#!/usr/bin/python
+"""Main CGI script for web interface"""
-import sys
+import base64
+import cPickle
import cgi
+import datetime
+import getafsgroups
+import hmac
import os
+import random
+import re
+import sha
+import simplejson
import string
import subprocess
+import sys
import time
-import cPickle
-import base64
+from StringIO import StringIO
+
+
+def revertStandardError():
+ """Move stderr to stdout, and return the contents of the old stderr."""
+ errio = sys.stderr
+ if not isinstance(errio, StringIO):
+ return None
+ sys.stderr = sys.stdout
+ errio.seek(0)
+ return errio.read()
+
+def printError():
+ """Revert stderr to stdout, and print the contents of stderr"""
+ if isinstance(sys.stderr, StringIO):
+ print revertStandardError()
+
+if __name__ == '__main__':
+ import atexit
+ atexit.register(printError)
+ sys.stderr = StringIO()
-print 'Content-Type: text/html\n'
-sys.stderr = sys.stdout
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
+
+def helppopup(subj):
+ """Return HTML code for a (?) link to a specified help topic"""
+ return ('<span class="helplink"><a href="help?subject=' + subj +
+ '&simple=true" target="_blank" ' +
+ 'onclick="return helppopup(\'' + subj + '\')">(?)</a></span>')
+
+class Global(object):
+ """Global state of the system, to avoid duplicate remctls to get state"""
+ 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)
+
+ def clear(self):
+ """Clear the state so future accesses reload it."""
+ for attr in ('_uptimes', ):
+ if hasattr(self, attr):
+ delattr(self, attr)
+
+g = None
+
+class User:
+ """User class (sort of useless, I admit)"""
+ def __init__(self, username, email):
+ self.username = username
+ self.email = email
+
+def makeErrorPre(old, addition):
+ if addition is None:
+ return
+ if old:
+ return old[:-6] + '\n----\n' + str(addition) + '</pre>'
+ else:
+ return '<p>STDERR:</p><pre>' + str(addition) + '</pre>'
+
+Template.helppopup = staticmethod(helppopup)
+Template.err = None
+
+class JsonDict:
+ """Class to store a dictionary that will be converted to JSON"""
+ def __init__(self, **kws):
+ self.data = kws
+ if 'err' in kws:
+ err = kws['err']
+ del kws['err']
+ self.addError(err)
+
+ def __str__(self):
+ return simplejson.dumps(self.data)
+
+ def addError(self, text):
+ """Add stderr text to be displayed on the website."""
+ self.data['err'] = \
+ makeErrorPre(self.data.get('err'), text)
+
+class Defaults:
+ """Class to store default values for fields."""
+ memory = 256
+ disk = 4.0
+ cdrom = ''
+ name = ''
+ vmtype = 'hvm'
+ def __init__(self, max_memory=None, max_disk=None, **kws):
+ if max_memory is not None:
+ self.memory = min(self.memory, max_memory)
+ if max_disk is not None:
+ self.max_disk = min(self.disk, max_disk)
+ for key in kws:
+ setattr(self, key, kws[key])
+
+
+
+default_headers = {'Content-Type': 'text/html'}
# ... and stolen from xend/uuid.py
def randomUUID():
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.
-def maxMemory(user):
- return 256
+ 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 cantAddVm(user):
+ machines = getMachinesByOwner(user)
+ active_machines = [x for x in machines if g.uptimes[x]]
+ if len(machines) >= 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 haveAccess(user, machine):
- return True
+ """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, errorMessage):
- d = dict(op=op,
- user=user,
- errorMessage=errorMessage)
- print Template(file='error.tmpl',
- searchList=d);
+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]);
+
+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]);
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] == '-' or len(name) > 22:
+ charset = string.ascii_letters + string.digits + '-_'
+ if name[0] in '-_' or len(name) > 22:
return False
- return all(x in charset for x in name)
+ for x in name:
+ if x not in charset:
+ return False
+ return True
-def kinit():
- keytab = '/etc/tabbott.keytab'
- username = 'tabbott/extra'
- p = subprocess.Popen(['kinit', "-k", "-t", keytab,
- username])
- p.wait()
+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):
+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 p.wait():
- print >> sys.stderr, 'ERROR on remctl ', args
+ 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 makeDisks():
- remctl('lvcreate','all')
+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('vmboot', 'cdrom', str(machine.name),
+ remctl('control', machine.name, 'create',
cdtype)
else:
- remctl('vmboot', 'cdrom', str(machine.name))
+ 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:
- res = meta.engine.execute('select nextval(\'"machines_machine_id_seq"\')')
+ 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))
+ reason = cantAddVm(user)
+ if reason:
+ raise InvalidInput('create', True, reason)
+ 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
ctx.current.save(machine)
disk = Disk(machine.machine_id,
'hda', disk)
- open = NIC.select_by(machine_id=None)
- if not open: #No IPs left!
