func cmdDel(args *skel.CmdArgs) error {
n, err := loadNetConf(args.StdinData)
if err != nil {
return err
}
if err := ipam.ExecDel(n.IPAM.Type, args.StdinData); err != nil {
return err
}
var ipn *net.IPNet
err = ns.WithNetNSPath(args.Netns, false, func(hostNS *os.File) error {
var err error
ipn, err = ip.DelLinkByNameAddr(args.IfName, netlink.FAMILY_V4)
return err
})
if err != nil {
return err
}
if n.IPMasq {
chain := utils.FormatChainName(n.Name, args.ContainerID)
comment := utils.FormatComment(n.Name, args.ContainerID)
if err = ip.TeardownIPMasq(ipn, chain, comment); err != nil {
return err
}
}
return nil
}
func cmdDel(args *skel.CmdArgs) error {
conf := NetConf{}
if err := json.Unmarshal(args.StdinData, &conf); err != nil {
return fmt.Errorf("failed to load netconf: %v", err)
}
if err := ipam.ExecDel(conf.IPAM.Type, args.StdinData); err != nil {
return err
}
if args.Netns == "" {
return nil
}
var ipn *net.IPNet
err := ns.WithNetNSPath(args.Netns, func(_ ns.NetNS) error {
var err error
ipn, err = ip.DelLinkByNameAddr(args.IfName, netlink.FAMILY_V4)
return err
})
if err != nil {
return err
}
if conf.IPMasq {
chain := utils.FormatChainName(conf.Name, args.ContainerID)
comment := utils.FormatComment(conf.Name, args.ContainerID)
if err = ip.TeardownIPMasq(ipn, chain, comment); err != nil {
return err
}
}
return nil
}
// teardownKvmNets teardown every active networking from networking by
// removing tuntap interface and releasing its ip from IPAM plugin
func (n *Networking) teardownKvmNets() {
for _, an := range n.nets {
if an.conf.Type == "flannel" {
if err := kvmTransformFlannelNetwork(&an); err != nil {
stderr.PrintE("error transforming flannel network", err)
continue
}
}
switch an.conf.Type {
case "ptp", "bridge":
// remove tuntap interface
tuntap.RemovePersistentIface(an.runtime.IfName, tuntap.Tap)
case "macvlan":
link, err := netlink.LinkByName(an.runtime.IfName)
if err != nil {
stderr.PrintE(fmt.Sprintf("cannot find link `%v`", an.runtime.IfName), err)
continue
} else {
err := netlink.LinkDel(link)
if err != nil {
stderr.PrintE(fmt.Sprintf("cannot remove link `%v`", an.runtime.IfName), err)
continue
}
}
default:
stderr.Printf("unsupported network type: %q", an.conf.Type)
continue
}
// ugly hack again to directly call IPAM plugin to release IP
an.conf.Type = an.conf.IPAM.Type
_, err := n.execNetPlugin("DEL", &an, an.runtime.IfName)
if err != nil {
stderr.PrintE("error executing network plugin", err)
}
// remove masquerading if it was prepared
if an.conf.IPMasq {
chain := cniutils.FormatChainName(an.conf.Name, n.podID.String())
comment := cniutils.FormatChainName(an.conf.Name, n.podID.String())
err := ip.TeardownIPMasq(&net.IPNet{
IP: an.runtime.IP,
Mask: net.IPMask(an.runtime.Mask),
}, chain, comment)
if err != nil {
stderr.PrintE("error on removing masquerading", err)
}
}
}
}