f-25: vm: use db data to find mac address

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

internal/dhcp/db.go

@@ -0,0 +1,19 @@
+package dhcp
+
+import (
+	"git.g3e.fr/syonad/two/pkg/db/kv"
+	"github.com/dgraph-io/badger/v4"
+)
+
+func StoreDHCPEntries(db *badger.DB, subnetName string, entries map[string]string) error {
+	for ip, mac := range entries {
+		if err := kv.AddInDB(db, "subnet/"+subnetName+"/dhcp/"+ip, mac); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func GetMACForIP(db *badger.DB, subnetName, ip string) (string, error) {
+	return kv.GetFromDB(db, "subnet/"+subnetName+"/dhcp/"+ip)
+}

internal/dhcp/dhcp_test.go

@@ -61,7 +61,7 @@ func newConf(t *testing.T, cidr string) Config {
 
 func TestGenerateConfig_CreatesFile(t *testing.T) {
 	conf := newConf(t, "192.168.1.0/29") // 6 hôtes
-	path, err := GenerateConfig(conf)
+	path, _, err := GenerateConfig(conf)
 	if err != nil {
 		t.Fatalf("GenerateConfig a échoué : %v", err)
 	}
@@ -73,7 +73,7 @@ func TestGenerateConfig_CreatesFile(t *testing.T) {
 
 func TestGenerateConfig_FilenameMatchesName(t *testing.T) {
 	conf := newConf(t, "192.168.1.0/29")
-	path, err := GenerateConfig(conf)
+	path, _, err := GenerateConfig(conf)
 	if err != nil {
 		t.Fatalf("GenerateConfig a échoué : %v", err)
 	}
@@ -86,7 +86,7 @@ func TestGenerateConfig_FilenameMatchesName(t *testing.T) {
 
 func TestGenerateConfig_ContainsGateway(t *testing.T) {
 	conf := newConf(t, "192.168.1.0/29")
-	path, _ := GenerateConfig(conf)
+	path, _, _ := GenerateConfig(conf)
 	content, _ := os.ReadFile(path)
 
 	if !strings.Contains(string(content), "dhcp-option=3,192.168.1.1") {
@@ -102,7 +102,7 @@ func TestGenerateConfig_ContainsDhcpRange(t *testing.T) {
 		Name:    "vpc1",
 		ConfDir: t.TempDir(),
 	}
-	path, _ := GenerateConfig(conf)
+	path, _, _ := GenerateConfig(conf)
 	content, _ := os.ReadFile(path)
 
 	if !strings.Contains(string(content), "dhcp-range=10.10.0.0,static,255.255.255.0,12h") {
@@ -113,7 +113,7 @@ func TestGenerateConfig_ContainsDhcpRange(t *testing.T) {
 func TestGenerateConfig_OneHostEntryPerIP(t *testing.T) {
 	// /29 = réseau + broadcast + 6 hôtes → 8 adresses
 	conf := newConf(t, "10.0.0.0/29")
-	path, _ := GenerateConfig(conf)
+	path, _, _ := GenerateConfig(conf)
 	content, _ := os.ReadFile(path)
 
 	lines := strings.Split(string(content), "\n")
@@ -131,7 +131,7 @@ func TestGenerateConfig_OneHostEntryPerIP(t *testing.T) {
 
 func TestGenerateConfig_MACPrefix(t *testing.T) {
 	conf := newConf(t, "10.0.0.0/30") // 4 adresses
-	path, _ := GenerateConfig(conf)
+	path, _, _ := GenerateConfig(conf)
 	content, _ := os.ReadFile(path)
 
 	if !strings.Contains(string(content), "00:22:33:") {
@@ -148,7 +148,7 @@ func TestGenerateConfig_CreatesConfDir(t *testing.T) {
 		Name:    "net",
 		ConfDir: dir,
 	}
-	if _, err := GenerateConfig(conf); err != nil {
+	if _, _, err := GenerateConfig(conf); err != nil {
 		t.Fatalf("GenerateConfig devrait créer les répertoires manquants : %v", err)
 	}
 	if _, err := os.Stat(dir); os.IsNotExist(err) {

internal/dhcp/generate.go

@@ -8,7 +8,7 @@ import (
 	"strings"
 )
 
