zones: load wireguard key pairs on Machine.init()

Signed-off-by: Alejandro Mery <amery@jpi.io>

pkg/zones/machine_rings.go

@@ -61,6 +61,26 @@ func (m *Machine) GetWireguardKeys(ring int) (*wireguard.KeyPair, error) {
 	return kp, nil
 }
 
+func (m *Machine) tryReadWireguardKeys(ring int) error {
+	kp, err := m.GetWireguardKeys(ring)
+	switch {
+	case os.IsNotExist(err):
+		// ignore
+		return nil
+	case err != nil:
+		// something went wrong
+		return err
+	default:
+		// import keys
+		ri := &RingInfo{
+			Ring: ring,
+			Keys: kp,
+		}
+
+		return m.applyRingInfo(ring, ri)
+	}
+}
+
 // GetWireguardConfig reads a wgN.conf file
 func (m *Machine) GetWireguardConfig(ring int) (*wireguard.Config, error) {
 	data, err := m.ReadFile("wg%v.conf", ring)

pkg/zones/machine_scan.go

@@ -25,6 +25,15 @@ func (m *Machine) updatePublicAddresses() error {
 	return nil
 }
 
+func (m *Machine) init() error {
+	for i := 0; i < RingsCount; i++ {
+		if err := m.tryReadWireguardKeys(i); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
 func (m *Machine) scan() error {
 	for i := 0; i < RingsCount; i++ {
 		if err := m.tryApplyWireguardConfig(i); err != nil {

pkg/zones/scan.go

@@ -129,6 +129,10 @@ func (z *Zone) scan() error {
 				Name: e.Name(),
 			}
 
+			if err := m.init(); err != nil {
+				return err
+			}
+
 			z.Machines = append(z.Machines, m)
 		}
 	}