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def helpplugin(self, query, plugin, method):
""" Get help about a plugin installed on the matching host.
"""
objects = self.client.list(query, show=('r', ), method='plugin')
errs = Reporter()
for obj in objects:
if obj['r'] not in ('host', 'hw'):
errs.error(obj['id'], 'not a host')
else:
try:
node = self.server.get_client(obj['id'])
except KeyError:
errs.error(obj['id'], 'node not connected')
continue
try:
help = node.plugin_help(plugin, method)
except RpcError as err:
errs.error(obj['id'], '%s (exc: %s)' % (err.message,
err.exception))
else:
errs.success(obj['id'], 'ok.', output=help)
return errs.get_dict()
@listed
def runplugin(self, query, plugin, method, batch=None, **kwargs):
""" Execute a plugin method on matching nodes.
"""
# Load the plugin:
sha1_hash, _ = self.server.plugins.load(plugin)
objects = self.client.list(query, show=('r', ), method='plugin')
errs = Reporter()
for obj in objects:
if obj['r'] not in ('host', 'hv'):
errs.error(obj['id'], 'not a host')
else:
try:
node = self.server.get_client(obj['id'])
except KeyError:
errs.error(obj['id'], 'node not connected')
continue
try:
job_id = node.plugin_run(plugin, method, self.client.login,
batch=batch, **kwargs)
except RpcError as err:
errs.error(obj['id'], '%s (exc: %s)' % (err.message,
err.exception))
else:
job_id = '.'.join((obj['id'], job_id))
errs.success(obj['id'], 'ok.', jobs=job_id)
return errs.get_dict()
# Election / Migration / Cloning / Allocation
@listed
def electiontypes(self):
return Elector.ALGO_BY_TYPES
@listed
def election(self, query_vm, query_dest, mtype='cold', algo='fair', **kwargs):
""" Consult the server for the migration of specified vm on
an hypervisor pool.
:param query_vm: the tql query to select VMs to migrate
:param query_dest: the tql query to select destination hypervisors
candidates
:param mtype: type of migration
:param algo: algo used for distribution
"""
elector = Elector(self.server, query_vm, query_dest, self.client)
return elector.election(mtype, algo, **kwargs)
@listed
def migrate(self, migration_plan):
""" Launch the provided migration plan.
:param migration_plan: the plan of the migration.
:return: a standard error report
"""
errs = Reporter()
for migration in migration_plan:
# Check if the migration type is know:
if migration['type'] in MIGRATION_TYPES:
mtype = MIGRATION_TYPES[migration['type']]
else:
errmsg = '%r unknown migration type' % migration['type']
errs.error(migration['sid'], errmsg)
continue
vm = self.server.db.get_by_id(migration['sid'], ('h', 'hv', 'p'))
# Construct the migration properties:
migration_properties = {
'client': self.client,
'vm_name': vm['h'],
'hv_source': vm['p'],
'hv_dest': migration['did']
}
# Create the job:
job = self.client.spawn_job(mtype, settings=migration_properties)
errs.success(migration['sid'], 'migration launched, id:%s' % job.id)
return errs.get_dict()
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@listed
def migrate2(self, tql_vm, tql_target, batch=None, live=False, flags=None):
""" Launch a migration.
"""
self.client.check('migrate')
vms = self.client.list(tql_vm, show=('r', ), method='migrate')
errs = Reporter()
for vm in vms:
if vm['r'] != 'vm':
errs.error(vm['id'], 'not a vm')
else:
settings = {'server': self.server,
'client': self.client,
'vm_id': vm['id'],
'tql_target': tql_target,
'live': live,
'flags': flags}
job = self.client.spawn_job(MigrationJob, batch=batch, settings=settings)
errs.success(vm['id'], 'migration launched, id:%s' % job.id)
return errs.get_dict()
@listed
def clone(self, tql_vm, tql_dest, name):
""" Create and launch a clone job.
:param tql_vm: a tql matching one vm object (the cloned vm)
:param tql_dest: a tql matching one hypervisor object (the destination
hypervisor)
:param name: the new name of the VM
"""
vm = self.client.list(tql_vm, show=('r', 'h', 'p'), method='clone')
if len(vm) != 1:
raise CloneError('VM Tql must select ONE vm')
elif vm[0]['r'] != 'vm':
raise CloneError('Destination Tql must select a vm')
else:
vm = vm[0]
dest = self.client.list(tql_dest, show=('r',), method='clone')
if len(dest) != 1:
raise CloneError('Destination Tql must select ONE hypervisor')
elif dest[0]['r'] != 'hv':
raise CloneError('Destination Tql must select an hypervisor')
else:
dest = dest[0]
job = self.client.spawn_job(CloneJob, settings={'server': self.server,
'client': self.client,
'vm_name': vm['h'],
'new_vm_name': name,
'hv_source': vm['p'],
'hv_dest': dest['id']})
return job.id
@listed
def allocate(self, vmspec, tql_target):
""" Allocate new VMs.
:param vmspec: a vmspec structure
:param tql_target: a TQL used as target restriction
"""
self.client.check('allocate')
# Check and expand vmspec input:
expanded_vmspec = expand_vmspec(vmspec)
job = self.client.spawn_job(AllocationJob, settings={'server': self.server,
'client': self.client,
'expanded_vmspec': expanded_vmspec,
'tql_target': tql_target})
return job.id
#
# Remote console:
#
@listed
def console(self, tql):
""" Start a remote console on object matching the provided tql.
