Terraform merge

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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 artifact , you 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. For a quick setup, you should customize the pre-built image and rely on the gitlab-terraform and gitlab-tofu helpers. Create an alias for a specific jq command that parses out the information we want to extract from the terraform plan output:. Define a script that runs terraform plan and terraform show. The Terraform report obtains a Terraform tfplan.

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.

If you want help with something specific and could use community support, post on the GitLab forum. We went through examples showing how to merge lists of maps, lists terraform merge objects and apply merged lists of tags to cloud resources. If you have found a problem that seems similar to this, terraform merge, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.

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. Keep in mind that the merge function is available in Terraform versions 0. If you are using an earlier version of Terraform, you might need to use alternative methods like the concat function or the for expression to achieve similar merging behavior.

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? The merge function does only a shallow merge, so the fact that primary is present in var. Hi apparentlymart , is there any chance a deep merge function would be implemented in Terraform anytime soon? My intent with the object is to be able to add arbitrary tags at the tfvars level that can be selectively applied to a multitude of modules and resources that live a few layers deep inside other modules they will also be used to override other tags if needed. The additional tags that are passed in are only applied to specific resources in the sub-modules, for example, one of the sub-modules might have something like this:.

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 artifact , you 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.

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It's common for data structures in Terraform to include lists and maps of nested objects, like the following example variable:. Read also. Terraform Version Terraform v1. Hi bruceharrison! This capability has really simplified configuration, each of my modules now has a defaults and various overrides and I merge them with this module. You switched accounts on another tab or window. The text was updated successfully, but these errors were encountered:. My personal routine is to create workspaces that encode 'facts' about the environment that I'm deploying into. Arguably larger and more difficult to implement, but that would remove the necessity of this function at least in this case. I would expect to be able to overwrite a single nested value, but instead nodes that are missing are omitted from the output.

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.

Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Get Help If you didn't find what you were looking for, search the docs. My use case is similar to kkotowick, and it sounds like I agree with his implementation as well. Jack Roper Jack Roper is a highly experienced IT professional with close to 20 years of experience, focused on cloud and DevOps technologies. The Terraform report obtains a Terraform tfplan. References The current documentation doesn't mention nested properties at all, so if this work is rejected, it may be worth making a note of this behavior in the documentation. While waiting for that PR to be merged, I built a module to do this in pure Terraform. Support for draft anchor merging would help here. Sign up for free to join this conversation on GitHub. Example 4: Terraform merge tags One common use case for using the merge function is to merge together lists of tags applied to cloud resources. The other option is duplicating the data is both places to ensure that data is not dropped on merge. I think this issue represents the possibility of finding a new variant of that which is clearer how to use correctly. It's common for data structures in Terraform to include lists and maps of nested objects, like the following example variable:. Being able to do the same thing without having to use my deepmerge module would be fantastic. It's the lightest weigh answer to the problem being a pure HCL module that I can reference from github and not have to setup a required provider.