-func GenerateConfig(c Config) (string, error) {
+func GenerateConfig(c Config) (string, map[string]string, error) {
 	mask := fmt.Sprintf("%d.%d.%d.%d", c.Network.Mask[0], c.Network.Mask[1], c.Network.Mask[2], c.Network.Mask[3])
 
 	var sb strings.Builder
@@ -17,18 +17,20 @@ func GenerateConfig(c Config) (string, error) {
 	fmt.Fprintf(&sb, "dhcp-option=3,%s\n", c.Gateway.String())
 	fmt.Fprintf(&sb, "dhcp-option=6,1.1.1.1,8.8.8.8\n\n")
 
+	entries := make(map[string]string)
 	i := 0
 	for ip := cloneIP(c.Network.IP); c.Network.Contains(ip); incrementIP(ip) {
-		fmt.Fprintf(&sb, "dhcp-host=00:22:33:%02X:%02X:%02X,%s\n",
-			(i>>16)&0xFF, (i>>8)&0xFF, i&0xFF, ip)
+		mac := fmt.Sprintf("00:22:33:%02X:%02X:%02X", (i>>16)&0xFF, (i>>8)&0xFF, i&0xFF)
+		fmt.Fprintf(&sb, "dhcp-host=%s,%s\n", mac, ip)
+		entries[ip.String()] = mac
 		i++
 	}
 
 	outPath := filepath.Join(c.ConfDir, c.Name+".conf")
 	if err := os.MkdirAll(c.ConfDir, 0755); err != nil {
-		return "", err
+		return "", nil, err
 	}
-	return outPath, os.WriteFile(outPath, []byte(sb.String()), 0644)
+	return outPath, entries, os.WriteFile(outPath, []byte(sb.String()), 0644)
 }
 
 func incrementIP(ip net.IP) {

internal/iptables/iptables.go

@@ -0,0 +1,42 @@
+package iptables
+
+import (
+	"fmt"
+	"os/exec"
+)
+
+func addRule(args ...string) error {
+	return exec.Command("iptables", append([]string{"-t", "nat", "-A"}, args...)...).Run()
+}
+
+func deleteRule(args ...string) error {
+	return exec.Command("iptables", append([]string{"-t", "nat", "-D"}, args...)...).Run()
+}
+
+func AddMetadataRedirect(vmIP, gatewayIP, metadataPort string) error {
+	if err := addRule("PREROUTING",
+		"-s", vmIP+"/32",
+		"-d", "169.254.169.254/32",
+		"-p", "tcp", "-m", "tcp",
+		"--dport", "80",
+		"-j", "DNAT",
+		"--to-destination", gatewayIP+":"+metadataPort,
+	); err != nil {
+		return fmt.Errorf("iptables metadata redirect: %w", err)
+	}
+	return nil
+}
+
+func DeleteMetadataRedirect(vmIP, gatewayIP, metadataPort string) error {
+	if err := deleteRule("PREROUTING",
+		"-s", vmIP+"/32",
+		"-d", "169.254.169.254/32",
+		"-p", "tcp", "-m", "tcp",
+		"--dport", "80",
+		"-j", "DNAT",
+		"--to-destination", gatewayIP+":"+metadataPort,
+	); err != nil {
+		return fmt.Errorf("iptables delete metadata redirect: %w", err)
+	}
+	return nil
+}

internal/netif/tap_linux.go

@@ -26,3 +26,9 @@ func CreateTap(tapID int, bridgeName, vpcName string) error {
 		return LinkSetUp(name)
 	})
 }
+
+func DeleteTap(tapID int, vpcName string) error {
+	return netns.Call(vpcName, func() error {
+		return DeleteLink(fmt.Sprintf("tap%d", tapID))
+	})
+}

internal/netif/tap_other.go

@@ -7,3 +7,7 @@ import "errors"
 func CreateTap(_ int, _, _ string) error {
 	return errors.New("netif: tap not supported on this platform")
 }
+
+func DeleteTap(_ int, _ string) error {
+	return errors.New("netif: tap not supported on this platform")
+}

internal/subnet/create.go

@@ -2,9 +2,6 @@ package subnet
 
 import (
 	"fmt"
-	"net"
-	"strconv"
-	"strings"
 
