapping.keys())
-        
-    d = dict(user=user,
-             simple=simple,
-             subjects=subjects,
-             mapping=mapping)
-    
-    return Template(file="help.tmpl", searchList=[d, global_dict])
-    
-
-def info(user, fields):
-    """Handler for info on a single VM."""
-    machine = testMachineId(user, fields.getfirst('machine_id'))
-    status = statusInfo(machine)
-    has_vnc = hasVnc(status)
-    if status is None:
-        main_status = dict(name=machine.name,
-                           memory=str(machine.memory))
-        uptime=None
-        cputime=None
-    else:
-        main_status = dict(status[1:])
-        start_time = float(main_status.get('start_time', 0))
-        uptime = datetime.timedelta(seconds=int(time.time()-start_time))
-        cpu_time_float = float(main_status.get('cpu_time', 0))
-        cputime = datetime.timedelta(seconds=int(cpu_time_float))
-    display_fields = """name uptime memory state cpu_weight on_reboot 
-     on_poweroff on_crash on_xend_start on_xend_stop bootloader""".split()
-    display_fields = [('name', 'Name'),
-                      ('owner', 'Owner'),
-                      ('administrator', 'Administrator'),
-                      ('contact', 'Contact'),
-                      ('type', 'Type'),
-                      'NIC_INFO',
-                      ('uptime', 'uptime'),
-                      ('cputime', 'CPU usage'),
-                      ('memory', 'RAM'),
-                      'DISK_INFO',
-                      ('state', 'state (xen format)'),
-                      ('cpu_weight', 'CPU weight'+helppopup('cpu_weight')),
-                      ('on_reboot', 'Action on VM reboot'),
-                      ('on_poweroff', 'Action on VM poweroff'),
-                      ('on_crash', 'Action on VM crash'),
-                      ('on_xend_start', 'Action on Xen start'),
-                      ('on_xend_stop', 'Action on Xen stop'),
-                      ('bootloader', 'Bootloader options'),
-                      ]
-    fields = []
-    machine_info = {}
-    machine_info['name'] = machine.name
-    machine_info['type'] = machine.type.hvm and 'HVM' or 'ParaVM'
-    machine_info['owner'] = machine.owner
-    machine_info['administrator'] = machine.administrator
-    machine_info['contact'] = machine.contact
-
-    nic_fields = getNicInfo(machine_info, machine)
-    nic_point = display_fields.index('NIC_INFO')
-    display_fields = display_fields[:nic_point] + nic_fields + display_fields[nic_point+1:]
-
-    disk_fields = getDiskInfo(machine_info, machine)
-    disk_point = display_fields.index('DISK_INFO')
-    display_fields = display_fields[:disk_point] + disk_fields + display_fields[disk_point+1:]
-    
-    main_status['memory'] += ' MB'
-    for field, disp in display_fields:
-        if field in ('uptime', 'cputime') and locals()[field] is not None:
-            fields.append((disp, locals()[field]))
-        elif field in machine_info:
-            fields.append((disp, machine_info[field]))
-        elif field in main_status:
-            fields.append((disp, main_status[field]))
-        else:
-            pass
-            #fields.append((disp, None))
-    max_mem = maxMemory(user, machine)
-    max_disk = maxDisk(user, machine)
-    d = dict(user=user,
-             cdroms=CDROM.select(),
-             on=status is not None,
-             machine=machine,
-             has_vnc=has_vnc,
-             uptime=str(uptime),
-             ram=machine.memory,
-             max_mem=max_mem,
-             max_disk=max_disk,
-             owner_help=helppopup("owner"),
-             fields = fields)
-    return Template(file='info.tmpl',
-                   searchList=[d, global_dict])
-
-mapping = dict(list=listVms,
-               vnc=vnc,
-               command=command,
-               modify=modify,
-               info=info,
-               create=create,
-               help=help)
-
-if __name__ == '__main__':
-    start_time = time.time()
-    fields = cgi.FieldStorage()
-    class User:
-        username = "moo"
-        email = 'moo@cow.com'
-    u = User()
-    g = Global(u)
-    if 'SSL_CLIENT_S_DN_Email' in os.environ:
-        username = os.environ[ 'SSL_CLIENT_S_DN_Email'].split("@")[0]
-        u.username = username
-        u.email = os.environ[ 'SSL_CLIENT_S_DN_Email']
-    else:
-        u.username = 'moo'
-        u.email = 'nobody'
-    connect('postgres://sipb-xen@sipb-xen-dev/sipb_xen')
-    operation = os.environ.get('PATH_INFO', '')
-    if not operation:
-        print "Status: 301 Moved Permanently"
-        print 'Location: ' + os.environ['SCRIPT_NAME']+'/\n'
-        sys.exit(0)
-
-    if operation.startswith('/'):
-        operation = operation[1:]
-    if not operation:
-        operation = 'list'
-
-    def badOperation(u, e):
-        raise CodeError("Unknown operation")
-
-    fun = mapping.get(operation, badOperation)
-    if fun not in (help, ):
-        connect('postgres://sipb-xen@sipb-xen-dev/sipb_xen')
-    try:
-        output = fun(u, fields)
-        print 'Content-Type: text/html\n'
-        sys.stderr=sys.stdout
-        errio.seek(0)
-        e = errio.read()
-        if e:
-            output = str(output)
-            output = output.replace('<body>', '<body><p>STDERR:</p><pre>'+e+'</pre>')
-        print output
-    except CodeError, err:
-        print 'Content-Type: text/html\n'
-        sys.stderr=sys.stdout
-        errio.seek(0)
-        e = errio.read()
-        print error(operation, u, fields, err, e)
-    except InvalidInput, err:
-        print 'Content-Type: text/html\n'
-        sys.stderr=sys.stdout
-        errio.seek(0)
-        e = errio.read()
-        print invalidInput(operation, u, fields, err, e)
-    except:
-        print 'Content-Type: text/plain\n'
-        sys.stderr=sys.stdout
-        errio.seek(0)
-        e = errio.read()
-        print e
-        print '----'
-        raise