website/docs/commands: document TF_REGISTRY_DISCOVERY_RETRY

registry/client.go

@@ -368,6 +368,8 @@ func (c *Client) TerraformProviderLocation(provider *regsrc.TerraformProvider, v
 	return &loc, nil
 }
 
+// configureDiscoveryRetry configures the number of retries the registry client
+// will attempt for requests with retryable errors, like 502 status codes
 func configureDiscoveryRetry() {
 	discoveryRetry = defaultRetry
 

website/docs/commands/environment-variables.html.md

@@ -114,6 +114,12 @@ exact output differences can change between minor Terraform versions.
 
 For more details see [Running Terraform in Automation](https://learn.hashicorp.com/terraform/development/running-terraform-in-automation).
 
+## TF_REGISTRY_DISCOVERY_RETRY
+
+Set `TF_REGISTRY_DISCOVERY_RETRY` to configure the max number of request retries
+the remote registry client will attempt for client connection errors or
+500-range responses that are safe to retry.
+
 ## TF_CLI_CONFIG_FILE
 
 The location of the [Terraform CLI configuration file](/docs/commands/cli-config.html).