func cmdAdd(args *skel.CmdArgs) error {
tuningConf := TuningConf{}
if err := json.Unmarshal(args.StdinData, &tuningConf); err != nil {
return fmt.Errorf("failed to load netconf: %v", err)
}
// The directory /proc/sys/net is per network namespace. Enter in the
// network namespace before writing on it.
err := ns.WithNetNSPath(args.Netns, func(_ ns.NetNS) error {
for key, value := range tuningConf.SysCtl {
fileName := filepath.Join("/proc/sys", strings.Replace(key, ".", "/", -1))
fileName = filepath.Clean(fileName)
// Refuse to modify sysctl parameters that don't belong
// to the network subsystem.
if !strings.HasPrefix(fileName, "/proc/sys/net/") {
return fmt.Errorf("invalid net sysctl key: %q", key)
}
content := []byte(value)
err := ioutil.WriteFile(fileName, content, 0644)
if err != nil {
return err
}
}
return nil
})
if err != nil {
return err
}
result := types.Result{}
return result.Print()
}
func setupVeth(netns string, br *netlink.Bridge, ifName string, mtu int, hairpinMode bool) error {
var hostVethName string
err := ns.WithNetNSPath(netns, false, func(hostNS *os.File) error {
// create the veth pair in the container and move host end into host netns
hostVeth, _, err := ip.SetupVeth(ifName, mtu, hostNS)
if err != nil {
return err
}
hostVethName = hostVeth.Attrs().Name
return nil
})
if err != nil {
return err
}
// need to lookup hostVeth again as its index has changed during ns move
hostVeth, err := netlink.LinkByName(hostVethName)
if err != nil {
return fmt.Errorf("failed to lookup %q: %v", hostVethName, err)
}
// connect host veth end to the bridge
if err = netlink.LinkSetMaster(hostVeth, br); err != nil {
return fmt.Errorf("failed to connect %q to bridge %v: %v", hostVethName, br.Attrs().Name, err)
}
// set hairpin mode
if err = netlink.LinkSetHairpin(hostVeth, hairpinMode); err != nil {
return fmt.Errorf("failed to setup hairpin mode for %v: %v", hostVethName, err)
}
return nil
}
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
}
func cmdDel(args *skel.CmdArgs) error {
c, err := cnc.NewDefaultClient()
if err != nil {
return fmt.Errorf("error while starting cilium-client: %s", err)
}
ep, err := c.EndpointGetByDockerID(args.ContainerID)
if err != nil {
return fmt.Errorf("error while retrieving endpoint from cilium daemon: %s", err)
}
if ep == nil {
return fmt.Errorf("endpoint with container ID %s not found", args.ContainerID)
}
ipv6addr := ep.IPv6.IP()
if err = c.ReleaseIP(ipam.CNIIPAMType, ipam.IPAMReq{IP: &ipv6addr}); err != nil {
log.Warningf("failed to release allocated IPv6 of container ID %q: %s", args.ContainerID, err)
}
ipv4addr := ep.IPv4.IP()
if ep.IPv4 != nil {
if err = c.ReleaseIP(ipam.CNIIPAMType, ipam.IPAMReq{IP: &ipv4addr}); err != nil {
log.Warningf("failed to release allocated IPv4 of container ID %q: %s", args.ContainerID, err)
}
}
if err := c.EndpointLeave(ep.ID); err != nil {
log.Warningf("leaving the endpoint failed: %s\n", err)
}
return ns.WithNetNSPath(args.Netns, func(_ ns.NetNS) error {
return plugins.DelLinkByName(args.IfName)
})
}
func cmdDel(args *skel.CmdArgs) error {
n, err := loadConf(args.StdinData)
if err != nil {
return err
}
err = ipam.ExecDel(n.IPAM.Type, args.StdinData)
if err != nil {
return err
}
return ns.WithNetNSPath(args.Netns, false, func(hostNS *os.File) error {
return ip.DelLinkByName(args.IfName)
})
}
// Adds a macvlan interface to a container for use with the egress router feature
func addMacvlan(netns string) error {
var defIface netlink.Link
var err error
// Find interface with the default route
routes, err := netlink.RouteList(nil, netlink.FAMILY_V4)
if err != nil {
return fmt.Errorf("failed to read routes: %v", err)
}
for _, r := range routes {
if r.Dst == nil {
defIface, err = netlink.LinkByIndex(r.LinkIndex)
if err != nil {
return fmt.Errorf("failed to get default route interface: %v", err)
}
}
}
