import base64
import sha
import hmac
+import datetime
-print 'Content-Type: text/html\n'
sys.stderr = sys.stdout
sys.path.append('/home/ecprice/.local/lib/python2.5/site-packages')
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).
+ """
+ pass
+
+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>'
+
+
+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)
-def maxMemory(user):
- return 256
+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(owner):
+ """Return the machines owned by a given owner."""
+ return Machine.select_by(owner=owner)
+
+def maxMemory(user, machine=None, on=None):
+ """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 a dictionary from machines to booleans, whether a machine is
+ on. If None, it is recomputed. XXX make this global?
+ """
-def maxDisk(user):
- return 10.0
+ machines = getMachinesByOwner(user.username)
+ if on is None:
+ on = getUptimes(machines)
+ active_machines = [x for x in machines if on[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.username)
+ 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, on=None):
+ machines = getMachinesByOwner(user.username)
+ if on is None:
+ on = getUptimes(machines)
+ active_machines = [x for x in machines if on[x]]
+ return (len(machines) < MAX_VMS_TOTAL and
+ len(active_machines) < MAX_VMS_ACTIVE)
def haveAccess(user, machine):
- return True
+ """Return whether a user has access to a machine"""
+ if user.username == 'moo':
+ return True
+ return machine.owner == user.username
def error(op, user, fields, err):
+ """Print an error page when a CodeError occurs"""
d = dict(op=op, user=user, errorMessage=str(err))
- print Template(file='error.tmpl', searchList=d);
+ print Template(file='error.tmpl', searchList=[d, global_dict]);
def validMachineName(name):
"""Check that name is valid for a machine name"""
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(username = 'tabbott/extra', keytab = '/etc/tabbott.keytab'):
"""Kinit with a given username and keytab"""
- p = subprocess.Popen(['kinit', "-k", "-t", keytab, username])
+ p = subprocess.Popen(['kinit', "-k", "-t", keytab, username],
+ stderr=subprocess.PIPE)
e = p.wait()
if e:
- raise MyException("Error %s in kinit" % e)
+ raise CodeError("Error %s in kinit: %s" % (e, p.stderr.read()))
def checkKinit():
"""If we lack tickets, kinit."""
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 %s: %s' %
+ (args, p.stderr.read()))
return p.stdout.read()
def makeDisks():
"""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.
if v == '(':
stack.append([])
elif v == ')':
+ if len(stack[-1]) == 1:
+ stack[-1].append('')
stack[-2].append(stack[-1])
stack.pop()
else:
stack[-1].extend(v.split())
return stack[-1]
+def getUptimes(machines):
+ """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('list-long', machine.name, err=True)
if 'Unknown command' in err_string:
- raise MyException("ERROR in remctl list-long %s is not registered" % (machine.name,))
+ 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 MyException("ERROR in remctl list-long %s: %s" % (machine.name, 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:
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("Too much memory requested")
+ if disk > maxDisk(user) * 1024:
+ raise InvalidInput("Too much disk requested")
+ if not canAddVm(user):
+ raise InvalidInput("Too many VMs requested")
res = meta.engine.execute('select nextval(\'"machines_machine_id_seq"\')')
id = res.fetchone()[0]
machine = Machine()
'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"
+ raise CodeError("No IP addresses left! Contact sipb-xen-dev@mit.edu")
nic = open[0]
nic.machine_id = machine.machine_id
nic.hostname = name
except:
transaction.rollback()
raise
- makeDisks()
registerMachine(machine)
+ makeDisks()
# tell it to boot with cdrom
bootMachine(machine, cdrom)
return machine
-def create(user, fields):
- name = fields.getfirst('name')
- if not validMachineName(name):
- raise MyException("Invalid name '%s'" % name)
- name = name.lower()
-
- if Machine.get_by(name=name):
- raise MyException("A machine named '%s' already exists" % name)
-
- memory = fields.getfirst('memory')
+def validMemory(user, memory, machine=None):
+ """Parse and validate limits for memory for a given user and machine."""
try:
memory = int(memory)
- if memory <= 0:
+ if memory < MIN_MEMORY_SINGLE:
raise ValueError
except ValueError:
- raise MyException("Invalid memory amount")
- if memory > maxMemory(user):
- raise MyException("Too much memory requested")
-
- disk = fields.getfirst('disk')
+ raise InvalidInput("Invalid memory amount; must be at least %s MB" %
+ MIN_MEMORY_SINGLE)
+ if memory > maxMemory(user, machine):
+ raise InvalidInput("Too much memory requested")
+ 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("Too much disk requested")
disk = int(disk * 1024)
- if disk <= 0:
+ if disk < MIN_DISK_SINGLE * 1024:
raise ValueError
except ValueError:
- raise MyException("Invalid disk amount")
- if disk > maxDisk(user):
- raise MyException("Too much disk requested")
+ raise InvalidInput("Invalid disk amount; minimum is %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("Invalid name '%s'" % name)
+ name = user.username + '_' + name.lower()
+
+ if Machine.get_by(name=name):
+ raise InvalidInput("A machine named '%s' already exists" % name)
+ memory = fields.getfirst('memory')
+ memory = validMemory(user, memory)
+
+ disk = fields.getfirst('disk')
+ disk = validDisk(user, disk)
+
vm_type = fields.getfirst('vmtype')
if vm_type not in ('hvm', 'paravm'):
- raise MyException("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):
- raise MyException("Invalid cdrom type '%s'" % cdrom)
+ raise CodeError("Invalid cdrom type '%s'" % cdrom)
machine = createVm(user, name, memory, disk, is_hvm, cdrom)
- if isinstance(machine, basestring):
- raise MyException(machine)
d = dict(user=user,
machine=machine)
print Template(file='create.tmpl',
- searchList=d);
+ searchList=[d, global_dict]);
def listVms(user, fields):
- machines = Machine.select()
- status = statusInfo(machines)
+ """Handler for list requests."""
