WIP

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

cmd/jpictl/env.go

@@ -16,19 +16,10 @@ var envCmd = &cobra.Command{
 			return err
 		}
 
-		_, err = m.Env(*envExport).WriteTo(os.Stdout)
-		return err
+		return m.WriteEnv(os.Stdout)
 	},
 }
 
-// Command Flags
-var (
-	envExport *bool
-)
-
 func init() {
 	rootCmd.AddCommand(envCmd)
-
-	envExport = envCmd.PersistentFlags().BoolP("export", "e", false,
-		"export generated variables")
 }

pkg/wireguard/config.go

@@ -23,16 +23,12 @@ var configTemplate = template.Must(template.New("config").Funcs(template.FuncMap
 		return strings.Join(s, sep)
 	},
 }).Parse(`[Interface]
-{{if .Interface.Name}}# Name: {{.Interface.Name}}
-{{end -}}
 Address = {{.Interface.Address}}
 PrivateKey = {{.Interface.PrivateKey}}
 ListenPort = {{.Interface.ListenPort}}
 {{- range .Peer }}
 
 [Peer]
-{{if .Name}}# Name: {{.Name}}
-{{end -}}
 PublicKey = {{.PublicKey}}
 Endpoint = {{.Endpoint}}
 AllowedIPs = {{ PrefixJoin .AllowedIPs ", "}}
@@ -68,7 +64,6 @@ func (f *Config) WriteTo(w io.Writer) (int64, error) {
 
 // InterfaceConfig represents the [Interface] section
 type InterfaceConfig struct {
-	Name       string
 	Address    netip.Addr
 	PrivateKey PrivateKey
 	ListenPort uint16
@@ -76,7 +71,6 @@ type InterfaceConfig struct {
 
 // PeerConfig represents a [Peer] section
 type PeerConfig struct {
-	Name       string
 	PublicKey  PublicKey
 	Endpoint   EndpointAddress
 	AllowedIPs []netip.Prefix

pkg/wireguard/keys.go

@@ -51,12 +51,12 @@ func (pub PublicKey) String() string {
 	}
 }
 
-// MarshalJSON encodes the key for JSON, omitting empty.
+// MarshalJSON encodes the key for JSON, omiting empty.
 func (key PrivateKey) MarshalJSON() ([]byte, error) {
 	return encodeKeyJSON(key.String())
 }
 
-// MarshalJSON encodes the key for JSON, omitting empty.
+// MarshalJSON encodes the key for JSON, omiting empty.
 func (pub PublicKey) MarshalJSON() ([]byte, error) {
 	return encodeKeyJSON(pub.String())
 }
@@ -70,12 +70,12 @@ func encodeKeyJSON(s string) ([]byte, error) {
 	return out, nil
 }
 
-// MarshalYAML encodes the key for YAML, omitting empty.
+// MarshalYAML encodes the key for YAML, omiting empty.
 func (key PrivateKey) MarshalYAML() (any, error) {
 	return encodeKeyYAML(key.String())
 }
 
-// MarshalYAML encodes the key for YAML, omitting empty.
+// MarshalYAML encodes the key for YAML, omiting empty.
 func (pub PublicKey) MarshalYAML() (any, error) {
 	return encodeKeyYAML(pub.String())
 }

pkg/zones/env.go

@@ -7,23 +7,8 @@ import (
 	"strings"
 )
 
-// Env is a shell environment factory for this cluster
-type Env struct {
-	ZoneIterator
-
-	export bool
-}
-
-// Env returns a shell environment factory
-func (m *Zones) Env(export bool) *Env {
-	return &Env{
-		ZoneIterator: m,
-		export:       export,
-	}
-}
-
-// WriteTo generates environment variables for shell scripts
-func (m *Env) WriteTo(w io.Writer) (int64, error) {
+// WriteEnv generates environment variables for shell scripts
+func (m *Zones) WriteEnv(w io.Writer) error {
 	var buf bytes.Buffer
 
 	m.writeEnvVarFn(&buf, genEnvZones, "ZONES")
@@ -32,10 +17,11 @@ func (m *Env) WriteTo(w io.Writer) (int64, error) {
 		return false
 	})
 