if defIface == nil {
return fmt.Errorf("failed to find default route interface")
}
return ns.WithNetNSPath(netns, func(ns.NetNS) error {
err := netlink.LinkAdd(&netlink.Macvlan{
LinkAttrs: netlink.LinkAttrs{
MTU: defIface.Attrs().MTU,
Name: "macvlan0",
ParentIndex: defIface.Attrs().Index,
},
Mode: netlink.MACVLAN_MODE_PRIVATE,
})
if err != nil {
return fmt.Errorf("failed to create macvlan interface: %v", err)
}
l, err := netlink.LinkByName("macvlan0")
if err != nil {
return fmt.Errorf("failed to find macvlan interface: %v", err)
}
err = netlink.LinkSetUp(l)
if err != nil {
return fmt.Errorf("failed to set macvlan interface up: %v", err)
}
return nil
})
}
func cmdDel(args *skel.CmdArgs) error {
n, err := loadConf(args.StdinData)
if err != nil {
return err
}
err = ipam.ExecDel(n.IPAM.Type, args.StdinData)
if err != nil {
return err
}
if args.Netns == "" {
return nil
}
return ns.WithNetNSPath(args.Netns, func(_ ns.NetNS) error {
return ip.DelLinkByName(args.IfName)
})
}
func cmdDel(args *skel.CmdArgs) error {
args.IfName = "lo" // ignore config, this only works for loopback
err := ns.WithNetNSPath(args.Netns, func(ns.NetNS) error {
link, err := netlink.LinkByName(args.IfName)
if err != nil {
return err // not tested
}
err = netlink.LinkSetDown(link)
if err != nil {
return err // not tested
}
return nil
})
if err != nil {
return err // not tested
}
return nil
}
// AcquireLease gets an DHCP lease and then maintains it in the background
// by periodically renewing it. The acquired lease can be released by
// calling DHCPLease.Stop()
func AcquireLease(clientID, netns, ifName string) (*DHCPLease, error) {
errCh := make(chan error, 1)
l := &DHCPLease{
clientID: clientID,
stop: make(chan struct{}),
}
log.Printf("%v: acquiring lease", clientID)
l.wg.Add(1)
go func() {
errCh <- ns.WithNetNSPath(netns, func(_ ns.NetNS) error {
defer l.wg.Done()
link, err := netlink.LinkByName(ifName)
if err != nil {
return fmt.Errorf("error looking up %q: %v", ifName, err)
}
l.link = link
if err = l.acquire(); err != nil {
return err
}
log.Printf("%v: lease acquired, expiration is %v", l.clientID, l.expireTime)
errCh <- nil
l.maintain()
return nil
})
}()
if err := <-errCh; err != nil {
return nil, err
}
return l, nil
}
func cmdAdd(args *skel.CmdArgs) error {
args.IfName = "lo" // ignore config, this only works for loopback
err := ns.WithNetNSPath(args.Netns, func(_ ns.NetNS) error {
link, err := netlink.LinkByName(args.IfName)
if err != nil {
return err // not tested
}
err = netlink.LinkSetUp(link)
if err != nil {
return err // not tested
}
return nil
})
if err != nil {
return err // not tested
}
result := types.Result{}
return result.Print()
}
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)
}
ConfigureLogging(conf.LogLevel)
workload, orchestrator, err := GetIdentifiers(args)
if err != nil {
return err
}
logger := CreateContextLogger(workload)
// Allow the hostname to be overridden by the network config
if conf.Hostname != "" {
hostname = conf.Hostname
}
logger.WithFields(log.Fields{
"Workload": workload,
"Orchestrator": orchestrator,
"Node": hostname,
}).Info("Extracted identifiers")
// Always try to release the address. Don't deal with any errors till the endpoints are cleaned up.
fmt.Fprintf(os.Stderr, "Calico CNI releasing IP address\n")
logger.WithFields(log.Fields{"paths": os.Getenv("CNI_PATH"),
"type": conf.IPAM.Type}).Debug("Looking for IPAM plugin in paths")
ipamErr := ipam.ExecDel(conf.IPAM.Type, args.StdinData)
if ipamErr != nil {
logger.Error(ipamErr)
}
calicoClient, err := CreateClient(conf)
if err != nil {
return err
}
if err := calicoClient.WorkloadEndpoints().Delete(api.WorkloadEndpointMetadata{
Name: args.IfName,
Node: hostname,
Orchestrator: orchestrator,
Workload: workload}); err != nil {
return err
}
// Only try to delete the device if a namespace was passed in.
