f-21: code: change from ip to interface type

Signed-off-by: GnomeZworc <nicolas.boufidjeline@g3e.fr>

cmd/agent/main.go

@@ -36,7 +36,7 @@ func main() {
 	apiAddr := fmt.Sprintf("%s:%d", cfg.Api.Address, cfg.Api.Port)
 	promAddr := fmt.Sprintf("%s:%d", cfg.Prometheus.Address, cfg.Prometheus.Port)
 
-	d := dispatcher.New(q, db)
+	d := dispatcher.New(q, db, cfg.Interfaces)
 	go agentapi.New(d, db).Start(apiAddr)
 	go promserver.Start(promAddr, registry)
 

internal/api/agent/models.go

@@ -13,7 +13,7 @@ type SubnetCreateRequest struct {
 	Name      string `json:"name"`
 	VPC       string `json:"vpc"`
 	VxlanID   int    `json:"vxlan_id"`
-	LocalIP   string `json:"local_ip"`
+	IfaceType string `json:"iface_type"`
 	GatewayIP string `json:"gateway_ip"`
 	CIDR      string `json:"cidr"`
 }
@@ -23,7 +23,7 @@ type Subnet struct {
 	State      string `json:"state"`
 	VPC        string `json:"vpc"`
 	VxlanID    int    `json:"vxlan_id"`
-	LocalIP   string `json:"local_ip"`
+	LocalIface string `json:"local_iface"`
 	GatewayIP  string `json:"gateway_ip"`
 	CIDR       string `json:"cidr"`
 }

internal/api/agent/subnets.go

@@ -31,16 +31,16 @@ func (s *Server) postSubnet(w http.ResponseWriter, r *http.Request) {
 		json.NewEncoder(w).Encode(ErrorResponse{Error: "invalid request body"})
 		return
 	}
-	if req.Name == "" || req.VPC == "" || req.LocalIP == "" || req.GatewayIP == "" || req.CIDR == "" {
+	if req.Name == "" || req.VPC == "" || req.IfaceType == "" || req.GatewayIP == "" || req.CIDR == "" {
 		w.WriteHeader(http.StatusBadRequest)
-		json.NewEncoder(w).Encode(ErrorResponse{Error: "name, vpc, local_ip, gateway_ip and cidr are required"})
+		json.NewEncoder(w).Encode(ErrorResponse{Error: "name, vpc, iface_type, gateway_ip and cidr are required"})
 		return
 	}
 	s.dispatcher.Dispatch(dispatcher.CreateSubnetCommand{
 		Name:      req.Name,
 		VPC:       req.VPC,
 		VxlanID:   req.VxlanID,
-		LocalIP:   req.LocalIP,
+		IfaceType: req.IfaceType,
 		GatewayIP: req.GatewayIP,
 		CIDR:      req.CIDR,
 	})
@@ -50,9 +50,7 @@ func (s *Server) postSubnet(w http.ResponseWriter, r *http.Request) {
 		State:     "creating",
 		VPC:       req.VPC,
 		VxlanID:   req.VxlanID,
-		LocalIP:   req.LocalIP,
 		GatewayIP: req.GatewayIP,
 		CIDR:      req.CIDR,
 	})
 }
-

internal/dispatcher/dispatcher.go

@@ -8,21 +8,22 @@ import (
 )
 
 type Command interface {
-	Execute(db *badger.DB) error
+	Execute(db *badger.DB, interfaces map[string]string) error
 }
 
 type Dispatcher struct {
 	queue      *worker.Queue
 	db         *badger.DB
+	interfaces map[string]string
 }
 
-func New(queue *worker.Queue, db *badger.DB) *Dispatcher {
+func New(queue *worker.Queue, db *badger.DB, interfaces map[string]string) *Dispatcher {
-	return &Dispatcher{queue: queue, db: db}
+	return &Dispatcher{queue: queue, db: db, interfaces: interfaces}
 }
 
 func (d *Dispatcher) Dispatch(cmd Command) {
 	d.queue.Submit(func() {
-		if err := cmd.Execute(d.db); err != nil {
+		if err := cmd.Execute(d.db, d.interfaces); err != nil {
 			log.Printf("command error (%T): %v", cmd, err)
 		}
 	})

internal/dispatcher/subnet_commands.go

@@ -14,16 +14,20 @@ type CreateSubnetCommand struct {
 	Name      string
 	VPC       string
 	VxlanID   int
-	LocalIP   string
+	IfaceType string
 	GatewayIP string
 	CIDR      string
 }
 
