STDERR:
' + str(addition) + '' -Template.sipb_xen_database = sipb_xen_database +Template.database = database Template.helppopup = staticmethod(helppopup) Template.err = None @@ -105,6 +112,7 @@ class Defaults: cdrom = '' autoinstall = '' name = '' + description = '' type = 'linux-hvm' def __init__(self, max_memory=None, max_disk=None, **kws): @@ -119,15 +127,9 @@ class Defaults: DEFAULT_HEADERS = {'Content-Type': 'text/html'} -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 templates.error(searchList=[d]) - -def invalidInput(op, user, fields, err, emsg): +def invalidInput(op, username, fields, err, emsg): """Print an error page when an InvalidInput exception occurs""" - d = dict(op=op, user=user, err_field=err.err_field, + d = dict(op=op, user=username, err_field=err.err_field, err_value=str(err.err_value), stderr=emsg, errorMessage=str(err)) return templates.invalid(searchList=[d]) @@ -142,49 +144,25 @@ def hasVnc(status): return 'location' in d return False -def parseCreate(user, fields): - name = fields.getfirst('name') - if not validation.validMachineName(name): - raise InvalidInput('name', name, 'You must provide a machine name. Max 22 chars, alnum plus \'-\' and \'_\'.') - name = name.lower() - - if Machine.get_by(name=name): - raise InvalidInput('name', name, - "Name already exists.") - - owner = validation.testOwner(user, fields.getfirst('owner')) +def parseCreate(username, state, fields): + kws = dict([(kw, fields.getfirst(kw)) for kw in 'name description owner memory disksize vmtype cdrom autoinstall'.split()]) + validate = validation.Validate(username, state, strict=True, **kws) + return dict(contact=username, name=validate.name, description=validate.description, memory=validate.memory, + disksize=validate.disksize, owner=validate.owner, machine_type=validate.vmtype, + cdrom=getattr(validate, 'cdrom', None), + autoinstall=getattr(validate, 'autoinstall', None)) - memory = fields.getfirst('memory') - memory = validation.validMemory(owner, memory, on=True) - - disk_size = fields.getfirst('disk') - disk_size = validation.validDisk(owner, disk_size) - - vm_type = fields.getfirst('vmtype') - vm_type = validation.validVmType(vm_type) - - cdrom = fields.getfirst('cdrom') - if cdrom is not None and not CDROM.get(cdrom): - raise CodeError("Invalid cdrom type '%s'" % cdrom) - - clone_from = fields.getfirst('clone_from') - if clone_from and clone_from != 'ice3': - raise CodeError("Invalid clone image '%s'" % clone_from) - - return dict(contact=user, name=name, memory=memory, disk_size=disk_size, - owner=owner, machine_type=vm_type, cdrom=cdrom, clone_from=clone_from) - -def create(user, fields): +def create(username, state, path, fields): """Handler for create requests.""" try: - parsed_fields = parseCreate(user, fields) - machine = controls.createVm(**parsed_fields) + parsed_fields = parseCreate(username, state, fields) + machine = controls.createVm(username, state, **parsed_fields) except InvalidInput, err: pass else: err = None - g.clear() #Changed global state - d = getListDict(user) + state.clear() #Changed global state + d = getListDict(username, state) d['err'] = err if err: for field in fields.keys(): @@ -194,16 +172,16 @@ def create(user, fields): return templates.list(searchList=[d]) -def getListDict(user): +def getListDict(username, state): """Gets the list of local variables used by list.tmpl.""" checkpoint.checkpoint('Starting') - machines = g.machines + machines = state.machines checkpoint.checkpoint('Got my machines') on = {} has_vnc = {} - xmlist = g.xmlist + xmlist = state.xmlist checkpoint.checkpoint('Got uptimes') - can_clone = (controls.getList([Machine.get_by(name='ice3')])) == {} + can_clone = 'ice3' not in state.xmlist_raw for m in machines: if m not in xmlist: has_vnc[m] = 'Off' @@ -216,19 +194,19 @@ def getListDict(user): has_vnc[m] = "WTF?" else: has_vnc[m] = "ParaVM"+helppopup("ParaVM Console") - max_memory = validation.maxMemory(user) - max_disk = validation.maxDisk(user) + max_memory = validation.maxMemory(username, state) + max_disk = validation.maxDisk(username) checkpoint.checkpoint('Got max mem/disk') defaults = Defaults(max_memory=max_memory, max_disk=max_disk, - owner=user, + owner=username, cdrom='gutsy-i386') checkpoint.checkpoint('Got