Terraform external data source bash. Bash script file vmTags.

Terraform external data source bash For example: #!/bin/bash echo "CONSUL_ADDRESS = How to use external data source in terraform with bash script. The null_data_source data source implements the standard data source lifecycle but does not interact with any external APIs. The mkdef command generates a table definition file in JSON format. tf line 22, in data "external" "bucket_objects": │ 22: program = ["bash", "cli. How to Use Terraform Data Sources? Implementing data sources is a straightforward process. Calling a │ Error: Unexpected External Program Results │ │ with data. To work with external tables, Unity Catalog introduces two new objects to access and work with external cloud storage: databricks_storage_credential represent authentication methods to access cloud storage (e. default_provider - The default authentication provider in use when multiple providers are Aha! Got it. Warning This mechanism is provided as an "escape hatch" for exceptional situations where a rst-class Terraform provider is not more appropriate. Seems not to work. licenses How to use external data source in terraform with bash script. This invokes a process on the machine running Terraform, not on the resource. The trick is having a website such as icanhazip. Or, pass it via a terraform variable. Terraform Version 0. 3. Terraform: using the file interpolation to read local file from a module. Downloads over all You should wrap the terraform commands in a shell script that triggers the python script before running the actual terraform command. The following example creates a table Hi @JustLeo,. I want to use that AMI ID returned from the bash script as an input for my launch configuration. In this case, you can do a 2-step deployment by specifying a -target argument for the terraform The external data source expects its program argument to contain a separate list element for each separate argument to the program. 1 Published a month ago Version 6. sh `echo \"var. exe”, “${path. Stack Overflow The bash script is using AWS CLI to return a list of instance IDs. Unless you explain in more detail what the script does, how the data it generates interacts with the rest of the deployment, what resources depend on Contribute to yyarmoshyk/terraform-bash-external-datasource development by creating an account on GitHub. This resource calls the package. As a working example, if you're terraform external data not returning bash output. In this example, I'm going to use an external data source to create an AWS resource that is not currently supported (an AWS Organizations OU). Similar to null_resource combined with trigger but the output can be saved into our state. I've added count = "${var. external I am on Windows 10 machine, and jq is installed using choco. The resource "aws_instance" block then uses the AMI ID retrieved from the data source to okay got it for doing this thing inside the terraform itself i used external data source and from there i write a bash script and there i fetched the latest image tag and pass and this works – Rohan jangid. I think this will work. number } output "math" {value = local. This is because Powershell doesn't require them to be present, but Unix shells don't support them, so removing them allows the same command to be used on both types of machine. 0 or above), and therefore still require the use of TerraForm 11 and your code also requires the use of the TF data source "aws_vpc_endpoint_service" Hey man, thanks for your answer, which was highly appreciated. For example, if we want to use the following data in Thank you for sharing this. What I guess of that I've tried to retrieve the existing EKS certificate thumbprint with Terraform's external datasource with the following code: thumbprint. Terraform pass the output. As an example, if we look at the example in the documentation: #!/bin/bash # Exit if any of the intermediate steps fail set -e # Extract "foo" and "baz" arguments from the input Provision Instructions Copy and paste into your Terraform configuration, insert the variables, and run terraform init: Use Case Trying to provision a (Docker Swarm or Consul) cluster where initializing the cluster first occurs on one node, which generates some token, which then needs to be used by other nodes join (I have been happily using Terraform plan/apply/destroy etc) data "external" "ssm_parameter_value" { program = ["bash", "-c", <<-EOF result=$ (aws The external data source mandates that the program output must be a JSON object. Provide details and share your research! But avoid . data "http" "myip" { url = "https://ipv4. sh”: fork/exec files/iac_git_info. tf The reason for this behavior is that external is a data source, and thus Terraform expects that it is is read-only and side-effect-free. Reload to refresh your session. tf line 401, in data “external” “git_hash”: 401: data “external” “git_hash” { Error: failed to execute “files/iac_tooling_version. Data sources allow Terraform to use information defined outside of Terraform, defined by another separate Terraform configuration, or modified by functions. 