def load_balance():
node_list = ['node1', 'node2', 'node3', 'node4']
node_cpu_list = [0, 0, 0, 0]
host_vm_dict = getHostVMDict()
vm_obj_list = []
used_cpu_count = 0
for vm_dict in host_vm_dict.itervalues():
for value in vm_dict.itervalues():
used_cpu_count += value.current_cpu
vm_obj_list.append(value)
avg_cpu = int(math.ceil(used_cpu_count / len(node_list)))
pickle_dict = {}
lock = LockFile("/var/lib/virtdc/framework/host_vm_dict.pkl")
with lock:
while (len(vm_obj_list) > 0):
max_cpu_vm = None
# pick a vm with the largest cpu number
for vm in vm_obj_list:
if max_cpu_vm is None:
max_cpu_vm = vm
if vm.current_cpu > max_cpu_vm.current_cpu:
max_cpu_vm = vm
# migrate the max-cpu vm to first available node
if vm_migrate_guest(get_host_name(max_cpu_vm.vmid), node_list[-1],
max_cpu_vm.vmid) is False:
return False
node_cpu_list[-1] += max_cpu_vm.current_cpu
# node is saturated if it has reached its balance quorum
if node_cpu_list[-1] >= avg_cpu:
node_list.pop()
node_cpu_list.pop()
# re-populate the vm pickle file
pickle_dict.setdefault(node_list[-1], {})
pickle_dict[node_list[-1]][max_cpu_vm.vmid] = max_cpu_vm
vm_obj_list.remove(max_cpu_vm)
with open('/var/lib/virtdc/framework/host_vm_dict.pkl',
'w') as pickle_out:
pickle.dump(pickle_dict, pickle_out)
#pickleNodeVMDictionary(pickle_dict)
return True
def load_balance():
node_list = ['node1', 'node2', 'node3', 'node4']
node_cpu_list = [ 0, 0, 0, 0 ]
host_vm_dict = getHostVMDict()
vm_obj_list = []
used_cpu_count = 0
for vm_dict in host_vm_dict.itervalues():
for value in vm_dict.itervalues():
used_cpu_count += value.current_cpu
vm_obj_list.append(value)
avg_cpu = int(math.ceil(used_cpu_count/len(node_list)))
pickle_dict = {}
lock = LockFile("/var/lib/virtdc/framework/host_vm_dict.pkl")
with lock:
while(len(vm_obj_list) > 0):
max_cpu_vm = None
# pick a vm with the largest cpu number
for vm in vm_obj_list:
if max_cpu_vm is None:
max_cpu_vm = vm
if vm.current_cpu > max_cpu_vm.current_cpu:
max_cpu_vm = vm
# migrate the max-cpu vm to first available node
if vm_migrate_guest(get_host_name(max_cpu_vm.vmid), node_list[-1], max_cpu_vm.vmid) is False:
return False
node_cpu_list[-1] += max_cpu_vm.current_cpu
# node is saturated if it has reached its balance quorum
if node_cpu_list[-1] >= avg_cpu:
node_list.pop()
node_cpu_list.pop()
# re-populate the vm pickle file
pickle_dict.setdefault(node_list[-1], {})
pickle_dict[node_list[-1]][max_cpu_vm.vmid] = max_cpu_vm
vm_obj_list.remove(max_cpu_vm)
with open('/var/lib/virtdc/framework/host_vm_dict.pkl','w') as pickle_out:
pickle.dump(pickle_dict, pickle_out)
#pickleNodeVMDictionary(pickle_dict)
return True
def force_migrate(vmid, source_host, dest_host): return vm_migrate_guest(source_host, dest_host,vmid)
def force_migrate(vmid, source_host, dest_host):
return vm_migrate_guest(source_host, dest_host, vmid)
def process_action_on_current_usage(host, vmid, value, cpu_usage, mem_usage, io_usage):
node_dict = GetNodeDict()
#for key, value in node_dict.iteritems() :
#print key, value.hostname, value.ip_address, value.max_cpu, value.max_memory, value.max_io, value.avail_cpu, value.avail_memory, value.avail_io
#Log activity
manager_activity_log = open('/var/lib/virtdc/logs/activity_logs/manager.log', 'a+')
manager_activity_log.write(str(datetime.datetime.now())+'::PLACEMENT MANAGER::MEMORY::'+host+' :: '+vmid+' :: Alotted Memory '+str(value.current_memory)+' :: Current Memory '+str(mem_usage)+'\n')
manager_activity_log.write(str(datetime.datetime.now())+'::PLACEMENT MANAGER::CPU::'+host+' :: '+vmid+' :: Alotted CPU '+str(value.current_cpu)+' :: Current CPU '+str(cpu_usage)+'\n')
obj=NodeFinder()
max_cpu = value.max_cpu
#print 'Max CPU '+str(max_cpu)
allotted_cpu = float(value.current_cpu)
#print 'Allocate CPU : '+str(allotted_cpu)
#Base OS should not go below the minimum memory
mem_usage = float(mem_usage) + float(_base_mem_size)
allotted_memory = float(value.current_memory)
max_memory = float(value.max_memory)
#Check CPU usage, regarding a 0.1 margin as eligible to scale up
