def determine_current_allocation():
try:
# Connect with all servers
from virtual import util
connections = util.connect_all()
allocation = { host : [] for host in nodes.NODES }
for host in nodes.NODES:
connection = connections[host]
vir_domains = connection.listDomainsID()
for vir_id in vir_domains:
vir_domain = connection.lookupByID(vir_id)
name = vir_domain.name()
if domains.has_domain(name):
# print 'adding mapping with %s' % name
allocation[host].append(name)
else:
print 'ERROR: Domain %s is not in the domain list!' % name
finally:
print 'Closing connections...'
util.close_all(connections)
return allocation
def migrateAllocation(migrations):
try:
# Connect with all servers
from virtual import util
connections = util.connect_all()
# trigger migrations
for migration in migrations:
domain_name = migration[0]
target_node = nodes.get_node_name(migration[1])
# Search the node which currently holds the domain
domain, _ = __find_domain(connections, domain_name)
if domain == None:
print 'WARN: skipping - domain not found: %s' % (domain_name)
continue
# If not running start on source (necessary for migrations?)
state = domain.state(0)[0]
if state != 1:
# Destroy
print 'Resetting the domain %s' % (domain_name)
try:
domain.destroy()
except: pass
# Start
try:
domain.create()
time.sleep(10)
except: pass
# Undefine target domain if it already exists
try:
dom_target = connections[target_node].lookupByName(domain_name)
if dom_target != None:
dom_target.undefine()
print 'Undefined already exiting target domain'
except:
pass
# Migrate to target
try:
print 'Migrating domain: %s to node: %s ...' % (domain_name, connections[target_node].getHostname())
domain = domain.migrate(connections[target_node],
VIR_MIGRATE_LIVE | VIR_MIGRATE_UNDEFINE_SOURCE | VIR_MIGRATE_PERSIST_DEST,
domain_name, None, 0)
print 'Migration successful'
except:
traceback.print_exc(file=sys.stdout)
print 'Skipping - migration failed'
except:
traceback.print_exc(file=sys.stdout)
finally:
# Close connections
util.close_all(connections)
def main():
# Dump configuration
print 'Cloning: %s ' % clone_names
# Create drones
drones.main()
# Connect
global connections
connections = util.connect_all()
try:
# Shutdown all running VMs
shutdownall()
reactor.callLater(0, next_vm)
print 'Starting reactor'
reactor.run()
print 'Reactor returned'
finally:
util.close_all(connections)