ibmcloud: add support for subdomains (#1779)

Co-authored-by: Ludovic Fernandez <[email protected]>

Author: thomasmhofmann

providers/dns/ibmcloud/internal/wrapper.go

@@ -2,6 +2,7 @@ package internal
 
 import (
 	"fmt"
+	"strings"
 
 	"github.com/softlayer/softlayer-go/datatypes"
 	"github.com/softlayer/softlayer-go/services"
@@ -66,7 +67,16 @@ func getDomainID(service services.Dns_Domain, domain string) (*int, error) {
 		return r.Id, nil
 	}
 
-	return nil, fmt.Errorf("no data found of domain: %s", domain)
+	// The domain was not found by name.
+	// For subdomains this is not unusual in softlayer.
+	// So in case a subdomain like `sub.toplevel.tld` was used try again using the parent domain
+	// (strip the first part in the domain string -> `toplevel.tld`).
+	_, parent, found := strings.Cut(domain, ".")
+	if !found || !strings.Contains(parent, ".") {
+		return nil, fmt.Errorf("no data found for domain: %s", domain)
+	}
+
+	return getDomainID(service, parent)
 }
 
 func findTxtRecords(service services.Dns_Domain, fqdn string) ([]datatypes.Dns_Domain_ResourceRecord, error) {