:param tql: tql matching only one object on which start the console
:return: the label of the created tunnel
"""
objects = self.client.list(tql, show=('r', 'p', 'h'), method='console')
if not objects:
raise NotImplementedError('No objects matched by query')
elif len(objects) != 1:
raise NotImplementedError('Console only support one tunnel at time for now')
errs = Reporter()
for obj in objects:
if obj['r'] in ('vm',):
client = self.server.get_client(obj['p'])
try:
srv_to_host_tun = client.console(obj['h'])
except Exception as err:
errs.error(obj['id'], str(err))
else:
cli_tun = self.client.register_tunnel('console', client, srv_to_host_tun)
errs.success(obj['id'], 'tunnel started.', output=cli_tun.label)
else:
errs.error(obj['id'], 'bad role')
return errs.get_dict()
#
# Remote shell:
#
def shell(self, tql):
""" Start a remote shell on object matching the provided tql.
:param tql: tql matching only one object on which start the shell
:return: the label of the created tunnel
objects = self.client.list(tql, show=('r', 'p'), method='shell')
if not objects:
raise NotImplementedError('No objects matched by query')
elif len(objects) != 1:
raise NotImplementedError('Shell only support one tunnel at time for now')
errs = Reporter()
for obj in objects:
if obj['r'] in ('host', 'hv'):
client = self.server.get_client(obj['id'])
srv_to_host_tun = client.shell()
cli_tun = self.client.register_tunnel('shell', client, srv_to_host_tun)
errs.success(obj['id'], 'tunnel started.', output=cli_tun.label)
else:
errs.error(obj['id'], 'bad role')
return errs.get_dict()
@listed
def resize(self, label, row, col, xpixel, ypixel):
""" Send a resize event to the remote shell's tty.
:param label: label of the tty tunnel to resize
:param row: number of rows
:param col: number of columns
:param xpixel: unused
:param ypixel: unused
if label is None:
tuns = [(c, st.label) for t, c, ct, st
in self.client.tunnels.values() if t == 'shell']
else:
ttype, client, ctun, stun = self.client.get_tunnel(label)
if ttype != 'shell':
raise ValueError('Label does not refers on a shell')
tuns = [(client, stun.label)]
for client, label in tuns:
client.resize(label, row, col, xpixel, ypixel)
#
# Port forwarding:
#
def forward(self, login, port, destination='127.0.0.1'):
""" Forward a TCP port to the client.
:param login: login of the remote client on which establish the tunnel
:param port: port on which establish the tunnel on destination
:param destination: tunnel destination (from the remote client side)
self.client.check('forward', query='id=%s' % login)
# Create the tunnel to the node:
try:
host_client = self.server.get_client(login)
except KeyError:
raise KeyError('Specified client is not connected')
s2n_tun = host_client.forward(port, destination)
# Create tunnel to the CLI
c2s_tun = self.client.register_tunnel('forward', host_client, s2n_tun)
return c2s_tun.label
#
# Debug:
#
@listed
def dbstats(self):
""" Get statistics about tql database.
"""
return self.server.db.stats()
def forward_call(self, login, func, *args, **kwargs):
""" Forward a call to a connected client and return result.
:param login: login of the connected client
:param func: function to execute on the client
:param \*args, \*\*kwargs: arguments of the call
"""
self.client.check('forward_call')
client = self.server.get_client(login)
return client.conn.call(func, *args, **kwargs)
class CliClient(Client):
""" A cli client connected to the cc-server.
"""
ROLE = 'cli'
RPC_HANDLER = CliHandler
KILL_ALREADY_CONNECTED = True
def __init__(self, *args, **kwargs):
super(CliClient, self).__init__(*args, **kwargs)
self._tunnels = {} # Running tunnels for this client (as client)
@property
def tunnels(self):
""" Get active client tunnels by label (a dict).
"""
return self._tunnels
def spawn_job(self, job_class, **kwargs):
return self._server.jobs.spawn(job_class, self.login, **kwargs)
def register_tunnel(self, ttype, client, tun, label=None):
""" Create and register a tunnel for this client.
:param ttype: type of tunnel
:param client: client where the tunnel go
:param tun: the tunnel of this client
:param label: label of the tunnel to create
"""
def cb_on_shutdown(tun):
tun.cb_default_on_shutdown(tun)
# Delete the tunnel from the current running tunnels:
self.unregister_tunnel(tun.label)
ctun = self.conn.create_tunnel(label=label, endpoint=tun.socket,
on_shutdown=cb_on_shutdown,
close_endpoint_on_shutdown=False)
self._tunnels[ctun.label] = (ttype, client, ctun, tun)
return ctun
def get_tunnel(self, label):
""" Get the tunnel binded to the provided label.
:return: a tuple (type, remote_client, tunnel, remote_client_tunnel)
where: **type** is a string provided on tunnel creation,
**remote_client** the client object of the remote client on which
the tunnel is established, **tunnel** the cli-to-server tunnel
object from the sjRpc, **remote_client_tunnel** the
server-to-remote-client tunnel object from the sjRpc.
"""
return self._tunnels[label]
def unregister_tunnel(self, label):
try:
del self._tunnels[label]
except KeyError:
pass
def wall(self, sender, message):
""" Send a wall to the client.
"""
self.conn.call('wall', sender, message)
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class MultiCliClient(CliClient):
""" A bootstrap client connected to the cc-server.
"""
ROLE = 'mcli'
KILL_ALREADY_CONNECTED = False
def _get_tql_object(self):
tql_object = SObject(self.login)
tql_object.register(StaticTag('r', self.role))
tql_object.register(StaticTag('a', self._login))
self._server.db.register(tql_object)
return tql_object
@property
def login(self):
return '%s.%s' % (self._login, self.conn.get_fd())
@property
def role(self):
return 'cli'
def shutdown(self):
super(MultiCliClient, self).shutdown()
# Also, remote the object from the db:
self._server.db.unregister(self.login)
Client.register_client_class(MultiCliClient)
Client.register_client_class(CliClient)