Terraform: Inappropriate value for attribute "ingress" while creating SG

Question

I'm creating a Security group using terraform, and when I'm running terraform plan. It is giving me an error like some fields are required, and all those fields are optional.

Terraform Version: v1.0.5

AWS Provider version: v3.57.0

main.tf

resource "aws_security_group" "sg_oregon" {
  name        = "tf-sg"
  description = "Allow web traffics"
  vpc_id      = aws_vpc.vpc_terraform.id

  ingress = [
    {
      description      = "HTTP"
      from_port        = 80
      to_port          = 80
      protocol         = "tcp"
      cidr_blocks      = ["0.0.0.0/0"]  
    },
  {
      description      = "HTTPS"
      from_port        = 443
      to_port          = 443
      protocol         = "tcp"
      cidr_blocks      = ["0.0.0.0/0"]  
  },

    {
      description      = "SSH"
      from_port        = 22
      to_port          = 22
      protocol         = "tcp"
      cidr_blocks      = ["0.0.0.0/0"]  
    }
  ]


  egress = [
    {
      description      = "for all outgoing traffics"
      from_port        = 0
      to_port          = 0
      protocol         = "-1"
      cidr_blocks      = ["0.0.0.0/0"]
      ipv6_cidr_blocks = ["::/0"]
      
    }
  ]

  tags = {
    Name = "sg-for-subnet"
  }
}

error in console

│ Inappropriate value for attribute "ingress": element 0: attributes "ipv6_cidr_blocks", "prefix_list_ids", "security_groups", and "self" are required.

│ Inappropriate value for attribute "egress": element 0: attributes "prefix_list_ids", "security_groups", and "self" are required.

I'm following this doc: https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/security_group

Any help would be appreciated.

Answer 1

Since you are using Attributes as Blocks you have to provide values for all options:

resource "aws_security_group" "sg_oregon" {
  name        = "tf-sg"
  description = "Allow web traffics"
  vpc_id      = aws_vpc.vpc_terraform.id

  ingress = [
    {
      description      = "HTTP"
      from_port        = 80
      to_port          = 80
      protocol         = "tcp"
      cidr_blocks      = ["0.0.0.0/0"]  
      ipv6_cidr_blocks = []
      prefix_list_ids = []
      security_groups = []
      self = false
    },
  {
      description      = "HTTPS"
      from_port        = 443
      to_port          = 443
      protocol         = "tcp"
      cidr_blocks      = ["0.0.0.0/0"]  
      ipv6_cidr_blocks = []
      prefix_list_ids = []
      security_groups = []
      self = false      
  },

    {
      description      = "SSH"
      from_port        = 22
      to_port          = 22
      protocol         = "tcp"
      cidr_blocks      = ["0.0.0.0/0"]  
      ipv6_cidr_blocks = []
      prefix_list_ids = []
      security_groups = []
      self = false      
    }
  ]


  egress = [
    {
      description      = "for all outgoing traffics"
      from_port        = 0
      to_port          = 0
      protocol         = "-1"
      cidr_blocks      = ["0.0.0.0/0"]
      ipv6_cidr_blocks = ["::/0"]
      prefix_list_ids = []
      security_groups = []
      self = false
    }
  ]

  tags = {
    Name = "sg-for-subnet"
  }
}