Terraform append to list

The HCP Terraform Module Registry implements the Registry standard API for consuming/exposing private modules. Refer to the Module Registry HTTP API to perform the following: For publicly curated modules, the HCP Terraform Module Registry acts as a proxy to the Terraform Registry for the following: The HCP Terraform Module Registry endpoints ...17. Subsets of lists as you are looking for are often referred to as slices. Terraform has a built-in function for this, called slice, which is availble since version 0.8.8. You are looking for. slice(<put_reference_to_list_here, 0, 3) slice(<put_reference_to_list_here, 3, 5) From the documentation: slice (list, from, to) - Returns the portion ...In Terraform, you can use list and map variables to define dynamic sets of values within your configuration. These variables provide… 2 min read · Jan 26, 2024Causes of pain on the left side of the stomach include cancer, diverticulitis, kidney infection and a ruptured spleen, according to Mayo Clinic. Kidney stones, shingles, gastritis,...Use the Terraform Command Line Interface (CLI) to manage infrastructure, and interact with Terraform state, providers, configuration files, and Terraform Cloud. Create an EC2 instance and security group, and move a resource to another state file. Remove, replace, and re-import resources to manage state and reconcile drift in your infrastructure.resource_id = each.key. resource_target = each.value.target. } This uses a for expression to project the list of objects into a map of objects, using the id attribute as the key for each element. Terraform would then understand this as intent for the following two instances to exist:It works as follows. If each.key is equal to "0" (i.e., first instance being created) then its tag will be "PrimaryEC2". All remaining instances will be tagged: "EC2Worker1", "EC2Worker2", "EC2Worker3" and so on for as many subnets there are. Hi @Marcin, if you can elaborate on this syntax it would be helpful.Another note: looking at the documentation for the aws_instance Data Source (and your example above), you don't need the .*. portion when accessing the private_ip attribute, since you aren't using a meta-argument such as count or for_each to make data.aws_instance.nginx a list/set, and the aws_instance Data Source only returns one instance.10. Review.The combined state is now in place and should be ready with a combined configuration. Use terraform state list to view the state list information from the state in the backend, which was just pushed. Run terraform plan to see the results and ensure that they are as expected. If the configuration and the states were combined, this should …Teams API. The Teams API is used to create, edit, and destroy teams as well as manage a team's organization-level permissions. The Team Membership API is used to add or remove users from a team. Use the Team Access API to associate a team with privileges on an individual workspace.2 Jul 2020 ... I just wanted to add the general observation here that whenever you read data from a file or similar location that stores “sequence of bytes ...Create a Terraform file ( main.tf) and input the following: locals { . list_one = ["A", "B", "C"] . list_two = ["D", "E", "F"] . combined_list = concat(locals.list_one, locals.list_two) } . output "combined_list" { value = locals.combined_list. } This code defines two local lists and then uses the Terraform concat function to merge them.I would say rather concatenating at resource level use the locals first define a variable in locals and then you can utilize it at resource level. Locals declaration. rds_instance_name = "${var.env}-${var.rds_name}" Resource Level declaration. count = var.db_create ? 1 : 0.Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brandAre you looking for a new place to rent? Zumper is a rental listing platform that makes it easy to find the perfect rental for you. In this article, we’ll give you an overview of Z...Terraform append to list is a built-in function that allows you to add new elements to a list of values. This can be useful for adding new tags to a resource, or for adding new values to a configuration file.Instead of a list, the special keyword all may be used to instruct Terraform to ignore all attributes, which means that Terraform can create and destroy the remote object but will never propose updates to it.. Only attributes defined by the resource type can be ignored. ignore_changes cannot be applied to itself or to any other meta-arguments.. replace_triggered_by (list of resource or ...Yes, you can filter out users without the appId.For example, by creating helper local variable users_with_appId:. locals { users_with_appId = [ for user in var.users: user if user.appId != null ] }values Function. values takes a map and returns a list containing the values of the elements in that map. The values are returned in lexicographical order by their corresponding keys , so the values will be returned in the same order as their keys would be returned from keys.terraform import aws_instance.new_ec2_instance i-abcd1234 #import EC2 instance with id i-abcd1234 into the Terraform resource named "new_ec2_instance" of type "aws_instance"; terraform import 'aws_instance.new_ec2_instance[0]' i-abcd1234 #same as above, imports a real-world