11 or earlier. Using this provider it is possible to write separate programs that can participate in the Terraform workflow by implementing a specific protocol. Thank you for sharing the script. Create a table definition file for a Drive data source: Use the bq mkdef command with the --autodetect flag to create a table definition. For the sake of example, I’ll show it loaded into a Local Value, which could then be referenced . certificate-authority-data has a exact value like i expect but the token is nil or blank. Thank you very much for your response and sorry for not getting back to you earlier. ; Carriage returns (\r) are removed in all input commands. So for some reason I had a hard time using the data source, and it seems that after an apply the data source was saved into the state : terraform state list. 2 min read | by Jordi Prats. The fetched data can then be utilized in the rest of the Terraform Terraform external data source is very useful where terraform fails to give some data or value or inappropriate in some condition. If running tests and acceptance tests isn't enough, it's possible to set up a local terraform configuration to use a development builds of the provider. Skip to main content. Read an external file which contains a variable in Terraform. Warning This mechanism is provided as an "escape hatch" for exceptional situations where a first-class Terraform provider is not more appropriate. As of now, this resource will be re-created if any value is changed. Load a specific tfvars variables file in my Terraform Cloud workspace. As terraform is not capable for this thing and you want to use still terraform in you are workplace then you can use terraform as an Hi @kevin,. We can run any script and u Terraform external data source example - dynamic SSH key generation - ssh_key. I'm calling a python script via the external data source resource as following: For an external data source, I need to run a bash command when I run terraform destroy. How can we load variables automatically from terraform state file? 3. In both cases, the JSON data will be a JSON object with all External data sources are extremely useful in terraform – the data ‘external’ is defined for just this use case. 15. 1 Terraform and tagging AWS resources from an external json file. I'm using the external data source to call a bash script, and pass the parameters (e,g, bucket name, region). Use that function instead, unless you are using Terraform 0. data "external" "amiid" { external. result[0]} Schema Required. Here TL;DR: Invoking the external tool you need, and specifying the parameters it requires directly in the terraform plan is the way to go. For example, a provider configuration cannot depend on a data source. Storage credentials are access-controlled to determine which users can use the credential. 14. Modified 5 years, 5 months ago. The terraform import command brings existing resources into Terraform state. The aws_s3_bucket Use data sources to allow Terraform to use external data, function output, and data from other configurations. plan failes with a message saying: "Error: command "env" produced invalid JSON: unexpected end of JSON input". Alternatively, instead of using curl you can use the HTTP provider (if there's a way The command being run by the external provider here is equivalent to the following:. It re-runs data sources for every plan. sh"] │ │ The data source received How to use external data source in terraform with bash script. I’m using Terraform just to build CICD, alarms, dashboards, SNS. result [0]. How to run a powershell script in terraform? 0. You signed out in another tab or window. Terraform offers the external data source which is a configurable gateway between Terraform and the system it's running on. com" } The data "aws_ami" block defines a data source that fetches information about the latest Amazon Linux AMI. sh I assert that environment variable SOME_ENV is set and I’ve tried using Data aws_efs_Access_points block and was successful only if File system already exists so I went with the External data source block with Python script. Anyway, whenever I try to use the I have a terraform datasource: data "external" src { program = ["bash", "my_script. But I keep receiving this Error: This mechanism is provided as an "escape hatch" for exceptional situations where a first-class Terraform provider is not more appropriate. I wrap most of my terraform commands (terraform init, terraform workspace create/select, terraform providers, etc. shell script returns the result in command line. my_value to something that would be misinterpreted by the shell. This retrieves the configured HashiCups client from the provider and makes it available for data source operations. active_directory - A active_directory block as defined above. The problem I'm having is that the NetworkObtainedData external data source needs to be invoked machine_count times. I have run my get-token. checked in to version control alongside the . ingress[0] I am using Terraform External Data Source to get a response from the Azure DevOps rest api (objectId of the branch to be used as further input to other scripts/actions). 9. but the provider doesn't seem to read the value from the data source result. for each in terraform - pick values from text file. So to continue your example PowerShell script you might want something like this (untested): sql_query (Data Source) The sql_query datasource allows you to execute a SQL query against the database of your choice. get_googlebot_ips_using_shell, │ on main. Bash script file vmTags. 0 Use some value from terraform file to json file. test. an IAM role for Amazon S3 or a service principal for Azure Storage). get_token. status. when i execute the Python script it returns the values as expected but when executing in Terraform it errors out as below. You can run a command from there and retrieve the output(s), the only catch is that the command needs to produce json to standard output (stdout). sh”: fork/exec files/iac_tooling_version. GitHub community articles Repositories. First, use make install to place a fresh development build of the provider in your ${GOBIN} (defaults to ${GOPATH}/bin or I would like to try if terraform data source will be able to place the output to a text file. My first suspicion would be that the external program is not producing a suitable value, but I don't know why that would be the case. I hope this is some help to others trying to solve this problem. 