cluster: generate ring keys on scan if missing

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

pkg/cluster/machine_scan.go

@@ -68,7 +68,8 @@ func (m *Machine) setID() error {
 	return nil
 }
 
-func (m *Machine) scan(opts *ScanOptions) error {
+// scan is called once we know about all zones and machine names
+func (m *Machine) scan(_ *ScanOptions) error {
 	for i := 0; i < RingsCount; i++ {
 		if err := m.tryApplyWireguardConfig(i); err != nil {
 			m.error(err).
@@ -80,6 +81,22 @@ func (m *Machine) scan(opts *ScanOptions) error {
 		}
 	}
 
+	return nil
+}
+
+// scanWrapUp is called once all machines have been scanned
+func (m *Machine) scanWrapUp(opts *ScanOptions) error {
+	for _, ri := range m.Rings {
+		if err := m.setRingDefaults(ri); err != nil {
+			m.error(err).
+				WithField("subsystem", "wireguard").
+				WithField("node", m.Name).
+				WithField("ring", ri.Ring).
+				Print()
+			return err
+		}
+	}
+
 	if !opts.DontResolvePublicAddresses {
 		return m.UpdatePublicAddresses()
 	}