-	return buf.WriteTo(w)
+	_, err := buf.WriteTo(w)
+	return err
 }
 
-func (m *Env) writeEnvZone(w io.Writer, z *Zone) {
+func (m *Zones) writeEnvZone(w io.Writer, z *Zone) {
 	zoneID := z.ID
 
 	// ZONE{zoneID}
@@ -56,7 +42,7 @@ func (m *Env) writeEnvZone(w io.Writer, z *Zone) {
 	}
 }
 
-func (m *Env) writeEnvVarFn(w io.Writer, fn func(*Env) string, name string, args ...any) {
+func (m *Zones) writeEnvVarFn(w io.Writer, fn func(*Zones) string, name string, args ...any) {
 	var value string
 
 	if fn != nil {
@@ -66,13 +52,7 @@ func (m *Env) writeEnvVarFn(w io.Writer, fn func(*Env) string, name string, args
 	m.writeEnvVar(w, value, name, args...)
 }
 
-func (m *Env) writeEnvVar(w io.Writer, value string, name string, args ...any) {
-	var prefix string
-
-	if m.export {
-		prefix = "export "
-	}
-
+func (*Zones) writeEnvVar(w io.Writer, value string, name string, args ...any) {
 	if len(args) > 0 {
 		name = fmt.Sprintf(name, args...)
 	}
@@ -80,17 +60,15 @@ func (m *Env) writeEnvVar(w io.Writer, value string, name string, args ...any) {
 	if name != "" {
 		value = strings.TrimSpace(value)
 
-		_, _ = fmt.Fprintf(w, "%s%s=%q\n", prefix, name, value)
+		_, _ = fmt.Fprintf(w, "%s=%q\n", name, value)
 	}
 }
 
-func genEnvZones(m *Env) string {
-	var s []string
-
-	m.ForEachZone(func(z *Zone) bool {
+func genEnvZones(m *Zones) string {
+	s := make([]string, 0, len(m.Zones))
+	for _, z := range m.Zones {
 		s = append(s, fmt.Sprintf("%v", z.ID))
-		return false
-	})
+	}
 
 	return strings.Join(s, " ")
 }

pkg/zones/machine_rings.go

@@ -3,6 +3,7 @@ package zones
 import (
 	"bytes"
 	"fmt"
+	"io/fs"
 	"os"
 
 	"darvaza.org/core"
@@ -72,6 +73,38 @@ func (m *Machine) tryReadWireguardKeys(ring int) error {
 	}
 }
 
+// WriteWireguardKeys writes the wgN.key/wgN.pub files
+func (m *Machine) WriteWireguardKeys(ring int) error {
+	var err error
+	var key, pub string
+	var ri *RingInfo
+
+	ri, _ = m.getRingInfo(ring)
+	if ri != nil {
+		key = ri.Keys.PrivateKey.String()
+		pub = ri.Keys.PublicKey.String()
+	}
+
+	switch {
+	case key == "":
+		return fs.ErrNotExist
+	case pub == "":
+		pub = ri.Keys.PrivateKey.Public().String()
+	}
+
+	err = m.WriteStringFile(key+"\n", "wg%v.key", ring)
+	if err != nil {
+		return err
+	}
+
+	err = m.WriteStringFile(pub+"\n", "wg%v.pub", ring)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
 // RemoveWireguardKeys deletes wgN.key and wgN.pub from
 // the machine's config directory
 func (m *Machine) RemoveWireguardKeys(ring int) error {
@@ -229,6 +262,38 @@ func (m *Machine) RemoveWireguardConfig(ring int) error {
 	return err
 }
 