resource into an instance of Terraform resource; terraform output #list all outputs as stated in codeTo fix this manually I would add the necessary tags to "vol-0ccc9938279c3a256" Now, I am able to fix this issue from the AWS console by manually …4. This: for_each = var.sql_mi_defaults. tells Terraform to take whatever the collection is in var.sql_mi_defaults and create one azurerm_resource_group_template_deployment resource for each item in that collection. It exposes the each.key and each.value properties within the scope of the resource block automatically.Nov 19, 2020 · Stack Overflow Jobs powered by Indeed: A job site that puts thousands of tech jobs at your fingertips (U.S. only).Search jobsTerraform, a popular open-source tool created by HashiCorp, enables users to define and provision infrastructure using a high-level configuration language. Lists, or arrays, are fundamental data types in Terraform that store ordered sequences of values. Concatenating lists refers to the process of merging two or more lists into a single list.Aug 6, 2019 · value = {. for inst in data.oci_core_instances.test_instances.instances : inst.display_name => inst.state. } } If you really do need that list of strings with => inside for some reason, you can adapt the above to get it, like this: output "format_instances_state_element_single" {. value = [. for inst in data.oci_core_instances.test_instances ...I have a following example of Terraform resources where I fetch values from secrets manager and pass them to the Lambda function. The question is how can I add extra values to an object before passing it to environment variable without replicating the values?If you add a new rule to your list with key = "new_example" in between the allow_ssh rule and the allow_tcp:8000-8010 rule then because Terraform is tracking these instances by their keys rather than their indices Terraform will plan to make the following changes: Create a new instance aws_network_rule.all["new_example"] with rule_number = 2.Jul 19, 2022 · Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand<div class="navbar header-navbar"> <div class="container"> <div class="navbar-brand"> <a href="/" id="ember34" class="navbar-brand-link active ember-view"> <span id ...terraform replies with the error: * aws_launch_configuration.main: security_groups: should be a list. So i tried the new list object just with the one item. security_groups = "${list(aws_security_group.instance.id)}" and it errors with * aws_launch_configuration.main: security_groups: should be a listT Anna. 944 6 21 54. 1. Unfortunately most languages' map/hash/dict map function will merge one level deep, and not recursively. You would have to code a custom lambda for this. I threw about ten minutes at it, and I think TF's current DSL is not robust enough to allow coding a deep/recursive map merge.Mar 23, 2023 · new_list = [for item in list : {...item, newProp = XYZ}] I assumed, javascript object deconstructor works in tf files, but does it? I don't want to list all the existing properties of item above.In terraform, how do I add an if condition to a for loop? Hot Network Questions Where did Lagrange prove the Four Squares Theorem? What does Gain mean when LTSpice plots Gain vs Frequency in AC analysis? Troubleshooting why my hammock fell Can I use "Britons" in data reports? ...How to append to a list in Terraform? 27. adding extra element to a list in terraform if condition is met. 0. Terraform - Append a string to an object in a for_each. 1.<div class="navbar header-navbar"> <div class="container"> <div class="navbar-brand"> <a href="/" id="ember34" class="navbar-brand-link active ember-view"> <span id ...Oct 21, 2021 · Therefore you need to give Terraform more information about how to produce the resulting list. If you just need to get a list of all of the ARNs and discard all the map keys then the values function can be a concise way to do that:Your local TV guide is an ideal way to make sure you don’t miss your favorite shows. You find out what is on TV guide by scrolling through the listings on your television or even b...In terraform, how do I add an if condition to a for loop? Hot Network Questions Where did Lagrange prove the Four Squares Theorem? What does Gain mean when LTSpice plots Gain vs Frequency in AC analysis? Troubleshooting why my hammock fell Can I use "Britons" in data reports? ...Console. Copy. aztfexport [command] --append <scope>. When the --append flag is specified, Azure Export for Terraform verifies if there's a pre-existing provider or terraform block in any of the files in the current directory. If not, the tool creates a file for each block and then proceeds with exporting. If the output directory has a state ...terraform replies with the error: * aws_launch_configuration.main: security_groups: should be a list. So i tried the new list object just with the one item. security_groups = "${list(aws_security_group.instance.id)}" and it errors with * aws_launch_configuration.main: security_groups: should be a listBasic Syntax. count is a meta-argument defined by the Terraform language. It can be used with modules and with every resource type. The count meta-argument accepts a whole number, and creates that many instances of the resource or module. Each instance has a distinct infrastructure object associated