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12. Template

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12. Template

Template

Prerequisites

1. Template

"aws-ec2-0"

Launch Template is a key component for managing EC2 instances at scale. It defines How EC2 instances should be launched

A Launch Template is:

  • A configuration blueprint for EC2
  • Used to launch instances consistently

👉 It contains all the settings required to launch an EC2 instance.

1

Launch Template → EC2 Instance

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Template
 ├── AMI (Ubuntu + Docker)
 ├── t3.micro
 ├── Security Group (22, 80)
 └── User-data script
      ↓
EC2 Instances (multiple)
Without Launch Template:
  • Manual configuration required
  • Risk of inconsistency
  • Difficult to scale
With Launch Template:
  • Repeatable deployments
  • Consistent environments
  • Easy scaling
  • Launch Templates support versions
  • Infrastructure consistency
Only AMI Without Template

👉 Network / Security / Setting issue.

2. Components of Template

  • AMI (image)
  • Instance type (CPU / memory)
  • Key pair
  • Security group
  • Subnet / network settings
  • Storage (EBS)
  • User data (startup script)

3. How to create Template

3-1. Search EC2

"aws-ec2-0"

3-2. Click Navigation pane → “Launch Templates”

"aws-temp0"

3-3. Click Button → “Create launch template”

"aws-temp1"

3-4. Set Environments (Hardware)

"aws-temp2" "aws-temp3"

3-5. Step 2. Set Environments (Security)

"aws-temp4"

  1. Subnet, AZ, Firewall is optional

3-6. Step 3. Set Environments (Storage)

"aws-temp5"

3-7. Launch Instance

"aws-temp6"

  • Components
    • Auto scaling
    • AMI
AWS, AWS - Fundamental
AWS AWS - Fundamental
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