13 Terraform use local provider/plugin. This is my preferred one for a shell data source; use it with the curl command (forget jq), then use jsondecode on the stdout response and access whichever fields you need. My workaround is to encode it with base64 on Terraform side and decode it on bash side. do-token\" | terraform -chdir=/input console -var-file terraform. ), REST APIs, and object models. 30. Running Terraform v0. Error: failed to execute “files/iac_git_info. The null_resource in Terraform is a versatile tool for executing scripts. How can I load input data from a file in Terraform? 1. Basically everything but the Lambda functions themselves. Commented Oct 10, 2022 at 6:54. In this example, we’re using the aws_s3_bucket data source to retrieve information about an existing S3 bucket named example-bucket. Source Code hashicorp/terraform-provider-external Provider Downloads All versions Downloads this week 3. it only returns resultid = “” data "external" "get_inst_id" { program = ["bash", "shscripts/demo. But when terraform want to parse it, the value is not parsed successfully. 10. The External Data Source looks like a perfect solution to my problem. Intro: a data source is a mechanism for fetching and utilizing information from external sources or existing infrastructure. Downloads this year 4. So the following plan did not recreate the data source that I was using to execute the curl. id } sh script: aws ec2 describe-instances --region us-west-1 > How to use external data source in terraform with bash script. To be able to read the data the command will have to output the data using JSON. I am using an external program to run an AWS CLI query. The external data source isn't able to infer what the Terraform operation type is as it is only sent the data in the query argument, as mentioned and shown in the data source's documentation. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog When your infrastructure interacts with custom APIs or external databases, Terraform data sources can fetch and integrate the needed data. The external data source in particular needs JSON output on stdout which could then be accessed under the result attribute of the data source. You cannot provide this with script or scripts. If it’s working for you then I’m not going to tell you not to do it, but please do keep in mind that Terraform will re-run that script on every The template_file data source renders a template from a template string, which is usually loaded from an external file. Using Data Sources. Using this provider it is possible to write separate programs External data sources are an interface for running a command locally, on the machine that runs terraform, and providing the console output of that program as a data Terraform External Data Sources offer a powerful capability that allows us to incorporate external data into our Terraform configurations, expanding the scope of what we Sorry for the detailed question but thanks for the clue I found the issue, if you run a shell script from terraform via data source external then it expects the output of the script should be formatted in Json. bash "export ENC_HOOK_URL=$(aws --profile ${AWS_PROFILE} \ kms encrypt --key-id I am on Windows 10 machine, and jq is installed using choco. 0 Published 8 days ago Version 6. It’s a mechanism to allow a local script to act as a data source. tpl, use the template provider to then create the template. What we will cover in this project: In this project, we’ll explore how to leverage Terraform Data Sources If I'm understanding correctly, it seems that this program produces a list of strings, which doesn't match the external provider's requirement of producing an object whose property values are all strings. The following arguments are supported: input - (Optional) A value which will be stored in the instance state, and reflected in the output attribute after apply. ) in a script, so that's the natural solution for me. external as the following: ‘The external data source allows an external program implementing a specific protocol to act as a data source, exposing arbitrary data for use elsewhere in the Terraform configuration. sh #!/bin/bash THUMBPRINT=$(echo | openssl s_client -servern │ Error: Unexpected External Program Results │ │ with data. The syntax involves specifying the data source type, name, and any required arguments. Each provider may offer data sources alongside its set of resource types. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I would like to use terraform's external data source to identify certain AWS EC2 instances: data "external" "monitoring_instances" { program = ["bash", "${path . Notice in this example that the "result" map contains the "foo" key and "bar" value. data "external" "example" { program = [ "perl", "sample. module}/getDateTime. Error: Unexpected External Program Results External Data Source The external data source allows an external program implementing a specific protocol (defined below) to act as a data source, exposing arbitrary data for use elsewhere in the Terraform configuration. The script is invoked and runs the method prepare_command method. loadBalancer. I was not aware of external data sources in Terraform. 