-func (c CreateSubnetCommand) Execute(db *badger.DB) error {
+func (c CreateSubnetCommand) Execute(db *badger.DB, interfaces map[string]string) error {
+	localIface, ok := interfaces[c.IfaceType]
+	if !ok {
+		return fmt.Errorf("unknown iface_type %q: not found in config", c.IfaceType)
+	}
 	kv.AddInDB(db, "subnet/"+c.Name+"/state", "creating")
 	kv.AddInDB(db, "subnet/"+c.Name+"/vpc", c.VPC)
 	kv.AddInDB(db, "subnet/"+c.Name+"/vxlan_id", strconv.Itoa(c.VxlanID))
-	kv.AddInDB(db, "subnet/"+c.Name+"/local_ip", c.LocalIP)
+	kv.AddInDB(db, "subnet/"+c.Name+"/local_iface", localIface)
 	kv.AddInDB(db, "subnet/"+c.Name+"/gateway_ip", c.GatewayIP)
 	kv.AddInDB(db, "subnet/"+c.Name+"/cidr", c.CIDR)
 	return subnet.CreateSubnet(db, c.Name)
@@ -33,7 +37,7 @@ type DeleteSubnetCommand struct {
 	Name string
 }
 
-func (c DeleteSubnetCommand) Execute(db *badger.DB) error {
+func (c DeleteSubnetCommand) Execute(db *badger.DB, _ map[string]string) error {
 	kv.AddInDB(db, "subnet/"+c.Name+"/state", "deleting")
 	if err := subnet.DeleteSubnet(db, c.Name); err != nil {
 		fmt.Println(err)

internal/dispatcher/vpc_commands.go

@@ -10,7 +10,7 @@ type CreateVPCCommand struct {
 	Name string
 }
 
-func (c CreateVPCCommand) Execute(db *badger.DB) error {
+func (c CreateVPCCommand) Execute(db *badger.DB, _ map[string]string) error {
 	kv.AddInDB(db, "vpc/"+c.Name+"/state", "creating")
 	return vpc.CreateVPC(db, c.Name)
 }
@@ -19,7 +19,7 @@ type DeleteVPCCommand struct {
 	Name string
 }
 
-func (c DeleteVPCCommand) Execute(db *badger.DB) error {
+func (c DeleteVPCCommand) Execute(db *badger.DB, _ map[string]string) error {
 	kv.AddInDB(db, "vpc/"+c.Name+"/state", "deleting")
 	if err := vpc.DeleteVPC(db, c.Name); err != nil {
 		return err

internal/netif/vxlan.go

@@ -1,19 +1,21 @@
 package netif
 
 import (
-	"net"
-
 	"github.com/vishvananda/netlink"
 )
 
-func CreateVxlan(name string, vxlanID int, localIP net.IP) error {
+func CreateVxlan(name string, vxlanID int, localIface string) error {
+	link, err := netlink.LinkByName(localIface)
+	if err != nil {
+		return err
+	}
 	vxlan := &netlink.Vxlan{
 		LinkAttrs: netlink.LinkAttrs{
 			Name: name,
 		},
 		VxlanId:      vxlanID,
 		Port:         4789,
-		SrcAddr:  localIP,
+		VtepDevIndex: link.Attrs().Index,
 		Learning:     false,
 	}
 	return netlink.LinkAdd(vxlan)

internal/subnet/create.go

@@ -40,13 +40,9 @@ func CreateSubnet(db *badger.DB, subnetName string) error {
 		return fmt.Errorf("parse vxlan_id: %w", err)
 	}
 
-	localIPStr, err := kv.GetFromDB(db, "subnet/"+subnetName+"/local_ip")
+	localIface, err := kv.GetFromDB(db, "subnet/"+subnetName+"/local_iface")
 	if err != nil {
-		return fmt.Errorf("get local_ip: %w", err)
+		return fmt.Errorf("get local_iface: %w", err)
-	}
-	localIP := net.ParseIP(localIPStr)
-	if localIP == nil {
-		return fmt.Errorf("invalid local_ip: %s", localIPStr)
 	}
 
 	gatewayIPStr, err := kv.GetFromDB(db, "subnet/"+subnetName+"/gateway_ip")
@@ -90,7 +86,7 @@ func CreateSubnet(db *badger.DB, subnetName string) error {
 	}
 
 	// vxlan
-	if err := netif.CreateVxlan(vxlanIface, vxlanID, localIP); err != nil {
+	if err := netif.CreateVxlan(vxlanIface, vxlanID, localIface); err != nil {
 		return fmt.Errorf("create vxlan: %w", err)
 	}