+// SyncWireguardConfig updates all wgN.conf files for the specified
+// ring
+func (m *Machine) SyncWireguardConfig(ring int) error {
+	return m.zone.SyncWireguardConfig(ring)
+}
+
+// WriteWireguardConfig ...
+func (m *Machine) WriteWireguardConfig(ring int) error {
+	r, err := NewRing(m.zone, ring)
+	if err != nil {
+		return err
+	}
+
+	return m.writeWireguardRingConfig(r)
+}
+
+func (m *Machine) writeWireguardRingConfig(r *Ring) error {
+	wg, err := r.ExportConfig(m)
+	if err != nil {
+		return nil
+	}
+
+	f, err := m.CreateTruncFile("wg%v.conf", r.ID)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	_, err = wg.WriteTo(f)
+	return err
+}
+
 func (m *Machine) createRingInfo(ring int, enabled bool) (*RingInfo, error) {
 	keys, err := wireguard.NewKeyPair()
 	if err != nil {

pkg/zones/rings.go

@@ -183,26 +183,32 @@ func RingOneAddress(zoneID, nodeID int) (netip.Addr, bool) {
 
 var (
 	_ MachineIterator = (*Ring)(nil)
-	_ ZoneIterator    = (*Ring)(nil)
 )
 
 // A Ring describes all peers on a ring
 type Ring struct {
 	RingAddressEncoder
-	ZoneIterator
 
 	Peers []*RingPeer
 }
 
 // AddPeer adds a [Machine] to the ring
 func (r *Ring) AddPeer(p *Machine) bool {
-	ri, ok := p.getRingInfo(r.ID)
+	_, ok := p.getRingInfo(r.ID)
 	if !ok {
 		return false
 	}
 
+	rp := r.newPeer(p)
+	r.Peers = append(r.Peers, rp)
+	return true
+}
+
+func (r *Ring) newPeer(p *Machine) *RingPeer {
 	nodeID := p.ID
 	zoneID := p.Zone()
+
+	ri, _ := p.getRingInfo(r.ID)
 	addr, _ := r.Encode(zoneID, nodeID)
 
 	rp := &RingPeer{
@@ -210,7 +216,6 @@ func (r *Ring) AddPeer(p *Machine) bool {
 		Address:    addr,
 		PrivateKey: ri.Keys.PrivateKey,
 		PeerConfig: wireguard.PeerConfig{
-			Name:      fmt.Sprintf("%s-%v", p.Name, r.ID),
 			PublicKey: ri.Keys.PublicKey,
 			Endpoint: wireguard.EndpointAddress{
 				Host: p.FullName(),
@@ -219,61 +224,20 @@ func (r *Ring) AddPeer(p *Machine) bool {
 		},
 	}
 
-	switch {
-	case r.ID == 0:
-		r.setRingZeroAllowedIPs(rp)
-	case p.IsGateway():
-		r.setRingOneGatewayAllowedIPs(rp)
-	default:
-		r.setRingOneNodeAllowedIPs(rp)
+	if r.ID == 0 {
+		rp.AllowRingOneNetwork(zoneID)
+		rp.AllowIP(addr)
+	} else {
+		rp.AllowIP(addr)
+
+		if p.IsGateway() {
+			zones := p.zone.zones
+			rp.AllowOtherRingOneNetworks(zones, zoneID)
+			rp.AllowRingZeroGateways(zones)
+		}
 	}
 
-	r.Peers = append(r.Peers, rp)
-	return true
-}
-
-func (r *Ring) setRingZeroAllowedIPs(rp *RingPeer) {
-	zoneID, _, _ := r.Decode(rp.Address)
-
-	// everyone on ring0 is a gateway to ring1
-	addr, _ := RingOneAddress(zoneID, 0)
-	rp.AllowCIDR(addr, 12)
-
-	// peer
-	rp.AllowCIDR(rp.Address, 32)
-}
-
-func (r *Ring) setRingOneGatewayAllowedIPs(rp *RingPeer) {
-	zoneID, _, _ := r.Decode(rp.Address)
-
-	// peer
-	rp.AllowCIDR(rp.Address, 32)
-
-	// ring1 gateways connect to all other ring1 networks
-	r.ForEachZone(func(z *Zone) bool {
-		if z.ID != zoneID {
-			addr, _ := r.Encode(z.ID, 0)
-			rp.AllowCIDR(addr, 12)
-		}
-		return false
-	})
-
-	// ring1 gateways also connect to all ring0 addresses
-	r.ForEachZone(func(z *Zone) bool {
-		z.ForEachMachine(func(p *Machine) bool {
-			if p.IsGateway() {
-				addr, _ := RingZeroAddress(z.ID, p.ID)
-				rp.AllowCIDR(addr, 32)
-			}
-			return false
-		})
-		return false
-	})
-}
-
-func (*Ring) setRingOneNodeAllowedIPs(rp *RingPeer) {
-	// only to the peer itself
-	rp.AllowCIDR(rp.Address, 32)
+	return rp
 }
 