if args.Netns != "" {
fmt.Fprintf(os.Stderr, "Calico CNI deleting device in netns %s\n", args.Netns)
err = ns.WithNetNSPath(args.Netns, func(_ ns.NetNS) error {
_, err = ip.DelLinkByNameAddr(args.IfName, netlink.FAMILY_V4)
return err
})
if err != nil {
return err
}
}
// Return the IPAM error if there was one. The IPAM error will be lost if there was also an error in cleaning up
// the device or endpoint, but crucially, the user will know the overall operation failed.
return ipamErr
}
func setupContainerVeth(netns, ifName string, mtu int, pr *types.Result) (string, error) {
// The IPAM result will be something like IP=192.168.3.5/24, GW=192.168.3.1.
// What we want is really a point-to-point link but veth does not support IFF_POINTOPONT.
// Next best thing would be to let it ARP but set interface to 192.168.3.5/32 and
// add a route like "192.168.3.0/24 via 192.168.3.1 dev $ifName".
// Unfortunately that won't work as the GW will be outside the interface's subnet.
// Our solution is to configure the interface with 192.168.3.5/24, then delete the
// "192.168.3.0/24 dev $ifName" route that was automatically added. Then we add
// "192.168.3.1/32 dev $ifName" and "192.168.3.0/24 via 192.168.3.1 dev $ifName".
// In other words we force all traffic to ARP via the gateway except for GW itself.
var hostVethName string
err := ns.WithNetNSPath(netns, func(hostNS ns.NetNS) error {
hostVeth, _, err := ip.SetupVeth(ifName, mtu, hostNS)
if err != nil {
return err
}
hostNS.Do(func(_ ns.NetNS) error {
hostVethName = hostVeth.Attrs().Name
if err := ip.SetHWAddrByIP(hostVethName, pr.IP4.IP.IP, nil /* TODO IPv6 */); err != nil {
return fmt.Errorf("failed to set hardware addr by IP: %v", err)
}
return nil
})
if err = ipam.ConfigureIface(ifName, pr); err != nil {
return err
}
contVeth, err := netlink.LinkByName(ifName)
if err != nil {
return fmt.Errorf("failed to look up %q: %v", ifName, err)
}
if err := ip.SetHWAddrByIP(contVeth.Attrs().Name, pr.IP4.IP.IP, nil /* TODO IPv6 */); err != nil {
return fmt.Errorf("failed to set hardware addr by IP: %v", err)
}
// Delete the route that was automatically added
route := netlink.Route{
LinkIndex: contVeth.Attrs().Index,
Dst: &net.IPNet{
IP: pr.IP4.IP.IP.Mask(pr.IP4.IP.Mask),
Mask: pr.IP4.IP.Mask,
},
Scope: netlink.SCOPE_NOWHERE,
}
if err := netlink.RouteDel(&route); err != nil {
return fmt.Errorf("failed to delete route %v: %v", route, err)
}
for _, r := range []netlink.Route{
netlink.Route{
LinkIndex: contVeth.Attrs().Index,
Dst: &net.IPNet{
IP: pr.IP4.Gateway,
Mask: net.CIDRMask(32, 32),
},
Scope: netlink.SCOPE_LINK,
Src: pr.IP4.IP.IP,
},
netlink.Route{
LinkIndex: contVeth.Attrs().Index,
Dst: &net.IPNet{
IP: pr.IP4.IP.IP.Mask(pr.IP4.IP.Mask),
Mask: pr.IP4.IP.Mask,
},
Scope: netlink.SCOPE_UNIVERSE,
Gw: pr.IP4.Gateway,
Src: pr.IP4.IP.IP,
},
} {
if err := netlink.RouteAdd(&r); err != nil {
return fmt.Errorf("failed to add route %v: %v", r, err)
}
}
return nil
})
return hostVethName, err
}
// DoNetworking performs the networking for the given config and IPAM result
func DoNetworking(args *skel.CmdArgs, conf NetConf, res *types.Result, logger *log.Entry, desiredVethName string) (hostVethName, contVethMAC string, err error) {
// Select the first 11 characters of the containerID for the host veth.
