WIP

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

cmd/jpictl/config.go

@@ -1,7 +1,5 @@
 package main
 
-import "git.jpi.io/amery/jpictl/pkg/zones"
-
 // Config describes the repository
 type Config struct {
 	Base   string
@@ -12,8 +10,3 @@ var cfg = &Config{
 	Base:   "./m",
 	Domain: "m.jpi.cloud",
 }
-
-// LoadZones loads all zones and machines in the config directory
-func (cfg *Config) LoadZones() (*zones.Zones, error) {
-	return zones.New(cfg.Base, cfg.Domain)
-}

cmd/jpictl/dump.go

@@ -9,6 +9,8 @@ import (
 	"github.com/burntSushi/toml"
 	"github.com/spf13/cobra"
 	"gopkg.in/yaml.v3"
+
+	"git.jpi.io/amery/jpictl/pkg/zones"
 )
 
 // Encoder represents an object that encodes another internally
@@ -58,7 +60,7 @@ var dumpCmd = &cobra.Command{
 		var buf bytes.Buffer
 		var enc Encoder
 
-		m, err := cfg.LoadZones()
+		m, err := zones.New(cfg.Base, cfg.Domain)
 		if err != nil {
 			return err
 		}

cmd/jpictl/env.go

@@ -4,6 +4,8 @@ import (
 	"os"
 
 	"github.com/spf13/cobra"
+
+	"git.jpi.io/amery/jpictl/pkg/zones"
 )
 
 // Command
@@ -11,7 +13,7 @@ var envCmd = &cobra.Command{
 	Use:   "env",
 	Short: "generates environment variables for shell scripts",
 	RunE: func(_ *cobra.Command, _ []string) error {
-		m, err := cfg.LoadZones()
+		m, err := zones.New(cfg.Base, cfg.Domain)
 		if err != nil {
 			return err
 		}

cmd/jpictl/write.go

@@ -1,23 +0,0 @@
-package main
-
-import (
-	"github.com/spf13/cobra"
-)
-
-// Command
-var writeCmd = &cobra.Command{
-	Use:   "write",
-	Short: "rewrites all config files",
-	RunE: func(_ *cobra.Command, _ []string) error {
-		m, err := cfg.LoadZones()
-		if err != nil {
-			return err
-		}
-
-		return m.SyncAll()
-	},
-}
-
-func init() {
-	rootCmd.AddCommand(writeCmd)
-}

pkg/zones/env.go

@@ -32,11 +32,14 @@ func (m *Zones) writeEnvZone(w io.Writer, z *Zone) {
 
 	// ZONE{zoneID}_GW
 	gatewayID := getRingZeroGatewayID(z)
-	m.writeEnvVar(w, fmt.Sprintf("%v", gatewayID), "ZONE%v_%s", zoneID, "GW")
+	if gatewayID > 0 {
+		m.writeEnvVar(w, fmt.Sprintf("%v", gatewayID), "ZONE%v_%s", zoneID, "GW")
 
-	// ZONE{zoneID}_IP
+		// ZONE{zoneID}_IP
-	ip, _ := RingZeroAddress(zoneID, gatewayID)
+		if ip, ok := RingZeroAddress(zoneID, gatewayID); ok {
-	m.writeEnvVar(w, ip.String(), "ZONE%v_%s", zoneID, "IP")
+			m.writeEnvVar(w, ip.String(), "ZONE%v_%s", zoneID, "IP")
+		}
+	}
 }
 
 func (m *Zones) writeEnvVarFn(w io.Writer, fn func(*Zones) string, name string, args ...any) {
@@ -79,13 +82,9 @@ func genEnvZoneNodes(z *Zone) string {
 }
 
 func getRingZeroGatewayID(z *Zone) int {
-	var firstNodeID, gatewayID int
+	var gatewayID int
 
 	z.ForEachMachine(func(p *Machine) bool {
-		if firstNodeID == 0 {
-			firstNodeID = p.ID
-		}
-
 		if p.IsGateway() {
 			gatewayID = p.ID
 		}
@@ -93,10 +92,5 @@ func getRingZeroGatewayID(z *Zone) int {
 		return gatewayID != 0
 	})
 