- return "No IP addresses left! Contact sipb-xen-dev@mit.edu"
- nic = open[0]
+ 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)
except:
transaction.rollback()
raise
- makeDisks()
+ registerMachine(machine)
+ makeDisks(machine)
# tell it to boot with cdrom
bootMachine(machine, cdrom)
return machine
-def create(user, fields):
- name = fields.getfirst('name')
- if not validMachineName(name):
- return error('create', user, fields,
- "Invalid name '%s'" % name)
- name = name.lower()
+def validMemory(user, memory, machine=None, on=True):
+ """Parse and validate limits for memory for a given user and machine.
- if Machine.get_by(name=name):
- return error('create', user, fields,
- "A machine named '%s' already exists" % name)
-
- memory = fields.getfirst('memory')
+ on is whether the memory must be valid after the machine is
+ switched on.
+ """
try:
memory = int(memory)
- if memory <= 0:
+ if memory < MIN_MEMORY_SINGLE:
raise ValueError
except ValueError:
- return error('create', user, fields,
- "Invalid memory amount")
- if memory > maxMemory(user):
- return error('create', user, fields,
- "Too much memory requested")
-
- disk = fields.getfirst('disk')
+ 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 <= 0:
+ if disk < MIN_DISK_SINGLE * 1024:
raise ValueError
except ValueError:
- return error('create', user, fields,
- "Invalid disk amount")
+ raise InvalidInput('disk', disk,
+ "Minimum %s GB" % MIN_DISK_SINGLE)
+ return disk
+
+def parseCreate(user, fields):
+ name = fields.getfirst('name')
+ if not validMachineName(name):
+ raise InvalidInput('name', name, 'You must provide a machine name.')
+ name = name.lower()
+
+ if Machine.get_by(name=name):
+ raise InvalidInput('name', 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'):
- return error('create', user, fields,
- "Invalid vm type '%s'" % vm_type)
+ 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):
- return error('create', user, fields,
- "Invalid cdrom type '%s'" % cdrom)
-
- machine = createVm(user, name, memory, disk, is_hvm, cdrom)
- if isinstance(machine, basestring):
- return error('create', user, fields,
- machine)
- d = dict(user=user,
- machine=machine)
- print Template(file='create.tmpl',
- searchList=d);
+ raise CodeError("Invalid cdrom type '%s'" % cdrom)
+ return dict(user=user, name=name, memory=memory, disk=disk,
+ is_hvm=is_hvm, cdrom=cdrom)
-def listVms(user, fields):
- machines = Machine.select()
+def create(user, fields):
+ """Handler for create requests."""
+ js = fields.getfirst('js')
+ try:
+ parsed_fields = parseCreate(user, fields)
+ machine = createVm(**parsed_fields)
+ except InvalidInput, err:
+ if not js:
+ raise
+ else:
+ err = None
+ if not js:
+ d = dict(user=user,
+ machine=machine)
+ return Template(file='create.tmpl', searchList=[d])
+ g.clear() #Changed global state
+ d = getListDict(user)
+ d['err'] = err
+ if err:
+ for field in fields.keys():
+ setattr(d['defaults'], field, fields.getfirst(field))
+ else:
+ d['new_machine'] = parsed_fields['name']
+ t = Template(file='list.tmpl', searchList=[d])
+ return JsonDict(createtable=t.createTable(),
+ machinelist=t.machineList(d['machines']))
+
+
+def getListDict(user):
+ machines = [m for m in Machine.select() if haveAccess(user, m)]
+ on = {}
+ has_vnc = {}
+ on = g.uptimes
+ for m in machines:
+ m.uptime = g.uptimes.get(m)
+ 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_memory = maxMemory(user)
+ max_disk = maxDisk(user)
+ defaults = Defaults(max_memory=max_memory,
+ max_disk=max_disk,
+ cdrom='gutsy-i386')
d = dict(user=user,
+ cant_add_vm=cantAddVm(user),
+ max_memory=max_memory,
+ max_disk=max_disk,
+ defaults=defaults,
machines=machines,
+ has_vnc=has_vnc,
+ uptimes=g.uptimes,
cdroms=CDROM.select())
+ return d
- print Template(file='list.tmpl', searchList=d)
-
+def listVms(user, fields):
+ """Handler for list requests."""
