2 from invirt.common import CodeError, InvalidInput
10 from invirt.config import structs as config
11 from invirt.database import Machine, Disk, Type, NIC, CDROM, session, meta
12 from invirt.remctl import remctl as gen_remctl
14 # ... and stolen from xend/uuid.py
16 """Generate a random UUID."""
18 return [ random.randint(0, 255) for _ in range(0, 16) ]
21 """Turn a numeric UUID to a hyphen-seperated one."""
22 return "-".join(["%02x" * 4, "%02x" * 2, "%02x" * 2, "%02x" * 2,
23 "%02x" * 6]) % tuple(u)
26 def remctl(*args, **kwargs):
27 return gen_remctl(config.remote.hostname, *args,
28 principal='daemon/'+config.web.hostname,
31 def lvcreate(machine, disk):
32 """Create a single disk for a machine"""
33 remctl('web', 'lvcreate', machine.name,
34 disk.guest_device_name, str(disk.size))
36 def makeDisks(machine):
37 """Update the lvm partitions to add a disk."""
38 for disk in machine.disks:
39 lvcreate(machine, disk)
41 def getswap(disksize, memsize):
42 """Returns the recommended swap partition size."""
43 return int(min(disksize / 4, memsize * 1.5))
45 def lvinstall(machine, autoinstall):
46 disksize = machine.disks[0].size
47 memsize = machine.memory
48 swapsize = getswap(disksize, memsize)
49 imagesize = disksize - swapsize
50 ip = machine.nics[0].ip
51 remctl('control', machine.name, 'install',
52 'dist=%s' % autoinstall.distribution,
53 'mirror=%s' % autoinstall.mirror,
54 'imagesize=%s' % imagesize)
56 def lvcopy(machine_orig_name, machine, rootpw):
57 """Copy a golden image onto a machine's disk"""
58 remctl('web', 'lvcopy', machine_orig_name, machine.name, rootpw)
60 def bootMachine(machine, cdtype):
61 """Boot a machine with a given boot CD.
63 If cdtype is None, give no boot cd. Otherwise, it is the string
64 id of the CD (e.g. 'gutsy_i386')
66 if cdtype is not None:
67 out, err = remctl('control', machine.name, 'create',
70 out, err = remctl('control', machine.name, 'create',
72 if 'already running' in err:
73 raise InvalidInput('action', 'create',
74 'VM %s is already on' % machine.name)
76 raise CodeError('"%s" on "control %s create %s'
77 % (err, machine.name, cdtype))
79 def createVm(username, state, owner, contact, name, description, memory, disksize, machine_type, cdrom, autoinstall):
80 """Create a VM and put it in the database"""
81 # put stuff in the table
84 validation.Validate(username, state, name=name, description=description, owner=owner, memory=memory, disksize=disksize/1024.)
87 machine.description = description
88 machine.memory = memory
90 machine.administrator = owner
91 machine.contact = contact
92 machine.uuid = uuidToString(randomUUID())
93 machine.boot_off_cd = True
94 machine.type = machine_type
95 session.save_or_update(machine)
96 disk = Disk(machine=machine,
97 guest_device_name='hda', size=disksize)
98 nic = NIC.query().filter_by(machine_id=None).first()
99 if not nic: #No IPs left!
100 raise CodeError("No IP addresses left! "
101 "Contact %s." % config.web.errormail)
102 nic.machine = machine
104 session.save_or_update(nic)
105 session.save_or_update(disk)
106 cache_acls.refreshMachine(machine)
113 lvinstall(machine, autoinstall)
115 # tell it to boot with cdrom
116 bootMachine(machine, cdrom)
120 """Return a dictionary mapping machine names to dicts."""
121 value_string = remctl('web', 'listvms')
122 value_dict = yaml.load(value_string, yaml.CSafeLoader)
126 """Parse a status string into nested tuples of strings.
128 s = output of xm list --long <machine_name>
130 values = re.split('([()])', s)
132 for v in values[2:-2]: #remove initial and final '()'
139 if len(stack[-1]) == 1:
141 stack[-2].append(stack[-1])
146 stack[-1].extend(v.split())
149 def statusInfo(machine):
150 """Return the status list for a given machine.
152 Gets and parses xm list --long
154 value_string, err_string = remctl('control', machine.name, 'list-long',
156 if 'Unknown command' in err_string:
157 raise CodeError("ERROR in remctl list-long %s is not registered" %
159 elif 'is not on' in err_string:
162 raise CodeError("ERROR in remctl list-long %s: %s" %
163 (machine.name, err_string))
164 status = parseStatus(value_string)
167 def listHost(machine):
168 """Return the host a machine is running on"""
169 out, err = remctl('control', machine.name, 'listhost', err=True)
174 def deleteVM(machine):
176 remctl('control', machine.name, 'destroy', err=True)
178 delete_disk_pairs = [(machine.name, d.guest_device_name)
179 for d in machine.disks]
181 for mname, dname in delete_disk_pairs:
182 remctl('web', 'lvremove', mname, dname)
183 for nic in machine.nics:
184 nic.machine_id = None
186 session.save_or_update(nic)
187 for disk in machine.disks:
189 session.delete(machine)
195 def commandResult(username, state, fields):
197 machine = validation.Validate(username, state, machine_id=fields.getfirst('machine_id')).machine
198 action = fields.getfirst('action')
199 cdrom = fields.getfirst('cdrom')
200 if cdrom is not None and not CDROM.query().filter_by(cdrom_id=cdrom).one():
201 raise CodeError("Invalid cdrom type '%s'" % cdrom)
202 if action not in ('Reboot', 'Power on', 'Power off', 'Shutdown',
204 raise CodeError("Invalid action '%s'" % action)
205 if action == 'Reboot':
206 if cdrom is not None:
207 out, err = remctl('control', machine.name, 'reboot', cdrom,
210 out, err = remctl('control', machine.name, 'reboot',
213 if re.match("machine '.*' is not on", err):
214 raise InvalidInput("action", "reboot",
217 print >> sys.stderr, 'Error on reboot:'
218 print >> sys.stderr, err
219 raise CodeError('ERROR on remctl')
221 elif action == 'Power on':
222 if validation.maxMemory(username, state, machine) < machine.memory:
223 raise InvalidInput('action', 'Power on',
224 "You don't have enough free RAM quota "
225 "to turn on this machine.")
226 bootMachine(machine, cdrom)
227 elif action == 'Power off':
228 out, err = remctl('control', machine.name, 'destroy', err=True)
230 if re.match("machine '.*' is not on", err):
231 raise InvalidInput("action", "Power off",
232 "Machine is not on.")
234 print >> sys.stderr, 'Error on power off:'
235 print >> sys.stderr, err
236 raise CodeError('ERROR on remctl')
237 elif action == 'Shutdown':
238 out, err = remctl('control', machine.name, 'shutdown', err=True)
240 if re.match("machine '.*' is not on", err):
241 raise InvalidInput("action", "Shutdown",
242 "Machine is not on.")
244 print >> sys.stderr, 'Error on Shutdown:'
245 print >> sys.stderr, err
246 raise CodeError('ERROR on remctl')
247 elif action == 'Delete VM':
250 d = dict(user=username,
255 def resizeDisk(machine_name, disk_name, new_size):
256 remctl("web", "lvresize", machine_name, disk_name, new_size)
258 def renameMachine(machine, old_name, new_name):
259 for disk in machine.disks:
260 remctl("web", "lvrename", old_name,
261 disk.guest_device_name, new_name)