def increaseCap():
group = autoscale.get_all_groups(names=['sw-ASG'])[0]
numInstances = group.desired_capacity
maxInstances = group.max_size
if maxInstances >= (numInstances + 1):
autoscale.set_desired_capacity('sw-ASG', numInstances + 1)
print("Size increased from "+ str(numInstances) + " to " + str(numInstances+1))
else:
print("You are already at Max capacity")
def decreaseCap():
group = autoscale.get_all_groups(names=['sw-ASG'])[0]
numInstances = group.desired_capacity
minInstances = group.min_size
if numInstances -1 >= minInstances:
autoscale.set_desired_capacity('sw-ASG', numInstances -1)
print("Size increased from "+ str(numInstances) + " to " + str(numInstances-1))
else:
print("You are already at Min capacity")
def get_machines(num_instances_to_use, aws_group_name):
machines = []
# connect to AWS
ec2 = boto.ec2.connect_to_region("us-west-2")
autoscale = boto.ec2.autoscale.AutoScaleConnection()
# how many machines are currently running?
group = autoscale.get_all_groups(names=[aws_group_name])[0]
num_instances = len(group.instances)
print(GetTime(), "Number of instances online:", len(group.instances))
# switch on more machines if we need them
if num_instances < num_instances_to_use:
print(GetTime(), "Launching instances...")
autoscale.set_desired_capacity(aws_group_name, num_instances_to_use)
# tell us status every few seconds
group = None
while num_instances < num_instances_to_use:
group = autoscale.get_all_groups(names=[aws_group_name])[0]
num_instances = len(group.instances)
print(GetTime(), "Number of instances online:", len(group.instances))
sleep(3)
# grab instance IDs
instance_ids = [i.instance_id for i in group.instances]
print(GetTime(), "These instances are online:", instance_ids)
instances = ec2.get_only_instances(instance_ids)
for instance in instances:
print(GetTime(), "Waiting for instance", instance.id, "to boot...")
while 1:
instance.update()
if instance.state == "running":
print(GetTime(), instance.id, "is running!")
break
sleep(3)
for instance_id in instance_ids:
print(GetTime(), "Waiting for instance", instance_id, "to report OK...")
while 1:
statuses = ec2.get_all_instance_status([instance_id])
if len(statuses) < 1:
sleep(3)
continue
status = statuses[0]
if status.instance_status.status == "ok":
print(GetTime(), instance.id, "reported OK!")
break
sleep(3)
for instance in instances:
machines.append(Machine(instance.ip_address))
return machines
def stop_instances():
autoscale = boto.ec2.autoscale.AutoScaleConnection()
group = autoscale.get_all_groups(names=['Daala'])[0]
autoscale.set_desired_capacity('Daala',0)
return 'ok'
'AWS instances, but the max is',max_num_instances_to_use,'.')
num_instances_to_use = max_num_instances_to_use
#connect to AWS
ec2 = boto.ec2.connect_to_region('us-west-2');
autoscale = boto.ec2.autoscale.AutoScaleConnection();
#how many machines are currently running?
group = autoscale.get_all_groups(names=['Daala'])[0]
num_instances = len(group.instances)
print(GetTime(),'Number of instances online:',len(group.instances))
#switch on more machines if we need them
if num_instances < num_instances_to_use:
print(GetTime(),'Launching instances...')
autoscale.set_desired_capacity('Daala',num_instances_to_use)
#tell us status every few seconds
group = None
while num_instances < num_instances_to_use:
group = autoscale.get_all_groups(names=['Daala'])[0]
num_instances = len(group.instances)
print(GetTime(),'Number of instances online:',len(group.instances))
sleep(3)
#grab instance IDs
instance_ids = [i.instance_id for i in group.instances]
print(GetTime(),"These instances are online:",instance_ids)
if 1:
instances = ec2.get_only_instances(instance_ids)