-	switch {
+	return gatewayID
-	case gatewayID == 0:
-		return firstNodeID
-	default:
-		return gatewayID
-	}
 }

pkg/zones/machine.go

@@ -43,6 +43,24 @@ func (m *Machine) IsGateway() bool {
 	return ok
 }
 
+// SetGateway enables/disables a Machine ring0 integration
+func (m *Machine) SetGateway(enabled bool) error {
+	ri, found := m.getRingInfo(0)
+	switch {
+	case !found && !enabled:
+		return nil
+	case !found:
+		var err error
+
+		if ri, err = m.createRingInfo(0, false); err != nil {
+			return err
+		}
+	}
+
+	ri.Enabled = enabled
+	return m.syncRingConfig(0)
+}
+
 func (m *Machine) getPeerByName(name string) (*Machine, bool) {
 	return m.zone.zones.GetMachineByName(name)
 }

pkg/zones/machine_rings.go

@@ -92,12 +92,12 @@ func (m *Machine) WriteWireguardKeys(ring int) error {
 		pub = ri.Keys.PrivateKey.Public().String()
 	}
 
-	err = m.WriteStringFile(key+"\n", "wg%v.key", ring)
+	err = m.WriteStringFile(key, "wg%v.key", ring)
 	if err != nil {
 		return err
 	}
 
-	err = m.WriteStringFile(pub+"\n", "wg%v.pub", ring)
+	err = m.WriteStringFile(pub, "wg%v.pub", ring)
 	if err != nil {
 		return err
 	}
@@ -261,3 +261,57 @@ func (m *Machine) RemoveWireguardConfig(ring int) error {
 
 	return err
 }
+
+func (*Machine) syncRingConfig(_ int) error {
+	// _, err := m.getRingNodes(ring)
+	return nil
+}
+
+func (m *Machine) createRingInfo(ring int, enabled bool) (*RingInfo, error) {
+	keys, err := wireguard.NewKeyPair()
+	if err != nil {
+		return nil, err
+	}
+
+	ri := &RingInfo{
+		Ring:    ring,
+		Enabled: enabled,
+		Keys:    keys,
+	}
+
+	err = m.applyRingInfo(ring, ri)
+	if err != nil {
+		return nil, err
+	}
+
+	return ri, nil
+}
+
+func (m *Machine) writeRingInfo(ri *RingInfo) error {
+	var err error
+
+	if m == nil || ri == nil {
+		return fs.ErrInvalid
+	}
+
+	err = m.WriteWireguardKeys(ri.Ring)
+	if err != nil {
+		return err
+	}
+
+	if !ri.Enabled {
+		return m.RemoveWireguardConfig(ri.Ring)
+	}
+
+	return m.writeRingInfoConf(ri.Ring, ri.Keys.PrivateKey)
+}
+
+func (m *Machine) writeRingInfoConf(ring int, _ wireguard.PrivateKey) error {
+	f, err := m.CreateTruncFile("wg%v.conf", ring)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	return nil
+}

pkg/zones/scan.go

@@ -11,6 +11,7 @@ func (m *Zones) scan() error {
 		m.scanMachines,
 		m.scanZoneIDs,
 		m.scanSort,
+		m.scanGateways,
 	} {
 		if err := fn(); err != nil {
 			return err
@@ -115,6 +116,16 @@ func (m *Zones) scanSort() error {
 	return nil
 }
 