 	"git.g3e.fr/syonad/two/internal/dhcp"
 	"git.g3e.fr/syonad/two/internal/ebtables"
@@ -25,94 +22,51 @@ func CreateSubnet(db *badger.DB, subnetName string) error {
 		return nil
 	}
 
-	// lecture des paramètres depuis la DB
-	vpcName, err := kv.GetFromDB(db, "subnet/"+subnetName+"/vpc")
+	d, err := loadSubnet(db, subnetName)
 	if err != nil {
-		return fmt.Errorf("get vpc: %w", err)
+		return err
 	}
 
-	vxlanIDStr, err := kv.GetFromDB(db, "subnet/"+subnetName+"/vxlan_id")
-	if err != nil {
-		return fmt.Errorf("get vxlan_id: %w", err)
-	}
-	vxlanID, err := strconv.Atoi(vxlanIDStr)
-	if err != nil {
-		return fmt.Errorf("parse vxlan_id: %w", err)
-	}
+	vxlanIface := fmt.Sprintf("vxlan-%d", d.vxlanID)
 
-	localIface, err := kv.GetFromDB(db, "subnet/"+subnetName+"/local_iface")
-	if err != nil {
-		return fmt.Errorf("get local_iface: %w", err)
-	}
-
-	gatewayIPStr, err := kv.GetFromDB(db, "subnet/"+subnetName+"/gateway_ip")
-	if err != nil {
-		return fmt.Errorf("get gateway_ip: %w", err)
-	}
-	gatewayIP := net.ParseIP(gatewayIPStr)
-	if gatewayIP == nil {
-		return fmt.Errorf("invalid gateway_ip: %s", gatewayIPStr)
-	}
-
-	cidr, err := kv.GetFromDB(db, "subnet/"+subnetName+"/cidr")
-	if err != nil {
-		return fmt.Errorf("get cidr: %w", err)
-	}
-	_, subnet, err := net.ParseCIDR(cidr)
-	if err != nil {
-		return fmt.Errorf("parse cidr: %w", err)
-	}
-
-	// subnet_id = partie après le premier '-' (ex: "sn-00001" -> "00001")
-	subnetID := strings.SplitN(subnetName, "-", 2)[1]
-	bridge := "br-" + subnetID
-	vxlanIface := fmt.Sprintf("vxlan-%d", vxlanID)
-
-	// veth pair
-	if err := netif.CreateVethToNetns("v-"+subnetID+"-e", "v-"+subnetID+"-i", "/var/run/netns/"+vpcName, 1500); err != nil {
+	if err := netif.CreateVethToNetns("v-"+d.subnetID+"-e", "v-"+d.subnetID+"-i", "/var/run/netns/"+d.vpc, 1500); err != nil {
 		return fmt.Errorf("create veth: %w", err)
 	}
 
-	// bridge dans le root netns
-	if err := netif.CreateBridge(bridge, 1500); err != nil {
+	if err := netif.CreateBridge(d.bridge, 1500); err != nil {
 		return fmt.Errorf("create bridge: %w", err)
 	}
 
-	// bridge dans le netns VPC
-	if err := netns.Call(vpcName, func() error {
-		return netif.CreateBridge(bridge, 1500)
+	if err := netns.Call(d.vpc, func() error {
+		return netif.CreateBridge(d.bridge, 1500)
 	}); err != nil {
 		return fmt.Errorf("create bridge in netns: %w", err)
 	}
 
