I'm new to terragrunt and trying to figure how to pass variables between modules. I'm following terragrunt documentation here yet no luck and fails with error:
apps tg run-all plan
INFO[0000] The stack at /Users/xxx/sri/aws/Infrastructure/apps will be processed in the following order for command plan:
Group 1
- Module /Users/xxx/sri/aws/Infrastructure/apps/networks-vpc
- Module /Users/xxx/sri/aws/Infrastructure/apps/sri-s3-bucket
Group 2
- Module /Users/xxx/sri/aws/Infrastructure/apps/ec2-amz-lnx
No changes. Your infrastructure matches the configuration.
Terraform has compared your real infrastructure against your configuration
and found no differences, so no changes are needed.
module.vpc.aws_vpc.vpc: Refreshing state... [id=vpc-xxx]
module.vpc.aws_internet_gateway.igw: Refreshing state... [id=igw-xxx]
module.vpc.aws_subnet.public_subnet_a: Refreshing state... [id=subnet-xxx]
module.vpc.aws_route_table.private_b: Refreshing state... [id=rtb-xxx]
module.vpc.aws_route_table.public_b: Refreshing state... [id=rtb-xxx]
module.vpc.aws_subnet.private_subnet_b: Refreshing state... [id=subnet-xxx]
module.vpc.aws_route_table.public_a: Refreshing state... [id=rtb-xxx]
module.vpc.aws_subnet.public_subnet_b: Refreshing state... [id=subnet-xxx]
module.vpc.aws_route_table.private_a: Refreshing state... [id=rtb-xxx]
module.vpc.aws_subnet.private_subnet_a: Refreshing state... [id=subnet-xxx]
module.vpc.aws_security_group.sri_sg1: Refreshing state... [id=sg-xxx]
module.vpc.aws_route.r_a0: Refreshing state... [id=r-rtb-xxx]
module.vpc.aws_route.r_b0: Refreshing state... [id=r-rtb-xxx]
module.vpc.aws_security_group_rule.sri_sg1_ingress_rule1: Refreshing state... [id=sgrule-xxx]
module.vpc.aws_security_group_rule.sri_sg1_egress_rule1: Refreshing state... [id=sgrule-xxx]
module.vpc.aws_security_group_rule.sri_sg1_ingress_rule3: Refreshing state... [id=sgrule-xxx]
module.vpc.aws_security_group_rule.sri_sg1_ingress_rule2: Refreshing state... [id=sgrule-xxx]
module.vpc.aws_route_table_association.public_b: Refreshing state... [id=rtbassoc-xxx]
module.vpc.aws_route_table_association.private_a: Refreshing state... [id=rtbassoc-xxx]
module.vpc.aws_route_table_association.public_a: Refreshing state... [id=rtbassoc-xxx]
module.vpc.aws_route_table_association.private_b: Refreshing state... [id=rtbassoc-xxx]
No changes. Your infrastructure matches the configuration.
Terraform has compared your real infrastructure against your configuration
and found no differences, so no changes are needed.
ERRO[0008] Module /Users/xxx/sri/aws/Infrastructure/apps/ec2-amz-lnx has finished with an error: /Users/xxx/sri/aws/Infrastructure/apps/networks-vpc/terragrunt.hcl is a dependency of /Users/xxx/sri/aws/Infrastructure/apps/ec2-amz-lnx/terragrunt.hcl but detected no outputs. Either the target module has not been applied yet, or the module has no outputs. If this is expected, set the skip_outputs flag to true on the dependency block. prefix=[/Users/xxx/sri/aws/Infrastructure/apps/ec2-amz-lnx]
ERRO[0008] 1 error occurred:
* /Users/xxx/sri/aws/Infrastructure/apps/networks-vpc/terragrunt.hcl is a dependency of /Users/xxx/sri/aws/Infrastructure/apps/ec2-amz-lnx/terragrunt.hcl but detected no outputs. Either the target module has not been applied yet, or the module has no outputs. If this is expected, set the skip_outputs flag to true on the dependency block.