defaults') def sortkey(machine): - return (machine.owner != user, machine.owner, machine.name) + return (machine.owner != username, machine.owner, machine.name) machines = sorted(machines, key=sortkey) - d = dict(user=user, - cant_add_vm=validation.cantAddVm(user), + d = dict(user=username, + cant_add_vm=validation.cantAddVm(username, state), max_memory=max_memory, max_disk=max_disk, defaults=defaults, @@ -237,14 +215,14 @@ def getListDict(user): can_clone=can_clone) return d -def listVms(user, fields): +def listVms(username, state, path, fields): """Handler for list requests.""" checkpoint.checkpoint('Getting list dict') - d = getListDict(user) + d = getListDict(username, state) checkpoint.checkpoint('Got list dict') return templates.list(searchList=[d]) -def vnc(user, fields): +def vnc(username, state, path, fields): """VNC applet page. Note that due to same-domain restrictions, the applet connects to @@ -264,12 +242,12 @@ def vnc(user, fields): Remember to enable iptables! echo 1 > /proc/sys/net/ipv4/ip_forward """ - machine = validation.testMachineId(user, fields.getfirst('machine_id')) + machine = validation.Validate(username, state, machine_id=fields.getfirst('machine_id')).machine TOKEN_KEY = "0M6W0U1IXexThi5idy8mnkqPKEq1LtEnlK/pZSn0cDrN" data = {} - data["user"] = user + data["user"] = username data["machine"] = machine.name data["expires"] = time.time()+(5*60) pickled_data = cPickle.dumps(data) @@ -278,15 +256,21 @@ def vnc(user, fields): token = {'data': pickled_data, 'digest': m.digest()} token = cPickle.dumps(token) token = base64.urlsafe_b64encode(token) + host = controls.listHost(machine) + if host: + port = 10003 + [h.hostname for h in config.hosts].index(host) + else: + port = 5900 # dummy status = controls.statusInfo(machine) has_vnc = hasVnc(status) - d = dict(user=user, + d = dict(user=username, on=status, has_vnc=has_vnc, machine=machine, - hostname=os.environ.get('SERVER_NAME', 'localhost'), + hostname=state.environ.get('SERVER_NAME', 'localhost'), + port=port, authtoken=token) return templates.vnc(searchList=[d]) @@ -298,7 +282,7 @@ def getHostname(nic): if nic.hostname and '.' in nic.hostname: return nic.hostname elif nic.machine: - return nic.machine.name + '.xvm.mit.edu' + return nic.machine.name + '.' + config.dns.domains[0] else: return None @@ -341,36 +325,36 @@ def getDiskInfo(data_dict, machine): data_dict['%s_size' % name] = "%0.1f GiB" % (disk.size / 1024.) return disk_fields -def command(user, fields): +def command(username, state, path, fields): """Handler for running commands like boot and delete on a VM.""" back = fields.getfirst('back') try: - d = controls.commandResult(user, fields) + d = controls.commandResult(username, state, fields) if d['command'] == 'Delete VM': back = 'list' except InvalidInput, err: if not back: raise - #print >> sys.stderr, err + print >> sys.stderr, err result = err else: result = 'Success!' if not back: return templates.command(searchList=[d]) if back == 'list': - g.clear() #Changed global state - d = getListDict(user) + state.clear() #Changed global state + d = getListDict(username, state) d['result'] = result return templates.list(searchList=[d]) elif back == 'info': - machine = validation.testMachineId(user, fields.getfirst('machine_id')) - return ({'Status': '302', - 'Location': '/info?machine_id=%d' % machine.machine_id}, + machine = validation.Validate(username, state, machine_id=fields.getfirst('machine_id')).machine + return ({'Status': '303 See Other', + 'Location': 'info?machine_id=%d' % machine.machine_id}, "You shouldn't see this message.") else: raise InvalidInput('back', back, 'Not a known back page.') -def modifyDict(user, fields): +def modifyDict(username, state, fields): """Modify a machine as specified by CGI arguments. Return a list of local variables for modify.tmpl. @@ -378,28 +362,19 @@ def modifyDict(user, fields): olddisk = {} transaction = ctx.current.create_transaction() try: - machine = validation.testMachineId(user, fields.getfirst('machine_id')) - owner = validation.testOwner(user, fields.getfirst('owner'), machine) - admin = validation.testAdmin(user, fields.getfirst('administrator'), - machine) - contact = validation.testContact(user, fields.getfirst('contact'), - machine) - name = validation.testName(user, fields.getfirst('name'), machine) + kws = dict([(kw, fields.getfirst(kw)) for kw in 'machine_id owner admin contact name description memory vmtype disksize'.split()]) + validate = validation.Validate(username, state, **kws) + machine = validate.machine oldname = machine.name - command = "modify" - memory = fields.getfirst('memory') - if memory is not None: - memory = validation.validMemory(user, memory, machine, on=False) - machine.memory = memory + if hasattr(validate, 'memory'): + machine.memory = validate.memory - vm_type = validation.validVmType(fields.getfirst('vmtype')) - if vm_type is not None: - machine.type = vm_type + if hasattr(validate, 'vmtype'): + machine.type = validate.vmtype - disksize = validation.testDisk(user, fields.getfirst('disk')) - if disksize is not None: - disksize = validation.validDisk(user, disksize, machine) + if hasattr(validate, 'disksize'): + disksize = validate.disksize disk = machine.disks[0] if disk.size != disksize: olddisk[disk.guest_device_name] = disksize @@ -407,19 +382,22 @@ def modifyDict(user, fields): ctx.current.save(disk) update_acl = False - if owner is not None and owner != machine.owner: - machine.owner = owner + if hasattr(validate, 'owner') and validate.owner != machine.owner: + machine.owner = validate.owner update_acl = True - if name is not None: - machine.name = name - if admin is not None and admin != machine.administrator: - machine.administrator = admin + if hasattr(validate, 'name'): + machine.name = validate.name + if hasattr(validate, 'description'): + machine.description = validate.description + if hasattr(validate, 'admin') and validate.admin != machine.administrator: + machine.administrator = validate.admin update_acl = True - if contact is not None: - machine.contact = contact + if hasattr(validate, 'contact'): + machine.contact = validate.contact ctx.current.save(machine) if update_acl: + print >> sys.stderr, machine, machine.administrator cache_acls.refreshMachine(machine) transaction.commit() except: @@ -427,24 +405,24 @@ def modifyDict(user, fields): raise for diskname in olddisk: controls.resizeDisk(oldname, diskname, str(olddisk[diskname])) - if name is not None: - controls.renameMachine(machine, oldname, name) - return dict(user=user, - command=command, + if hasattr(validate, 'name'): + controls.renameMachine(machine, oldname, validate.name) + return dict(user=username, + command="modify", machine=machine) -def modify(user, fields): +def modify(username, state, path, fields): """Handler for modifying attributes of a machine.""" try: - modify_dict = modifyDict(user, fields) + modify_dict = modifyDict(username, state, fields) except InvalidInput, err: result = None - machine = validation.testMachineId(user, fields.getfirst('machine_id')) + machine = validation.Validate(username, state, machine_id=fields.getfirst('machine_id')).machine else: machine = modify_dict['machine'] result = 'Success!' err = None - info_dict = infoDict(user, machine) + info_dict = infoDict(username, state, machine) info_dict['err'] = err if err: for field in fields.keys(): @@ -453,7 +431,7 @@ def modify(user, fields): return templates.info(searchList=[info_dict]) -def helpHandler(user, fields): +def helpHandler(username, state, path, fields): """Handler for help messages.""" simple = fields.getfirst('simple') subjects = fields.getlist('subject') @@ -461,8 +439,8 @@ def helpHandler(user, fields): help_mapping = {'ParaVM Console': """ ParaVM machines do not support local console access over VNC. To access the serial console of these machines, you can SSH with Kerberos -to console.xvm.mit.edu, using the name of the machine as your -username.""", +to console.