Terraform create map with for loop

Terraform is a powerful infrastructure-as-code tool that allows you to define and provision infrastructure resources, terraform create map with for loop. In some scenarios, you might need to transform a list of strings into a map of objects for koopman international bv Terraform configurations. Imagine you have a list of property names in Terraform, represented as strings, and you need to transform this list into a map of objects. Your initial attempt, using a for loop, might result in a list of map objects, but your goal is to have a map of properties.

Terraform is a popular Infrastructure as Code IaC tool among DevOps teams because it is a cloud-agnostic framework for developing and deploying infrastructure. Terraform is a declarative language, which means that the desired state is described in manifest files and modules. Terraform also allows the use of meta-arguments and expressions, that simplify the deployment of multiple similar resources. Since v0. The count meta-argument is the simplest of the looping constructs within Terraform. By either directly assigning a whole number or using the length function on a list or map variable, Terraform creates this number of resources based on the resource block it is assigned to. An index object is assigned to each resource represented by the number in the sequence of creation and can be used to differentiate them e.

Terraform create map with for loop

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Already on GitHub? Sign in to your account. While I found some examples on how to produce a list of maps, I am currently failing at producing a map of maps with a nested for loop. I have only managed to get the following errors depending on the variation:. Error: Invalid 'for' expression. Extra characters after the end of the 'for' expression. Error: Missing attribute value. Key expression is required when building an object.

For example, when using count with a list variable, an attempt to change a resource that has been assigned an earlier index in the sequence could have unintended consequences on subsequent resources.

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Terraform for loop is a very powerful tool that helps you write flexible and scalable Terraform code. It is especially useful when it comes to map transformation. It helps when you need more flexibility in your infrastructure code to write DRY code that scales. With a for loop, you can iterate through the keys and values of a map, applying custom logic to each element. This logic can involve filtering out certain elements, generating new keys or values, and creating entirely new maps based on the original data. This can be useful for creating variations of configurations. Map transformation using for loops enhances code readability, maintainability, and flexibility in your Terraform configurations. These examples should give you a solid foundation for understanding how to perform various map transformations using for loops in Terraform.

Terraform create map with for loop

Terraform is a popular Infrastructure as Code IaC tool among DevOps teams because it is a cloud-agnostic framework for developing and deploying infrastructure. Terraform is a declarative language, which means that the desired state is described in manifest files and modules. Terraform also allows the use of meta-arguments and expressions, that simplify the deployment of multiple similar resources. Since v0. The count meta-argument is the simplest of the looping constructs within Terraform. By either directly assigning a whole number or using the length function on a list or map variable, Terraform creates this number of resources based on the resource block it is assigned to. An index object is assigned to each resource represented by the number in the sequence of creation and can be used to differentiate them e. This is due to the unique index object assigned. For example, when using count with a list variable, an attempt to change a resource that has been assigned an earlier index in the sequence could have unintended consequences on subsequent resources.

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References Proposal Assuming this is doable and I am just too dumb to figure it out very likely , some documentation would be really helpful. Would a list work, in place of a map? To find out more about our cookie policy, see here: Privacy Policy. The beta instance is now redundant and needs to be removed, but without affecting the other instances. I had made changes to the expected output on my previous comment in the meantime - a bad edit habit of mine - which I reverted to keep this thread intelligible. Let me spend a little longer thinking about this - I'm still fairly positive that we can't do precisely what you are requesting at this time, but I might be able to come up with a workaround, or at least a better-thought-out feature request : Sorry again, cheers and thanks for the update. This is because the length of the variable the number of items contained within it has been reduced to only three, so the fourth item is removed and not the second. Resources: 0 added, 0 changed, 0 destroyed. The error was mine, I misstated. An index object is assigned to each resource represented by the number in the sequence of creation and can be used to differentiate them e. The problem is that you need the map key at the top level. It is therefore recommended for most use cases. A small variation on this would be to use a local list variable and use this to determine the number of deployed resources. Already have an account? The count meta-argument is the simplest of the looping constructs within Terraform.

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Last active October 10, Don't try this at home. But we already proved I am dumb, so that could just be that. Terraform looping using lists-and-maps-with-for with example. This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. Embed Embed Embed this gist in your website. This helps keep the issue conversation on the topic of the original issue. This site uses Akismet to reduce spam. The image shows that the machine type will be changed. Type your email…. Reload to refresh your session. The Problem Imagine you have a list of property names in Terraform, represented as strings, and you need to transform this list into a map of objects. A good use-case of using for expressions in Terraform is to simplify the management of complex resource objects.