with it, and each is separately created ...When it comes to catering, having a price list is essential for ensuring that you are getting the most out of your menu. A price list will help you to keep track of what items are ...I created a script that fetches a different ID, "<ID_2>", and I'd like to append it to the existing group configuration on Terraform. Does anyone know how can I edit "groups.tf" in order to append the ID to the list? End goal will look like this:Iterating through a list while already using for_each (Terraform 0.12) 2 Terraform For expression to create a single map to use in for_each, using one tuple and two list of stringsSep 15, 2020 · where the server-type-b security group is only included the security_groups list if var.include_server_type_b is truthy. Other things learnt about Terraform: Sensitive Terraform Cloud variables are included in Sentinel mocks; AWS ASGs have an ‘instance refresh’ feature; Renaming a Terraform module is dangerous1 Answer. Sorted by: 39. Have you tried formatlist ()? For example: my_list_var = ["a", "b", "c"] my_new_list = formatlist("%s-foo", var.mylist) my_new_list …To save space, credentials are typically listed as abbreviations on a business card. Generally, the abbreviations are appended to the end of a person’s name, separated by commas, i...Using Terraform Append to add items to your list is a simple and efficient way to manage your Terraform configuration. By following the steps outlined in this guide, you can easily add new items to your list attributes and customize your infrastructure as code configuration.Usage. Usage: terraform import [options] ADDRESS ID. Import will find the existing resource from ID and import it into your Terraform state at the given ADDRESS. ADDRESS must be a valid resource address . Because any resource address is valid, the import command can import resources into modules as well as directly into the root of your state.Fat stranding refers to expanded attenuation of fat in the abdomen. The fat in this area includes omentum, mesentery, retroperitoneum or subcutaneous fat. Appendicitis is a common ...Local Values. Hands-on: Try the Simplify Terraform Configuration with Locals tutorial. A local value assigns a name to an expression , so you can use the name multiple times within a module instead of repeating the expression. If you're familiar with traditional programming languages, it can be useful to compare Terraform modules to function ...terraform replies with the error: * aws_launch_configuration.main: security_groups: should be a list. So i tried the new list object just with the one item. security_groups = "${list(aws_security_group.instance.id)}" and it errors with * aws_launch_configuration.main: security_groups: should be a listvalue = {. for inst in data.oci_core_instances.test_instances.instances : inst.display_name => inst.state. } } If you really do need that list of strings with => inside for some reason, you can adapt the above to get it, like this: output "format_instances_state_element_single" {. value = [. for inst in data.oci_core_instances.test_instances ...I've been trying to find a way to make my terraform files a bit slicker, I have to create around 15 google secret resources, and their respective secret versions, for our production and staging environments. I've been playing with using for_each to see if I can achieve this without scrolling through a very long .tf file. However, as part of the ...The syntax for utilizing for_each in Terraform is as follows: for_each = <COLLECTION>. # Resource configuration here. Within the resource configuration block, HashiCorp Terraform iterates over the collection provided to for_each, accessing each item via the each keyword, which is comprised of key-value pairs.Terraform append item in a map. 0. Terraform construct a list from map. Hot Network Questions Can I Date This Woman? Which duplo digit is 6 or 9? ...let num = start while num < limit: (or, for negative step, num > limit) append num to the sequence num = num + step return the sequence. Because the sequence is created as a physical list in memory, Terraform imposes an artificial limit of 1024 numbers in the resulting sequence in order to avoid unbounded memory usage if, for example, a very ...The additional brackets turn the list result of concat into a list of lists, which is not what you want here. I have also converted aws_rds_cluster_instance.cluster_instances.*.arn to aws_rds_cluster_instance.cluster_instances[*].arn since [legacy (attribute-only) splat expressions are deprecated][1].To be able to conditionally append objects (or strings) to a list in terraform we must put it in another way: How do we dynamically generate a list of objects? The answer is using we can use the concat () function. result = concat(["A"], ["B"]) The concat () function will merge any set of lists. The trick here is to conditionally merge empty ...Stack Overflow Jobs powered by Indeed: A job site that puts thousands of tech jobs at your fingertips (U.S. only).Search jobsT Anna. 944 6 21 54. 