12 and later, the templatefile function offers a built-in mechanism for rendering a template from a file. Update ‘kubernetes_controller. Hey man, thanks for your answer, which was highly appreciated. result, "token")}. I'm not familiar with the Azure CLI you are running here and so I can't be sure how exactly it interprets its command line, but guessing based on typical conventions for Windows CLI applications I would try the following: Terraform: Using the external data source. auto. bash "export ENC_HOOK_URL=$(aws --profile ${AWS_PROFILE} \ kms encrypt --key-id This is only useful, if you cannot upgrade to TerraForm version 12 or above (a version that can use the AWS provider v3. This external program is used to populate an aws_lambda_function data source, because instead of using Terraform we’re using dotnet-lambda deploy. We’re then outputting several attributes of the bucket using the output block. Hello Terraform users, I am trying to run a powershell script The program argument to the external data source is following that convention: This should then produce the same result as if you were to run the following command in Bash, on a Unix system: The first thing to checkout is the archive_prepare external data source. Next you can find the example of the bash » External Data Source The external data source allows an external program implementing a specific protocol (defined below) to act as a data source, exposing arbitrary data for use The external data source is designed to integrate with specially-designed external software which generates JSON, so any output that isn’t JSON would be considered invalid. Terraform's external data source: STDOUT syntax unclear. What are Data Sources? Data sources allow Terraform to fetch data from external sources and use it to configure resources within your Terraform In data. For whatever reason, on my machine, the bash scripts used windows-style carriage returns which bash did not like. The external resource allows an external program implementing a specific protocol (defined below) to act as a resource, exposing arbitrary data for use elsewhere in the Terraform configuration. Topics Trending Collections Enterprise This repo contains an example of using bash script to extract some data that can't be achieved by terrofrm and next use it in Argument Reference. toolbox_external. Using output from bash script as variable within Terraform. 13. Does the program in the external data source get executed when the result is referenced, or it is executed earlier? The json parsing ability of external data source is very limited. You signed in with another tab or window. sh manually and it's good. 0. tf in the same directory as your main root module (main. For instance, querying a custom API to retrieve user data. sh"] } In the my_script. (Unfortunately the provider is presenting that requirement using Go terminology rather than Terraform terminology: map[string]string is the Go equivalent of a JSON object with all of Terraform external data source using custom Python script with example There may be a situation where you want to utilise a custom script or additional logic in Terraform. Hot Network Questions Why is there no AES-512 for CTR & variants to An external data source is a data source that you can query directly even though the data is not stored in BigQuery. See documentation here. Define the data source data model. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I'm not sure why the external data source would change the result here. /get_googlebot_ips. Update: Here is an example. The cloudinit_config data source renders multi-part MIME configurations for use with cloud-init. This prepares the data source to set Terraform state with the list of coffees. Hello, I am using git actions for deployment with terraform but external data source section is throwing an error. 8. additional_login_parameters - A additional_login_parameters block as defined above. About; Products OverflowAI; Stack Terraform's external data source: STDOUT syntax unclear. There's an easier way to do that without any scripts. I'm doing some testing with creating an S3 bucket, because the workflow is similar. The best way to achieve what you're trying to do (generate an openssh public key from an id_rsa private key) is using the tls_public_key data provider built-in to terraform. Data sources are intended to have no side-effects. machine_count}" within NetworkObtainedData, right above the program to be invoked. This page describes the basic implementation details required for supporting a data source within the provider. This is my data source data "external" "token If you forget, other commands will detect it and remind you to do so if necessary. 1 Cycle Through External Data Source in terraform. on main. Pass terraform output from one file to another. You'd need something such as '{"clientId":"123456"}'. If you want to avoid the script completely, what Mark B suggested in his comment above is the best way to go about it. I have a different script that is looking like this: main. This way you can be sure that an apply or destroy operation will only happen on a plan that has been saved Unfortunately you can't. One more simplified example is here: External Provider. Update. 14. My various commands indeed return JSON but the fact is that my terraform plan -out=terraform. result in: ${data. Schema Required. result. Configuring Terraform Data Sources The terraform console command in Terraform opens an interactive console where you can evaluate and explore Thanks, Martin. Its capabilities are limited in comparison to a true data source, and implementing a data source via an external program External data source. Define the data source schema. This can be Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog If only one of command_unix or command_windows is provided, that one will be used on all operating systems. I have a question, because I don't understand completely the execution logic in terraform. 