Generation of certificates and keys for etcd gated if etcd is disabled.(

k3s-io#7945)

Problem:
When support for etcd was added in 3957142, generation of certificates and keys for etcd was not gated behind use of managed etcd.
Keys are generated and distributed across servers even if managed etcd is not enabled.

Solution:
Allow generation of certificates and keys only if managed etc is enabled. Check config.DisableETCD flag.

Signed-off-by: Bartossh <lenartconsulting@gmail.com>
Signed-off-by: Derek Nola <derek.nola@suse.com>
Co-authored-by: Bartosz Lenart <lenart.consulting@gmail.com>

pkg/daemons/control/deps/deps.go

@@ -446,6 +446,7 @@ func genServerCerts(config *config.Control) error {
 }
 
 func genETCDCerts(config *config.Control) error {
+
 	runtime := config.Runtime
 	regen, err := createSigningCertKey("etcd-server", runtime.ETCDServerCA, runtime.ETCDServerCAKey)
 	if err != nil {
@@ -455,13 +456,6 @@ func genETCDCerts(config *config.Control) error {
 	altNames := &certutil.AltNames{}
 	addSANs(altNames, config.SANs)
 
-	if _, err := createClientCertKey(regen, "etcd-server", nil,
-		altNames, []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth, x509.ExtKeyUsageClientAuth},
-		runtime.ETCDServerCA, runtime.ETCDServerCAKey,
-		runtime.ServerETCDCert, runtime.ServerETCDKey); err != nil {
-		return err
-	}
-
 	if _, err := createClientCertKey(regen, "etcd-client", nil,
 		nil, []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth},
 		runtime.ETCDServerCA, runtime.ETCDServerCAKey,
@@ -481,6 +475,17 @@ func genETCDCerts(config *config.Control) error {
 		return err
 	}
 
+	if config.DisableETCD {
+		return nil
+	}
+
+	if _, err := createClientCertKey(regen, "etcd-server", nil,
+		altNames, []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth, x509.ExtKeyUsageClientAuth},
+		runtime.ETCDServerCA, runtime.ETCDServerCAKey,
+		runtime.ServerETCDCert, runtime.ServerETCDKey); err != nil {
+		return err
+	}
+
 	return nil
 }