if((cpu_usage+0.1 > allotted_cpu) and (cpu_usage < max_cpu)):
if ( obj.is_cpu_available_on_host(host, 1) ):
#print 'Test 2'
new_cpu_value = value.current_cpu + 1
print "New CPU: %s" % new_cpu_value
vm_cpu_scaling(host, vmid, value.vmip, new_cpu_value)
manager_activity_log.write(str(datetime.datetime.now())+'::PLACEMENT MANAGER::CPU::Scaling ::'+host+' :: '+vmid+' :: Memory scaled from '+str(value.current_cpu)+' to '+str(cpu_usage)+'\n')
else:
print 'Test 3'
new_host = obj.is_space_available_for_vm(cpu_usage, mem_usage , io_usage)
if new_host is None:
print "Cant migrate guest"
else:
print 'Dest Node : '+new_host
#Initiate vm migration
migrate_flag = vm_migrate_guest(host, new_host, vmid)
if (migrate_flag):
manager_activity_log.write(str(datetime.datetime.now())+'::PLACEMENT MANAGER::CPU::Migration ::'+host+' :: '+vmid+' :: Domain migrated from '+str(host)+' to '+str(new_host)+' for CPU Scaling from'+str(value.current_cpu)+' to '+str(cpu_usage)+'\n')
else:
manager_activity_log.write(str(datetime.datetime.now())+'::PLACEMENT MANAGER::CPU::Migration ::'+host+' :: '+vmid+' :: Cannot migrate from '+str(host)+' to '+str(new_host)+' for CPU Scaling from'+str(value.current_cpu)+' to '+str(cpu_usage)+'\n')
#if( (cpu_usage>current_cpu) and (cpu_usage<max_cpu) ): -- CPU scaling down is not implemented
#Check Memory Usage - Memory scale up will be initiated when usage is greater than usage+scaleup_threshold
#print "MEM USAGE: " + str(mem_usage)
#print "Alloc mem: " + str(allotted_memory)
#print "threadhold: " + str(float(mem_scale_up_threshold))
#print "Max mem: " + str(max_memory)
if(((mem_usage > (allotted_memory + float(mem_scale_up_threshold))))and (mem_usage<max_memory)):
required_extra_memory = mem_usage - allotted_memory
print "Required Mem: " + str(required_extra_memory)
if( obj.is_mem_available_on_host(host, required_extra_memory) ):
vm_memory_scaling(host, vmid, float(mem_usage))
manager_activity_log.write(str(datetime.datetime.now())+'::PLACEMENT MANAGER::MEMORY::Scaling ::'+str(host)+' :: '+str(vmid)+' :: Memory scaled from '+str(allotted_memory)+' to '+str(mem_usage)+'\n')
else:
new_host = obj.is_space_available_for_vm(cpu_usage, mem_usage , io_usage)
if new_host is None:
print "Cant migrate Guest"
else:
#Initiate vm migration
migrate_flag = vm_migrate_guest(host, new_host, vmid)
if (migrate_flag):
manager_activity_log.write(str(datetime.datetime.now())+'::PLACEMENT MANAGER::MEMORY::Migration ::'+host+' :: '+vmid+' :: Domain migrated from '+str(host)+' to '+str(new_host)+' for Memory Scaling from'+str(value.current_memory)+' to '+str(mem_usage)+'\n')
else:
manager_activity_log.write(str(datetime.datetime.now())+'::PLACEMENT MANAGER::MEMORY::Migration ::'+host+' :: '+vmid+' :: Cannot migrate from '+str(host)+' to '+str(new_host)+' for Memory Scaling from'+str(value.current_memory)+' to '+str(mem_usage)+'\n')
#To scale down memory - Memory scale down will be initiated when usage is lower than usage-scaledown_threshold or
elif((mem_usage<(allotted_memory - float(mem_scale_down_threshold)))and (mem_usage<max_memory) ):
vm_memory_scaling(host, vmid, float(mem_usage))
manager_activity_log.write(str(datetime.datetime.now())+'::PLACEMENT MANAGER::MEMORY::Scaling ::'+str(host)+' :: '+str(vmid)+' :: Memory scaled from '+str(allotted_memory)+' to '+str(mem_usage)+'\n')
def process_action_on_current_usage(host, vmid, value, cpu_usage, mem_usage,
io_usage):
node_dict = GetNodeDict()
#for key, value in node_dict.iteritems() :
#print key, value.hostname, value.ip_address, value.max_cpu, value.max_memory, value.max_io, value.avail_cpu, value.avail_memory, value.avail_io
#Log activity
manager_activity_log = open(
'/var/lib/virtdc/logs/activity_logs/manager.log', 'a+')
manager_activity_log.write(
str(datetime.datetime.now()) + '::PLACEMENT MANAGER::MEMORY::' + host +
' :: ' + vmid + ' :: Alotted Memory ' + str(value.current_memory) +
' :: Current Memory ' + str(mem_usage) + '\n')
manager_activity_log.write(
str(datetime.datetime.now()) + '::PLACEMENT MANAGER::CPU::' + host +