+ d = getListDict(user)
+ t = Template(file='list.tmpl', searchList=[d])
+ js = fields.getfirst('js')
+ if not js:
+ return t
+ if js == 'machinelist':
+ return t.machineList(d['machines'])
+ elif js.startswith('machinerow-'):
+ request_machine_id = int(js.split('-')[1])
+ m = [x for x in d['machines'] if x.id == request_machine_id]
+ return t.machineRow(m)
+ elif js == 'createtable':
+ return t.createTable()
+
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:
- error('vnc', user, fields,
- "No machine ID specified")
- return False
+ raise CodeError("No machine ID specified")
try:
machineId = int(machineId)
except ValueError:
- error('vnc', user, fields,
- "Invalid machine ID '%s'"
- % machineId)
- return False
+ raise CodeError("Invalid machine ID '%s'" % machineId)
machine = Machine.get(machineId)
if exists and machine is None:
- error('vnc', user, fields,
- "No such machine ID '%s'"
- % machineId)
- return False
- if not haveAccess(user, machine):
- error('vnc', user, fields,
- "No access to machine ID '%s'"
- % machineId)
- return False
+ 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'))
- if machine is None: #gave error page already
- return
TOKEN_KEY = "0M6W0U1IXexThi5idy8mnkqPKEq1LtEnlK/pZSn0cDrN"
data = {}
- data["user"] = user
- data["machine"]=machine
- data["expires"]=time.time()+(5*60)
- pickledData = cPickle.dumps(data)
+ data["user"] = user.username
+ data["machine"] = machine.name
+ data["expires"] = time.time()+(5*60)
+ pickled_data = cPickle.dumps(data)
m = hmac.new(TOKEN_KEY, digestmod=sha)
- m.update(pickledData)
- token = {'data': pickledData, 'digest': m.digest()}
+ m.update(pickled_data)
+ token = {'data': pickled_data, '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='localhost',
+ hostname=os.environ.get('SERVER_NAME', 'localhost'),
authtoken=token)
- print Template(file='vnc.tmpl',
- searchList=d)
+ return Template(file='vnc.tmpl', searchList=[d])
-def info(user, fields):
+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 commandResult(user, fields):
+ print >> sys.stderr, time.time()-start_time
machine = testMachineId(user, fields.getfirst('machine_id'))
- if machine is None: #gave error page already
- return
-
+ 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 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':
+ 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)
- print Template(file='info.tmpl',
- searchList=d)
+ return d
+
+def command(user, fields):
+ """Handler for running commands like boot and delete on a VM."""
+ js = fields.getfirst('js')
+ try:
+ d = commandResult(user, fields)
+ except InvalidInput, err:
+ if not js:
+ raise
+ result = None
+ else:
+ err = None
+ result = 'Success!'
+ if not js:
+ return Template(file='command.tmpl', searchList=[d])
+ if js == 'list':
+ g.clear() #Changed global state
+ d = getListDict(user)
+ t = Template(file='list.tmpl', searchList=[d])
+ return JsonDict(createtable=t.createTable(),
+ machinelist=t.machineList(d['machines']),
+ result=result,
+ err=err)
+ elif js == 'info':
+ machine = testMachineId(user, fields.getfirst('machine_id'))
+ d = infoDict(user, machine)
+ t = Template(file='info.tmpl', searchList=[d])
+ return JsonDict(info=t.infoTable(),
+ commands=t.commands(),
+ modify=t.modifyForm(),
+ result=result,
+ err=err)
+ else:
+ raise InvalidInput('js', js, 'Not a known js type.')
+
+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('administrator', admin,
+ 'You must control the group you move it to.')
+
+def testOwner(user, owner, machine):
+ if owner in (None, machine.owner):
+ return None
+ 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}$", contact, re.I):
+ raise InvalidInput('contact', contact, "Not a valid email.")
+ return contact
+
+def testDisk(user, disksize, machine=None):
+ return disksize
+
+def testName(user, name, machine=None):
+ if name in (None, machine.name):
+ return None
+ if not Machine.select_by(name=name):
+ return name
+ raise InvalidInput('name', name, "Name is already taken.")
+
+def testHostname(user, hostname, machine):
+ for nic in machine.nics:
+ if hostname == nic.hostname:
+ return hostname
+ # check if doesn't already exist
+ if NIC.select_by(hostname=hostname):
+ raise InvalidInput('hostname', hostname,
+ "Already exists")
+ if not re.match("^[A-Z0-9-]{1,22}$", hostname, re.I):
+ raise InvalidInput('hostname', hostname, "Not a valid hostname; "
+ "must only use number, letters, and dashes.")
+ return hostname
+
+def modifyDict(user, fields):
+ 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)
+ return dict(user=user,
+ command=command,
+ machine=machine)
+
+def modify(user, fields):
+ """Handler for modifying attributes of a machine."""