2 Here is the relevant code: data "external" "cloudfront_ip_addresses" { program = External data sources are an interface for running a command locally, on the machine that runs terraform, and providing the console output of that program as a data source. Load 7 more related questions Show fewer related questions Sorted by: Reset to default Know someone who can answer? Share Latest Version Version 6. Although it's usually not recommended for a child module to have its own provider blocks, that is allowed and can be okay if the provider in question is only being used to fetch A auth_settings block exports the following:. I have a simple terraform configuration to understand external provider. What I tried so far : run TF_LOG=TRACE terraform plan -out=terraform. All this local script needs to do to qualify as a valid data source is This can be a convenient escape hatch if there isn't already a provider that offers a more specialized data source, but it does introduce a dependency on external software outside of Terraform's direct scope, which may make it more complicated to use your Terraform configuration across different operating systems that may have different software or versions There are a couple modules that have been built to handle this situation and make it a lot easier to work with. I think one problem here is that you have some extra quotes around the JSON you are trying to print, and so I think the JSON parser is seeing the string "{" followed by just the letter c from commit, and is therefore failing. The provisioner uses a default shell unless you specify a shell as the first command (eg. Implement the HashiCups client in the data source. When I have jq Attempting to use a Bash script to pull in AWS's CloudFront IP addresses for whitelisting. It's like an escape hatch. 7 Affected Resource(s) external Terraform Configuration Files data "external" "create_policy" { program = ["bash", "$ /203682601-Pingdom-probe-servers-IP-addresses To manage these IPs automatically, there is a bash script that populates a Terraform external data source. The same can now be achieved using locals or the terraform_data resource type in Terraform 1. And then you'll just want to pass the rendered script into the user_data argument for your aws_instance resource. Some things I have tried * output. JSON, CSV, XML, etc. The external data source allows an external program implementing a specific protocol (defined below) to act as a data source, exposing arbitrary data for use elsewhere in the Terraform configuration. 2 Here is the relevant code: data "external" "cloudfront_ip_addresses" { program = Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Ultimately what I want to do is create a list of the componentID variables which are located within the external data source. One way to avoid that would be to use the replace function to apply single-quoting to the value, assuming this script will ultimately be evaluated by a Unix A special provider that exists to provide an interface between Terraform and external programs – useful for integrating Terraform with a system for which a first-class provider does not exist. 2. 3 ! terraform plan data. Note. How to use terraform import with passed-in variables? 58. sh"] } output "resultid" { value = data. This tutorial covers how to execute shell/bash scripts in Terraform, from basic to more advanced examples. You switched accounts on another tab or window. sh"] │ │ The data source received unexpected results after executing the If you want to use the result of the script in the same Terraform file for other resources, you need to use the Terraform external data source, see the details here. 4 and later. Stack Overflow. 4. thanks for the response. The command being run by the external provider here is equivalent to the following:. Chapter V — Dynamically fetch data from remote using data source in Terraform/OpenTofu. And the external provider in this case is bash. tf line 18, in data "external" "get_googlebot_ips_using_shell": │ 18: program = ["bash",". # review the execution plan for the changes that Terraform will apply terraform plan data. external: key "0" does not exist in map data. If this JSON file is something you intend to include as part of your Terraform configuration (e. Terraform - Using Local Command Result as an Variable for tf file. external. , #!/bin/bash). #!/bin/bash set -e kubectl get svc mygateway -n istio-system -o json | jq . How do I save the output variable from terragrunt apply as regular shell environment variable? 1. All gists Back to GitHub Sign in Sign up Sign in Sign up You signed in with another tab or window. Our terraform config: data "external" "vault_auth" { program = [" bash ", " $ #! You can add the cloudinit_config data source to your Terraform configuration and specify the files you want to provision as text/cloud-config content. id (String) The ID of a configured external auth provider set up in your Coder deployment. To be able to execute an arbitrary command to retrieve some data and being able to use it as a variable in terraform we can use the external data-source. access_token (String) The access token returned by the external auth provider. 2 Dynamic data source in Terraform 12. 