STDERR:
' + str(addition) + '' + +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]) -global_dict = {} -global_dict['helppopup'] = helppopup +default_headers = {'Content-Type': 'text/html'} + # ... and stolen from xend/uuid.py def randomUUID(): """Generate a random UUID.""" @@ -38,23 +148,95 @@ 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) -def maxMemory(user, machine=None): - 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(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): - return 10.0 + 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 whether a user has adminstrative access to a machine""" if user.username == 'moo': return True - return machine.owner == user.username + 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 error(op, user, fields, err): - d = dict(op=op, user=user, errorMessage=str(err)) - print Template(file='error.tmpl', searchList=[d, global_dict]); +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]); + +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""" @@ -75,7 +257,7 @@ def kinit(username = 'tabbott/extra', keytab = '/etc/tabbott.keytab'): stderr=subprocess.PIPE) e = p.wait() if e: - raise MyException("Error %s in kinit: %s" % (e, p.stderr.read())) + raise CodeError("Error %s in kinit: %s" % (e, p.stderr.read())) def checkKinit(): """If we lack tickets, kinit.""" @@ -93,16 +275,24 @@ def remctl(*args, **kws): + list(args), stdout=subprocess.PIPE, stderr=subprocess.PIPE) + v = p.wait() if kws.get('err'): return p.stdout.read(), p.stderr.read() - if p.wait(): - print >> sys.stderr, 'ERROR on remctl ', args + 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(): - """Update the lvm partitions to include all disks in the database.""" - remctl('web', 'lvcreate') +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. @@ -111,10 +301,10 @@ def bootMachine(machine, cdtype): id of the CD (e.g. 'gutsy_i386') """ if cdtype is not None: - remctl('web', 'vmboot', machine.name, + remctl('control', machine.name, 'create', cdtype) else: - remctl('web', 'vmboot', machine.name) + remctl('control', machine.name, 'create') def registerMachine(machine): """Register a machine to be controlled by the web interface""" @@ -148,30 +338,36 @@ def parseStatus(s): stack[-1].extend(v.split()) return stack[-1] -def getUptimes(machines): +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[1:]: + for line in lines: lst = line.split() name, id = lst[:2] uptime = ' '.join(lst[2:]) d[name] = uptime - return d + 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) + value_string, err_string = remctl('control', machine.name, 'list-long', + 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 @@ -190,13 +386,24 @@ def createVm(user, name, memory, disk, is_hvm, cdrom): # 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 @@ -205,10 +412,11 @@ def createVm(user, name, memory, disk, is_hvm, cdrom): 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) @@ -217,106 +425,166 @@ def createVm(user, name, memory, disk, is_hvm, cdrom): except: transaction.rollback() raise - makeDisks() registerMachine(machine) + makeDisks(machine) # tell it to boot with cdrom bootMachine(machine, cdrom) return machine -def validMemory(user, memory, machine=None): +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 <= 0: + if memory < MIN_MEMORY_SINGLE: raise ValueError except ValueError: - raise MyException("Invalid memory amount") - if memory > maxMemory(user, machine): - raise MyException("Too much memory requested") + 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 MyException("Too much disk requested") + 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: - raise MyException("Invalid disk amount") + raise InvalidInput('disk', disk, + "Minimum %s GB" % MIN_DISK_SINGLE) return disk -def create(user, fields): +def parseCreate(user, fields): name = fields.getfirst('name') if not validMachineName(name): - raise MyException("Invalid name '%s'" % name) - name = user.username + '_' + name.lower() + raise InvalidInput('name', name, 'You must provide a machine name.') + name = name.lower() if Machine.get_by(name=name): - raise MyException("A machine named '%s' already exists" % name) + raise InvalidInput('name', name, + "Name already exists.") memory = fields.getfirst('memory') - memory = validMemory(user, 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 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) - - 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, global_dict]); + 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): +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 = {} - uptimes = getUptimes(machines) - on = uptimes + on = g.uptimes for m in machines: - if not on.get(m.name): - has_vnc[m.name] = 'Off' + m.uptime = g.uptimes.get(m) + if not on[m]: + has_vnc[m] = 'Off' elif m.type.hvm: - has_vnc[m.name] = True + has_vnc[m] = True else: - has_vnc[m.name] = "ParaVM"+helppopup("paravm_console") + 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, - maxmem=maxMemory(user), - maxdisk=maxDisk(user), + cant_add_vm=cantAddVm(user), + max_memory=max_memory, + max_disk=max_disk, + defaults=defaults, machines=machines, has_vnc=has_vnc, - uptimes=uptimes, + uptimes=g.uptimes, cdroms=CDROM.select()) - print