terraform-aws-asg-tag-transform

Data-only module that transforms a tag map as used by most AWS resources into a list of tags as required by aws_autoscaling_group

Example Usage

Propagate All:

locals {
  tags = {
    owner = "Jane Doe"
    key2  = "value2"
  }
}

resource "aws_launch_configuration" "example" {
  name_prefix          = "example-"
  image_id             = "ami-xxxxxxxx"
  instance_type        = "t3.micro"
}

module "example_asg_tags" {
  source  = "rhythmictech/asg-tag-transform/aws"
  version = "1.0.0"
  tag_map = merge(
    local.tags,
    {
      Name = "example-asg"
    }
  )
}

resource "aws_autoscaling_group" "example" {
  name_prefix          = "example-"
  max_size             = 1
  min_size             = 1
  launch_configuration = aws_launch_configuration.example.name
  tags                 = module.example_asg_tags.tag_list
}

Mixed Propagation:

locals {
  tags = {
    owner = "Jane Doe"
    key2  = "value2"
  }
}

resource "aws_launch_configuration" "example" {
  name_prefix          = "example-"
  image_id             = "ami-xxxxxxxx"
  instance_type        = "t3.micro"
}

module "example_asg_tags_propagated" {
  source  = "rhythmictech/asg-tag-transform/aws"
  version = "1.0.0"
  tag_map = local.tags
}

module "example_asg_tags_not_propagated" {
  source  = "rhythmictech/asg-tag-transform/aws"
  version = "1.0.0"
  propagate_at_launch = false
  tag_map = {
    Name = "example-asg"
  }
}

resource "aws_autoscaling_group" "example" {
  name_prefix          = "example-"
  max_size             = 1
  min_size             = 1
  launch_configuration = aws_launch_configuration.example.name
  
  tags = concat(
    module.example_asg_tags_propagated.tag_list,
    module.example_asg_tags_not_propagated.tag_list
  )
}

Inputs

Name	Description	Type	Default	Required
tag_map	Map of tags in format used by most AWS resources ({key = "value"})	map(string)	none	yes
propagate_at_launch	Whether ASG tags should propagate to instances	bool	true	no

Outputs

Name	Description
tag_list	List of tag maps in format required by aws_autoscaling_group