93 lines
2.4 KiB
Go
93 lines
2.4 KiB
Go
package subnet
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
"strings"
|
|
|
|
"git.g3e.fr/syonad/two/internal/ebtables"
|
|
"git.g3e.fr/syonad/two/internal/netif"
|
|
"git.g3e.fr/syonad/two/internal/netns"
|
|
"git.g3e.fr/syonad/two/pkg/db/kv"
|
|
"git.g3e.fr/syonad/two/pkg/systemd"
|
|
|
|
"github.com/dgraph-io/badger/v4"
|
|
)
|
|
|
|
func DeleteSubnet(db *badger.DB, subnetName string) error {
|
|
state, err := kv.GetFromDB(db, "subnet/"+subnetName+"/state")
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if state != "deleting" {
|
|
return nil
|
|
}
|
|
|
|
vpcName, err := kv.GetFromDB(db, "subnet/"+subnetName+"/vpc")
|
|
if err != nil {
|
|
return fmt.Errorf("get vpc: %w", err)
|
|
}
|
|
|
|
vxlanIDStr, err := kv.GetFromDB(db, "subnet/"+subnetName+"/vxlan_id")
|
|
if err != nil {
|
|
return fmt.Errorf("get vxlan_id: %w", err)
|
|
}
|
|
|
|
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 {
|
|
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) {
|
|
return fmt.Errorf("remove dnsmasq config: %w", err)
|
|
}
|
|
|
|
// suppression des règles ebtables
|
|
if err := ebtables.DeleteARPToGateway(bridge, gatewayIP); err != nil {
|
|
return fmt.Errorf("delete ebtables arp rule: %w", err)
|
|
}
|
|
if err := ebtables.DeleteDHCP(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)
|
|
}); 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 {
|
|
return fmt.Errorf("delete veth: %w", err)
|
|
}
|
|
|
|
// suppression du bridge dans le root netns
|
|
if err := netif.DeleteLink(bridge); err != nil {
|
|
return fmt.Errorf("delete bridge: %w", err)
|
|
}
|
|
|
|
return kv.AddInDB(db, "subnet/"+subnetName+"/state", "deleted")
|
|
}
|