AWS Networking & VPC

VPC Fundamentals

Virtual Private Cloud - isolated network environment.

VPC Components

• Subnets: Network segments trong VPC
• Route Tables: Định hướng network traffic
• Internet Gateway: Kết nối ra internet
• NAT Gateway: Outbound internet cho private subnets

VPC Setup

Resources:
  MyVPC:
    Type: AWS::EC2::VPC
    Properties:
      CidrBlock: 10.0.0.0/16
      EnableDnsHostnames: true
  
  PublicSubnet:
    Type: AWS::EC2::Subnet
    Properties:
      VpcId: !Ref MyVPC
      CidrBlock: 10.0.1.0/24
      AvailabilityZone: us-east-1a

Load Balancing

Application Load Balancer

# Create ALB
aws elbv2 create-load-balancer \
    --name my-alb \
    --subnets subnet-123456 subnet-789012 \
    --security-groups sg-903004f8

Network Load Balancer

Cho high-performance, low-latency applications.

Route 53

DNS service với health checks và routing policies.