hostVethName = "cali" + args.ContainerID[:min(11, len(args.ContainerID))]
contVethName := args.IfName
// If a desired veth name was passed in, use that instead.
if desiredVethName != "" {
hostVethName = desiredVethName
}
err = ns.WithNetNSPath(args.Netns, func(hostNS ns.NetNS) error {
veth := &netlink.Veth{
LinkAttrs: netlink.LinkAttrs{
Name: contVethName,
Flags: net.FlagUp,
MTU: conf.MTU,
},
PeerName: hostVethName,
}
if err := netlink.LinkAdd(veth); err != nil {
logger.Errorf("Error adding veth %+v: %s", veth, err)
return err
}
hostVeth, err := netlink.LinkByName(hostVethName)
if err != nil {
err = fmt.Errorf("failed to lookup %q: %v", hostVethName, err)
return err
}
contVeth, err := netlink.LinkByName(contVethName)
if err != nil {
err = fmt.Errorf("failed to lookup %q: %v", contVethName, err)
return err
}
// Fetch the MAC from the container Veth. This is needed by Calico.
contVethMAC = contVeth.Attrs().HardwareAddr.String()
logger.WithField("MAC", contVethMAC).Debug("Found MAC for container veth")
// At this point, the virtual ethernet pair has been created, and both ends have the right names.
// Both ends of the veth are still in the container's network namespace.
// Before returning, create the routes inside the namespace, first for IPv4 then IPv6.
if res.IP4 != nil {
// Add a connected route to a dummy next hop so that a default route can be set
gw := net.IPv4(169, 254, 1, 1)
gwNet := &net.IPNet{IP: gw, Mask: net.CIDRMask(32, 32)}
if err = netlink.RouteAdd(&netlink.Route{
LinkIndex: contVeth.Attrs().Index,
Scope: netlink.SCOPE_LINK,
Dst: gwNet}); err != nil {
return fmt.Errorf("failed to add route %v", err)
}
if err = ip.AddDefaultRoute(gw, contVeth); err != nil {
return fmt.Errorf("failed to add route %v", err)
}
if err = netlink.AddrAdd(contVeth, &netlink.Addr{IPNet: &res.IP4.IP}); err != nil {
return fmt.Errorf("failed to add IP addr to %q: %v", contVethName, err)
}
}
// Handle IPv6 routes
if res.IP6 != nil {
// No need to add a dummy next hop route as the host veth device will already have an IPv6
// link local address that can be used as a next hop.
// Just fetch the address of the host end of the veth and use it as the next hop.
var hostIPv6Addr net.IP
if err := hostNS.Do(func(_ ns.NetNS) error {
addresses, err := netlink.AddrList(hostVeth, netlink.FAMILY_V6)
if err != nil {
logger.Errorf("Error listing IPv6 addresses: %s", err)
return err
}
if len(addresses) < 1 {
// If the hostVeth doesn't have an IPv6 address then this host probably doesn't
// support IPv6. Since a IPv6 address has been allocated that can't be used,
// return an error.
return fmt.Errorf("Failed to get IPv6 addresses for container veth")
}
hostIPv6Addr = addresses[0].IP
return nil
}); err != nil {
logger.Errorf("Error getting IPv6 address: %s", err)
return err
}
_, defNet, _ := net.ParseCIDR("::/0")
if err = ip.AddRoute(defNet, hostIPv6Addr, contVeth); err != nil {
return fmt.Errorf("failed to add default gateway to %v %v", hostIPv6Addr, err)
}
if err = netlink.AddrAdd(contVeth, &netlink.Addr{IPNet: &res.IP6.IP}); err != nil {
return fmt.Errorf("failed to add IP addr to %q: %v", contVeth, err)
}
}
// Now that the everything has been successfully set up in the container, move the "host" end of the
// veth into the host namespace.
if err = netlink.LinkSetNsFd(hostVeth, int(hostNS.Fd())); err != nil {
return fmt.Errorf("failed to move veth to host netns: %v", err)
}
return nil
})
if err != nil {
logger.Errorf("Error creating veth: %s", err)
return "", "", err
}
// Moving a veth between namespaces always leaves it in the "DOWN" state. Set it back to "UP" now that we're
// back in the host namespace.