-	// vxlan
-	if err := netif.CreateVxlan(vxlanIface, vxlanID, localIface, 1500); err != nil {
+	if err := netif.CreateVxlan(vxlanIface, d.vxlanID, d.localIface, 1500); err != nil {
 		return fmt.Errorf("create vxlan: %w", err)
 	}
 
-	// ajout des interfaces dans les bridges
-	if err := netif.BridgeSetMaster("v-"+subnetID+"-e", bridge); err != nil {
+	if err := netif.BridgeSetMaster("v-"+d.subnetID+"-e", d.bridge); err != nil {
 		return fmt.Errorf("add veth-e to bridge: %w", err)
 	}
-	if err := netns.Call(vpcName, func() error {
-		return netif.BridgeSetMaster("v-"+subnetID+"-i", bridge)
+	if err := netns.Call(d.vpc, func() error {
+		return netif.BridgeSetMaster("v-"+d.subnetID+"-i", d.bridge)
 	}); err != nil {
 		return fmt.Errorf("add veth-i to bridge in netns: %w", err)
 	}
-	if err := netif.BridgeSetMaster(vxlanIface, bridge); err != nil {
+	if err := netif.BridgeSetMaster(vxlanIface, d.bridge); err != nil {
 		return fmt.Errorf("add vxlan to bridge: %w", err)
 	}
 
-	// montée des interfaces dans le root netns
-	for _, iface := range []string{"v-" + subnetID + "-e", vxlanIface, bridge} {
+	for _, iface := range []string{"v-" + d.subnetID + "-e", vxlanIface, d.bridge} {
 		if err := netif.LinkSetUp(iface); err != nil {
 			return fmt.Errorf("set up %s: %w", iface, err)
 		}
 	}
 
-	// montée des interfaces dans le netns VPC
-	if err := netns.Call(vpcName, func() error {
-		for _, iface := range []string{"v-" + subnetID + "-i", bridge} {
+	if err := netns.Call(d.vpc, func() error {
+		for _, iface := range []string{"v-" + d.subnetID + "-i", d.bridge} {
 			if err := netif.LinkSetUp(iface); err != nil {
 				return fmt.Errorf("set up %s: %w", iface, err)
 			}
@@ -122,37 +76,38 @@ func CreateSubnet(db *badger.DB, subnetName string) error {
 		return fmt.Errorf("set up interfaces in netns: %w", err)
 	}
 
-	// IP gateway (/32) sur le bridge interne
-	if err := netns.Call(vpcName, func() error {
-		return netif.AddrAdd(bridge, gatewayIP)
+	if err := netns.Call(d.vpc, func() error {
+		return netif.AddrAdd(d.bridge, d.gatewayIP)
 	}); err != nil {
 		return fmt.Errorf("add addr to bridge in netns: %w", err)
 	}
 
-	// route subnet (scope link) dans le netns VPC
-	if err := netns.Call(vpcName, func() error {
-		return netif.RouteAdd(bridge, subnet)
+	if err := netns.Call(d.vpc, func() error {
+		return netif.RouteAdd(d.bridge, d.cidr)
 	}); err != nil {
 		return fmt.Errorf("add route in netns: %w", err)
 	}
 
-	if err := ebtables.DropARPToGateway(bridge, gatewayIP.String()); err != nil {
+	if err := ebtables.DropARPToGateway(d.bridge, d.gatewayIP.String()); err != nil {
 		return err
 	}
-	if err := ebtables.DropDHCP(bridge); err != nil {
+	if err := ebtables.DropDHCP(d.bridge); err != nil {
 		return err
 	}
 
