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ec2_instances.py
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ec2_instances.py
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#!/usr/bin/python2
import sys
import datetime
import argparse
from ec2_watchdata import WatchData
def main():
global configuration
WatchData.stats_period = 60 # Show just last measure
data = WatchData(configuration.group)
data.connect()
data.get_instances_info()
""" Check if we must change the desired instances """
if configuration.instances > 1:
desired = configuration.instances
if desired > 0 and abs(data.instances - desired) < 3:
data.set_desired(desired)
else:
print "You can specify up to +-2 instances more of currently running (%d)" % (
data.instances, )
exit(0)
if configuration.kill:
if configuration.kill in [x.id for x in data.instances_info]:
data.kill_instance(configuration.kill, True)
else:
print "Instance", configuration.kill, "doesn't exist"
exit(0)
data.get_CPU_loads()
print "Group values: instances: %d min: %d max: %d desired: %d Launch config: %s" % (
data.instances, data.min_size, data.max_size,
data.desired, data.group['LaunchConfigurationName'])
for i, d in data.instances_info.iteritems():
if i in data.loads:
load = data.loads[i]
else:
load = 0
print "%s %5.2f%% %s %s" % (i, load, d['State']['Name'], d['ImageId']),
print "%s %s %-15s" % ( d['InstanceType'], d['Placement']['AvailabilityZone'],
d['NetworkInterfaces'][0]['PrivateIpAddress']),
if configuration.all:
print "%-15s" % (
d['NetworkInterfaces'][0]['PrivateDnsName'])
else:
print
print "Average load: %5.2f%%" % (data.avg_load, )
if data.instances > 1:
print "Average load with %d instances: %5.2f%%" % (
data.instances - 1, data.total_load / (data.instances - 1))
if __name__ == '__main__':
parser = argparse.ArgumentParser()
parser.add_argument(
"--group", "-g", default="web", help="AutoScaler group")
parser.add_argument(
"--all",
"-a",
action="store_true",
help="Show more info for every instance")
group = parser.add_mutually_exclusive_group()
group.add_argument("--kill", "-k", help="Kill instance")
group.add_argument(
"--instances",
"-i",
type=int,
help="Set the number of desired instances")
configuration = parser.parse_args()
main()