import os
import string
import subprocess
+import re
import time
import cPickle
import base64
+import sha
+import hmac
+import datetime
print 'Content-Type: text/html\n'
sys.stderr = sys.stdout
from sipb_xen_database import *
import random
+class MyException(Exception):
+ pass
+
# ... and stolen from xend/uuid.py
def randomUUID():
"""Generate a random UUID."""
return "-".join(["%02x" * 4, "%02x" * 2, "%02x" * 2, "%02x" * 2,
"%02x" * 6]) % tuple(u)
-
-def maxMemory(user):
+def maxMemory(user, machine=None):
return 256
+def maxDisk(user, machine=None):
+ return 10.0
+
def haveAccess(user, machine):
return True
-
-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):
+ d = dict(op=op, user=user, errorMessage=str(err))
+ print Template(file='error.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)
-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 MyException("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 kws.get('err'):
+ return p.stdout.read(), p.stderr.read()
if p.wait():
print >> sys.stderr, 'ERROR on remctl ', args
print >> sys.stderr, p.stderr.read()
+ return p.stdout.read()
def makeDisks():
- remctl('lvcreate','all')
+ """Update the lvm partitions to include all disks in the database."""
+ remctl('web', 'lvcreate')
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('web', 'vmboot', machine.name,
cdtype)
else:
- remctl('vmboot', 'cdrom', str(machine.name))
+ remctl('web', 'vmboot', machine.name)
+
+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):
+ """Return a dictionary mapping machine names to uptime strings"""
+ value_string = remctl('web', 'listvms')
+ lines = value_string.splitlines()
+ d = {}
+ for line in lines[1:]:
+ lst = line.split()
+ name, id = lst[:2]
+ uptime = ' '.join(lst[2:])
+ d[name] = uptime
+ return d
+
+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,))
+ 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))
+ 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:
transaction.rollback()
raise
makeDisks()
+ registerMachine(machine)
# tell it to boot with cdrom
bootMachine(machine, cdrom)
def create(user, fields):
name = fields.getfirst('name')
if not validMachineName(name):
- return error('create', user, fields,
- "Invalid name '%s'" % name)
- name = name.lower()
+ raise MyException("Invalid name '%s'" % name)
+ name = user.username + '_' + name.lower()
if Machine.get_by(name=name):
- return error('create', user, fields,
- "A machine named '%s' already exists" % name)
+ raise MyException("A machine named '%s' already exists" % name)
memory = fields.getfirst('memory')
try:
if memory <= 0:
raise ValueError
except ValueError:
- return error('create', user, fields,
- "Invalid memory amount")
+ raise MyException("Invalid memory amount")
if memory > maxMemory(user):
- return error('create', user, fields,
- "Too much memory requested")
+ raise MyException("Too much memory requested")
disk = fields.getfirst('disk')
try:
disk = float(disk)
+ if disk > maxDisk(user):
+ raise MyException("Too much disk requested")
disk = int(disk * 1024)
if disk <= 0:
raise ValueError
except ValueError:
- return error('create', user, fields,
- "Invalid disk amount")
+ raise MyException("Invalid disk amount")
vm_type = fields.getfirst('vmtype')
if vm_type not in ('hvm', 'paravm'):
- return error('create', user, fields,
- "Invalid vm type '%s'" % vm_type)
+ raise MyException("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)
+ raise MyException("Invalid cdrom type '%s'" % cdrom)
machine = createVm(user, name, memory, disk, is_hvm, cdrom)
if isinstance(machine, basestring):
- return error('create', user, fields,
- machine)
+ raise MyException(machine)
d = dict(user=user,
machine=machine)
print Template(file='create.tmpl',
def listVms(user, fields):
machines = Machine.select()
+ on = {}
+ has_vnc = {}
+ uptimes = getUptimes(machines)
+ on = has_vnc = uptimes