+func (m *Zones) scanGateways() error {
+	var err error
+
+	m.ForEachZone(func(z *Zone) bool {
+		_, _, err = z.GetGateway()
+		return err != nil
+	})
+	return err
+}
+
 func (z *Zone) scan() error {
 	// each directory is a machine
 	entries, err := fs.ReadDir(z.zones.dir, z.Name)
@@ -139,3 +150,41 @@ func (z *Zone) scan() error {
 
 	return nil
 }
+
+// GetGateway returns the first gateway found, if none
+// files will be created to enable the first [Machine] to
+// be one
+func (z *Zone) GetGateway() (*Machine, bool, error) {
+	var first *Machine
+	var gateway *Machine
+
+	z.zones.ForEachMachine(func(p *Machine) bool {
+		switch {
+		case p.IsGateway():
+			// found
+			gateway = p
+		case first == nil:
+			// remember
+			first = p
+		default:
+			// keep looking
+		}
+
+		return gateway != nil
+	})
+
+	switch {
+	case gateway != nil:
+		// found one
+		return gateway, false, nil
+	case first != nil:
+		// make one
+		if err := first.SetGateway(true); err != nil {
+			return first, false, err
+		}
+		return first, true, nil
+	default:
+		// Zone without nodes?
+		panic("unreachable")
+	}
+}

pkg/zones/sync.go

@@ -1,33 +0,0 @@
-package zones
-
-// SyncAll updates all config files
-func (m *Zones) SyncAll() error {
-	for _, fn := range []func() error{
-		m.SyncAllWireguard,
-	} {
-		if err := fn(); err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
-
-// SyncAllWireguard updates all wireguard config files
-func (m *Zones) SyncAllWireguard() error {
-	var err error
-
-	for ring := 0; ring < RingsCount; ring++ {
-		err = m.PruneWireguardConfig(ring)
-		if err != nil {
-			return err
-		}
-
-		err = m.WriteWireguardKeys(ring)
-		if err != nil {
-			return err
-		}
-	}
-
-	return nil
-}

pkg/zones/zone_rings.go

@@ -1,61 +0,0 @@
-package zones
-
-import "os"
-
-// PruneWireguardConfig removes wgN.conf files of machines with
-// the corresponding ring disabled.
-func (z *Zone) PruneWireguardConfig(ring int) error {
-	var err error
-
-	z.ForEachMachine(func(p *Machine) bool {
-		_, ok := p.getRingInfo(ring)
-		if !ok {
-			err = p.RemoveWireguardConfig(ring)
-		}
-		return err != nil
-	})
-
-	return err
-}
-
-// WriteWireguardKeys rewrites all wgN.{key,pub} files on this zone
-func (z *Zone) WriteWireguardKeys(ring int) error {
-	var err error
-
-	z.ForEachMachine(func(p *Machine) bool {
-		err = p.WriteWireguardKeys(ring)
-		if os.IsNotExist(err) {
-			// ignore
-			err = nil
-		}
-
-		return err != nil
-	})
-
-	return err
-}
-
-// PruneWireguardConfig removes wgN.conf files of machines with
-// the corresponding ring disabled on all zones
-func (m *Zones) PruneWireguardConfig(ring int) error {
-	var err error
-
-	m.ForEachZone(func(z *Zone) bool {
-		err = z.PruneWireguardConfig(ring)
-		return err != nil
-	})
-
-	return err
-}
-
-// WriteWireguardKeys rewrites all wgN.{key,pub} files
-func (m *Zones) WriteWireguardKeys(ring int) error {
-	var err error
-
-	m.ForEachZone(func(z *Zone) bool {
-		err = z.WriteWireguardKeys(ring)
-		return err != nil
-	})
-
-	return err
-}

pkg/zones/zones.go

@@ -34,6 +34,31 @@ func (z *Zone) ForEachMachine(fn func(*Machine) bool) {
 	}
 }
 
+// SetGateway configures a machine to be the zone's ring0 gateway
+func (z *Zone) SetGateway(gatewayID int, enabled bool) error {
+	var err error
+	var found bool
+
+	z.ForEachMachine(func(p *Machine) bool {
+		if p.ID == gatewayID {
+			found = true
+			err = p.SetGateway(enabled)
+
+			return true
+		}
+		return false
+	})
+
+	switch {
+	case err != nil:
+		return err
+	case !found:
+		return fs.ErrNotExist
+	default:
+		return nil
+	}
+}
+
 // Zones represents all zones in a cluster
 type Zones struct {
 	dir      fs.FS