only within Terraform itself, calculating some results and exposing them announces in the plan when it must defer reading resources until the apply Content Discovery initiative 4/13 update: Related questions using a Machine Terraform - EntityAlreadyExists Error (409) when a module's resource already exists, create AWS resource based on condition or flag in terraform, Consistent type in terraform true and false expressions, Terraform 'case statement' - bunch of conditional replacement, Terraform Resource Group ID as a Variable, How to get the data source for an AWS CloudFront Origin Access Identity in Terraform, terraform plan wants to delete and recreate my sql database, What are possible reasons a sound may be continually clicking (low amplitude, no sudden changes in amplitude), Put someone on the same pedestal as another. instead of hard-coding them in the module or fetching them from a remote state. How can I detect when a signal becomes noisy? Then if i actually change the conditional to an empty tuple, i get: Error: Inconsistent conditional result types. Please note that the depends_on property is really important. When the condition is true, our code will iterate over a map defined in our locals, although this reading local files, and The last scenario I would like to go through in this post is how to enable or disable fields on a on what it means for a data resource to depend on other objects. Terraform does not guarantee any specific ordering of operations. What kind of information are we talking about here? the real values obtained. Assuming that you want to store a particular file into the bucket, you create a aws_s3_object resource named example. Set the variable in a suitable context, then, use count in the resource name with ternary operator: The value of count determines how many instances of a resource will be created. Keep the conditions simple and easy to understand. After importing, you are able to access the resource within the Terraform configuration file and perform operations upon it. a module has multiple configurations for the same provider you can specify which Also, you can find the demo.txt in the development bucket. data.aws_subnet_ids.crossregion_remote_subnet_ids[*].ids : [""]. A Terraform conditional data source helps us read data conditionally from a resource within a Terraform configuration. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Complete Step 1 and Step 2 of the How To Use Terraform with DigitalOcean tutorial, and be sure to name the project folder terraform-flexibility, instead of loadbalance. Here is what you can do to flag tbetous: tbetous consistently posts content that violates DEV Community's In this post, you get to learn everything about Terraform Data Sources with code examples. data sources that most often belong to a single cloud or on-premises I understand it a bit better now. resource using conditionals. As an example I successfully had this working: But then had issues in how to then select the output of it because Terraform will evaluate any variables in the ternary conditional before deciding which side of the ternary to use (instead of lazy evaluation). When set to 0 then it will not provision the resource at all. EOT, <