The JSON you shared doesn't seem complete but assuming that the JSON file contains a top-level JSON object where Events is one of its properties then you could do that using something like the following: locals { raw_data = jsondecode (file ("$ {path.module}/example.json")) event_topics = local.raw_data.Events [*].Topic } The typical answer is to produce the JSON using Terraform's jsonencode function, which knows how to map all of Terraform's own data types to corresponding JSON ones. There is also a JSON-based variant of the language that is named with the .tf.json file extension. If the JSON is static, reading from S3 might be a good option. What do you do in order to drag out lectures? Consuming JSON and then working with it is not always the easiest. With this, we can easily pass parameters dynamically to our statement file. If you take a closer look at the azurerm_managed_disk.sample_disc property in the JSON, you'll recognize the depends_on property which is automatically configured by Terraform.. Let's add another Azure Managed Disk (Disc-2) and compute its . code of conduct because it is harassing, offensive or spammy. json Synopsis # Generate JSON of inputs and outputs. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. A common theme in all of these examples will be references to path.module, which evaluates to the path where the current module is loaded from. Extract key value from json and populate list in Terraform In this case, you'll need an AWS account and also to have uploaded this JSON from the examples above to somewhere in an S3 bucket for them to be referenced. Asking for help, clarification, or responding to other answers. Any files with names ending in .auto.tfvars or .auto.tfvars.json; file can also be passed with -var-file; environment variables can be used to set variables using the format TF_VAR_name The input field is the event parameter for example: I wonder how I can load the input json data from an external file. Notice that we are accessing our templates rendered version. I have read most of the terraform docs but not able to find exactly how this can be covert to json. I think because I am using the module from anthor directory, so the used path isnt correct. Now we will modify our template file using interpolation syntax. filereads the contents of a file at the given path and returns them as a string. how to you load a file relative to a module that you are using? DEV Community 2016 - 2022. Mobile app infrastructure being decommissioned, Use terraform to set up a lambda function triggered by a scheduled event source, Configure CloudWatch Events to send input to Lambda function with Terraform, AWS Batch input parameter from Cloudwatch through Terraform. LockDuration: 30 seconds, Things to point out: Now, run terraform plan and you should have a Terraform plan for 4 new IAM resources! Are you sure you want to hide this comment? What is the triangle symbol with one input and two outputs? In that case, it's usually complex and slow to formulate a template that will produce valid JSON that will be rendered correctly when using lots of unique insertion sequences and directives. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. This enables granular control and makes the module more flexible and reusable. What laws would prevent the creation of an international telemedicine service? jsonencode ( { dashboard_title = "$ {var.aws_account_name} EC2 Dashboard" }) The template provider is likely to lag behind Terraform Core in terms of which template language features are available, which is another reason to prefer the templatefile function where possible. How to Loop through all found JSON files? : r/Terraform - reddit Terraform - State demystified Thorsten Hans' blog Simplify your Google Cloud firewall rules with JSON and Terraform - Medium file(path) file(path) Copy Strings in the Terraform language are sequences of Unicode characters, so this function will interpret the file contents as UTF-8 encoded text and return the resulting Unicode characters. A Terraform configuration contains one or more provider sections. Terraform strings are sequences of unicode characters, so Terraform can only read files containing valid UTF-8 encoded text. So that i am able to see the output in json file. Name: emailsent, json | terraform-docs Here is the complete main.tf file for a functional example (in my own local dev environment) of utilizing an S3 bucket: So, we're no longer printing output and actually utilizing the JSON to loop over users and create an IAM user for each dev. If youre not sure how to adapt those examples to achieve your goal, I can perhaps provide a more specific example if you can show me what youd like your result to look like if given the example input you shared in your question. That is an old pattern, now deprecated in Terraform 0.12, because the templatefile function makes for a more direct and readable configuration in most cases. The file function What is the mathematical condition for the statement: "gravitationally bound"? }] If you are running Terraform in a containerized environment, passing in as an environment variable may be a good option to differentiate between prod and testing. Well, Terraform has a data resource called template_file. How best to deal with your nested lists will depend on exactly what data structure youre hoping to get. Templates manage the configuration and data files. Find centralized, trusted content and collaborate around the technologies you use most. Once suspended, lucassha will not be able to comment or publish posts until their suspension is removed. You may notice that the standard JSON (metadata, policyrule, parameters) used by Azure policies is embedded in the file along with HashiCorp Configuration Language (HCL). They can still re-publish the post if they are not suspended. If lucassha is not suspended, they can still re-publish their posts from their dashboard. This works for simple string values as shown above, but also complex arrays, maps, and complex data structures. How to pass variables to a JSON file in Terraform - Medium . rev2022.11.14.43031. Hi, I'm using jsonencode() in combination with external data source