X-Git-Url: http://xvm.mit.edu/gitweb/invirt/packages/invirt-web.git/blobdiff_plain/cf20ad6221157bd0053bb10fad3d5d33483ed38a..bc2c23e470e232b2a87cad3c826fcf4c07dc9d62:/templates/main.py diff --git a/templates/main.py b/templates/main.py index a8e59b8..984f3b8 100755 --- a/templates/main.py +++ b/templates/main.py @@ -11,8 +11,8 @@ import cPickle 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') @@ -21,8 +21,33 @@ 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). + """ + 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 '(?)' + + +global_dict = {} +global_dict['helppopup'] = helppopup + + # ... and stolen from xend/uuid.py def randomUUID(): """Generate a random UUID.""" @@ -30,21 +55,64 @@ 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): - 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""" @@ -53,15 +121,19 @@ def validMachineName(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.""" @@ -80,10 +152,11 @@ def remctl(*args, **kws): 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(): @@ -106,6 +179,10 @@ 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. @@ -120,6 +197,8 @@ def parseStatus(s): if v == '(': stack.append([]) elif v == ')': + if len(stack[-1]) == 1: + stack[-1].append('') stack[-2].append(stack[-1]) stack.pop() else: @@ -128,18 +207,38 @@ def parseStatus(s): 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: @@ -149,9 +248,16 @@ def hasVnc(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() @@ -169,7 +275,7 @@ def createVm(user, name, memory, disk, is_hvm, cdrom): '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 @@ -179,88 +285,119 @@ def createVm(user, name, memory, disk, is_hvm, cdrom): 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): @@ -276,14 +413,16 @@ 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) @@ -298,31 +437,231 @@ def vnc(user, fields): 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:] @@ -332,8 +671,12 @@ if __name__ == '__main__': 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)