-	// génération de la config dnsmasq et démarrage du service
 	conf := dhcp.Config{
-		Network: subnet,
-		Gateway: gatewayIP,
-		Name:    vpcName + "_" + bridge,
+		Network: d.cidr,
+		Gateway: d.gatewayIP,
+		Name:    d.vpc + "_" + d.bridge,
 		ConfDir: "/etc/dnsmasq.d",
 	}
-	if _, err := dhcp.GenerateConfig(conf); err != nil {
+	_, entries, err := dhcp.GenerateConfig(conf)
+	if err != nil {
 		return fmt.Errorf("generate dhcp config: %w", err)
 	}
+	if err := dhcp.StoreDHCPEntries(db, subnetName, entries); err != nil {
+		return fmt.Errorf("store dhcp entries: %w", err)
+	}
 
 	svc, err := systemd.New()
 	if err != nil {

internal/subnet/data.go

@@ -0,0 +1,72 @@
+package subnet
+
+import (
+	"fmt"
+	"net"
+	"strconv"
+	"strings"
+
+	"git.g3e.fr/syonad/two/pkg/db/kv"
+	"github.com/dgraph-io/badger/v4"
+)
+
+type subnetData struct {
+	vpc        string
+	subnetID   string
+	bridge     string
+	vxlanID    int
+	localIface string
+	gatewayIP  net.IP
+	cidr       *net.IPNet
+}
+
+func loadSubnet(db *badger.DB, name string) (subnetData, error) {
+	var d subnetData
+
+	d.subnetID = strings.SplitN(name, "-", 2)[1]
+	d.bridge = "br-" + d.subnetID
+
+	vpc, err := kv.GetFromDB(db, "subnet/"+name+"/vpc")
+	if err != nil {
+		return d, fmt.Errorf("get vpc: %w", err)
+	}
+	d.vpc = vpc
+
+	vxlanIDStr, err := kv.GetFromDB(db, "subnet/"+name+"/vxlan_id")
+	if err != nil {
+		return d, fmt.Errorf("get vxlan_id: %w", err)
+	}
+	vxlanID, err := strconv.Atoi(vxlanIDStr)
+	if err != nil {
+		return d, fmt.Errorf("parse vxlan_id: %w", err)
+	}
+	d.vxlanID = vxlanID
+
+	localIface, err := kv.GetFromDB(db, "subnet/"+name+"/local_iface")
+	if err != nil {
+		return d, fmt.Errorf("get local_iface: %w", err)
+	}
+	d.localIface = localIface
+
+	gatewayIPStr, err := kv.GetFromDB(db, "subnet/"+name+"/gateway_ip")
+	if err != nil {
+		return d, fmt.Errorf("get gateway_ip: %w", err)
+	}
+	gatewayIP := net.ParseIP(gatewayIPStr)
+	if gatewayIP == nil {
+		return d, fmt.Errorf("invalid gateway_ip: %s", gatewayIPStr)
+	}
+	d.gatewayIP = gatewayIP
+
+	cidrStr, err := kv.GetFromDB(db, "subnet/"+name+"/cidr")
+	if err != nil {
+		return d, fmt.Errorf("get cidr: %w", err)
+	}
+	_, ipNet, err := net.ParseCIDR(cidrStr)
+	if err != nil {
+		return d, fmt.Errorf("parse cidr: %w", err)
+	}
+	d.cidr = ipNet
+
+	return d, nil
+}

internal/subnet/delete.go

@@ -3,7 +3,6 @@ package subnet
 import (
 	"fmt"
 	"os"
-	"strings"
 
 	"git.g3e.fr/syonad/two/internal/ebtables"
 	"git.g3e.fr/syonad/two/internal/netif"
@@ -23,69 +22,52 @@ func DeleteSubnet(db *badger.DB, subnetName string) error {
 		return nil
 	}
 
-	vpcName, err := kv.GetFromDB(db, "subnet/"+subnetName+"/vpc")
+	d, err := loadSubnet(db, subnetName)
 	if err != nil {
-		return fmt.Errorf("get vpc: %w", err)
+		return err
 	}
 
-	vxlanIDStr, err := kv.GetFromDB(db, "subnet/"+subnetName+"/vxlan_id")
-	if err != nil {
-		return fmt.Errorf("get vxlan_id: %w", err)
-	}
+	vxlanIface := fmt.Sprintf("vxlan-%d", d.vxlanID)
 