ERRO[0008] Unable to determine underlying exit code, so Terragrunt will exit with error code 1
My Folder structure:
aws tree
.
├── Infrastructure
│ ├── README.md
│ ├── apps
│ │ ├── ec2-amz-lnx
│ │ │ ├── graph.svg
│ │ │ ├── main.tf
│ │ │ ├── outputs.tf
│ │ │ ├── providers.tf
│ │ │ ├── terragrunt.hcl
│ │ │ ├── variables.tf
│ │ │ └── versions.tf
│ │ ├── graph.svg
│ │ ├── networks-vpc
│ │ │ ├── main.tf
│ │ │ ├── outputs.tf
│ │ │ ├── providers.tf
│ │ │ ├── terragrunt.hcl
│ │ │ ├── variables.tf
│ │ │ └── versions.tf
│ │ ├── sri-s3-bucket
│ │ │ ├── main.tf
│ │ │ ├── providers.tf
│ │ │ ├── terragrunt.hcl
│ │ │ ├── variables.tf
│ │ │ ├── versions.tf
│ │ │ └── website
│ │ │ └── index.html
│ │ └── website-s3
│ ├── binaries
│ │ ├── darwin
│ │ │ ├── terraform
│ │ │ └── terragrunt
│ │ ├── linux
│ │ │ ├── terraform
│ │ │ └── terragrunt
│ │ └── windows
│ │ ├── terraform.exe
│ │ └── terragrunt.exe
│ ├── environments
│ │ ├── ap-southeast-2
│ │ │ ├── npe
│ │ │ │ ├── apps
│ │ │ │ │ ├── ec2-amz-lnx.tfvars
│ │ │ │ │ ├── networks-vpc.tfvars
│ │ │ │ │ └── s3.tfvars
│ │ │ │ └── environment.hcl
│ │ │ └── prod
│ │ └── us-east-2
│ ├── modules
│ │ ├── ec2
│ │ │ ├── data.tf
│ │ │ ├── files
│ │ │ │ └── user_data_lx_amazon.tpl
│ │ │ ├── iam.tf
│ │ │ ├── main.tf
│ │ │ ├── outputs.tf
│ │ │ └── variables.tf
│ │ ├── s3
│ │ │ ├── main.tf
│ │ │ ├── outputs.tf
│ │ │ └── variables.tf
│ │ └── vpc
│ │ ├── main.tf
│ │ ├── outputs.tf
│ │ └── variables.tf
│ └── terragrunt.hcl
├── test.jpg
So I have written terraform modules for vpc, ec2, s3 locally under module folder, that are used by apps(workspaces)and configs/tfvars for environment based on region and environment as shown above.
As you can see above the terragrunt has put networks-vpc in Group 1 and ec2-amz-lnx in Group 2. I've made sure I've declared outputs in VPC(as below)
Outputs:
SecurityGroupID = "sg-xxx"
private_subs = {
"private_subnet_a" = "subnet-xxx"
"private_subnet_b" = "subnet-xxx"
}
public_subs = "subnet-xxx"
vpc_id = "vpc-xxx"
In the ec2-amz-lnx folder, I've created terragrunt.hcl file with following:
include {
path = find_in_parent_folders()
expose = true
}
dependency "shared_infra" {
config_path = "../networks-vpc"
# mock_outputs = {
# public_subs = "subnet-xxx"
# }
}
dependencies {
paths = ["../networks-vpc"]
}
inputs = {
public_subs = dependency.shared_infra.outputs.public_subs
}
and In ec2-amz-lnx, I'm passing public_subs value like below:
module "ec2" {
source = "../../modules/ec2"
vpc_public_subnet_id = public_subs
instance_type_lx = var.instance_type_lx_value
security_group_ids = var.security_group_ids_value
ec2keypair_name = var.ec2keypair_name_value
instance_count = var.instance_count_value
}
