Created
December 7, 2016 15:38
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EC2 Reserved Instance auditing
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import boto.ec2 | |
def get_running_instances(region): | |
ec2 = boto.ec2.connect_to_region(region) | |
instances = [i for r in ec2.get_all_reservations() for i in r.instances] | |
return filter(lambda i: i.state == 'running', instances) | |
def get_reserved_instances(region): | |
ec2 = boto.ec2.connect_to_region(region) | |
reserved_instances = ec2.get_all_reserved_instances() | |
return filter(lambda i: i.state == 'active', reserved_instances) | |
def get_ri_table(running_instances, reserved_instances): | |
table = {} | |
for i in running_instances: | |
key = (i.vpc_id is not None, i.placement, i.instance_type) | |
if key not in table: | |
table[key] = {'running': 0, 'reserved': 0} | |
table[key]['running'] += 1 | |
for ri in reserved_instances: | |
key = ('VPC' in ri.description, ri.availability_zone, ri.instance_type) | |
if key not in table: | |
table[key] = {'running': 0, 'reserved': 0} | |
table[key]['reserved'] += ri.instance_count | |
return table | |
def print_ri_table(table, header): | |
header_template = "{5} {0:18} {6}|{5} {1:15} {6}|{5} {2:10} {6}|{5} {3:10} {6}|{5} {4:10}{6}" | |
row_template = "{5} {0:18} {6}|{5} {1:15} {6}|{5} {2:10d} {6}|{5} {3:10d} {6}|{5} {4:10d}{6}" | |
keys = table.keys() | |
keys.sort() | |
print "\033[1;37;49m {0} \033[00m\n".format(header) | |
print header_template.format("Availability Zone", "Instance Type", "RIs", "Instances", "Diff", "\033[1;37;49m", "\033[00m") | |
print "-" * 78 | |
for key in keys: | |
value = table[key] | |
diff = value['reserved'] - value['running'] | |
color = "\033[0;37;49m" | |
if diff < 0: | |
color = "\033[0;31;49m" | |
elif diff > 0: | |
color = "\033[0;34;49m" | |
print row_template.format(key[1], key[2], value['reserved'], value['running'], diff, color, "\033[00m") | |
def main(): | |
running_instances = get_running_instances('us-east-1') | |
reserved_instances = get_reserved_instances('us-east-1') | |
table = get_ri_table(running_instances, reserved_instances) | |
print_ri_table({x:y for x,y in table.iteritems() if x[0] == False}, 'EC2-Classic') | |
print "\n" | |
print_ri_table({x:y for x,y in table.iteritems() if x[0] == True}, 'EC2-VPC') | |
if __name__ == '__main__': | |
main() |
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