-	gatewayIP, err := kv.GetFromDB(db, "subnet/"+subnetName+"/gateway_ip")
-	if err != nil {
-		return fmt.Errorf("get gateway_ip: %w", err)
-	}
-
-	subnetID := strings.SplitN(subnetName, "-", 2)[1]
-	bridge := "br-" + subnetID
-	vxlanIface := "vxlan-" + vxlanIDStr
-
-	// arrêt du service dnsmasq
 	svc, err := systemd.New()
 	if err != nil {
 		return fmt.Errorf("connect to systemd: %w", err)
 	}
 	defer svc.Close()
 
-	svcName := "dnsmasq@" + vpcName + "_" + bridge + ".service"
-	if err := svc.Stop(svcName); err != nil {
+	if err := svc.Stop("dnsmasq@" + d.vpc + "_" + d.bridge + ".service"); err != nil {
 		return fmt.Errorf("stop dnsmasq: %w", err)
 	}
 
-	// suppression de la config dnsmasq
-	if err := os.Remove("/etc/dnsmasq.d/" + vpcName + "_" + bridge + ".conf"); err != nil && !os.IsNotExist(err) {
+	if err := os.Remove("/etc/dnsmasq.d/" + d.vpc + "_" + d.bridge + ".conf"); err != nil && !os.IsNotExist(err) {
 		return fmt.Errorf("remove dnsmasq config: %w", err)
 	}
+	if err := kv.DeleteInDB(db, "subnet/"+subnetName+"/dhcp"); err != nil {
+		return fmt.Errorf("delete dhcp entries: %w", err)
+	}
 
-	// suppression des règles ebtables
-	if err := ebtables.DeleteARPToGateway(bridge, gatewayIP); err != nil {
+	if err := ebtables.DeleteARPToGateway(d.bridge, d.gatewayIP.String()); err != nil {
 		return fmt.Errorf("delete ebtables arp rule: %w", err)
 	}
-	if err := ebtables.DeleteDHCP(bridge); err != nil {
+	if err := ebtables.DeleteDHCP(d.bridge); err != nil {
 		return fmt.Errorf("delete ebtables dhcp rule: %w", err)
 	}
 
-	// suppression du bridge dans le netns VPC
-	if err := netns.Call(vpcName, func() error {
-		return netif.DeleteLink(bridge)
+	if err := netns.Call(d.vpc, func() error {
+		return netif.DeleteLink(d.bridge)
 	}); err != nil {
 		return fmt.Errorf("delete bridge in netns: %w", err)
 	}
 
-	// suppression du vxlan
 	if err := netif.DeleteLink(vxlanIface); err != nil {
 		return fmt.Errorf("delete vxlan: %w", err)
 	}
 
-	// suppression du veth pair (supprime les deux côtés)
-	if err := netif.DeleteLink("v-" + subnetID + "-e"); err != nil {
+	if err := netif.DeleteLink("v-" + d.subnetID + "-e"); err != nil {
 		return fmt.Errorf("delete veth: %w", err)
 	}
 
-	// suppression du bridge dans le root netns
-	if err := netif.DeleteLink(bridge); err != nil {
+	if err := netif.DeleteLink(d.bridge); err != nil {
 		return fmt.Errorf("delete bridge: %w", err)
 	}
 

