Cloudflare Terraforming

Overview

cf-terraforming is a command line utility to facilitate terraforming your existing Cloudflare resources. It does this by using your account credentials to retrieve your configurations from the Cloudflare API and converting them to Terraform configurations that can be used with the Terraform Cloudflare provider.

This tool is ideal if you already have Cloudflare resources defined but want to start managing them via Terraform, and don't want to spend the time to manually write the Terraform configuration to describe them.

Read the announcement blog for further details on using cf-terraforming in your workflow.

Note If you would like to export resources compatible with Terraform < 0.12.x, you will need to download an older release as this tool no longer supports it.

Usage

Usage:
  cf-terraforming [command]

Available Commands:
  generate    Fetch resources from the Cloudflare API and generate the respective Terraform stanzas
  help        Help about any command
  import      Output `terraform import` compatible commands in order to import resources into state
  version     Print the version number of cf-terraforming

Flags:
  -a, --account string                  Use specific account ID for commands
  -c, --config string                   Path to configuration file (default is $HOME/.cf-terraforming.yaml)
  -e, --email string                    API Email address associated with your account
  -h, --help                            Help for cf-terraforming
  -k, --key string                      API Key generated on the 'My Profile' page. See: https://dash.cloudflare.com/profile
      --resource-type string            Which resource you wish to generate
      --terraform-binary-path string    Path to an existing Terraform binary (otherwise, one will be downloaded)
      --terraform-install-path string   Path to an initialized Terraform working directory (default ".")
  -t, --token string                    API Token
  -v, --verbose                         Specify verbose output (same as setting log level to debug)
  -z, --zone string                     Limit the export to a single zone ID

Use "cf-terraforming [command] --help" for more information about a command.

Authentication

Cloudflare supports two authentication methods to the API:

• API Token - gives access only to resources and permissions specified for that token (recommended)
• API key - gives access to everything your user profile has access to

Both can be retrieved on the user profile page.

A note on storing your credentials securely: We recommend that you store your Cloudflare credentials (API key, email, token) as environment variables as demonstrated below.

# if using API Token
export CLOUDFLARE_API_TOKEN='Hzsq3Vub-7Y-hSTlAaLH3Jq_YfTUOCcgf22_Fs-j'

# if using API Key
export CLOUDFLARE_EMAIL='[email protected]'
export CLOUDFLARE_API_KEY='1150bed3f45247b99f7db9696fffa17cbx9'

# specify zone ID
export CLOUDFLARE_ZONE_ID='81b06ss3228f488fh84e5e993c2dc17'

# now call cf-terraforming, e.g.
cf-terraforming generate \
  --resource-type "cloudflare_record" \
  --zone $CLOUDFLARE_ZONE_ID

cf-terraforming supports the following environment variables:

• CLOUDFLARE_API_TOKEN - API Token based authentication
• CLOUDFLARE_EMAIL, CLOUDFLARE_API_KEY - API Key based authentication

Alternatively, if using a config file, then specify the inputs using the same names the flag names. Example:

$ cat ~/.cf-terraforming.yaml
email: "[email protected]"
key: "<key>"
#or
token: "<token>"

Example usage

$ cf-terraforming generate \
  --zone $CLOUDFLARE_ZONE_ID \
  --resource-type "cloudflare_record"

will contact the Cloudflare API on your behalf and result in a valid Terraform configuration representing the resource you requested:

resource "cloudflare_record" "terraform_managed_resource" {
  name = "example.com"
  proxied = false
  ttl = 120
  type = "A"
  value = "198.51.100.4"
  zone_id = "0da42c8d2132a9ddaf714f9e7c920711"
}

Prerequisites

• A Cloudflare account with resources defined (e.g. a few zones, some load balancers, spectrum applications, etc)
• A valid Cloudflare API key and sufficient permissions to access the resources you are requesting via the API
• An initialised Terraform directory (terraform init has run and providers installed). See the provider documentation if you have not yet setup the Terraform directory.

Installation

If you use Homebrew on MacOS, you can run the following:

$ brew tap cloudflare/cloudflare
$ brew install --cask cloudflare/cloudflare/cf-terraforming

If you use another OS, you will need to download the release directly from GitHub Releases.

Importing with Terraform state

cf-terraforming will output the terraform import compatible commands for you when you invoke the import command. This command assumes you have already ran cf-terraforming generate ... to output your resources.

In the future we aim to automate this however for now, it is a manual step to allow flexibility in directory structure.

$ cf-terraforming import \
  --resource-type "cloudflare_record" \
  --email $CLOUDFLARE_EMAIL \
  --key $CLOUDFLARE_API_KEY \
  --zone $CLOUDFLARE_ZONE_ID

Supported Resources

Any resources not listed are currently not supported.

Testing

To ensure changes don't introduce regressions this tool uses an automated test suite consisting of HTTP mocks via go-vcr and Terraform configuration files to assert against. The premise is that we mock the HTTP responses from the Cloudflare API to ensure we don't need to create and delete real resources to test. The Terraform files then allow us to build what the resource structure is expected to look like and once the tool parses the API response, we can compare that to the static file.

Updating VCR cassettes

Periodically, it is a good idea to recreate the VCR cassettes used in our testing to ensure they haven't drifted from actual responses. To do this, you will need to:

• Create the appropriate resource in a Cloudflare account/zone you have access to. This is required as overwriting cassettes makes real API requests on your behalf.
• Invoke the test suite with OVERWRITE_VCR_CASSETTES=true, CLOUDFLARE_DOMAIN=<real domain here>, authentication credentials (CLOUDFLARE_EMAIL, CLOUDFLARE_KEY, CLOUDFLARE_API_TOKEN) and the test you want to update. Example of updating the DNS CAA record test with a zone I own:

  $ OVERWRITE_VCR_CASSETTES=true \
    CLOUDFLARE_DOMAIN="terraform.cfapi.net" \
    CLOUDFLARE_EMAIL="[email protected]" \
    CLOUDFLARE_API_KEY="..." \
    TESTARGS="-run '^TestResourceGeneration/cloudflare_record_caa'"  \
    make test

• Commit your changes and push them via a Pull Request.