 // ForEachMachine calls a function for each Machine in the ring
@@ -286,36 +250,38 @@ func (r *Ring) ForEachMachine(fn func(*Machine) bool) {
 	}
 }
 
-// ExportConfig builds a wgN.conf for the specified machine on the ring
+// ExportConfig ...
 func (r *Ring) ExportConfig(p *Machine) (*wireguard.Config, error) {
-	var found bool
+	cur, ok := r.getMachine(p)
+	if !ok {
+		return nil, fs.ErrNotExist
+	}
 
 	out := &wireguard.Config{
 		Interface: wireguard.InterfaceConfig{
+			Address:    cur.Address,
+			PrivateKey: cur.PrivateKey,
 			ListenPort: r.Port,
 		},
 	}
 
 	for _, pp := range r.Peers {
-		switch {
-		case pp.Node == p:
-			// current
-			found = true
-			out.Interface.Name = pp.PeerConfig.Name
-			out.Interface.Address = pp.Address
-			out.Interface.PrivateKey = pp.PrivateKey
-		default:
-			// peer
+		if pp.Node != p {
 			pc := pp.PeerConfig
 			out.Peer = append(out.Peer, pc)
 		}
 	}
+	return out, nil
+}
 
-	if !found {
-		return nil, fs.ErrNotExist
+func (r *Ring) getMachine(p *Machine) (*RingPeer, bool) {
+	for _, pp := range r.Peers {
+		if pp.Node == p {
+			return pp, true
+		}
 	}
 
-	return out, nil
+	return nil, false
 }
 
 // A RingPeer is a node on a [Ring]
@@ -327,17 +293,55 @@ type RingPeer struct {
 	PeerConfig wireguard.PeerConfig
 }
 
-// AllowCIDR allows an IP range via this peer
-func (rp *RingPeer) AllowCIDR(addr netip.Addr, bits int) {
-	cidr := netip.PrefixFrom(addr, bits)
-	rp.PeerConfig.AllowedIPs = append(rp.PeerConfig.AllowedIPs, cidr)
+// AllowIP ...
+func (rp *RingPeer) AllowIP(addr netip.Addr) {
+	rp.PeerConfig.AllowedIPs = append(rp.PeerConfig.AllowedIPs,
+		netip.PrefixFrom(addr, 32),
+	)
 }
 
-// NewRing composes a new Ring for Wireguard setup
-func NewRing(z ZoneIterator, m MachineIterator, ring int) (*Ring, error) {
+// AllowNetwork ...
+func (rp *RingPeer) AllowNetwork(addr netip.Addr, bits int) {
+	rp.PeerConfig.AllowedIPs = append(rp.PeerConfig.AllowedIPs,
+		netip.PrefixFrom(addr, bits),
+	)
+}
+
+// AllowRingOneNetwork ...
+func (rp *RingPeer) AllowRingOneNetwork(zoneID int) {
+	addr, _ := RingOneAddress(zoneID, 0)
+	rp.AllowNetwork(addr, 12)
+}
+
+// AllowOtherRingOneNetworks ...
+func (rp *RingPeer) AllowOtherRingOneNetworks(m *Zones, zoneID int) {
+	m.ForEachZone(func(z *Zone) bool {
+		if z.ID != zoneID {
+			addr, _ := RingOneAddress(z.ID, 0)
+			rp.AllowNetwork(addr, 12)
+		}
+		return false
+	})
+}
+
+// AllowRingZeroGateways ...
+func (rp *RingPeer) AllowRingZeroGateways(m *Zones) {
+	m.ForEachMachine(func(p *Machine) bool {
+		switch {
+		case !p.IsGateway():
+			// skip regular nodes
+		default:
+			addr, _ := RingZeroAddress(p.Zone(), p.ID)
+			rp.AllowIP(addr)
+		}
+		return false
+	})
+}
+
+// NewRing ...
+func NewRing(m MachineIterator, ring int) (*Ring, error) {
 	r := &Ring{
 		RingAddressEncoder: Rings[ring],
-		ZoneIterator:       z,
 	}
 