%s, using the name of the machine as your +username.""" % config.dns.domains[0], 'HVM/ParaVM': """ HVM machines use the virtualization features of the processor, while ParaVM machines use Xen's emulation of virtualization features. You @@ -496,7 +474,7 @@ console will suffer artifacts. if not subjects: subjects = sorted(help_mapping.keys()) - d = dict(user=user, + d = dict(user=username, simple=simple, subjects=subjects, mapping=help_mapping) @@ -504,11 +482,11 @@ console will suffer artifacts. return templates.help(searchList=[d]) -def badOperation(u, e): +def badOperation(u, s, p, e): """Function called when accessing an unknown URI.""" - raise CodeError("Unknown operation") + return ({'Status': '404 Not Found'}, 'Invalid operation.') -def infoDict(user, machine): +def infoDict(username, state, machine): """Get the variables used by info.tmpl.""" status = controls.statusInfo(machine) checkpoint.checkpoint('Getting status info') @@ -520,6 +498,7 @@ def infoDict(user, machine): cputime = None else: main_status = dict(status[1:]) + main_status['host'] = controls.listHost(machine) 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)) @@ -528,6 +507,7 @@ def infoDict(user, machine): 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'), + ('description', 'Description'), ('owner', 'Owner'), ('administrator', 'Administrator'), ('contact', 'Contact'), @@ -535,6 +515,7 @@ def infoDict(user, machine): 'NIC_INFO', ('uptime', 'uptime'), ('cputime', 'CPU usage'), + ('host', 'Hosted on'), ('memory', 'RAM'), 'DISK_INFO', ('state', 'state (xen format)'), @@ -549,6 +530,7 @@ def infoDict(user, machine): fields = [] machine_info = {} machine_info['name'] = machine.name + machine_info['description'] = machine.description machine_info['type'] = machine.type.hvm and 'HVM' or 'ParaVM' machine_info['owner'] = machine.owner machine_info['administrator'] = machine.administrator @@ -579,16 +561,16 @@ def infoDict(user, machine): checkpoint.checkpoint('Got fields') - max_mem = validation.maxMemory(user, machine, False) + max_mem = validation.maxMemory(machine.owner, state, machine, False) checkpoint.checkpoint('Got mem') - max_disk = validation.maxDisk(user, machine) + max_disk = validation.maxDisk(machine.owner, machine) defaults = Defaults() - for name in 'machine_id name administrator owner memory contact'.split(): + for name in 'machine_id name description administrator owner memory contact'.split(): setattr(defaults, name, getattr(machine, name)) defaults.type = machine.type.type_id defaults.disk = "%0.2f" % (machine.disks[0].size/1024.) checkpoint.checkpoint('Got defaults') - d = dict(user=user, + d = dict(user=username, on=status is not None, machine=machine, defaults=defaults, @@ -601,17 +583,32 @@ def infoDict(user, machine): fields = fields) return d -def info(user, fields): +def info(username, state, path, fields): """Handler for info on a single VM.""" - machine = validation.testMachineId(user, fields.getfirst('machine_id')) - d = infoDict(user, machine) + machine = validation.Validate(username, state, machine_id=fields.getfirst('machine_id')).machine + d = infoDict(username, state, machine) checkpoint.checkpoint('Got infodict') return templates.info(searchList=[d]) -def unauthFront(_, fields): +def unauthFront(_, _2, _3, fields): """Information for unauth'd users.""" return templates.unauth(searchList=[{'simple' : True}]) +def overlord(username, state, path, fields): + if path == '': + return ({'Status': '303 See Other', + 'Location': 'overlord/'}, + "You shouldn't see this message.") + if not username in getAfsGroupMembers('system:xvm', 'athena.mit.edu'): + raise InvalidInput('username', username, 'Not an overlord.') + newstate = State(username, overlord=True) + newstate.environ = state.environ + return handler(username, newstate, path, fields) + +def throwError(_, __, ___, ____): + """Throw an error, to test the error-tracing mechanisms.""" + raise RuntimeError("test of the emergency broadcast system") + mapping = dict(list=listVms, vnc=vnc, command=command, @@ -619,7 +616,9 @@ mapping = dict(list=listVms, info=info, create=create, help=helpHandler, - unauth=unauthFront) + unauth=unauthFront, + overlord=overlord, + errortest=throwError) def printHeaders(headers): """Print a dictionary as HTTP headers.""" @@ -627,86 +626,116 @@ def printHeaders(headers): print '%s: %s' % (key, value) print +def send_error_mail(subject, body): + import subprocess + + to = config.web.errormail + mail = """To: %s +From: root@%s +Subject: %s + +%s +""" % (to, config.web.hostname, subject, body) + p = subprocess.Popen(['/usr/sbin/sendmail', to], stdin=subprocess.PIPE) + p.stdin.write(mail) + p.stdin.close() + p.wait() + +def show_error(op, username, fields, err, emsg, traceback): + """Print an error page when an exception occurs""" + d = dict(op=op, user=username, fields=fields, + errorMessage=str(err), stderr=emsg, traceback=traceback) + details = templates.error_raw(searchList=[d]) + if username not in ('price', 'ecprice', 'andersk'): #add yourself at will + send_error_mail('xvm error on %s for %s: %s' % (op, username, err), + details) + d['details'] = details + return templates.error(searchList=[d]) -def getUser(): +def getUser(environ): """Return the current user based on the SSL environment variables""" - email = os.environ.get('SSL_CLIENT_S_DN_Email', None) - if email is None: - return None - return email.split("@")[0] + return environ.get('REMOTE_USER', None) -def main(operation, user, fields): - start_time = time.time() +def handler(username, state, path, fields): + operation, path = pathSplit(path) + if not operation: + operation = 'list' + print 'Starting', operation fun = mapping.get(operation, badOperation) - - if fun not in (helpHandler, ): - connect('postgres://sipb-xen@sipb-xen-dev.mit.edu/sipb_xen') - try: - checkpoint.checkpoint('Before') - output = fun(u, fields) - checkpoint.checkpoint('After') - - 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) - output_string = str(output) - checkpoint.checkpoint('output as a string') - print output_string + return fun(username, state, path, fields) + +class App: + def __init__(self, environ, start_response): + self.environ = environ + self.start = start_response + + self.username = getUser(environ) + self.state = State(self.username) + self.state.environ = environ + + random.seed() #sigh + + def __iter__(self): + start_time = time.time() + database.clear_cache() + sys.stderr = StringIO() + fields = cgi.FieldStorage(fp=self.environ['wsgi.input'], environ=self.environ) + operation = self.environ.get('PATH_INFO', '') + if not operation: + self.start("301 Moved Permanently", [('Location', './')]) + return + if self.username is None: + operation = 'unauth' + + try: + checkpoint.checkpoint('Before') + output = handler(self.username, self.state, operation, fields) + checkpoint.checkpoint('After') + + headers = dict(DEFAULT_HEADERS) + if isinstance(output, tuple): + new_headers, output = output + headers.update(new_headers) + e = revertStandardError() + if e: + if hasattr(output, 'addError'): + output.addError(e) + else: + # This only happens on redirects, so it'd be a pain to get + # the message to the user. Maybe in the response is useful. + output = output + '\n\nstderr:\n' + e + output_string = str(output) + checkpoint.checkpoint('output as a string') + except Exception, err: + if not fields.has_key('js'): + if isinstance(err, InvalidInput): + self.start('200 OK', [('Content-Type', 'text/html')]) + e = revertStandardError() + yield str(invalidInput(operation, self.username, fields, + err, e)) + return + import traceback + self.start('500 Internal Server Error', + [('Content-Type', 'text/html')]) + e = revertStandardError() + s = show_error(operation, self.username, fields, + err, e, traceback.format_exc()) + yield str(s) + return + status = headers.setdefault('Status', '200 OK') + del headers['Status'] + self.start(status, headers.items()) + yield output_string if fields.has_key('timedebug'): - print '
%s' % checkpoint - 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 xvm-dev@mit.edu with the contents of this page.' - print '----' - e = revertStandardError() - print e - print '----' - raise + yield '
%s' % cgi.escape(str(checkpoint)) -if __name__ == '__main__': - fields = cgi.FieldStorage() +def constructor(): + connect() + return App - if fields.has_key('sqldebug'): - import logging - logging.basicConfig() - logging.getLogger('sqlalchemy.engine').setLevel(logging.INFO) - logging.getLogger('sqlalchemy.orm.unitofwork').setLevel(logging.INFO) +def main(): + from flup.server.fcgi_fork import WSGIServer + WSGIServer(constructor()).run() - u = getUser() - g.user = 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 u is None: - operation = 'unauth' - - if operation.startswith('/'): - operation = operation[1:] - if not operation: - operation = 'list' - - if os.getenv("SIPB_XEN_PROFILE"): - import profile - profile.run('main(operation, u, fields)', 'log-'+operation) - else: - main(operation, u, fields) +if __name__ == '__main__': + main()