Terraform: subnet id

Terraform subnet_id argument used in:

• Terraform resource: aws_instance
• Terraform module: ec2-instance

• aws ec2 describe-subnets --output json | grep SubnetId
• aws ec2 describe-instances | grep -i SubnetId

Examples

• subnet_id = "subnet-0a72be05b421abcde"
• subnet_id = element(data.aws_subnets.all_private.ids, 0)

Errors

• terraform plan

│ Error: Error in function call
│
│   on ../path_to_your/plan.tf line 7, in resource "aws_instance" "this":
│    7:   subnet_id = element(var.subnet_ids,count.index)
│     ├────────────────
│     │ count.index is 0
│     │ var.subnet_ids is empty list of string
│
│ Call to function "element" failed: cannot use element function with an empty list.

• InvalidSubnetID

Related

• aws_subnet_ids
• aws_subnet
• Terraform: VPCIdNotSpecified

tf show | grep subnet_id
tf show | egrep "subnet_id|connectivity_type"

• Terraform module: ec2-instance

See also

• Terraform AWS: aws_instance: ami, availability_zone, instance_type, key_name, aws_key_pair, monitoring, associate_public_ip_address, tenancy, subnet_id, user_data, root_block_device, iam_instance_profile, vpc_security_group_ids, root_block_device