 	m.ForEachMachine(func(p *Machine) bool {

pkg/zones/wireguard.go

@@ -1,272 +0,0 @@
-package zones
-
-import (
-	"io/fs"
-	"os"
-)
-
-var (
-	_ WireguardConfigPruner = (*Zones)(nil)
-	_ WireguardConfigPruner = (*Zone)(nil)
-	_ WireguardConfigPruner = (*Machine)(nil)
-
-	_ WireguardConfigWriter = (*Zones)(nil)
-	_ WireguardConfigWriter = (*Zone)(nil)
-	_ WireguardConfigWriter = (*Machine)(nil)
-
-	_ WireguardConfigSyncer = (*Zones)(nil)
-	_ WireguardConfigSyncer = (*Zone)(nil)
-	_ WireguardConfigSyncer = (*Machine)(nil)
-
-	_ WireguardKeysWriter = (*Zones)(nil)
-	_ WireguardKeysWriter = (*Zone)(nil)
-	_ WireguardKeysWriter = (*Machine)(nil)
-)
-
-// A WireguardConfigPruner deletes wgN.conf on all machines under
-// its scope with the specified ring disabled
-type WireguardConfigPruner interface {
-	PruneWireguardConfig(ring int) error
-}
-
-// PruneWireguardConfig removes wgN.conf files of machines with
-// the corresponding ring disabled on all zones
-func (m *Zones) PruneWireguardConfig(ring int) error {
-	return pruneWireguardConfig(m, ring)
-}
-
-// PruneWireguardConfig removes wgN.conf files of machines with
-// the corresponding ring disabled.
-func (z *Zone) PruneWireguardConfig(ring int) error {
-	return pruneWireguardConfig(z, ring)
-}
-
-func pruneWireguardConfig(m MachineIterator, ring int) error {
-	var err error
-
-	m.ForEachMachine(func(p *Machine) bool {
-		err = p.PruneWireguardConfig(ring)
-		if os.IsNotExist(err) {
-			// ignore
-			err = nil
-		}
-
-		return err != nil
-	})
-
-	return err
-}
-
-// PruneWireguardConfig deletes the wgN.conf file if its
-// presence on the ring is disabled
-func (m *Machine) PruneWireguardConfig(ring int) error {
-	_, ok := m.getRingInfo(ring)
-	if !ok {
-		return m.RemoveWireguardConfig(ring)
-	}
-
-	return nil
-}
-
-// A WireguardConfigWriter rewrites all wgN.conf on all machines under
-// its scope attached to that ring
-type WireguardConfigWriter interface {
-	WriteWireguardConfig(ring int) error
-}
-
-// WriteWireguardConfig rewrites all wgN.conf on all machines
-// attached to that ring
-func (m *Zones) WriteWireguardConfig(ring int) error {
-	switch ring {
-	case 0:
-		return writeWireguardConfig(m, m, ring)
-	case 1:
-		var err error
-		m.ForEachZone(func(z *Zone) bool {
-			err = writeWireguardConfig(m, z, ring)
-			return err != nil
-		})
-		return err
-	default:
-		return fs.ErrInvalid
-	}
-}
-
-// WriteWireguardConfig rewrites all wgN.conf on all machines
-// on the Zone attached to that ring
-func (z *Zone) WriteWireguardConfig(ring int) error {
-	switch ring {
-	case 0:
-		return writeWireguardConfig(z.zones, z.zones, ring)
-	case 1:
-		return writeWireguardConfig(z.zones, z, ring)
-	default:
-		return fs.ErrInvalid
-	}
-}
-
-func writeWireguardConfig(z ZoneIterator, m MachineIterator, ring int) error {
-	r, err := NewRing(z, m, ring)
-	if err != nil {
-		return err
-	}
-
-	r.ForEachMachine(func(p *Machine) bool {
-		err = p.writeWireguardRingConfig(r)
-		return err != nil
-	})
-
-	return err
-}
-
-// WriteWireguardConfig rewrites the wgN.conf file of this Machine
-// if enabled
-func (m *Machine) WriteWireguardConfig(ring int) error {
-	r, err := NewRing(m.zone.zones, m.zone, ring)
-	if err != nil {
