How to Create and Configure a VPC in Thalassa Cloud

This guide walks you through creating and configuring a Virtual Private Cloud (VPC) in Thalassa Cloud with internet access. You’ll learn how to set up a secure network environment for your applications.

A Virtual Private Cloud (VPC) provides a logically isolated network where you can launch and manage your resources securely. This guide covers:

1. Creating a VPC
2. Setting up subnets
3. Configuring internet access
4. Managing routing

Creating a VPC

1. Navigate to the VPC section in the Thalassa Cloud Console
2. Click “Create VPC”
3. Configure the VPC:
   • Name: Choose a descriptive name
   • CIDR Block: Select a CIDR range (e.g., 10.0.0.0/16)
   • Region: Choose your preferred region
   • Enable Internet Access: Check this option for public internet access

Note: Choose a CIDR block that’s large enough for your future subnet needs. A /16 block gives you 65,536 IP addresses.

Configuring Subnets

Create subnets based on your application’s needs:

1. Create a subnet in your VPC
2. Choose a CIDR block (e.g., 10.0.1.0/24)
3. Name your subnet based on its intended role (e.g., “web”, “app”, “database”)
4. Repeat for additional subnets as needed

Note: Subnet names are used to indicate their role in your architecture. For example, you might name subnets “web”, “app”, or “database” to reflect their purpose.

Setting Up Internet Access

For Subnets

1. Create a NAT Gateway:

   • Select a subnet for the NAT Gateway
   • Allocate a public IP
   • Create the NAT Gateway

2. Configure routing:

   • Go to the route table for your subnet
   • Add a route: 0.0.0.0/0 → NAT Gateway
   • This allows outbound internet access while keeping resources private

Best Practices

1. Network Planning

   • Use separate subnets for different tiers (web, app, database)
   • Plan CIDR ranges to avoid overlap
   • Consider future growth when choosing CIDR blocks

2. Security

   • Use security groups to control traffic
   • Regularly review and update security rules
   • Implement least privilege access

3. Cost Optimization

   • NAT Gateways incur costs, so plan their placement
   • Consider using multiple NAT Gateways for additional high availability
   • Monitor network traffic and costs

Example Architecture

VPC (10.0.0.0/16)
├── Web Subnet (10.0.1.0/24)
│   ├── NAT Gateway
│   └── Load Balancers
└── App Subnet (10.0.2.0/24)
    ├── Application Servers
    └── Databases

Next Steps

• Learn about Security Groups
• Configure Load Balancers
• Learn about Kubernetes

Troubleshooting

Common issues and solutions:

1. Internet Access Issues

   • Verify NAT Gateway is running
   • Check route table configurations
   • Ensure security groups allow required traffic

2. Subnet Connectivity

   • Confirm CIDR ranges don’t overlap
   • Verify route table associations
   • Check security group rules

3. NAT Gateway Problems

   • Ensure public IP is allocated
   • Verify NAT Gateway is in the correct subnet
   • Check route table configurations

For additional help, contact Thalassa Cloud support.