X-Git-Url: http://xvm.mit.edu/gitweb/invirt/packages/invirt-web.git/blobdiff_plain/dbbf69f4561c352fe825f6c7b0a81912aab987c9..4663602deda7a8c90d59c8d3a57cd5a3945d73ca:/templates/controls.py diff --git a/templates/controls.py b/templates/controls.py deleted file mode 100644 index 3671f21..0000000 --- a/templates/controls.py +++ /dev/null @@ -1,284 +0,0 @@ -""" -Functions to perform remctls. -""" - -from sipb_xen_database import Machine, Disk, Type, NIC, CDROM, ctx, meta -import validation -from webcommon import CodeError, InvalidInput -import random -import subprocess -import sys -import time -import re - -# ... and stolen from xend/uuid.py -def randomUUID(): - """Generate a random UUID.""" - - 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) -# end stolen code - -def kinit(username = 'daemon/sipb-xen.mit.edu', keytab = '/etc/sipb-xen.keytab'): - """Kinit with a given username and keytab""" - - p = subprocess.Popen(['kinit', "-k", "-t", keytab, username], - stderr=subprocess.PIPE) - e = p.wait() - if e: - raise CodeError("Error %s in kinit: %s" % (e, p.stderr.read())) - -def checkKinit(): - """If we lack tickets, kinit.""" - p = subprocess.Popen(['klist', '-s']) - if p.wait(): - kinit() - -def remctl(*args, **kws): - """Perform a remctl and return the output. - - kinits if necessary, and outputs errors to stderr. - """ - checkKinit() - p = subprocess.Popen(['remctl', 'black-mesa.mit.edu'] - + list(args), - stdout=subprocess.PIPE, - stderr=subprocess.PIPE) - v = p.wait() - if kws.get('err'): - return p.stdout.read(), p.stderr.read() - 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 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. - - If cdtype is None, give no boot cd. Otherwise, it is the string - id of the CD (e.g. 'gutsy_i386') - """ - if cdtype is not None: - remctl('control', machine.name, 'create', - cdtype) - else: - remctl('control', machine.name, 'create') - -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 createVm(owner, contact, 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: - validation.validMemory(owner, memory) - validation.validDisk(owner, disk * 1. / 1024) - validation.validAddVm(owner) - 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 = owner - machine.administrator = owner - machine.contact = contact - machine.uuid = uuidToString(randomUUID()) - machine.boot_off_cd = True - machine_type = Type.get_by(hvm=is_hvm) - machine.type_id = machine_type.type_id - ctx.current.save(machine) - disk = Disk(machine.machine_id, - 'hda', disk) - 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) - ctx.current.save(disk) - transaction.commit() - except: - transaction.rollback() - raise - registerMachine(machine) - makeDisks(machine) - # tell it to boot with cdrom - bootMachine(machine, cdrom) - return machine - -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: - 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 parseStatus(s): - """Parse a status string into nested tuples of strings. - - s = output of xm list --long - """ - values = re.split('([()])', s) - stack = [[]] - for v in values[2:-2]: #remove initial and final '()' - if not v: - continue - v = v.strip() - if v == '(': - stack.append([]) - elif v == ')': - if len(stack[-1]) == 1: - stack[-1].append('') - stack[-2].append(stack[-1]) - stack.pop() - else: - if not v: - continue - stack[-1].extend(v.split()) - return stack[-1] - -def statusInfo(machine): - """Return the status list for a given machine. - - Gets and parses xm list --long - """ - value_string, err_string = remctl('control', machine.name, 'list-long', - err=True) - if 'Unknown command' in err_string: - 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 CodeError("ERROR in remctl list-long %s: %s" % - (machine.name, err_string)) - status = parseStatus(value_string) - return status - -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] - 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 commandResult(user, fields): - start_time = 0 - print >> sys.stderr, time.time()-start_time - machine = validation.testMachineId(user, fields.getfirst('machine_id')) - action = fields.getfirst('action') - cdrom = fields.getfirst('cdrom') - print >> sys.stderr, 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: - out, err = remctl('control', machine.name, 'reboot', cdrom, - err=True) - else: - 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 validation.maxMemory(user, machine) < 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': - 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': - 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 >> sys.stderr, time.time()-start_time - - d = dict(user=user, - command=action, - machine=machine) - return d - -def resizeDisk(machine_name, disk_name, new_size): - remctl("web", "lvresize", machine_name, disk_name, new_size) - -def renameMachine(machine, old_name, new_name): - for disk in machine.disks: - remctl("web", "lvrename", old_name, - disk.guest_device_name, new_name) - remctl("web", "moveregister", old_name, new_name) -