Terraform merge

Collaborating around Infrastructure as Code IaC changes requires both code changes and expected infrastructure changes to be checked and approved. GitLab provides a solution to help collaboration around Terraform code changes and their expected effects using the merge request pages. Using the GitLab Terraform Report artifactterraform merge can expose details from terraform plan runs directly into a merge request widget, enabling you to see statistics about the resources that Terraform creates, modifies, or destroys, terraform merge.

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. The text was updated successfully, but these errors were encountered:. Hi dsiguero ,. I think the difference between your two cases here is the argument order.

Terraform merge

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. The merge function doesn't honor maps with nested properties as I would expect. I would expect to be able to overwrite a single nested value, but instead nodes that are missing are omitted from the output. It feels more like the second arguments root level properties just overwrite those of the first argument. The issue can be worked around by using smaller chunks of maps and then building a larger map from the resulting merges. The other option is duplicating the data is both places to ensure that data is not dropped on merge. The output should be a true merge of the maps in a recursive fashion, rather than a simple root comparison.

I've tried various solutions in this thread and KyleKotowick 's solution with a module worked perfectly for my use case merging maps that were levels deep, terraform merge. Terraform terraform merge is a built-in function. You signed in with another tab or window.

Functions in Terraform allow you to manipulate data, perform calculations, and create more dynamic configurations. They are an essential part of the Terraform language and can be used within expressions to achieve various tasks. In this article, we will take a look at what the Terraform merge function is and how to use it, with a few useful practical examples showing how to merge lists of maps, lists of objects, and apply merged lists of tags to cloud resources. Terraform merge is a built-in function. The merge function takes an arbitrary number of maps or objects and returns a single map or object that contains a merged set of elements from all arguments.

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. I have a dynamically-generated map of maps or list of maps , and I'd like to merge them all down to a single map, using standard merge map1, map2, FWIW, using merge with objects also seems to work, as it's a shallow merge, so I'd like to keep that behavior, too. I use these for picking up hierarchical variables from my directory structure using terragrunt -- if the same key is present when merging the maps, the one nearest to the local directory wins.

Terraform merge

The end result seems to be the only values that end up in local. Is this possible with objects? Or is there a better way to do this?

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You switched accounts on another tab or window. Sorry about that, the new release v0. Notifications Fork 9. I've abandoned and closed the PR I put it, it's hopelessly out of date and Hashi has given little guidance on the issue. Skip to content. Hi kkotowick! Another way to achieve the same output is to use the flatten function:. It's common for data structures in Terraform to include lists and maps of nested objects, like the following example variable:. Propose functionality by submitting a feature request. It's only when the shared key's value is a map and object that merge does not behave as most would expect, overwriting the map or object instead of propagating the merge operation to the next level. There is a bit more info in the original feature request thread.

Quick Fix: Implement setunion function to unify multiple sets of objects into a single set, preserving the unique elements of each input set. You have two lists of objects in Terraform, each representing a set of variables with their respective values and workspace names.

Consider we have two maps of objects we want to merge together defined in our Terraform locals declaration :. Terraform 0. You signed out in another tab or window. To start though, I did a small survey of some similar functions in other ecosystems, and also compared those with the implementation you proposed in :. This setting ensures artifacts are accessible only to GitLab administrators and project members with at least the Reporter role. In the meantime it's possible to implement something that is functionally equivalent to a function in a provider using a data source, at the expense of the syntax being far less convenient to use. You switched accounts on another tab or window. Soooo what's holding this up? Our friends who want to concisely write out default values for variables have typically expressed that they want to be able to specify defaults for attributes in nested objects too, but none of the sequence-merging behaviors above really meet that need. So data in 'Common' will be overwritten by data in 'Region', etc. Being able to do the same thing without having to use my deepmerge module would be fantastic. What is merge in Terraform?