terraform-provider-smallutil

terraform-provider-smallutil

Small utility Terraform provider for command-like data source conveniences.

Currently the following data sources are supported:

• smallutil_http_req
  • Performs a HTTP request (think curl) to obtain a value. Currently only text/plain and application/json are supported, and only string value from one level of object nesting is supported. This data source allows for both override value (i.e. if specified, it will just use this value) and also default value (i.e. if specified, if the HTTP request fails, it will fall back to this value).

How to install

For Linux and Mac OSX users, simply run:

curl -sL https://raw.githubusercontent.com/guangie88/terraform-provider-smallutil/master/install_from_release.sh | bash

This will install the latest version of the plugin and place it into your Terraform plugin directory (creates the directory if it doesn't exist).

Alternatively, you can visit the Releases page and download the zip file corresponding to your OS and architecture.

Unzip the plugin binary into ~/.terraform.d/plugins, or %APPDATA%\terraform.d\plugins for Windows. You may check the official guide

If you prefer to build the plugin from scratch, follow the step here.

Terraform .tf Example

provider "smallutil" {}

data "smallutil_http_req" "plain_tag" {
  url = "http://localhost:8080/plain"
}

data "smallutil_http_req" "json_tag" {
  url                       = "http://localhost:8080/json"
  response_content_type     = "application/json"
  response_content_json_key = ".tag"
}

data "smallutil_http_req" "failed_tag" {
  url     = "http://localhost:8080/no-such-endpoint"
  default = "failed-tag"
}

data "smallutil_http_req" "override_tag" {
  url      = "http://localhost:8080/no-such-endpoint"
  override = "override-tag"
}

How to build

You will need Go compiler >= 1.11 (because this use Go modules).

Simply run at the repo root directory:

go build

This will generate terraform-provider-smallutil binary, which is the compiled Terraform provider module.

Testing

You will need Terraform CLI.

After building, run the following to move the Terraform provider module to the test directory:

mv terraform-provider-smallutil tf_test/

After that, you will need to terminals, one to run the test server, and one to run terraform commands.

Test Server

Navigate to tf_test/server. Run the following:

go build
./server

Test Terraform

Navigate to tf_test/. Run the following:

terraform init
terraform apply

You should see that the terraform apply command run successfully and shows a list of Terraform outputs.