+ # for m in machines:
+ # status = statusInfo(m)
+ # on[m.name] = status is not None
+ # has_vnc[m.name] = hasVnc(status)
d = dict(user=user,
+ maxmem=maxMemory(user),
+ maxdisk=maxDisk(user),
machines=machines,
+ has_vnc=has_vnc,
+ uptimes=uptimes,
cdroms=CDROM.select())
-
print Template(file='list.tmpl', searchList=d)
def testMachineId(user, machineId, exists=True):
if machineId is None:
- error('vnc', user, fields,
- "No machine ID specified")
- return False
+ raise MyException("No machine ID specified")
try:
machineId = int(machineId)
except ValueError:
- error('vnc', user, fields,
- "Invalid machine ID '%s'"
- % machineId)
- return False
+ raise MyException("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
+ raise MyException("No such machine ID '%s'" % machineId)
if not haveAccess(user, machine):
- error('vnc', user, fields,
- "No access to machine ID '%s'"
- % machineId)
- return False
+ raise MyException("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
+ """
machine = testMachineId(user, fields.getfirst('machine_id'))
- if machine is None: #gave error page already
- return
+ #XXX fix
TOKEN_KEY = "0M6W0U1IXexThi5idy8mnkqPKEq1LtEnlK/pZSn0cDrN"
data = {}
- data["user"] = user
- data["machine"]=machine
+ 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)
d = dict(user=user,
machine=machine,
- hostname='localhost',
+ hostname=os.environ.get('SERVER_NAME', 'localhost'),
authtoken=token)
print Template(file='vnc.tmpl',
searchList=d)
+def getNicInfo(data_dict, machine):
+ 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):
+ 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):
+ 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):
+ 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 MyException("Invalid cdrom type '%s'" % cdrom)
+ if action not in ('Reboot', 'Power on', 'Power off', 'Shutdown', 'Delete VM'):
+ raise MyException("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':
+ 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)
+
+def modify(user, fields):
+ machine = testMachineId(user, fields.getfirst('machine_id'))
+
+
def info(user, fields):
machine = testMachineId(user, fields.getfirst('machine_id'))
- if machine is None: #gave error page already
- return
+ 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'),
+ 'NIC_INFO',
+ ('uptime', 'uptime'),
+ ('cputime', 'CPU usage'),
+ ('memory', 'RAM'),
+ 'DISK_INFO',
+ ('state', 'state (xen format)'),
+ ('cpu_weight', '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['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 main_status:
+ fields.append((disp, main_status[field]))
+ elif field in machine_info:
+ fields.append((disp, machine_info[field]))
+ else:
+ pass
+ #fields.append((disp, None))
+
d = dict(user=user,
- machine=machine)
+ cdroms=CDROM.select(),
+ on=status is not None,
+ machine=machine,
+ has_vnc=has_vnc,
+ uptime=str(uptime),
+ ram=machine.memory,
+ maxmem=maxMemory(user, machine),
+ maxdisk=maxDisk(user, machine),
+ fields = fields)
print Template(file='info.tmpl',
searchList=d)
mapping = dict(list=listVms,
vnc=vnc,
+ command=command,
+ modify=modify,
info=info,
create=create)
if __name__ == '__main__':
+ start_time = time.time()
fields = cgi.FieldStorage()
- class C:
+ class User:
username = "moo"
email = 'moo@cow.com'
- u = C()
+ u = User()
connect('postgres://sipb-xen@sipb-xen-dev/sipb_xen')
operation = os.environ.get('PATH_INFO', '')
+ if not operation:
+ pass
+ #XXX do redirect
+
if operation.startswith('/'):
operation = operation[1:]
if not operation:
fun = mapping.get(operation,
lambda u, e:
error(operation, u, e,
- "Invalid operation '%'" % operation))
- fun(u, fields)
+ "Invalid operation '%s'" % operation))
+ try:
+ fun(u, fields)
+ except MyException, err:
+ error(operation, u, fields, err)
projects / invirt/packages/invirt-web.git / blobdiff