+ js = fields.getfirst('js')
+ try:
+ modify_dict = modifyDict(user, fields)
+ except InvalidInput, err:
+ if not js:
+ raise
+ result = ''
+ machine = testMachineId(user, fields.getfirst('machine_id'))
+ else:
+ machine = modify_dict['machine']
+ result='Success!'
+ err = None
+ if not js:
+ return Template(file='command.tmpl', searchList=[modify_dict])
+ info_dict = infoDict(user, machine)
+ info_dict['err'] = err
+ if err:
+ for field in fields.keys():
+ setattr(info_dict['defaults'], field, fields.getfirst(field))
+ t = Template(file='info.tmpl', searchList=[info_dict])
+ return JsonDict(info=t.infoTable(),
+ commands=t.commands(),
+ modify=t.modifyForm(),
+ result=result,
+ err=err)
+
+
+def helpHandler(user, fields):
+ """Handler for help messages."""
+ simple = fields.getfirst('simple')
+ subjects = fields.getlist('subject')
+
+ help_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(help_mapping.keys())
+
+ d = dict(user=user,
+ simple=simple,
+ subjects=subjects,
+ mapping=help_mapping)
+
+ return Template(file="help.tmpl", searchList=[d])
+
+
+def badOperation(u, e):
+ raise CodeError("Unknown operation")
+
+def infoDict(user, machine):
+ 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)
+ defaults=Defaults()
+ for name in 'machine_id name administrator owner memory contact'.split():
+ setattr(defaults, name, getattr(machine, name))
+ if machine.nics:
+ defaults.hostname = machine.nics[0].hostname
+ defaults.disk = "%0.2f" % (machine.disks[0].size/1024.)
+ d = dict(user=user,
+ cdroms=CDROM.select(),
+ on=status is not None,
+ machine=machine,
+ defaults=defaults,
+ 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 d
+
+def info(user, fields):
+ """Handler for info on a single VM."""
+ machine = testMachineId(user, fields.getfirst('machine_id'))
+ d = infoDict(user, machine)
+ return Template(file='info.tmpl', searchList=[d])
mapping = dict(list=listVms,
vnc=vnc,
+ command=command,
+ modify=modify,
info=info,
- create=create)
+ create=create,
+ help=helpHandler)
+
+def printHeaders(headers):
+ for key, value in headers.iteritems():
+ print '%s: %s' % (key, value)
+ print
+
+
+def getUser():
+ """Return the current user based on the SSL environment variables"""
+ if 'SSL_CLIENT_S_DN_Email' in os.environ:
+ username = os.environ['SSL_CLIENT_S_DN_Email'].split("@")[0]
+ return User(username, os.environ['SSL_CLIENT_S_DN_Email'])
+ else:
+ return User('moo', 'nobody')
if __name__ == '__main__':
+ start_time = time.time()
fields = cgi.FieldStorage()
- class C:
- username = "moo"
- email = 'moo@cow.com'
- u = C()
- connect('postgres://sipb-xen@sipb-xen-dev/sipb_xen')
+ u = getUser()
+ g = Global(u)
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'
-
- fun = mapping.get(operation,
- lambda u, e:
- error(operation, u, e,
- "Invalid operation '%'" % operation))
- fun(u, fields)
+
+
+
+ fun = mapping.get(operation, badOperation)
+
+ if fun not in (helpHandler, ):
+ connect('postgres://sipb-xen@sipb-xen-dev.mit.edu/sipb_xen')
+ try:
+ output = fun(u, fields)
+
+ headers = dict(default_headers)
+ if isinstance(output, tuple):
+ new_headers, output = output
+ headers.update(new_headers)
+
+ e = revertStandardError()
+ if e:
+ output.addError(e)
+ printHeaders(headers)
+ print output
+ except Exception, err:
+ if not fields.has_key('js'):
+ if isinstance(err, CodeError):
+ print 'Content-Type: text/html\n'
+ e = revertStandardError()
+ print error(operation, u, fields, err, e)
+ sys.exit(1)
+ if isinstance(err, InvalidInput):
+ print 'Content-Type: text/html\n'
+ e = revertStandardError()
+ print invalidInput(operation, u, fields, err, e)
+ sys.exit(1)
+ print 'Content-Type: text/plain\n'
+ print 'Uh-oh! We experienced an error.'
+ print 'Please email sipb-xen@mit.edu with the contents of this page.'
+ print '----'
+ e = revertStandardError()
+ print e
+ print '----'
+ raise
projects / invirt/packages/invirt-web.git / blobdiff