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ec2_create.py
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ec2_create.py
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import boto3
import configparser
from time import sleep
from datetime import datetime, timezone
import argparse
import mysql.connector
from mysql.connector import Error
from pprint import pprint
"""
TODO: Expand code to create multiple instances with separate tags
TODO: Create function to terminate instance
TODO: Automate instance termination.
"""
def create_instance(config):
"""
boto3 based function to create a spot EC2 instance.
"""
session = boto3.session.Session()
client = session.client("ec2")
req = client.request_spot_instances(
InstanceCount= 1, # int(config.get("EC2", "instance_count")),
Type=config.get("EC2", "instance_run_type"),
InstanceInterruptionBehavior=config.get("EC2", "instance_interrupt_type"),
LaunchSpecification={
"SecurityGroups": [config.get("EC2", "security_group")],
"ImageId": config.get("EC2", "ami"),
"InstanceType": config.get("EC2", "instance_machine_type"),
"KeyName": config.get("EC2", "key_pair"),
"Placement": {
"AvailabilityZone": config.get("EC2", "instance_availability_zone")
},
"SubnetId": config.get("EC2", "subnet_id"),
"IamInstanceProfile": {"Arn": config.get("EC2", "iam_role")},
},
SpotPrice=config.get("EC2", "max_bid"),
)
print(
"Spot instance request success, status: " + req["SpotInstanceRequests"][0]["State"]
)
while True:
sleep(1)
current_req = client.describe_spot_instance_requests(
SpotInstanceRequestIds=[
req["SpotInstanceRequests"][0]["SpotInstanceRequestId"]
]
)
if current_req["SpotInstanceRequests"][0]["State"] == "active":
instance_id = current_req["SpotInstanceRequests"][0]["InstanceId"]
create_time = current_req["SpotInstanceRequests"][0]["CreateTime"]
print(
"Instance allocated ,Id: ",
instance_id
)
instance_state = client.describe_instances(
InstanceIds=[instance_id]
)["Reservations"][0]["Instances"][0]["State"]["Name"]
client.create_tags(
Resources=[instance_id],
Tags=[
{"Key": "Name", "Value": config.get("EC2", "tag")},
{"Key": "CreatedBy", "Value": config.get("EC2", "created_by")},
{"Key": "Team", "Value": config.get("EC2", "team")},
{
"Key": "Service Type",
"Value": config.get("EC2", "service_type"),
},
],
)
return (instance_id, create_time, instance_state)
print("Waiting...", sleep(10))
def create_connection(host_name, user_name, user_password, db_name):
connection = None
try:
connection = mysql.connector.connect(
host=host_name,
user=user_name,
passwd=user_password,
database=db_name
)
print("Connection to MySQL DB successful")
except Error as e:
print(f"The error '{e}' occurred")
return connection
def update_db(args, list_keys,list_val_type, list_vals):
if all([args.host, args.user, args.db, args.table]):
connection = create_connection(args.host, args.user, args.passwd, args.db)
sql = " INSERT INTO " + args.table + " (" + ",".join(list_keys) + \
") VALUES ("+ ",".join(list_val_type) + ")"
val = list_vals[0]
cursor = connection.cursor()
try:
cursor.execute(sql, val)
connection.commit()
print("Query executed successfully")
except Error as e:
print(f"The error '{e}' occurred")
else:
print("Must provide -host, -user, -db -table "
"values to update database")
def remove_ignore_items(config, list_ignore_keys,
list_ignore_val):
list_keys = [k for k,_ in config.items("EC2")]
list_val_temp = [v for _,v in config.items("EC2")]
list_ignore_index = []
for cnt, val in enumerate(list_keys):
if val in list_ignore_keys:
list_ignore_index.append(cnt)
for cnt, val in enumerate(list_val_temp):
if val in list_ignore_val:
list_ignore_index.append(cnt)
list_ignore_index = sorted(list(set(list_ignore_index)), reverse=True)
for i in list_ignore_index:
del list_keys[i]
del list_val_temp[i]
return (list_keys, list_val_temp)
def parse_cmd_args():
my_parser = argparse.ArgumentParser()
my_parser.add_argument('-config', action='store',
type=str, default='config.cfg')
my_parser.add_argument('-host', action='store',
type=str, default='')
my_parser.add_argument('-user', action='store',
type=str, default='')
my_parser.add_argument('-passwd', action='store',
type=str, default='')
my_parser.add_argument('-db', action='store',
type=str, default='')
my_parser.add_argument('-table', action='store',
type=str, default='')
args = my_parser.parse_args()
return args
if __name__ == "__main__":
args = parse_cmd_args()
config = configparser.ConfigParser()
config.read(args.config)
list_ignore_val = ['']
list_ignore_keys = ['instance_count']
(list_keys_config, list_val_temp_config) = remove_ignore_items(
config,
list_ignore_keys,
list_ignore_val)
instance_count = int(config.get("EC2", "instance_count"))
for cnt in range(0, instance_count):
(instance_id, create_time, instance_state) = create_instance(config)
create_time_str = create_time.strftime('%Y-%m-%d %H:%M:%S')
print('instance_id: {}, create_time: {}, instance_state: {}'.format(
instance_id, create_time.strftime('%Y-%m-%d %H:%M:%S'), instance_state))
list_keys = ['instance_id', 'create_time', 'instance_state' ] + list_keys_config
list_vals = []
list_val_temp = tuple([instance_id, create_time_str, instance_state] +
list_val_temp_config)
list_vals.append(list_val_temp)
list_val_type = ['%s']*len(list_keys)
if args.host:
update_db(args, list_keys,list_val_type, list_vals)
# list_keys.pop(list_ignore_val)
# del list_keys[list_ignore_index]
# print("INDEX of Empty Values: {}".format(list_key_empty))
# print("LIST VALS: {}".format(list_vals))
# create_time = datetime(2020, 11, 22, 3, 48, 56)
# create_time_str = create_time.strftime('%Y-%m-%d %H:%M:%S')
# print("current time in str: ", create_time_str )
# list_keys = ['instance_id', 'create_time', 'instance_state']
# list_val_type = ['%s']*len(list_keys)
# print("VAL TYPE: ", list_val_type)
# list_vals = [('i-36f825h342d993s76', create_time.strftime('%Y-%m-%d %H:%M:%S'),
# 'pending')]
# instance_id, create_time, instance_state
# execute_query(connection, insert_query)
# for section in config["EC2"]:
# print("SECTION VAL: ", section)
# print("Config File Read SUCCESS")
# utc_dt = datetime.now(timezone.utc)
# dt = utc_dt.astimezone()
# print("CURRENT TIME: ", dt.strftime('%Y-%m-%d %H:%M:%S'))