0M. Prerequisites: Basic understanding of Terraform; Terraform installed on your machine; Basic Shell/Bash scripting knowledge; Basic Execution Using null_resource. I had this problem before (a recent issue) so maybe it's just me. Keep in mind, within terraform, external data is run on every apply. ; Optional. I have a different script that is looking like this: The local-exec provisioner invokes a local executable after a resource is created. optional (Boolean) Authenticating with the external auth provider is not required, and can be skipped by users when creating or updating workspaces; Read-Only. source, exposing arbitrary data for use elsewhere in the Terraform con guration. Unlike managed resources, Terraform does not manage the lifecycle of the resource or data. Attempting to use a Bash script to pull in AWS's CloudFront IP addresses for whitelisting. Viewed 2k times Throw your script into the file templates/user_data. com which retrieve your IP, so set it in your terraform file as data:. <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 I have a bash script that will return a single AMI ID. external is a special provider that exists to provide an interface between Terraform and external programs. In this example, we’re using the aws_ami data source to fetch the latest Amazon Linux AMI. Terraform apply does not return the result. What you are trying to achieve is not what / how terraform is supposed to be used. triggers_replace - (Optional) A value which is stored in Note that if consul acl bootstrap is actually modifying Consul in some way then this is technically a bit of a misuse of the external data source, because data sources are supposed to be for reading data only, not for performing side-effects. 0 Terraform Custom Provider - Data Source. These When certain commands are run (plan, apply, plan_destroy, destroy) Terraformsh will use the appropriate options to create a plan file. icanhazip. bucket_objects, │ on data. Unable to fetch data using external data source. Fund open source developers The ReadME Project. HashiTalks 2025 Learn about unique use cases, homelab setups, and best practices at scale at our 24-hour virtual knowledge sharing configurations must not depend on non-variable inputs. The external data source allows an external program implementing a specific protocol (defined below) to act as a data source, exposing arbitrary data for use elsewhere in the Terraform has the external data source that allows to run external program and handle it’s outputs in further infrastructure code. Its capabilities are limited in comparis I am trying Terraform External data source to get a response. I know that there is no error handling. Thanks! – Mule. The following arguments are supported: inline - This is a list of command strings. sh: %1 is not a valid Win32 application. This can be achieved by leveraging the Terraform CLI configuration file development overrides. g. Skip to content. py python script with the argument prepare. What is an External Data Source. I was looking on it online but not able to find any, I plan to perform on getting the load balancer name and after that our automation script will perform aws-cli command and will use the load balancer name taken by the data-source This command returns json: aws ec2 describe-instances --instance-ids i-xxxxx But terraform complains: data "external" "sdfsdfsdf" { program = ["bash", "-c", & Skip to main content. plan 2>&1: the plan is executed correctly. templates/user_data. How to use external data source in terraform with bash script. math } Copy. External data providers also receive any query data via stdin. component_ids. 0 null_data_source. <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 Data Sources; External Provider. tf), external data source can use the JSON. Downloads this month 4. tf’ by adding an external data source at the bottom of the file. Hands-on: Try the Query Data Sources tutorial. A data source is accessed via a special kind of resource known as a data Here’s how data sources are used in Terraform. I’ve made the incorrect assumption that only 2 values are supported for the program attribute inside the How to use an AWS cli command in a Terraform external data source 1 Terraform Launch Script too long for AWS: expected length of user_data to be in the range (1 - 16384), got #!/bin/bash An alternative way to address this would be to write a data-only module which encapsulates the data fetching and has its own configured aws provider to fetch from the right account. sh"] │ │ The data source received unexpected results after executing the program. This Hi, I have been facing below issue on executing terraform plan command. Asking for help, clarification, or responding to other answers. See the remote-exec provisioner to run commands on the resource. sh: %1 Hi @raphaeljuwe!. ’ data "external" "fetchssh" { program = ["sh", "/input/get_sshkey. 'foo' as string"} locals {# The number column in this case is a Terraform "Number" type # so you can use it as such: math = 1 + data. Using Terraform list of strings as an array in Shell template script. However when trying to assign each IP address returned to a VM, using ipv4_address = Here’s an example of using the AWS data source in Terraform to retrieve information about an existing Amazon S3 bucket. The solution I have found is to instead use an external data source block. tf files) then you can load the data structure from it into Terraform using the file function and the jsondecode function. . sh: #!