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deployEC2.py
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deployEC2.py
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#!/usr/bin/env python
#TODO
# Error handling
# EBS Support
import sys
sys.path.append(".")
sys.path.append("lib")
import time
from boto.pyami.config import Config
from boto.ec2.connection import EC2Connection
import logger
import getopt
import ConfigParser
SSH_OPTS = '-o StrictHostKeyChecking=no -i '
log = logger.new_logger("deployEC2")
class ManageEC2(object):
instance_ids = []
def __init__(self):
self.aws_access_key_id = None
self.aws_secret_access_key = None
self.ami = None
self.key_name = None
self.instance_type = None
self.zone = None
self.security_groups = None
self.os = None
self.num_nodes = None
self.ssh_username = None
self.ssh_key_path = None
self.membase_port = None
self.rest_username = None
self.rest_password = None
self.num_ebs = None
self.ebs_size = None
def loadConfig(self, path=None):
# Get all the Configuration
config = Config(path=path)
self.aws_access_key_id = config.get('Credentials','aws_access_key_id')
self.aws_secret_access_key = config.get('Credentials','aws_secret_access_key')
self.key_name = config.get('Key','key_name')
self.instance_type = config.get('Instance','instance_type')
self.zone = config.get('Instance','zone', default='us-east-1c')
self.security_groups = config.get('Instance','security_groups')
self.tags = config.get('Instance', 'tags')
self.os = config.get('Type','os')
self.num_nodes = int(config.get('Type','num_nodes'))
self.ami = config.get('AMI',self.os)
self.ebs_size = int(config.get('EBS','volume_size', default=0))
self.num_ebs = int(config.get('EBS','volumes', default=0))
self.membase_port = config.get('global', 'port', default='8091')
self.ssh_username = config.get('global', 'username', default='root')
self.ssh_key_path = config.get('global', 'ssh_key', default='/root/.ssh/QAkey.pem')
self.rest_username = config.get('membase','rest_username', default='Administrator')
self.rest_password = config.get('membase','rest_password', default='password')
def launchInstances(self):
log.info('Starting {0} EC2 instances of type {1} with image {2}'.format(self.num_nodes, self.os, self.ami))
try:
conn = EC2Connection(self.aws_access_key_id, self.aws_secret_access_key)
reservation = conn.run_instances(self.ami, max_count = self.num_nodes, key_name = self.key_name,
security_groups = [self.security_groups], instance_type = self.instance_type,
placement = self.zone)
log.info('ReservationID: {0}'.format(reservation.id))
log.info('Instances: {0}'.format(ManageEC2.get_instances(reservation)))
#wait for instances to boot up
self.wait_for_instances_to_boot(reservation)
self.create_instance_tags(reservation, prefix=self.tags)
if self.num_ebs > 0:
ManageEC2.launchEBS(conn, reservation, self)
finally:
return conn, reservation
@staticmethod
def launchEBS(conn, reservation, self):
ebs = []
total_ebs = self.num_ebs * self.num_nodes
log.info("Launching {0} EBS volumes in zone {1}".format(total_ebs, self.zone))
while total_ebs > 0 :
ebs_id = conn.create_volume(self.ebs_size, self.zone)
log.info("EBS volume created {0}".format(ebs_id.id))
ebs.append(ebs_id.id)
total_ebs -= 1
ebs = ManageEC2.utf8_decode_list(ebs)
log.info("EBS volume ids {0}".format(ebs))
ManageEC2.attach_ebs(conn, ManageEC2.get_instances(reservation), ebs, self.num_ebs)
@staticmethod
def create_instance_tags(reservation, prefix):
log.info("Creating instance tags with prefix {0}".format(prefix))
for i in range(len(reservation.instances)):
current_instance = reservation.instances[i]
current_instance.add_tag('Name', prefix+'-{0}'.format(i))
@staticmethod
def wait_for_instances_to_boot(reservation, timeout_in_seconds=300):
log.info('Wait for instances to boot up in {0} secs'.format(timeout_in_seconds))
start = time.time()
for i in range(len(reservation.instances)):
current_instance = reservation.instances[i]
