Handle non 200 codes while getting env metadata

client/fingerprint/env_aws.go

@@ -116,6 +116,10 @@ func (f *EnvAWSFingerprint) Fingerprint(cfg *config.Config, node *structs.Node)
 	}
 	for _, k := range keys {
 		res, err := client.Get(metadataURL + k)
+		if res.StatusCode != http.StatusOK {
+			f.logger.Printf("[WARN]: fingerprint.env_aws: Could not read value for attribute %q", k)
+			continue
+		}
 		if err != nil {
 			// if it's a URL error, assume we're not in an AWS environment
 			// TODO: better way to detect AWS? Check xen virtualization?

client/fingerprint/env_gce.go

@@ -94,7 +94,8 @@ func (f *EnvGCEFingerprint) Get(attribute string, recursive bool) (string, error
 	}
 
 	res, err := f.client.Do(req)
-	if err != nil {
+	if err != nil || res.StatusCode != http.StatusOK {
+		f.logger.Printf("[WARN]: fingerprint.env_gce: Could not read value for attribute %q", attribute)
 		return "", err
 	}