/bin/bash az vm show -d -g myGroup -n myVM --query tags Terraform external data source: Use the result of the script in a Terraform data source, with an external provider. tf When running an ad hoc script using the Terraform external data source you need to return a valid json object (The docs also mention a map of string) which "123456" is not. get_googlebot_ips_using_shell: Reading ╷ │ Error: Unexpected External Program Results │ │ with data. Local bash variables in terraform tpl. allowed_external_redirect_urls - A allowed_external_redirect_urls block as defined above. 1. pl" ] } The terraform console command can be used to display the map being returned. Is there a way to do an if to trigger this? dealing with external data sources when running destroy in terraform. I’m not very familiar with PowerShell myself so I can’t show any concrete examples, but I can say that the key requirement for the external provider is that the program it’s running must read the data from its input and parse it as JSON, and then print JSON to its output as the result. get_inst_id. query (String) The I would suggest doing that as a new data source in the local provider though, not as an extension of the external data source, because the external data source was designed for use with programs tailored to work with Terraform (as a middle-ground to allow writing small glue programs rather than entire new Terraform providers), not for executing arbitrary existing Expected Behavior. The terraform documentation describes data. Historically, the null_data_source was typically used to construct intermediate values to re-use elsewhere in configuration. Need an experienced Cloud Networking or a Cloud Data Protection Expert? Anuj has successfully delivered over a dozen deployments on each of the public clouds (AWS/GCP/Azure) including several DevSecOps engagements. When I have jq Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Note that even though the resource will be fully created when the provisioner is run, there is no guarantee that it will be in an operable state - for example Data sources are an abstraction that allow Terraform to reference external data. data “external” “extDateTime” {program = [“Powershell. You can define scripts here and as long as they conform to the data source's API, it is considered a first-class citizen. Hot Network Questions How to solve Dice Please note that with just a direct reference to the value the result will not necessarily be valid shell syntax -- the caller could potentially set var. In order to do this via an external script, it would be necessary to use a resource provisioner to run the script and upload it to S3, since there is currently no external equivalent for resources, which Sometimes, there isn't Terraform GCP support for a particular feature, or you'd like to do something each time Terraform runs (ie: upload a file to a Kubernetes pod) that lacks Terraform support. With that said, if what you did with the local_file data source is meeting your needs then that’s fine! I’m just sharing the above in Argument Reference. tpl #!/bin/bash echo ${master_ip} terraform_file. I have added ' before and after the variable ${lookup(data. 7M. exe" produced invalid JSON: unexpected end of JSON input. tf. I would expect to not run into any errors. Modify as necessary. ps1”]} output “value” {value = “${data. PowerShell is a cross-platform (Windows, Linux, and macOS) automation tool and configuration framework optimized for dealing with structured data (e. While we can use them to read data by exploiting the side-effect of creating a temporary file on disk, the external data source more directly represents the intent to gather some data without side-effects. Let’s create a custom If so, you might consider running that command and storing the result in an env var before launching terraform. Pass the files in the content field as YAML-encoded configurations using the write_files block. You can terraform の external data source を使って外部コマンドの実行結果を variable として使用する - data. The raw output from this command would be something like this: Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Ask Question Asked 5 years, 5 months ago. This module does not create any resources on GCP itself, rather exposes the GCP SDK to you for usage in null resources & external data resources. sql_query. In Terraform 0. Terraform: command "Powershell. Execute Terraform apply with AWS assume role. HashiTalks 2025 Learn about unique use cases, homelab setups, and best practices at scale at our 24-hour virtual knowledge These things may look overwhelming to you, so let's understand data source through a hands-on example project. Seems like there's nothing wrong with the output, it's valid json (by the looks of the TRACE logs). From bash, I will init/apply a Terraform script that checks if my resource exists, like so below. Using the external provider should be considered an option of last resort because it introduces dependencies on the local OS which may not be portable. script - This is a path (relative or absolute) to a local script that will be copied to the remote resource and then executed. I wrote a quick bash script to call gsutil to get my GCP Cloud Storage bucket. A data source needs to output something which you don't currently appear to be doing. It should be (escape quote and return new json): How to use external data source in terraform with bash script. I can see examples using bash scripts, python, and JavaScript. tfvars`"] } Using the external data source in Terraform to recursively run another terraform is a pretty irregular thing to do, but as long as there's such a variable defined in that configuration I suppose it could work. njyfwi izsda jrxtoc eeygu ephym hgftiz ugvctj wkighec vjma vmlx