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deploy.py
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deploy.py
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import boto, time, sys, logging, getopt
from boto import regioninfo
from boto import ec2
import boto.ec2.elb
from boto.ec2.image import Image
myopts, args = getopt.getopt(sys.argv[1:],"d:p:t:m:")
usage = "Usage: %s -d [String. Config file directory path] -p [String. Production load balancer name] -t [Integer. Total number of instanced to produce. Optional - default 2] -m [Integer. Timeout in minutes for each step. Optional - default 5]" % sys.argv[0]
total_instances = 2
minutes = 5
if len(sys.argv) < 5:
print(usage)
sys.exit(1)
for o, a in myopts:
if o == '-d':
configPath = a
elif o == '-p':
lb_name = a
elif o == '-t':
total_instances = int(a)
elif o == '-m':
minutes = int(a)
else:
print(usage)
sys.exit(1)
# Definitions
config = {}
execfile(configPath + "/deploy.conf", config)
ACCESS_KEY_ID = config["ACCESS_KEY_ID"]
SECRET_ACCESS_KEY = config["SECRET_ACCESS_KEY"]
REGION = config["REGION"]
STAGER_ID = config["STAGER_ID"]
INSTANCE_TYPE = config["INSTANCE_TYPE"]
SECURITY_GROUP = config["SECURITY_GROUP"]
KEY_PAIR = config["KEY_PAIR"]
BASE_PATH = config["BASE_PATH"]
timeout = time.time() + (60 * minutes)
base = 10
logging.basicConfig(filename= BASE_PATH + 'deploy.log',level=logging.INFO) # use DEBUG for full report
conn = boto.ec2.connect_to_region(REGION, aws_access_key_id=ACCESS_KEY_ID, aws_secret_access_key=SECRET_ACCESS_KEY )
elb = boto.ec2.elb.connect_to_region(REGION, aws_access_key_id=ACCESS_KEY_ID, aws_secret_access_key=SECRET_ACCESS_KEY)
def trace(msg):
print msg
logging.info(msg)
def create_image(self, instance_id, name,
description=None,
no_reboot=True,
dry_run=False,
block_device_map=None):
params = {
'InstanceId': instance_id,
'Name': name }
if description:
params[ 'Description' ] = description
if no_reboot:
params[ 'NoReboot' ] = 'true'
if dry_run:
params[ 'DryRun' ] = 'true'
if block_device_map:
block_device_map.ec2_build_list_params( params )
img = self.get_object( 'CreateImage', params, Image, verb='POST' )
return img.id
def create_AMI(new=True, instance_id=None):
if new:
instance_name = 'Deploy_' + str(time.strftime('%Y-%m-%d_%H-%M-%S',time.gmtime()))
image_id = create_image(conn, STAGER_ID,instance_name)
else:
instance_name = 'Production_' + str(time.strftime('%Y-%m-%d_%H-%M-%S',time.gmtime()))
image_id = create_image(conn, instance_id,instance_name)
trace(image_id)
return image_id
def getImageStatus(image_id):
return conn.get_image(image_id).state
def getInstanceStatus(instance_id):
return conn.get_all_instances(instance_ids=[instance_id])[0].instances[0].state
def waitAndReport(type,done,type_id,counter):
counter = counter+1
time.sleep(base)
status = options[type](type_id)
trace('%s %s status %s ' % (type , str(type_id), status))
if status == done:
return
elif status == 'failed':
sys.exit(1)
elif counter >= timeout/base:
sys.exit(1)
else:
waitAndReport(type,done,type_id,counter)
def add_to_lb(load_balancer,instance_list):
start = []
counter = 0
for instance_id in instance_list:
load_balancer.register_instances(instance_id)
trace('Adding %s to ELB %s' % (instance_id, load_balancer.name))
start.append(time.time())
for instance_id in instance_list:
while True:
health = load_balancer.get_instance_health([instance_id])[0]
assert health.instance_id == instance_id
assert time.time() < timeout
if health.state == 'InService':
trace('Instance %s now successfully InService in ELB %s (took %d seconds)' % (instance_id, load_balancer.name, time.time() - start[counter]))
counter = counter +1
break
time.sleep(1)
def remove_from_lb(load_balancer,instance_id):
if instance_id in [i.id for i in load_balancer.instances]:
load_balancer.deregister_instances(instance_id)
trace('Removing %s from ELB %s' % (instance_id, load_balancer.name))
while True:
health = load_balancer.get_instance_health([instance_id])[0]
assert health.instance_id == instance_id
assert time.time() < timeout
if health.state == 'OutOfService':
break
trace('Waiting for removal...')
time.sleep(1)
# Main
try:
trace('\n\n\n----------------------------------------------------')
trace('Script started @ ' + str(time.strftime('%Y-%m-%d %H:%M:%S',time.gmtime())))
instance_list = []
new_instance_list = []
options = {'Image' : getImageStatus,
'Instance' : getInstanceStatus,
}
# Get old images from load balancer
load_balancer = elb.get_all_load_balancers([lb_name])[0]
for instance_info in load_balancer.instances:
if instance_info != None:
print instance_info.id
instance_list.append(str(instance_info.id))
try:
trace(load_balancer)
except Exception,e:
print e
sys.exit(1)
# Create AMI from stager
image_id = create_AMI()
waitAndReport('Image','available',image_id,0)
trace("Currently running instances:")
trace(instance_list)
#Create instances from AMI
for x in range(0, total_instances):
new_instance = conn.run_instances(
image_id,
key_name=KEY_PAIR,
instance_type=INSTANCE_TYPE,
security_groups=[SECURITY_GROUP])
new_instance_list.append(str(new_instance.instances[0].id))
waitAndReport('Instance','running',new_instance.instances[0].id,0)
trace("Newly created instances:")
trace(new_instance_list)
add_to_lb(load_balancer,new_instance_list)
for instance_info in instance_list:
remove_from_lb(load_balancer,instance_info)
# Create AMI from production instance
trace('Create ami from production instance')
image_id = create_AMI(False, instance_list[0])
waitAndReport('Image','available',image_id,0)
for instance_info in instance_list:
trace("Terminate %s " % (str(instance_info)))
conn.terminate_instances(instance_ids=[instance_info])
trace('Script ended @ ' + str(time.strftime('%Y-%m-%d %H:%M:%S',time.gmtime())))
trace('Complete')
except Exception,e:
trace(e)
trace('Failure')