while not current_instance.update() == 'running' and (time.time() - start) <= timeout_in_seconds:
log.info("{0} -> {1}".format(current_instance.id, current_instance.state))
time.sleep(5)
else:
log.info("{0} -> {1}".format(current_instance.id, current_instance.state))
@staticmethod
def get_instances(reservation=None):
ids = []
for i in range(len(reservation.instances)):
ids.append(reservation.instances[i].id)
return ManageEC2.utf8_decode_list(ids)
@staticmethod
def get_instance_public_dns(reservation=None):
public_dns = []
for i in range(len(reservation.instances)):
public_dns.append(reservation.instances[i].public_dns_name)
log.info("Public IPs: {0}".format(ManageEC2.utf8_decode_list(public_dns)))
return public_dns
@staticmethod
def get_instance_private_dns(reservation=None):
private_dns = []
for i in range(len(reservation.instances)):
private_dns.append(reservation.instances[i].private_dns_name)
log.info("Private IPs: {0}".format(ManageEC2.utf8_decode_list(private_dns)))
return private_dns
def terminate_instances(self, conn, reservation):
ids = self.get_instances(reservation)
conn.terminate_instances(instance_ids=ids)
log.info("Terminate instances {0}".format(ids))
@staticmethod
def utf8_decode_list(l):
new_list = []
for item in l:
if isinstance(item, unicode):
new_list.append(item.encode('utf-8'))
return new_list
@staticmethod
def attach_ebs(conn=None, instance_ids=[], volumes=[], num_ebs_per_node=0):
print conn, instance_ids, volumes, num_ebs_per_node
if conn is None:
log.error("No EC2 Connection")
sys.exit(1)
log.info("Will try to attach {0} to {1}".format(volumes, instance_ids))
devices = ['f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p']
i = 0
for instance in instance_ids:
j = 0
print instance, num_ebs_per_node
while j < num_ebs_per_node :
ready = conn.attach_volume(volumes[i], instance, device = '/dev/sd'+devices[j])
print ready
if ready:
log.info("Attached {0} to {1}".format(volumes[i], instance))
i += 1
j += 1
else:
log.error("Unable to attach {0} to {1}".format(volumes[i], instance))
def usage(err=None):
print """\
Launches EC2 Servers and returns a INI file with the list of servers instantiated
Syntax: deployEC2.py [options]
Options:
-h Help
-l <config_file> Path to .conf file containing EC2 information
-f <output_filename> Path to .ini file which is outputted, default servers.ini
Examples:
python deployEC2.py -l /etc/boto.cfg -f my_ec2.ini
"""
sys.exit(err)
def write_config(filepath, dns, public_dns):
config = ConfigParser.SafeConfigParser()
config.add_section("global")
config.set("global", "username", ec2.ssh_username)
config.set("global", "ssh_key", ec2.ssh_key_path)
config.set("global", "port", ec2.membase_port)
config.add_section("servers")
for i in range(len(dns)):
config.set("servers", "# "+str(i+1), public_dns[i].encode('utf-8'))
config.set("servers", str(i+1), dns[i].encode('utf-8'))
config.add_section("membase")
config.set("membase", "rest_username", ec2.rest_username)
config.set("membase", "rest_password", ec2.rest_password)
# write to file
FILE = open(filepath, "w")
log.info("Writing server information into {0}".format(filepath))
config.write(FILE)
FILE.close()
if __name__ == "__main__":
ec2 = ManageEC2()
filepath = "servers.ini"
conn = None
reservation = None
try:
(opts, args) = getopt.getopt(sys.argv[1:], 'hl:f:', [])
for options, argument in opts:
if options == "-h":
usage()
if options == "-l":
ec2.loadConfig(path=argument)
if options == "-f":
filepath = argument
except IndexError:
usage()
except getopt.GetoptError, err:
usage("ERROR: " + str(err))
try:
conn, reservation = ec2.launchInstances()
write_config(filepath, ManageEC2.get_instance_private_dns(reservation), ManageEC2.get_instance_public_dns(reservation))
except Exception as ex:
log.error("Exception {0}".format(ex))
if reservation is None:
log.error("No connection object")
else:
ec2.terminate_instances(conn, reservation)
sys.exit(1)