009 - Config file improvements

May 13th, 2024

More and more of your are using config files, and we keep adding better support for more complex apps.

Now, you can split your config file into multiple smaller files and validate it locally.

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Sources

Each part of the config file now supports adding a source, which allows you to split up your configuration into different files.

version = "v1"
description = "Default seed app."
display_name = "Default Seed App."
slack_webhook_url = "seed-slack-webhook-url"

[installer]
source = "./installer.toml"

[runner]
source = "./runner.toml"

[sandbox]
source = "./sandbox.toml"

[inputs]
source = "./sandbox_inputs.toml"
sources = ["./app_inputs.toml", "./app_input_groups.toml"]

[[components]]
source = "./helm_file.toml"

This should make it easier to maintain complex apps, and keep your configuration more DRY. You can even reuse components between applications.

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Template Name

Some of our users were renaming components and running into issues where it was easy to inadvertently break the template variables. This is because the interpolation name used when templating was the component name.

Now, you can set a template_name on any component, and that will be used to reference it:

name = "your_app"
var_name = "app"
type = "terraform_module"
terraform_version = "1.7.5"

[connected_repo]
directory = "components/terraform"
repo = "nuon/demos"
branch = "main"

Then, to reference an output from the your_app component, simply use: {{.nuon.components.app.outputs}}. This allows you to change the component name, without breaking your configs.

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Config Vars

You can now set variables that can be used throughout your config file. This is helpful if you want to configure a branch, or other common configuration:

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Improved Variable Declarations

Previously, you could only set Helm Values, Terraform Variables and other configuration settings using arrays in the config file:

name = "storage"
type = "terraform_module"
terraform_version = "1.7.5"

[connected_repo]
directory = "components/storage"
repo = "nuon/demos"
branch = "main"

[[var]]
name = "resource_group_name"
value = "{{.nuon.install.id}}"

Now, you can set multiple values using vars:

name = "storage"
type = "terraform_module"
terraform_version = "1.7.5"

[connected_repo]
directory = "components/storage"
repo = "nuon/demos"
branch = "main"

[vars]
resource_group_name = "{{.nuon.install.sandbox.outputs.account.resource_group_name}}"
nuon_id = "{{.nuon.install.id}}"

This field will differ based on the component (ie: vars for terraform components, values for helm components, and env_vars for environment variables).

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Validate Locally

You can now validate your configuration file locally:

$ nuon apps validate -c <your-config-file>

This will catch most common issues such as a bad source, missing fields and more.

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Same Component Name in Different App Bug Fixed

We found a bug where if you had components with the same name in different apps, some commands would pick the wrong component.

Now, when you have an app pinned, the CLI will make sure that even if a component exists in multiple apps, it will use your current app.

Make sure to pin an app whenever you are working in the CLI using:

$ nuon apps select 

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More config files!

We keep hearing that these config files are way easier to work with than Terraform, and we’re going to keep making them even easier.

Keep a look out in our Config File reference for more.