Template(file='list.tmpl', searchList=[d, global_dict]) + return 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: - 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): @@ -329,34 +597,48 @@ def vnc(user, fields): 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 + -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.username - data["machine"]=machine.name - data["expires"]=time.time()+(5*60) - pickledData = cPickle.dumps(data) + 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=os.environ.get('SERVER_NAME', 'localhost'), authtoken=token) - print Template(file='vnc.tmpl', - searchList=[d, global_dict]) + return Template(file='vnc.tmpl', searchList=[d]) 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'), @@ -365,7 +647,8 @@ def getNicInfo(data_dict, machine): 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_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: @@ -373,18 +656,27 @@ def getNicInfo(data_dict, machine): 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]) + 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] + delete_disk_pairs = [(machine.name, d.guest_device_name) + for d in machine.disks] try: for nic in machine.nics: nic.machine_id = None @@ -401,78 +693,305 @@ def deleteVM(machine): remctl('web', 'lvremove', mname, dname) unregisterMachine(machine) -def command(user, fields): - print time.time()-start_time +def commandResult(user, fields): + print >> sys.stderr, time.time()-start_time machine = testMachineId(user, fields.getfirst('machine_id')) action = fields.getfirst('action') cdrom = fields.getfirst('cdrom') - print time.time()-start_time + print >> sys.stderr, 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) + 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) + out, err = remctl('control', machine.name, 'reboot', cdrom, + err=True) else: - remctl('reboot', machine.name) + 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': - remctl('destroy', machine.name) + 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': - remctl('shutdown', machine.name) + 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 time.time()-start_time + print >> sys.stderr, time.time()-start_time d = dict(user=user, command=action, machine=machine) - print Template(file="command.tmpl", searchList=[d, global_dict]) + 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): - machine = testMachineId(user, fields.getfirst('machine_id')) + """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 help(user, fields): + +def helpHandler(user, fields): + """Handler for help messages.""" simple = fields.getfirst('simple') subjects = fields.getlist('subject') - mapping = dict(paravm_console=""" + 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_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.""") + cpu_weight=""" +Don't ask us! We're as mystified as you are.""", + owner=""" +The owner field is used to determine quotas. 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 administrator.""", + 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=mapping) + mapping=help_mapping) - print Template(file="help.tmpl", searchList=[d, global_dict]) + return Template(file="help.tmpl", searchList=[d]) -def info(user, fields): - machine = testMachineId(user, fields.getfirst('machine_id')) +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)) + 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', @@ -491,42 +1010,60 @@ def info(user, fields): ] 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:] + 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:] + 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'): + if field in ('uptime', 'cputime') and locals()[field] is not None: 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])) + 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, - maxmem=maxMemory(user, machine), - maxdisk=maxDisk(user, machine), + max_mem=max_mem, + max_disk=max_disk, + owner_help=helppopup("owner"), fields = fields) - print Template(file='info.tmpl', - searchList=[d, global_dict]) + 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, @@ -534,44 +1071,74 @@ mapping = dict(list=listVms, modify=modify, info=info, create=create, - help=help) + 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 User: - username = "moo" - email = 'moo@cow.com' - 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 = 'nobody' - u.email = None - connect('postgres://sipb-xen@sipb-xen-dev/sipb_xen') + u = getUser() + g = Global(u) operation = os.environ.get('PATH_INFO', '') - #print 'Content-Type: text/plain\n' - #print operation if not operation: 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:] if not operation: operation = 'list' - - fun = mapping.get(operation, - lambda u, e: - error(operation, u, e, - "Invalid operation '%s'" % operation)) - if fun not in (help, ): - connect('postgres://sipb-xen@sipb-xen-dev/sipb_xen') + + + + fun = mapping.get(operation, badOperation) + + if fun not in (helpHandler, ): + connect('postgres://sipb-xen@sipb-xen-dev.mit.edu/sipb_xen') try: - fun(u, fields) - except MyException, err: - error(operation, u, fields, err) + 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