internal/vm/create.go

@@ -0,0 +1,64 @@
+package vm
+
+import (
+	"fmt"
+
+	"git.g3e.fr/syonad/two/internal/iptables"
+	"git.g3e.fr/syonad/two/internal/metadata"
+	"git.g3e.fr/syonad/two/internal/netif"
+	"git.g3e.fr/syonad/two/internal/netns"
+	"git.g3e.fr/syonad/two/internal/qemu"
+	"git.g3e.fr/syonad/two/pkg/db/kv"
+
+	"github.com/dgraph-io/badger/v4"
+)
+
+func StartVM(db *badger.DB, name string) error {
+	state, err := kv.GetFromDB(db, "vm/"+name+"/state")
+	if err != nil {
+		return err
+	}
+	if state != "starting" {
+		return nil
+	}
+
+	d, err := loadVM(db, name)
+	if err != nil {
+		return err
+	}
+
+	if err := netif.CreateTap(d.tapID, d.bridge, d.vpcName); err != nil {
+		return fmt.Errorf("create tap: %w", err)
+	}
+
+	if err := netns.Call(d.vpcName, func() error {
+		return iptables.AddMetadataRedirect(d.ip, d.gatewayIP, d.metadataPort)
+	}); err != nil {
+		return fmt.Errorf("add metadata redirect: %w", err)
+	}
+
+	if err := metadata.StartMetadata(metadata.NoCloudConfig{
+		Name:     name,
+		VpcName:  d.vpcName,
+		BindIP:   d.gatewayIP,
+		BindPort: d.metadataPort,
+		Password: d.password,
+		SSHKEY:   d.sshkey,
+	}, db, false); err != nil {
+		return fmt.Errorf("start metadata: %w", err)
+	}
+
+	if err := qemu.Start(qemu.Config{
+		Name:       name,
+		VpcName:    d.vpcName,
+		TapID:      d.tapID,
+		Mac:        d.mac,
+		VolumePath: d.volumePath,
+		Memory:     d.memory,
+		CPUs:       d.cpus,
+	}); err != nil {
+		return fmt.Errorf("start qemu: %w", err)
+	}
+
+	return kv.AddInDB(db, "vm/"+name+"/state", "started")
+}

internal/vm/data.go

@@ -0,0 +1,106 @@
+package vm
+
+import (
+	"fmt"
+	"math/rand"
+	"strconv"
+	"strings"
+
+	"git.g3e.fr/syonad/two/internal/dhcp"
+	"git.g3e.fr/syonad/two/pkg/db/kv"
+	"github.com/dgraph-io/badger/v4"
+)
+
+type vmData struct {
+	subnetName   string
+	vpcName      string
+	gatewayIP    string
+	bridge       string
+	tapID        int
+	ip           string
+	metadataPort string
+	mac          string
+	volumePath   string
+	memory       int
+	cpus         int
+	password     string
+	sshkey       string
+}
+
+func loadVM(db *badger.DB, name string) (vmData, error) {
+	var d vmData
+
+	subnetName, err := kv.GetFromDB(db, "vm/"+name+"/subnet")
+	if err != nil {
+		return d, fmt.Errorf("get subnet: %w", err)
+	}
+	d.subnetName = subnetName
+	d.bridge = "br-" + strings.SplitN(subnetName, "-", 2)[1]
+
+	vpcName, err := kv.GetFromDB(db, "subnet/"+subnetName+"/vpc")
+	if err != nil {
+		return d, fmt.Errorf("get vpc: %w", err)
+	}
+	d.vpcName = vpcName
+
+	gatewayIP, err := kv.GetFromDB(db, "subnet/"+subnetName+"/gateway_ip")
+	if err != nil {
+		return d, fmt.Errorf("get gateway_ip: %w", err)
+	}
+	d.gatewayIP = gatewayIP
+
+	tapIDStr, err := kv.GetFromDB(db, "vm/"+name+"/tap_id")
+	if err != nil {
+		d.tapID = rand.Intn(90000000) + 10000000
+		if err := kv.AddInDB(db, "vm/"+name+"/tap_id", strconv.Itoa(d.tapID)); err != nil {
+			return d, fmt.Errorf("store tap_id: %w", err)
+		}
+	} else {
+		tapID, err := strconv.Atoi(tapIDStr)
+		if err != nil {
+			return d, fmt.Errorf("parse tap_id: %w", err)
+		}
+		d.tapID = tapID
+	}
+
+	ip, err := kv.GetFromDB(db, "vm/"+name+"/ip")
+	if err != nil {
+		return d, fmt.Errorf("get ip: %w", err)
+	}
+	d.ip = ip
+
+	metadataPort, err := kv.GetFromDB(db, "vm/"+name+"/metadata_port")
+	if err != nil {
+		return d, fmt.Errorf("get metadata_port: %w", err)
+	}
+	d.metadataPort = metadataPort
+
+	mac, err := dhcp.GetMACForIP(db, d.subnetName, d.ip)
+	if err != nil {
+		return d, fmt.Errorf("get mac for ip %s: %w", d.ip, err)
+	}
+	d.mac = mac
+
+	volumePath, err := kv.GetFromDB(db, "vm/"+name+"/volume_path")
+	if err != nil {
+		return d, fmt.Errorf("get volume_path: %w", err)
+	}
+	d.volumePath = volumePath
+
+	memoryStr, err := kv.GetFromDB(db, "vm/"+name+"/memory")
+	if err != nil {
+		return d, fmt.Errorf("get memory: %w", err)
+	}
+	d.memory, _ = strconv.Atoi(memoryStr)
+
+	cpusStr, err := kv.GetFromDB(db, "vm/"+name+"/cpus")
+	if err != nil {
+		return d, fmt.Errorf("get cpus: %w", err)
+	}
+	d.cpus, _ = strconv.Atoi(cpusStr)
+
+	d.password, _ = kv.GetFromDB(db, "vm/"+name+"/password")
+	d.sshkey, _ = kv.GetFromDB(db, "vm/"+name+"/sshkey")
+
+	return d, nil
+}

