Python3 script to create AWS VM using cli, the code reads the input from a file called “input.txt” with a different format, where each line contains the name of the value and the actual value separated by a tab:

import boto3

# Set your AWS profile and region
AWS_PROFILE = "your-profile"
AWS_REGION = "your-region"

# Read input from file
with open("input.txt", "r") as file:
    lines = file.readlines()

# Extract instance details from input
INSTANCE_TYPE = ""
IMAGE_ID = ""
SUBNET_ID = ""
SECURITY_GROUP_ID = ""
KEY_NAME = ""
TAG_NAME = ""
TAG_ENVIRONMENT = ""
TAG_OWNER = ""

# Parse input lines
for line in lines:
    name, value = line.strip().split("\t")
    if name == "INSTANCE_TYPE":
        INSTANCE_TYPE = value
    elif name == "IMAGE_ID":
        IMAGE_ID = value
    elif name == "SUBNET_ID":
        SUBNET_ID = value
    elif name == "SECURITY_GROUP_ID":
        SECURITY_GROUP_ID = value
    elif name == "KEY_NAME":
        KEY_NAME = value
    elif name == "TAG_NAME":
        TAG_NAME = value
    elif name == "TAG_ENVIRONMENT":
        TAG_ENVIRONMENT = value
    elif name == "TAG_OWNER":
        TAG_OWNER = value

# Create an EC2 resource using the specified profile and region
session = boto3.Session(profile_name=AWS_PROFILE, region_name=AWS_REGION)
ec2_resource = session.resource('ec2')

# Launch the EC2 instance
instance = ec2_resource.create_instances(
    ImageId=IMAGE_ID,
    InstanceType=INSTANCE_TYPE,
    SubnetId=SUBNET_ID,
    SecurityGroupIds=[SECURITY_GROUP_ID],
    KeyName=KEY_NAME,
    TagSpecifications=[
        {
            'ResourceType': 'instance',
            'Tags': [
                {'Key': 'Name', 'Value': TAG_NAME},
                {'Key': 'Environment', 'Value': TAG_ENVIRONMENT},
                {'Key': 'Owner', 'Value': TAG_OWNER}
            ]
        }
    ]
)[0]

# Wait for the instance to be in the "running" state
instance.wait_until_running()

print(f"Instance {instance.id} launched successfully!")

the “input.txt” file, contains the name of the value and the actual value separated by a tab (\t), each line is parsed and the actual value to the corresponding variable based on the name is assigned.

an example of “input.txt” file structure is as below:

INSTANCE_TYPE    t2.micro
IMAGE_ID         ami-12345678
SUBNET_ID        subnet-12345678
SECURITY_GROUP_ID    sg-12345678
KEY_NAME         your-key-pair-name
TAG_NAME         MyInstance
TAG_ENVIRONMENT    Production
TAG_OWNER        John Doe