zones: WIP

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

pkg/zones/env.go

@@ -31,25 +31,7 @@ func (m *Zones) writeEnvZone(w io.Writer, z *Zone) {
 	m.writeEnvVar(w, z.Name, "ZONE%v_%s", zoneID, "NAME")
 
 	// ZONE{zoneID}_GW
-	firstNodeID := 0
+	gatewayID := getRingZeroGatewayID(z)
-	gatewayID := 0
-	z.ForEachMachine(func(p *Machine) bool {
-		nodeID := p.ID()
-
-		if firstNodeID == 0 {
-			firstNodeID = nodeID
-		}
-
-		if _, found := p.getRingInfo(0); found {
-			gatewayID = nodeID
-		}
-
-		return gatewayID != 0
-	})
-
-	if gatewayID == 0 {
-		gatewayID = firstNodeID
-	}
 	m.writeEnvVar(w, fmt.Sprintf("%v", gatewayID), "ZONE%v_%s", zoneID, "GW")
 
 	// ZONE{zoneID}_IP
@@ -95,3 +77,28 @@ func genEnvZoneNodes(z *Zone) string {
 	}
 	return strings.Join(s, " ")
 }
+
+func getRingZeroGatewayID(z *Zone) int {
+	var firstNodeID, gatewayID int
+
+	z.ForEachMachine(func(p *Machine) bool {
+		nodeID := p.ID()
+
+		if firstNodeID == 0 {
+			firstNodeID = nodeID
+		}
+
+		if p.Gateway() {
+			gatewayID = nodeID
+		}
+
+		return gatewayID != 0
+	})
+
+	switch {
+	case gatewayID == 0:
+		return firstNodeID
+	default:
+		return gatewayID
+	}
+}

pkg/zones/machine.go

@@ -47,6 +47,34 @@ func (m *Machine) ID() int {
 	return m.id
 }
 
+// Gateway tells if the Machine is a ring0 gateway
+func (m *Machine) Gateway() bool {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	if ri, found := m.getRingInfo(0); found {
+		return ri.Enabled
+	}
+
+	return false
+}
+
+func (m *Machine) SetGateway(enable bool) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	ri, found := m.getRingInfo(0)
+	switch {
+	case !found && !enable:
+		return nil
+	case !found:
+		return m.createRingInfo(0, true)
+	default:
+		ri.Enabled = enable
+		return nil
+	}
+}
+
 // FullName returns the Name of the machine including domain name
 func (m *Machine) FullName() string {
 	if domain := m.zone.zones.domain; domain != "" {

pkg/zones/machine_rings.go

@@ -134,3 +134,18 @@ func (m *Machine) applyZoneNodeID(zoneID, nodeID int) error {
 
 	return nil
 }
+
+func (m *Machine) createRingInfo(ring int, enabled bool) error {
+	keys, err := wireguard.NewKeyPair()
+	if err != nil {
+		return err
+	}
+
+	ri := &RingInfo{
+		Ring:    ring,
+		Enabled: enabled,
+		Keys:    keys,
+	}
+
+	return m.applyRingInfo(ring, ri)
+}