zones: WIP

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

pkg/zones/env.go

@@ -88,7 +88,7 @@ func getRingZeroGatewayID(z *Zone) int {
 			firstNodeID = nodeID
 		}
 
-		if _, found := p.getRingInfo(0); found {
+		if p.Gateway() {
 			gatewayID = nodeID
 		}
 

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

@@ -10,77 +10,6 @@ import (
 	"git.jpi.io/amery/jpictl/pkg/wireguard"
 )
 
-// GetWireguardKeys reads a wgN.key/wgN.pub files
-func (m *Machine) GetWireguardKeys(ring int) (*wireguard.KeyPair, error) {
-	var (
-		data []byte
-		err  error
-		key  wireguard.PrivateKey
-		pub  wireguard.PublicKey
-	)
-
-	data, err = m.ReadFile("wg%v.key", ring)
-	if err != nil {
-		// failed to read
-		return nil, err
-	}
-
-	key, err = wireguard.PrivateKeyFromBase64(string(data))
-	if err != nil {
-		// bad key
-		err = core.Wrapf(err, "wg%v.key", ring)
-		return nil, err
-	}
-
-	data, err = m.ReadFile("wg%v.pub", ring)
-	switch {
-	case os.IsNotExist(err):
-		// no wgN.pub is fine
-	case err != nil:
-		// failed to read
-		return nil, err
-	default:
-		// good read
-		pub, err = wireguard.PublicKeyFromBase64(string(data))
-		if err != nil {
-			// bad key
-			err = core.Wrapf(err, "wg%v.pub", ring)
-			return nil, err
-		}
-	}
-
-	kp := &wireguard.KeyPair{
-		PrivateKey: key,
-		PublicKey:  pub,
-	}
-
-	if err = kp.Validate(); err != nil {
-		return nil, err
-	}
-
-	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)
@@ -205,3 +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)
+}

pkg/zones/machine_scan.go

@@ -25,15 +25,6 @@ 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/rings.go

@@ -31,9 +31,9 @@ func (ri *RingInfo) Merge(alter *RingInfo) error {
 	case ri.Ring != alter.Ring:
 		// different ring
 		return fmt.Errorf("invalid %s: %v ≠ %v", "ring", ri.Ring, alter.Ring)
-	case ri.Enabled && !alter.Enabled:
+	case ri.Enabled != alter.Enabled:
-		// can't disable via Merge
+		// different state
-		return fmt.Errorf("invalid %s: %v → %v", "enabled", ri.Enabled, alter.Enabled)
+		return fmt.Errorf("invalid %s: %v ≠ %v", "enabled", ri.Enabled, alter.Enabled)
 	case !canMergeAddress(ri.Address, alter.Address):
 		// different address
 		return fmt.Errorf("invalid %s: %v ≠ %v", "address", ri.Address, alter.Address)
@@ -42,15 +42,6 @@ func (ri *RingInfo) Merge(alter *RingInfo) error {
 		return fmt.Errorf("invalid %s: %s ≠ %s", "keys", ri.Keys, alter.Keys)
 	}
 
-	return ri.unsafeMerge(alter)
-}
-
-func (ri *RingInfo) unsafeMerge(alter *RingInfo) error {
-	// enable via Merge
-	if alter.Enabled {
-		ri.Enabled = true
-	}
-
 	switch {
 	case ri.Keys == nil:
 		// assign keypair

pkg/zones/scan.go

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