1. Unfortunately most languages' map/hash/dict map function will merge one level deep, and not recursively. You would have to code a custom lambda for this. I threw about ten minutes at it, and I think TF's current DSL is not robust enough to allow coding a deep/recursive map merge.A dynamic block acts much like a for expression, but produces nested blocks instead of a complex typed value. It iterates over a given complex value, and generates a nested block for each element of that complex value. The label of the dynamic block ( "setting" in the example above) specifies what kind of nested block to generate.We use cookies and other similar technology to collect data to improve your experience on our site, as described in our Privacy Policy and Cookie Policy.In my terraform code I'd like to merge the following list of maps to one map of maps. The initial list of map looks as follows. Is there a way to do this? If there is not, is it possible to use the original list of maps in a for_each somehow? It only accepts set of strings or maps as far as I know. I tried restructuring it, but no luck.This function is quite flexible and allows you to concatenate a list of strings using a separator. To use it in this case, you can convert the string parts you want to concatenate into a list and then use join with a dot separator. Here’s how you can do it: data "null_data_source" "api_gw_url" {. inputs = {.Ok, got your point @cregkly.. So to be clear: In an AWS account, we have several cache policies for CloudFront distributions. When developers want to create CDN they should provide some information for ordered_cache_behavior.One field is calling cache_policy_id and this id is being generated by the AWS per policy.. We have several AWS accounts and in all of them I've created the same ...The monitor resource requires four fields, as seen above: name, type, message, and query.If you've ever created a monitor via Datadog's API, this won't be news to you.Terraform resource types always follow the pattern "<provider_name>_<resource>".In this case, the type is "datadog_monitor".The resource name is up to us, and we've chosen "cpumonitor".I followed this link to generate code above Terraform: how to iterate over key-value pairs of map input via json file Everything is good except for the index key. When I do terraform plan this is the sample output: An execution plan has been generated and is shown below.Nov 19, 2020 · Stack Overflow Jobs powered by Indeed: A job site that puts thousands of tech jobs at your fingertips (U.S. only).Search jobsI don't need a resource function to create users because users are already created by another team. We just need to create the groups and add the members into it. I am able to add the user to group by creating a tfvars file with members email address. terraform.tfvars. dev-team = [ "[email protected]", "[email protected]" ] groups.tfTerraform will figure out the dependencies and run the null_resource before generating the formatted_list and cli_parameter variables. - rclement. Feb 12, 2019 at 15:30. Add a comment | 1 One of the guys at work came up with this,The goal is to have Terraform to go through the list of resource_arns and add /* to the end. However, I'm currently getting the error, "invalid template interpolation value". If I have resources = each.value.resource_arns, then Terraform is able to create the resource, but it would just be without /*, which is not desired.I see in terraform console that is the expected output. However, I would like to pass in the following variable email with all both values to the following json (on field "toList") At the end I would like to have something like: "toList": " [ "email_address_2@com", "email_address_2@com", ], Hi, I have solved it with the ...Since Terraform’s concept of a set requires all of the elements to be of the same type, mixed-typed elements will be converted to the most general type (for example, if strings and numbers are supplied in the list together).Also note that sets cannot contain duplicate values, and any duplicate values supplied are coalesced. Sets are also unordered, so … 19 Dec 2022 ... ... append(domains, NewStringValue(*v),) } if v ... Sprintf("Unable to list ... Ru

Join/merge 2 json depending on a conditional in Terraform. I have 2 json files, in one I have policies and in the another one I have clusters with custom configurations, the thing is if a cluster has a policy_id key, it should be merged/join with the respective policy to get its default configurations, if not just returns the base cluster.Terraform, pre 0.12, only supports string, list and map types as an input variable so despite you providing an integer (or a float or a boolean) it will be cast to a string. Both Terraform and Go allow you to use the same padding for integers and strings though so you can just use the following to 0 pad the cluster_id:where the server-type-b security group is only included the security_groups list if var.include_server_type_b is truthy. Other things learnt about Terraform: Sensitive Terraform Cloud variables are included in Sentinel mocks; AWS ASGs have an 'instance refresh' feature; Renaming a Terraform module is dangerous2 Jul 2020 ... I just wanted to add the general observation here that whenever you read data from a file or similar location that stores “sequence of bytes ...Real estate house listings are a great way to find your dream home. Whether you’re a first-time homebuyer or an experienced investor, it’s important to know how to make the most of...Hands-on: Try the Terraform: Get Started tutorials. The