-		return err
-	}
-
-	return m.writeWireguardRingConfig(r)
-}
-
-func (m *Machine) writeWireguardRingConfig(r *Ring) error {
-	wg, err := r.ExportConfig(m)
-	if err != nil {
-		return nil
-	}
-
-	f, err := m.CreateTruncFile("wg%v.conf", r.ID)
-	if err != nil {
-		return err
-	}
-	defer f.Close()
-
-	_, err = wg.WriteTo(f)
-	return err
-}
-
-// A WireguardConfigSyncer updates all wgN.conf on all machines under
-// its scope reflecting the state of the ring
-type WireguardConfigSyncer interface {
-	SyncWireguardConfig(ring int) error
-}
-
-// SyncWireguardConfig updates all wgN.conf files for the specified
-// ring
-func (m *Zones) SyncWireguardConfig(ring int) error {
-	switch ring {
-	case 0:
-		return syncWireguardConfig(m, m, ring)
-	case 1:
-		var err error
-		m.ForEachZone(func(z *Zone) bool {
-			err = syncWireguardConfig(m, z, ring)
-			return err != nil
-		})
-		return err
-	default:
-		return fs.ErrInvalid
-	}
-}
-
-// SyncWireguardConfig updates all wgN.conf files for the specified
-// ring
-func (z *Zone) SyncWireguardConfig(ring int) error {
-	switch ring {
-	case 0:
-		return syncWireguardConfig(z.zones, z.zones, ring)
-	case 1:
-		return syncWireguardConfig(z.zones, z, ring)
-	default:
-		return fs.ErrInvalid
-	}
-}
-
-func syncWireguardConfig(z ZoneIterator, m MachineIterator, ring int) error {
-	r, err := NewRing(z, m, ring)
-	if err != nil {
-		return err
-	}
-
-	r.ForEachMachine(func(p *Machine) bool {
-		if _, ok := p.getRingInfo(ring); ok {
-			err = p.writeWireguardRingConfig(r)
-		} else {
-			err = p.RemoveWireguardConfig(ring)
-		}
-		return err != nil
-	})
-
-	return err
-}
-
-// SyncWireguardConfig updates all wgN.conf files for the specified
-// ring
-func (m *Machine) SyncWireguardConfig(ring int) error {
-	return m.zone.SyncWireguardConfig(ring)
-}
-
-// A WireguardKeysWriter writes the Wireguard Keys for all machines
-// under its scope for the specified ring
-type WireguardKeysWriter interface {
-	WriteWireguardKeys(ring int) error
-}
-
-// WriteWireguardKeys rewrites all wgN.{key,pub} files
-func (m *Zones) WriteWireguardKeys(ring int) error {
-	return writeWireguardKeys(m, ring)
-}
-
-// WriteWireguardKeys rewrites all wgN.{key,pub} files on this zone
-func (z *Zone) WriteWireguardKeys(ring int) error {
-	return writeWireguardKeys(z, ring)
-}
-
-func writeWireguardKeys(m MachineIterator, ring int) error {
-	var err error
-
-	m.ForEachMachine(func(p *Machine) bool {
-		err = p.WriteWireguardKeys(ring)
-		if os.IsNotExist(err) {
-			// ignore
-			err = nil
-		}
-
-		return err != nil
-	})
-
-	return err
-}
-
-// WriteWireguardKeys writes the wgN.key/wgN.pub files
-func (m *Machine) WriteWireguardKeys(ring int) error {
-	var err error
-	var key, pub string
-	var ri *RingInfo
-
-	ri, _ = m.getRingInfo(ring)
-	if ri != nil {
-		key = ri.Keys.PrivateKey.String()
-		pub = ri.Keys.PublicKey.String()
-	}
-
-	switch {
-	case key == "":
-		return fs.ErrNotExist
-	case pub == "":
-		pub = ri.Keys.PrivateKey.Public().String()
-	}
-
-	err = m.WriteStringFile(key+"\n", "wg%v.key", ring)
-	if err != nil {
-		return err
-	}
-
-	err = m.WriteStringFile(pub+"\n", "wg%v.pub", ring)
-	if err != nil {
-		return err
-	}
-
-	return nil
-}

