8000 ec2 boto3 · techiescamp/python-for-devops@30881a2 · GitHub
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ec2 boto3
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+184
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‎boto3/create-instance.py

Lines changed: 136 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,139 @@
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#! /bin/python3
22

3-
import boto3
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import boto3, os
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from botocore.exceptions import ClientError
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vpc_id = "vpc-0d42bf2f27be967ff"
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subnet_id = "subnet-00b5ede5e160caa59"
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ami_id = "ami-0ddf424f81ddb0720"
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instance_type = "t2.small"
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app_name = "flask"
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create_key = True
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key_name = "dev-key"
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key_location = "/Users/bibinwilson/.ssh/devops-class/"
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ec2 = boto3.client('ec2')
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def createSecurityGroup():
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global security_group_id
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try:
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response = ec2.create_security_group(GroupName=app_name + "-sg",
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Description=app_name + "Security Group",
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VpcId=vpc_id,
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TagSpecifications=[
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{
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'ResourceType': 'security-group',
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'Tags': [
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{
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'Key': 'Name',
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'Value': app_name + "-sg"
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}
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]
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},
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],
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)
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security_group_id = response['GroupId']
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print('Security Group Created %s in vpc %s.' % (security_group_id, vpc_id))
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data = ec2.authorize_security_group_ingress(
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GroupId=security_group_id,
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IpPermissions=[
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{
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'IpProtocol': 'tcp',
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'FromPort': 80,
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'ToPort': 80,
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'IpRanges': [
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{
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'CidrIp': '0.0.0.0/0'
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}
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]
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},
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{
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'IpProtocol': 'tcp',
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'FromPort': 22,
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'ToPort': 22,
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'IpRanges': [
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{
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'CidrIp': '0.0.0.0/0'
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}
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]
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}
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])
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print('Ingress Successfully Set %s' % data)
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except ClientError as e:
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print(e)
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def createKeyPair():
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try:
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key_pair = ec2.create_key_pair(KeyName=key_name)
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ssh_private_key = key_pair["KeyMaterial"]
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with os.fdopen(os.open(key_location + "app-key.pem", os.O_WRONLY | os.O_CREAT, 0o400), "w+") as handle:
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handle.write(ssh_private_key)
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except ClientError as e:
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print(e)
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def createInstance():
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blockDeviceMappings = [
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{
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'DeviceName': "/dev/sda1",
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'Ebs': {
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'DeleteOnTermination': True,
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'VolumeSize': 20,
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'VolumeType': 'gp2'
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}
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},
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]
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instances = ec2.run_instances(
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ImageId= ami_id,
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MinCount=1,
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MaxCount=1,
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InstanceType=instance_type,
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SubnetId=subnet_id,
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KeyName=key_name,
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SecurityGroupIds=[security_group_id],
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BlockDeviceMappings=blockDeviceMappings,
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TagSpecifications=[
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{
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'ResourceType': 'instance',
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'Tags': [
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{
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'Key': 'Name',
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'Value': app_name + "-server"
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}
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]
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},
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{
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'ResourceType': 'volume',
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'Tags': [
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{
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'Key': 'Name',
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'Value': app_name + "-root-disk"
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}
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]
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}
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]
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)
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print(instances["Instances"][0]["InstanceId"])
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if __name__ == "__main__":
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createSecurityGroup()
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if create_key == True:
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createKeyPair();
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createInstance()
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# References
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# [1] https://codeflex.co/boto3-create-ec2-with-tags/
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# [2] https://www.learnaws.org/2020/12/16/aws-ec2-boto3-ultimate-guide/
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# [3] https://arjunmohnot.medium.com/aws-ec2-management-with-python-and-boto-3-59d849f1f58f
4139

‎database/postgresql.py

Lines changed: 29 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,29 @@
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import psycopg2
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try:
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connection = psycopg2.connect(database="dvdrental",
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host="192.168.5.5",
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user="postgres",
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password="myPassword",
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port="5432")
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cursor = connection.cursor()
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sql_query = "select * from actor"
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cursor.execute(sql_query)
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print("Selecting rows from mobile table using cursor.fetchall")
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actor_records = cursor.fetchall()
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print("Print each row and it's columns values")
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for row in actor_records:
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print("Id = ", row[0], )
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print("Model = ", row[1])
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print("Price = ", row[2], "\n")
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except (Exception, psycopg2.Error) as error:
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print("Error while fetching data from PostgreSQL", error)
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finally:
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if connection:
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cursor.close()
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connection.close()
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print("PostgreSQL connection is closed")

‎generic/exception-handling.py

Lines changed: 19 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,19 @@
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import os
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import sys
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directory = "demodir_"
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symbols = "~!@#$%^*()_-+={}[]:>;',</?*-+"
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def createDir(dir):
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try:
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if any(char in symbols for char in directory):
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raise ValueError("The directory name contains special characters. Please use only alphabets")
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os.mkdir(dir)
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except ValueError as ve:
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print(ve)
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except OSError:
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print("Folder already Exist. Plese delte it or try with a differnt name")
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createDir(directory)
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finally:
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with open("directory.log", "a") as myfile:
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myfile.write("directory creation attempted at %s" % str(datetime.datetime.now()))

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