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): @@ -119,12 +127,6 @@ class Defaults: DEFAULT_HEADERS = {'Content-Type': 'text/html'} -def error(op, username, fields, err, emsg): - """Print an error page when a CodeError occurs""" - d = dict(op=op, user=username, errorMessage=str(err), - stderr=emsg) - return templates.error(searchList=[d]) - def invalidInput(op, username, fields, err, emsg): """Print an error page when an InvalidInput exception occurs""" d = dict(op=op, user=username, err_field=err.err_field, @@ -143,24 +145,24 @@ def hasVnc(status): return False def parseCreate(username, state, fields): - kws = dict([(kw, fields.getfirst(kw)) for kw in 'name owner memory disksize vmtype cdrom clone_from'.split()]) - validate = validation.Validate(username, state, **kws) - return dict(contact=username, name=validate.name, memory=validate.memory, + 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), - clone_from=getattr(validate, 'clone_from', None)) + autoinstall=getattr(validate, 'autoinstall', None)) -def create(username, state, fields): +def create(username, state, path, fields): """Handler for create requests.""" try: parsed_fields = parseCreate(username, state, fields) - machine = controls.createVm(username, **parsed_fields) + machine = controls.createVm(username, state, **parsed_fields) except InvalidInput, err: pass else: err = None state.clear() #Changed global state - d = getListDict(username) + d = getListDict(username, state) d['err'] = err if err: for field in fields.keys(): @@ -213,14 +215,14 @@ def getListDict(username, state): can_clone=can_clone) return d -def listVms(username, state, fields): +def listVms(username, state, path, fields): """Handler for list requests.""" checkpoint.checkpoint('Getting list dict') d = getListDict(username, state) checkpoint.checkpoint('Got list dict') return templates.list(searchList=[d]) -def vnc(username, state, fields): +def vnc(username, state, path, fields): """VNC applet page. Note that due to same-domain restrictions, the applet connects to @@ -254,6 +256,11 @@ def vnc(username, state, 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) @@ -262,7 +269,8 @@ def vnc(username, state, fields): 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]) @@ -274,7 +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 @@ -317,7 +325,7 @@ def getDiskInfo(data_dict, machine): data_dict['%s_size' % name] = "%0.1f GiB" % (disk.size / 1024.) return disk_fields -def command(username, state, fields): +def command(username, state, path, fields): """Handler for running commands like boot and delete on a VM.""" back = fields.getfirst('back') try: @@ -335,13 +343,13 @@ def command(username, state, fields): return templates.command(searchList=[d]) if back == 'list': state.clear() #Changed global state - d = getListDict(username) + d = getListDict(username, state) d['result'] = result return templates.list(searchList=[d]) elif back == 'info': machine = validation.Validate(username, state, machine_id=fields.getfirst('machine_id')).machine - return ({'Status': '302', - 'Location': '/info?machine_id=%d' % machine.machine_id}, + 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.') @@ -354,10 +362,9 @@ def modifyDict(username, state, fields): olddisk = {} transaction = ctx.current.create_transaction() try: - kws = dict([(kw, fields.getfirst(kw)) for kw in 'machine_id owner admin contact name memory vmtype disksize'.split()]) + 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 - print >> sys.stderr, machine, machine.administrator, kws['admin'] oldname = machine.name if hasattr(validate, 'memory'): @@ -379,7 +386,9 @@ def modifyDict(username, state, fields): machine.owner = validate.owner update_acl = True if hasattr(validate, 'name'): - machine.name = 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 @@ -402,7 +411,7 @@ def modifyDict(username, state, fields): command="modify", machine=machine) -def modify(username, state, fields): +def modify(username, state, path, fields): """Handler for modifying attributes of a machine.""" try: modify_dict = modifyDict(username, state, fields) @@ -413,7 +422,7 @@ def modify(username, state, fields): machine = modify_dict['machine'] result = 'Success!' err = None - info_dict = infoDict(username, machine) + info_dict = infoDict(username, state, machine) info_dict['err'] = err if err: for field in fields.keys(): @@ -422,7 +431,7 @@ def modify(username, state, fields): return templates.info(searchList=[info_dict]) -def helpHandler(username, state, fields): +def helpHandler(username, state, path, fields): """Handler for help messages.""" simple = fields.getfirst('simple') subjects = fields.getlist('subject') @@ -430,8 +439,8 @@ def helpHandler(username, state, 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 @@ -473,11 +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(username, machine): +def infoDict(username, state, machine): """Get the variables used by info.tmpl.""" status = controls.statusInfo(machine) checkpoint.checkpoint('Getting status info') @@ -489,6 +498,7 @@ def infoDict(username, 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)) @@ -497,6 +507,7 @@ def infoDict(username, 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'), @@ -504,6 +515,7 @@ def infoDict(username, machine): 'NIC_INFO', ('uptime', 'uptime'), ('cputime', 'CPU usage'), + ('host', 'Hosted on'), ('memory', 'RAM'), 'DISK_INFO', ('state', 'state (xen format)'), @@ -518,6 +530,7 @@ def infoDict(username, 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 @@ -552,7 +565,7 @@ def infoDict(username, machine): checkpoint.checkpoint('Got mem') 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.) @@ -570,17 +583,32 @@ def infoDict(username, machine): fields = fields) return d -def info(username, state, fields): +def info(username, state, path, fields): """Handler for info on a single VM.""" machine = validation.Validate(username, state, machine_id=fields.getfirst('machine_id')).machine - d = infoDict(username, machine) + d = infoDict(username, state, machine) checkpoint.checkpoint('Got infodict') return templates.info(searchList=[d]) -def unauthFront(_, _2, 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, @@ -588,7 +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.""" @@ -596,93 +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(environ): """Return the current user based on the SSL environment variables""" - email = environ.get('SSL_CLIENT_S_DN_Email', None) - if email is None: - return None - if not email.endswith('@MIT.EDU'): - return None - return email[:-8] + return environ.get('REMOTE_USER', None) -def main(operation, username, state, 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(username, state, 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 isinstance(output, basestring): - sys.stderr = StringIO() - x = str(output) - print >> sys.stderr, x - print >> sys.stderr, 'XXX' - print >> sys.stderr, e - raise Exception() - 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' % cgi.escape(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, state.username, fields, err, e) - sys.exit(1) - if isinstance(err, InvalidInput): - print 'Content-Type: text/html\n' - e = revertStandardError() - print invalidInput(operation, state.username, 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() - username = getUser(os.environ) - state.username = username - 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 username 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, username, state, fields)', 'log-'+operation) - else: - main(operation, username, state, fields) +if __name__ == '__main__': + main()