command line interface to Terraform is the terraform command, which accepts a variety of subcommands such as terraform init or terraform plan.. We refer to the terraform command line tool as "Terraform CLI" elsewhere in the documentation. This terminology is often used to …We are going to follow the + method to add a new element to the list. In the last example, we have kept the list of strings inside the [ ] square brackets and merged it with an existing ansible list. Now we are going to do the same, this time the data we are going to add is a dictionary/map. Here is the playbook.To add an element to a Terraform map, you can use the `put` function. The `put` function takes two arguments: the name of the map and the value to be added. For example, the following code adds the value `”foo”` to the map `my_map`: resource “null_resource” “my_resource” {. provisioner “local-exec” {.Approach 1: Use distinct Function. The distinct function is a built-in Terraform function designed specifically for removing duplicate elements from a list. It’s straightforward and the most direct way to approach the …Yes, you can filter out users without the appId.For example, by creating helper local variable users_with_appId:. locals { users_with_appId = [ for user in var.users: user if user.appId != null ] }│ Error: Incorrect attribute value type │ │ on Modules\NACL\Main.tf line 28, in data "aws_subnet_ids" "example": │ 28: values = [element(var.nacl[*]["subnet_name"],count.index)] │ ├──────────────── │ │ count.index is 1 │ │ var.nacl is list of object with 5 elements │ │ Inappropriate value ...tolist Function. tolist converts its argument to a list value. Explicit type conversions are rarely necessary in Terraform because it will convert types automatically where …id - ID of the prefix list. owner_id - ID of the AWS account that owns this prefix list. tags_all - Map of tags assigned to the resource, including those inherited from the provider default_tags configuration block. version - Latest version of this prefix list. Import. In Terraform v1.5.0 and later, use an import block to import Prefix Lists ...2 min read | by Jordi Prats. To be able to conditionally append objects (or strings) to a list in terraform we must put it in another way: How do we dynamically …Terraform must store state about your managed infrastructure and configuration. This state is used by Terraform to map real world resources to your configuration, keep track of metadata, and to improve performance for large infrastructures. This state is stored by default in a local file named "terraform.tfstate", but we recommend storing it in ...Now that you have defined your variables, you can use them within your Terraform module or resource configurations. For example: module "example" { source = "./modules/example" nested_map = var.nested_map string_list = var.string_list } Inside your module, you can access the values using var.nested_map and var.string_list.Hands-on: Try the Terraform: Get Started tutorials. The command line interface to Terraform is the terraform command, which accepts a variety of subcommands such as terraform init or terraform plan.. We refer to the terraform command line tool as "Terraform CLI" elsewhere in the documentation. This terminology is often used to distinguish it from other components you might use in the Terraform ...The intent of the change in Terraform 0.12 was to avoid the need for redundant interpolation syntax and in particular to avoid the confusion implied by "interpolating" something that isn't a string in order to assign a variable's value to an argument, not to remove the interpolation syntax altogether. If your goal is to concatenate two strings together then interpolation syntax is still likely ...merge({ for l in local.lolom[0] : l.name => l.port }, { monitor = local.monitor }) It will go through the first list of maps as denoted by for l in local.lolom[0] Then it will set the name of the map equal to the port's value returning a map itself so now we have { https = 30443, http = 30080 } The merge() will then combine our map with the ...We can break this problem down into three steps: Enumerate the filenames matching your desired pattern. Read the content of each file into memory. Concatenate all of the file contents together. We can reformulate the above into three local value expressions, with each one building on the previous one: locals {.Use the Terraform Command Line Interface (CLI) to manage infrastructure, and interact with Terraform state, providers, configuration files, and Terraform Cloud. Create an EC2 instance and security group, and move a resource to another state file. Remove, replace, and re-import resources to manage state and reconcile drift in your infrastructure.Strings and Templates. String literals are the most complex kind of literal expression in Terraform, and also the most commonly used. Terraform supports both a quoted syntax and a "heredoc" syntax for strings. Both of these syntaxes support template sequences for interpolating values and manipulating text.Unlike input variables, locals are not set directly by users of your configuration. In this tutorial, you will use Terraform to deploy a web application on AWS. The supporting infrastructure includes a VPC, load balancer, and EC2 instances. You will then use local values to reduce repetition in the configuration, and then combine local values ...The "random" provider allows the use of randomness within Terraform configurations. This is a logical provider, which means that it works entirely within Terraform's logic, and doesn't interact with any other services. Unconstrained randomness within a Terraform configuration would not be very useful, since Terraform's goal is to converge on a ...When variables are declared in the root module of your configuration, they can be set in a number of ways: In an HCP Terraform workspace. Individually, with the -var command line option. In variable definitions ( .tfvars) files, either specified on the command line or automatically loaded. As environment variables.1 Overview. 