internal/vm/delete.go

@@ -0,0 +1,69 @@
+package vm
+
+import (
+	"fmt"
+	"time"
+
+	configuration "git.g3e.fr/syonad/two/internal/config/agent"
+	"git.g3e.fr/syonad/two/internal/iptables"
+	"git.g3e.fr/syonad/two/internal/metadata"
+	"git.g3e.fr/syonad/two/internal/netif"
+	"git.g3e.fr/syonad/two/internal/netns"
+	"git.g3e.fr/syonad/two/internal/qmp"
+	"git.g3e.fr/syonad/two/pkg/db/kv"
+
+	"github.com/dgraph-io/badger/v4"
+)
+
+func StopVM(db *badger.DB, name string, cfg *configuration.Config) error {
+	state, err := kv.GetFromDB(db, "vm/"+name+"/state")
+	if err != nil {
+		return err
+	}
+	if state != "stopping" {
+		return nil
+	}
+
+	d, err := loadVM(db, name)
+	if err != nil {
+		return err
+	}
+
+	socketPath := fmt.Sprintf("/tmp/%s.qmp-sock", name)
+
+	if _, err := qmp.Send(socketPath, []string{`{"execute":"system_powerdown"}`}); err != nil {
+		return fmt.Errorf("qmp system_powerdown: %w", err)
+	}
+
+	// attendre l'arrêt effectif de la VM ; forcer via quit après timeout
+	timeout := time.After(time.Duration(cfg.Dispatcher.TimeoutSeconds) * time.Second)
+	poll := time.Duration(cfg.Dispatcher.PollSeconds) * time.Second
+	stopped := false
+	for !stopped {
+		select {
+		case <-timeout:
+			qmp.Send(socketPath, []string{`{"execute":"quit"}`})
+			stopped = true
+		case <-time.After(poll):
+			if _, err := qmp.Send(socketPath, nil); err != nil {
+				stopped = true
+			}
+		}
+	}
+
+	if err := netns.Call(d.vpcName, func() error {
+		return iptables.DeleteMetadataRedirect(d.ip, d.gatewayIP, d.metadataPort)
+	}); err != nil {
+		return fmt.Errorf("delete metadata redirect: %w", err)
+	}
+
+	if err := metadata.StopMetadata(name, db, false); err != nil {
+		return fmt.Errorf("stop metadata: %w", err)
+	}
+
+	if err := netif.DeleteTap(d.tapID, d.vpcName); err != nil {
+		return fmt.Errorf("delete tap: %w", err)
+	}
+
+	return kv.AddInDB(db, "vm/"+name+"/state", "stopped")
+}