' :: ' + vmid + ' :: Alotted CPU ' + str(value.current_cpu) +
' :: Current CPU ' + str(cpu_usage) + '\n')
obj = NodeFinder()
max_cpu = value.max_cpu
#print 'Max CPU '+str(max_cpu)
allotted_cpu = float(value.current_cpu)
#print 'Allocate CPU : '+str(allotted_cpu)
#Base OS should not go below the minimum memory
mem_usage = float(mem_usage) + float(_base_mem_size)
allotted_memory = float(value.current_memory)
max_memory = float(value.max_memory)
#Check CPU usage, regarding a 0.1 margin as eligible to scale up
if ((cpu_usage + 0.1 > allotted_cpu) and (cpu_usage < max_cpu)):
if (obj.is_cpu_available_on_host(host, 1)):
#print 'Test 2'
new_cpu_value = value.current_cpu + 1
print "New CPU: %s" % new_cpu_value
vm_cpu_scaling(host, vmid, value.vmip, new_cpu_value)
manager_activity_log.write(
str(datetime.datetime.now()) +
'::PLACEMENT MANAGER::CPU::Scaling ::' + host + ' :: ' + vmid +
' :: Memory scaled from ' + str(value.current_cpu) + ' to ' +
str(cpu_usage) + '\n')
else:
print 'Test 3'
new_host = obj.is_space_available_for_vm(cpu_usage, mem_usage,
io_usage)
if new_host is None:
print "Cant migrate guest"
else:
print 'Dest Node : ' + new_host
#Initiate vm migration
migrate_flag = vm_migrate_guest(host, new_host, vmid)
if (migrate_flag):
manager_activity_log.write(
str(datetime.datetime.now()) +
'::PLACEMENT MANAGER::CPU::Migration ::' + host +
' :: ' + vmid + ' :: Domain migrated from ' +
str(host) + ' to ' + str(new_host) +
' for CPU Scaling from' + str(value.current_cpu) +
' to ' + str(cpu_usage) + '\n')
else:
manager_activity_log.write(
str(datetime.datetime.now()) +
'::PLACEMENT MANAGER::CPU::Migration ::' + host +
' :: ' + vmid + ' :: Cannot migrate from ' +
str(host) + ' to ' + str(new_host) +
' for CPU Scaling from' + str(value.current_cpu) +
' to ' + str(cpu_usage) + '\n')
#if( (cpu_usage>current_cpu) and (cpu_usage<max_cpu) ): -- CPU scaling down is not implemented
#Check Memory Usage - Memory scale up will be initiated when usage is greater than usage+scaleup_threshold
#print "MEM USAGE: " + str(mem_usage)
#print "Alloc mem: " + str(allotted_memory)
#print "threadhold: " + str(float(mem_scale_up_threshold))
#print "Max mem: " + str(max_memory)
if (((mem_usage > (allotted_memory + float(mem_scale_up_threshold))))
and (mem_usage < max_memory)):
required_extra_memory = mem_usage - allotted_memory
print "Required Mem: " + str(required_extra_memory)
if (obj.is_mem_available_on_host(host, required_extra_memory)):
vm_memory_scaling(host, vmid, float(mem_usage))
manager_activity_log.write(
str(datetime.datetime.now()) +
'::PLACEMENT MANAGER::MEMORY::Scaling ::' + str(host) +
' :: ' + str(vmid) + ' :: Memory scaled from ' +
str(allotted_memory) + ' to ' + str(mem_usage) + '\n')
else:
new_host = obj.is_space_available_for_vm(cpu_usage, mem_usage,
io_usage)
if new_host is None:
print "Cant migrate Guest"
else:
#Initiate vm migration
migrate_flag = vm_migrate_guest(host, new_host, vmid)
if (migrate_flag):
manager_activity_log.write(
str(datetime.datetime.now()) +
'::PLACEMENT MANAGER::MEMORY::Migration ::' + host +
' :: ' + vmid + ' :: Domain migrated from ' +
str(host) + ' to ' + str(new_host) +
' for Memory Scaling from' +
str(value.current_memory) + ' to ' + str(mem_usage) +
'\n')
else:
manager_activity_log.write(
str(datetime.datetime.now()) +
'::PLACEMENT MANAGER::MEMORY::Migration ::' + host +
' :: ' + vmid + ' :: Cannot migrate from ' +
str(host) + ' to ' + str(new_host) +
' for Memory Scaling from' +
str(value.current_memory) + ' to ' + str(mem_usage) +
'\n')
#To scale down memory - Memory scale down will be initiated when usage is lower than usage-scaledown_threshold or
elif ((mem_usage < (allotted_memory - float(mem_scale_down_threshold)))
and (mem_usage < max_memory)):
vm_memory_scaling(host, vmid, float(mem_usage))
manager_activity_log.write(
str(datetime.datetime.now()) +
'::PLACEMENT MANAGER::MEMORY::Scaling ::' + str(host) + ' :: ' +
str(vmid) + ' :: Memory scaled from ' + str(allotted_memory) +
' to ' + str(mem_usage) + '\n')
