DevOps Classroom notes 14/Apr/2026

Adding multiple resources

• Terraform count meta argument helps in creating multiple number of resources Refer Here
• syntax

resource '...' '...' {
    count = 5
    ....
}

• When you are accessing resources we need to use index
• Example

resource 'aws_subnet' 'subnets {
    count = 3
}

# aws_subnets[0] => 1 subnet
# aws_subnets[2] => 3 subnet

• Refer Here for the changes to add multiple subnets
• Aws has a concept of public and private subnets
  

Lets create private and public subnets

• To make subnet public:
  • It should be associated with a route table which has route to internet gateway
• To make subnet private:
  • It should be associated with a route table which does not have a route to internet gateway
• Exercise:
  • Makes changes in the current terrform template which should support
    • private subnets
    • public subnets
  • You need to create internet gateway
  • you need to create two route tables
  • For public route table create a route to internet gateway
  • Associate public subets with public route table
  • Associate private subnets with private route table.