Day 40 : AWS EC2 Automation

Launch template in AWS EC2 :

A launch template in AWS EC2 is a template that defines the configuration settings for EC2 instances, allowing you to launch instances with consistent settings. It's similar to a launch configuration but offers the advantage of versioning, enabling you to create and manage multiple versions of the template. Launch templates are used when creating Auto Scaling groups, launching individual instances, and configuring EC2 instances for various purposes like disaster recovery or test instances.

Key Features and Benefits of Launch Templates:

1. Consistent Configuration:

   Launch templates ensure that all instances launched from them have the same base configuration, reducing the chance of inconsistencies.

2. Versioning:

   You can create multiple versions of a launch template, allowing you to experiment with different configurations without modifying the main template.

3. Reusability:

   Launch templates can be used across various AWS services like Auto Scaling groups, individual instance launches, and AWS Application Migration Service.

4. Simplified Management:

   Launch templates provide a streamlined way to manage instance configurations, especially when launching multiple instances or creating Auto Scaling groups.

5. Reduced Overhead:

   By using templates, you can reduce the manual effort and time required to configure instances.

6. Easy to Migrate:

   Launch templates allow you to easily migrate your existing launch configurations to a more flexible template-based approach.

Instance Types:

Amazon EC2 has a large number of instance types that are optimized for different uses. The different combinations of CPU, memory, storage and networking capacity in instance types give you the freedom to choose the right mix of resources for your apps. Each instance type comes with one or more instance sizes, so you can adjust your resources to meet the needs of the workload you want to run.

Types of ec2 instances : https://aws.amazon.com/ec2/instance-types/

AMI:

An Amazon Machine Image (AMI) is an image that AWS supports and keeps up to date. It contains the information needed to start an instance. When you launch an instance, you must choose an AMI. When you need multiple instances with the same configuration, you can launch them from a single AMI.

Task1:

• Create a launch template with Amazon Linux 2 AMI and t2.micro instance type with Jenkins and Docker setup (You can use the Day 39 User data script for installing the required tools.

• Create 3 Instances using Launch Template, there must be an option that shows number of instances to be launched ,can you find it? :)

• You can go one step ahead and create an auto-scaling group, sounds tough?