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update auth docs (#1587)
* Added a link to the console page where you can download a file * Removed instructions on how to get to that page, since now you can just click on the link * Added caveat for application default credentials @sethvargo @theacodes @kimcam let me know if this seems reasonable / you have any suggestions!
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@ -35,8 +35,9 @@ resource "google_compute_instance" "default" {
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The following keys can be used to configure the provider.
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* `credentials` - (Optional) Contents of a file that contains your service
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account private key in JSON format. You can download this file from the
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Google Cloud Console. More details on retrieving this file are below.
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account private key in JSON format. You can download your existing
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[Google Cloud service account file]
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from the Google Cloud Console, or you can create a new one from the same page.
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Credentials can also be specified using any of the following environment
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variables (listed in order of precedence):
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@ -45,20 +46,21 @@ The following keys can be used to configure the provider.
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* `GOOGLE_CLOUD_KEYFILE_JSON`
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* `GCLOUD_KEYFILE_JSON`
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The [`GOOGLE_APPLICATION_CREDENTIALS`](https://developers.google.com/identity/protocols/application-default-credentials#howtheywork)
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The [`GOOGLE_APPLICATION_CREDENTIALS`][adc]
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environment variable can also contain the path of a file to obtain credentials
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from.
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If no credentials are specified, the provider will fall back to using the
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[Google Application Default
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Credentials](https://developers.google.com/identity/protocols/application-default-credentials).
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[Google Application Default Credentials][adc].
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If you are running Terraform from a GCE instance, see [Creating and Enabling
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Service Accounts for
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Instances](https://cloud.google.com/compute/docs/authentication) for
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details. On your computer, if you have made your identity available as the
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Service Accounts for Instances][gce-service-account] for details.
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On your computer, if you have made your identity available as the
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Application Default Credentials by running [`gcloud auth application-default
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login`](https://cloud.google.com/sdk/gcloud/reference/auth/application-default/login),
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the provider will use your identity.
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login`][gcloud adc], the provider will use your identity.
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~> **Warning:** The gcloud method is not guaranteed to work for all APIs, and
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[service accounts] or [GCE metadata] should be used if possible.
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* `project` - (Optional) The ID of the project to apply any resources to. This
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can also be specified using any of the following environment variables (listed
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@ -85,25 +87,6 @@ The following keys can be used to configure the provider.
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* `GCLOUD_ZONE`
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* `CLOUDSDK_COMPUTE_ZONE`
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## Authentication JSON File
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Authenticating with Google Cloud services requires a JSON
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file which we call the _account file_.
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This file is downloaded directly from the
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[Google Developers Console](https://console.developers.google.com). To make
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the process more straightforwarded, it is documented here:
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1. Log into the [Google Developers Console](https://console.developers.google.com)
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and select a project.
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2. The API Manager view should be selected, click on "Credentials" on the left,
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then "Create credentials", and finally "Service account key".
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3. Select "Compute Engine default service account" in the "Service account"
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dropdown, and select "JSON" as the key type.
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4. Clicking "Create" will download your `credentials`.
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## Beta Features
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@ -115,3 +98,10 @@ is publicly announced, and is when they generally become publicly available.
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Terraform resources that support beta features will always use the Beta APIs to provision
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the resource. Importing a resource that supports beta features will always import those
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features, even if the resource was created in a matter that was not explicitly beta.
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[Google Cloud service account file]: https://console.cloud.google.com/apis/credentials/serviceaccountkey
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[adc]: https://cloud.google.com/docs/authentication/production
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[gce-service-account]: https://cloud.google.com/compute/docs/authentication
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[gcloud adc]: https://cloud.google.com/sdk/gcloud/reference/auth/application-default/login
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[service accounts]: https://cloud.google.com/docs/authentication/getting-started
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[GCE metadata]: https://cloud.google.com/docs/authentication/production#obtaining_credentials_on_compute_engine_kubernetes_engine_app_engine_flexible_environment_and_cloud_functions
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