Scenario – 1: Ntier application infra – AWS – cont
resource <Type> <LABEL> {
arg1 = value1
arg2 = valun2
..
argn = valuen
}
- Types in Hashicorp configuraion language
- string
x = '<value>'
- number
- boolean
- list
- set
- map
{ name='qt', age = 10 }
Creating vpc as desired state in terraform
- We have written the following block in a file
network.tf
# vpc
resource "aws_vpc" "base" {
cidr_block = "192.168.0.0/16"
enable_dns_hostnames = true
tags = {
Name = "from-tf"
Env = "Dev"
}
}
- Workflow
- Lets format terraform template
terraform fmt
- Lets validate terraform template
terraform validate
- Lets create infra
terraform apply
- To view the attributes
- resource:
<type>.<label> in console
Now lets create subnets
- Refer Here for subnet resource
- To define order of creation we have two options
- implicit dependency: see the example below
- explicit depenency: this is acheived by depends_on
resource "aws_subnet" "web" {
# implicit dependency
vpc_id = aws_vpc.base.id
availability_zone = "ap-south-1a"
cidr_block = "192.168.0.0/24"
tags = {
Name = "web"
Env = "Dev"
}
# explicit dependency
depends_on = [ aws_vpc.base ]
}
-
Refer Here for the changes done to create vpc with 3 subnets
-
Lets create internet gateway and two route tables Refer Here for changes