pkg/zones/zone_rings.go

@@ -0,0 +1,121 @@
+package zones
+
+import (
+	"io/fs"
+	"os"
+)
+
+var (
+	_ machineRinger = (*Zone)(nil)
+	_ machineRinger = (*Zones)(nil)
+)
+
+type machineRinger interface {
+	MachineIterator
+
+	PruneWireguardConfig(ring int) error
+}
+
+// SyncWireguardConfig updates all wgN.conf files for the specified
+// ring
+func (z *Zone) SyncWireguardConfig(ring int) error {
+	switch ring {
+	case 0:
+		return syncWireguardConfig(z.zones, ring)
+	case 1:
+		return syncWireguardConfig(z, ring)
+	default:
+		return fs.ErrInvalid
+	}
+}
+
+// PruneWireguardConfig removes wgN.conf files of machines with
+// the corresponding ring disabled.
+func (z *Zone) PruneWireguardConfig(ring int) error {
+	return pruneWireguardConfig(z, ring)
+}
+
+// WriteWireguardKeys rewrites all wgN.{key,pub} files on this zone
+func (z *Zone) WriteWireguardKeys(ring int) error {
+	return writeWireguardKeys(z, ring)
+}
+
+// SyncWireguardConfig updates all wgN.conf files for the specified
+// ring
+func (m *Zones) SyncWireguardConfig(ring int) error {
+	switch ring {
+	case 0:
+		return syncWireguardConfig(m, ring)
+	case 1:
+		var err error
+		m.ForEachZone(func(z *Zone) bool {
+			err = syncWireguardConfig(z, ring)
+			return err != nil
+		})
+		return err
+	default:
+		return fs.ErrInvalid
+	}
+}
+
+// PruneWireguardConfig removes wgN.conf files of machines with
+// the corresponding ring disabled on all zones
+func (m *Zones) PruneWireguardConfig(ring int) error {
+	return pruneWireguardConfig(m, ring)
+}
+
+// WriteWireguardKeys rewrites all wgN.{key,pub} files
+func (m *Zones) WriteWireguardKeys(ring int) error {
+	return writeWireguardKeys(m, ring)
+}
+
+func syncWireguardConfig(m machineRinger, ring int) error {
+	err := m.PruneWireguardConfig(ring)
+	if err != nil {
+		return err
+	}
+
+	r, err := NewRing(m, ring)
+	if err != nil {
+		return err
+	}
+
+	m.ForEachMachine(func(p *Machine) bool {
+		if _, ok := p.getRingInfo(ring); ok {
+			err = p.writeWireguardRingConfig(r)
+		}
+		return err != nil
+	})
+
+	return err
+}
+
+func pruneWireguardConfig(m MachineIterator, ring int) error {
+	var err error
+
+	m.ForEachMachine(func(p *Machine) bool {
+		_, ok := p.getRingInfo(ring)
+		if !ok {
+			err = p.RemoveWireguardConfig(ring)
+		}
+		return err != nil
+	})
+
+	return err
+}
+
+func writeWireguardKeys(m MachineIterator, ring int) error {
+	var err error
+
+	m.ForEachMachine(func(p *Machine) bool {
+		err = p.WriteWireguardKeys(ring)
+		if os.IsNotExist(err) {
+			// ignore
+			err = nil
+		}
+
+		return err != nil
+	})
+
+	return err
+}

pkg/zones/zones.go

@@ -13,7 +13,6 @@ import (
 var (
 	_ MachineIterator = (*Zone)(nil)
 	_ MachineIterator = (*Zones)(nil)
-	_ ZoneIterator    = (*Zones)(nil)
 )
 
 // A MachineIterator is a set of Machines we can iterate on
@@ -21,11 +20,6 @@ type MachineIterator interface {
 	ForEachMachine(func(*Machine) bool)
 }
 
-// A ZoneIterator is a set of Zones we can iterate on
-type ZoneIterator interface {
-	ForEachZone(func(*Zone) bool)
-}
-
 // Zone represents one zone in a cluster
 type Zone struct {
 	zones *Zones