Terraform plan execution errors

Error: Missing required argument

│ Error: Missing required argument
│
│   with module.compute.aws_instance.this[0],
│   on ../path/to/your/terraformodule.tf  line 1, in resource "aws_instance" "this":
│    1: resource "aws_instance" "this" {
│
│ "launch_template": one of `ami,instance_type,launch_template` must be specified

Error: Error in function call

│ Error: Error in function call
│
│   on ../path/to/your/terraformodule.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.

• Solution: if your element if from type list make user provide values using proper format: [value1, value2]

Error: Invalid value for module argument

│ Error: Invalid value for module argument
│
│   on main.tf line 8, in module "yourModuleName":
│    8:   subnet_ids = var.subnet_id
│
│ The given value is not suitable for child module variable "subnet_ids" defined at
│ ../path/to/your/terraformodule.tf :79,1-22: list of string required.

• Solution: if your element if from type list make user provide values using proper format: [value1, value2]

Error: undeclared resource

 terraform plan
╷
│ Error: Reference to undeclared resource
│
│   on main.tf line 9, in resource "aws_instance" "example":
│    9:   ami               = data.aws_ami.windows.id
│
│ A data resource "aws_ami" "windows" has not been declared in the root module.

No configuration files

terraform plan

Error: No configuration files 

Plan requires configuration to be present. Planning without a configuration
would mark everything for destruction, which is normally not what is desired.
If you would like to destroy everything, run plan with the -destroy option.
Otherwise, create a Terraform configuration file (.tf file) and try again.

Related terms

• Terraform: Hello_world.tf
• GitLab Preview of summary of terraform plan in Merge Requests https://about.gitlab.com/releases/2020/05/22/gitlab-13-0-released/#review-summary-of-terraform-plan-in-merge-requests
• terraform validate
• terraform apply
• Error: Invalid multi-line string
• Error: Missing newline after argument
• Error: Invalid block definition
• Error: Argument or block definition required
• No changes. Infrastructure is up-to-date

See also

• terraform plan: [ -refresh-only | -lock=false | -target | -var-file | will be created | --help], Terraform plan errors, Terraform plan examples, Terraform plan execution errors, (known after apply)
• terraform [untaint | fmt | apply |show | state | init | plan | console | output | validate | destroy | debug | import | providers | get | graph | workspaces | resource | login | -var-file | state mv | state pull | state push | state replace-provider | state rm | force-unlock | env | tfe | --version | remote-exec | delete on termination | deprecated commands | terraform --help]
• Terraform, OpenTofu, Installation, Terraform AWS, Terraform GCP, Terraform commands, Terraform Cloud, Terraform Enterprise (TFE), HCL, HIL, meta-arguments, providers, modules, resource, provisioners, data sources, backends: remote backends, examples, configuration files, state files, variables, types, Terraform Registry, conditionals: depends_on, functions, Blocks, dynamic blocks, errors, Terragrunt, Terraformer, Terratest, Terraform certifications, Terraform map type, Terraform Associate, Terraform: list type, TF_VAR_, TF_LOG, Terraform provider versioning, Terraform Style Conventions, Required version, Terraform plugin, Terraform Named Values, tags, Changelog, tfsec, tflint, Operators, Expressions: for, splat, Debugging, Namespaces, Terraform Landing Zones, CDKTF, Atmos