+ machines = [m for m in Machine.select() if haveAccess(user, m)]
+ on = {}
has_vnc = {}
+ uptimes = getUptimes(machines)
+ on = uptimes
for m in machines:
- on[m.name] = status[m.name] is not None
- has_vnc[m.name] = hasVnc(status[m.name])
+ 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, on=on)
+ max_disk=maxDisk(user)
d = dict(user=user,
- maxmem=maxMemory(user),
- maxdisk=maxDisk(user),
+ can_add_vm=canAddVm(user, on=on),
+ max_mem=max_mem,
+ max_disk=max_disk,
+ default_mem=max_mem,
+ default_disk=min(4.0, max_disk),
machines=machines,
- status=status,
has_vnc=has_vnc,
+ uptimes=uptimes,
cdroms=CDROM.select())
- print Template(file='list.tmpl', searchList=d)
+ print 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 MyException("No machine ID specified")
+ raise CodeError("No machine ID specified")
try:
machineId = int(machineId)
except ValueError:
- raise MyException("Invalid machine ID '%s'" % machineId)
+ raise CodeError("Invalid machine ID '%s'" % machineId)
machine = Machine.get(machineId)
if exists and machine is None:
- raise MyException("No such machine ID '%s'" % machineId)
- if not haveAccess(user, machine):
- raise MyException("No access to machine ID '%s'" % machineId)
+ 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):
-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'))
- #XXX fix
TOKEN_KEY = "0M6W0U1IXexThi5idy8mnkqPKEq1LtEnlK/pZSn0cDrN"
data = {}
- data["user"] = user
+ data["user"] = user.username
data["machine"]=machine.name
data["expires"]=time.time()+(5*60)
pickledData = cPickle.dumps(data)
hostname=os.environ.get('SERVER_NAME', 'localhost'),
authtoken=token)
print Template(file='vnc.tmpl',
- searchList=d)
+ searchList=[d, global_dict])
-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."""
+ 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 time.time()-start_time
machine = testMachineId(user, fields.getfirst('machine_id'))
+ action = fields.getfirst('action')
+ cdrom = fields.getfirst('cdrom')
+ print 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('reboot', machine.name, cdrom)
+ else:
+ remctl('reboot', machine.name)
+ elif action == 'Power on':
+ if maxMemory(user) < machine.memory:
+ raise InvalidInput("You don't have enough free RAM quota")
+ bootMachine(machine, cdrom)
+ elif action == 'Power off':
+ remctl('destroy', machine.name)
+ elif action == 'Shutdown':
+ remctl('shutdown', machine.name)
+ elif action == 'Delete VM':
+ deleteVM(machine)
+ print time.time()-start_time
+
d = dict(user=user,
+ command=action,
machine=machine)
+ print Template(file="command.tmpl", searchList=[d, global_dict])
+
+def modify(user, fields):
+ """Handler for modifying attributes of a machine."""
+ #XXX not written yet
+ machine = testMachineId(user, fields.getfirst('machine_id'))
+
+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.""")
+
+ d = dict(user=user,
+ simple=simple,
+ subjects=subjects,
+ mapping=mapping)
+
+ print 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))
+ 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'),
+ ('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['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'):
+ 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,
+ fields = fields)
print Template(file='info.tmpl',
- searchList=d)
+ searchList=[d, global_dict])
mapping = dict(list=listVms,
vnc=vnc,
+ command=command,
+ modify=modify,
info=info,
- create=create)
+ create=create,
+ help=help)
if __name__ == '__main__':
+ start_time = time.time()
fields = cgi.FieldStorage()
- class C:
+ class User:
username = "moo"
email = 'moo@cow.com'
- u = C()
+ u = User()
+ 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', '')
+ #print 'Content-Type: text/plain\n'
+ #print operation
if not operation:
- pass
- #XXX do redirect
+ print "Status: 301 Moved Permanently"
+ print 'Location: ' + os.environ['SCRIPT_NAME']+'/\n'
+ sys.exit(0)
+ print 'Content-Type: text/html\n'
if operation.startswith('/'):
operation = operation[1:]
fun = mapping.get(operation,
lambda u, e:
error(operation, u, e,
- "Invalid operation '%'" % operation))
+ "Invalid operation '%s'" % operation))
+ if fun not in (help, ):
+ connect('postgres://sipb-xen@sipb-xen-dev/sipb_xen')
try:
fun(u, fields)
- except MyException, err:
+ except CodeError, err:
+ error(operation, u, fields, err)
+ except InvalidInput, err:
error(operation, u, fields, err)
projects / invirt/packages/invirt-web.git / blobdiff