1.1 Understanding Lists in Terraform. 2 Adding Elements to a List. 2.1 Static List Addition Example. 2.2 Dynamic Addition using Concat Function. 3 …Local Values. Hands-on: Try the Simplify Terraform Configuration with Locals tutorial. A local value assigns a name to an expression , so you can use the name multiple times within a module instead of repeating the expression. If you're familiar with traditional programming languages, it can be useful to compare Terraform modules to function ...Provider Documentation. Each provider has its own documentation, describing its resource types and their arguments. The Terraform Registry includes documentation for a wide range of providers developed by HashiCorp, third-party vendors, and our Terraform community. Use the "Documentation" link in a provider's header to browse its documentation.References to Named Values. Hands-on: Try the Create Dynamic Expressions tutorial. Terraform makes several kinds of named values available. Each of these names is an expression that references the associated value. You can use them as standalone expressions, or combine them with other expressions to compute new values.Are you looking for a new place to rent? Whether you’re moving to a new city or just want to switch up your living situation, it’s important to know all the rental listings near yo...The file provisioner copies files or directories from the machine running Terraform to the newly created resource. The file provisioner supports both ssh and winrm type connections. Important: Use provisioners as a last resort. There are better alternatives for most situations. Refer to Declaring Provisioners for more details.10. Review.The combined state is now in place and should be ready with a combined configuration. Use terraform state list to view the state list information from the state in the backend, which was just pushed. Run terraform plan to see the results and ensure that they are as expected. If the configuration and the states were combined, this should …It's also possible that a newer version of the Terraform provider may have fixed this issue, so you may want to consider upgrading to the latest version if possible. Alternatively, you may be able to add route rules in a default route table in OCI using other tools or methods, such as the OCI CLI or the OCI console. ...This resource provides the Security List resource in Oracle Cloud Infrastructure Core service. Creates a new security list for the specified VCN. For more information about security lists, see Security Lists . For information on the number of rules you can have in a security list, see Service Limits. For the purposes of access control, you must ...toset Function. toset converts its argument to a set value. Explicit type conversions are rarely necessary in Terraform because it will convert types automatically where required. Use the explicit type conversion functions only to normalize types returned in module outputs. Pass a list value to toset to convert it to a set, which will remove ...Terraform - Append a string to an object in a for_each. 2. For_each loop with for expression based on value in map. 1. need to include value in terraform or use multiple loops to store variable. 4. The count value is not recognized in terraform. 2.The "random" provider allows the use of randomness within Terraform configurations. This is a logical provider, which means that it works entirely within Terraform's logic, and doesn't interact with any other services. Unconstrained randomness within a Terraform configuration would not be very useful, since Terraform's goal is to converge on a ...In my terraform code I'd like to merge the following list of maps to one map of maps. The initial list of map looks as follows. Is there a way to do this? If there is not, is it possible to use the original list of maps in a for_each somehow? It only accepts set of strings or maps as far as I know. I tried restructuring it, but no luck.You can't use interpolation in a tfvars file. Instead you could either join it directly in your Terraform like this: terraform.tfvars hosted_zone = "example.com" domain = "my"Working with Terraform tags. A few months back, HashiCorp released a new feature in Terraform provider version 3.38.0 where they introduced default tags. Tags have been a helpful feature while working with a cloud provider because it allows one to quickly and (depending on one's tagging strategy) uniquely identify a cloud resource. If you want to pass this into an input variable in your root module then the situation is quite differe