to pass a json object as as string to an external program.. First, we need to create a user, policy and bucket. Tfvars files allow us to manage variable assignments systematically in a file with the extension .tfvars or .tfvars.json. terraform-docs json [PATH] [flags] Options # --escape escape special characters (default true) -h, --help help for json Inherited Options # terraform apply -var-file="json_variables.tfvars.json" and within my main.tf file, I'm able to reference all the values from the JSON like this (imagine that I want to get VALUE_F from the JSON example from above): $ {var.KEY_C [0].KEY_E [0].KEY_F} and like this, I can get any value from the JSON. Subscribers: [{ EnableBatchedOperations: true, I call them with this forward_to = local.topics.Topics[*].Subscribers[*].ForwardTo but get an error with the syntax. Terraform: using json files as input variables and local variables files = flatten ( [ for file, fileObject in local.json.files: [ for fileLetter, _ in fileObject: { "file" = file, "fileLetter" = fileLetter} ] ]) With the original for v in local.json.files, you're iterating over only the inner objects, e.g. swe/sre in portland. We will then use the bucket ARN in our statement. In a typical statement we have 4 values to satisfy. What paintings might these be (2 sketches made in the Tate Britain Gallery)? Specifying input variables in the "terraform.tfvars" file in HCL syntax is commonly understood. Working with Maps in Terraform Templates as Json This may cause "noise" in diffs in environments where configurations are routinely applied by many . I defined a aws_cloudwatch_event_target in terraform to fire an event to lambda from cloudwatch. mostly write on topics that pique my interest when I have the motivation or time :), # change this to your own aws credentials or profile, # use a data object instead of a resource, # create an IAM user for each user found in the JSON, Circumvent STDIN when installing packages with apt, Parse your escaped JSON with jq and fromjson, Passing in JSON via environment variables, Decoding the JSON into an HCL query-able local variable, Creating an array that loops through each user and attaches their username into the array, Outputs all users by using this local variable, We are now using another Terraform built-in function to expand how we are manipulating the JSON. Which option to choose will therefore depend a lot on the specific circumstances, but always worth considering whether the indirection of a separate file is the best choice for readability. Despite the fact that there are numerous ways to manage variables in Terraform, tfvars files are the best and most common way to do so due to their simplicity and effectiveness.. Knowing that the best way to learn new things is to do them ourselves, we'll approach this . For a full example, see my json_vars_file folder on github. maxb May 4, 2022, 9:16am #2. . terraform - how to return cidr blocks from data "external"? How can I load input data from a file in Terraform? Parse .tf files in JSON so that application can easily read and edit JSON. . Populate Dynamodb table items with single Terraform resource from JSON file locals { json_files = fileset ("../ses_templates/*.JSON") json_data = [ for f in local.json_files : jsondecode (file ("$ {path.module}/$ {f}")) ] } resource "aws_ses_template" "template" { for_each = { for f in local.json_data : f.name => f } name = each.value.name subject = each.value.subject html = each.value.html text = each.value.text } Specifying input variables in the terraform.tfvars file in HCL syntax is commonly understood. We're now using a data source in Terraform, which is just another type of resource that already exists and can be referenced in other resources. The template_file data source is the data source equivalent of the templatefile function. read - (Defaults to 5 minutes) Used when retrieving the Data Factory Dataset. How can creatures fight in cramped spaces like on a boat? How to inject terraform variables in a json file - Terraform The approach we are taking to achieve this requirement is mentioned below: Take .tf files as input. Within the Terraform file, add the following block: To test it out, run a terraform init and then terraform plan! By default, terraform automatically loads. Connect and share knowledge within a single location that is structured and easy to search. Once unpublished, this post will become invisible to the public and only accessible to Shannon. Here is what you can do to flag lucassha: lucassha consistently posts content that violates DEV Community 's Terraform Registry Thanks for contributing an answer to Stack Overflow! The Terraform / JSON methodology works for all rule types and applies that rule in the correct format. I've retained this content as I originally wrote it in case it's useful, but I would suggest treating this option as a last resort. Convert terraform.tfvar file into json - HashiCorp Discuss Once unsuspended, lucassha will be able to comment and publish posts again. 1 Answer. Can an indoor camera be placed in the eave of a house and continue to function? Parse .tf files in JSON so that application can easily read and edit JSON. Terraform also supports an alternative syntax that is JSON-compatible. Terraform strings are sequences of unicode characters, so Terraform can only read files containing valid UTF-8 encoded text. In my case, I make heavy use of template_file as part of the spin-up routine for servers on Equinix Metal which uses cloud-init to run a script on first boot to configure the host. Creating a map from a json file? : r/Terraform - reddit Azure Policy as Code with Terraform Part 1 - Jesse (JSON) Loudon Meaning, you can now use loops, store specific values in maps and arrays, or anything you can think of using HCL (the language of Terraform). Accessing files in other directories is allowed, but in most cases it's appropriate to keep things self-contained in your module by keeping the data files and the configuration files together. Terraform plan output to JSON - Medium Another way to think about that is that it is the directory containing the current .tf file.
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