hostVeth, err := netlink.LinkByName(hostVethName)
if err != nil {
return "", "", fmt.Errorf("failed to lookup %q: %v", hostVethName, err)
}
if err = netlink.LinkSetUp(hostVeth); err != nil {
return "", "", fmt.Errorf("failed to set %q up: %v", hostVethName, err)
}
return hostVethName, contVethMAC, err
}
// Set up all networking (host/container veth, OVS flows, IPAM, loopback, etc)
func (m *podManager) setup(req *cniserver.PodRequest) (*cnitypes.Result, *kubehostport.RunningPod, error) {
podConfig, pod, err := m.getPodConfig(req)
if err != nil {
return nil, nil, err
}
ipamResult, err := m.ipamAdd(req.Netns, req.ContainerId)
if err != nil {
// TODO: Remove this hack once we've figured out how to retrieve the netns
// of an exited container. Currently, restarting docker will leak a bunch of
// ips. This will exhaust available ip space unless we cleanup old ips. At the
// same time we don't want to try GC'ing them periodically as that could lead
// to a performance regression in starting pods. So on each setup failure, try
// GC on the assumption that the kubelet is going to retry pod creation, and
// when it does, there will be ips.
m.ipamGarbageCollection()
return nil, nil, fmt.Errorf("failed to run IPAM for %v: %v", req.ContainerId, err)
}
podIP := ipamResult.IP4.IP.IP
// Release any IPAM allocations and hostports if the setup failed
var success bool
defer func() {
if !success {
m.ipamDel(req.ContainerId)
if err := m.hostportHandler.SyncHostports(TUN, m.getRunningPods()); err != nil {
glog.Warningf("failed syncing hostports: %v", err)
}
}
}()
// Open any hostports the pod wants
newPod := &kubehostport.RunningPod{Pod: pod, IP: podIP}
if err := m.hostportHandler.OpenPodHostportsAndSync(newPod, TUN, m.getRunningPods()); err != nil {
return nil, nil, err
}
var hostVeth, contVeth netlink.Link
err = ns.WithNetNSPath(req.Netns, func(hostNS ns.NetNS) error {
hostVeth, contVeth, err = ip.SetupVeth(podInterfaceName, int(m.mtu), hostNS)
if err != nil {
return fmt.Errorf("failed to create container veth: %v", err)
}
// refetch to get hardware address and other properties
contVeth, err = netlink.LinkByIndex(contVeth.Attrs().Index)
if err != nil {
return fmt.Errorf("failed to fetch container veth: %v", err)
}
// Clear out gateway to prevent ConfigureIface from adding the cluster
// subnet via the gateway
ipamResult.IP4.Gateway = nil
if err = ipam.ConfigureIface(podInterfaceName, ipamResult); err != nil {
return fmt.Errorf("failed to configure container IPAM: %v", err)
}
lo, err := netlink.LinkByName("lo")
if err == nil {
err = netlink.LinkSetUp(lo)
}
if err != nil {
return fmt.Errorf("failed to configure container loopback: %v", err)
}
return nil
})
if err != nil {
return nil, nil, err
}
if podConfig.wantMacvlan {
if err := addMacvlan(req.Netns); err != nil {
return nil, nil, err
}
}
contVethMac := contVeth.Attrs().HardwareAddr.String()
vnidStr := vnidToString(podConfig.vnid)
out, err := exec.Command(sdnScript, setUpCmd, hostVeth.Attrs().Name, contVethMac, podIP.String(), vnidStr, podConfig.ingressBandwidth, podConfig.egressBandwidth).CombinedOutput()
glog.V(5).Infof("SetUpPod network plugin output: %s, %v", string(out), err)
if isScriptError(err) {
return nil, nil, fmt.Errorf("error running network setup script:\nhostVethName %s, contVethMac %s, podIP %s, podConfig %#v\n %s", hostVeth.Attrs().Name, contVethMac, podIP.String(), podConfig, getScriptError(out))
} else if err != nil {
return nil, nil, err
}
success = true
return ipamResult, newPod, nil
}
})
Context("when given a network namespace", func() {
It("sets the lo device to UP", func() {
command.Env = append(environ, fmt.Sprintf("CNI_COMMAND=%s", "ADD"))
session, err := gexec.Start(command, GinkgoWriter, GinkgoWriter)
Expect(err).NotTo(HaveOccurred())
Eventually(session).Should(gbytes.Say(`{.*}`))
Eventually(session).Should(gexec.Exit(0))
var lo *net.Interface
err = ns.WithNetNSPath(networkNS, true, func(hostNS *os.File) error {
var err error
lo, err = net.InterfaceByName("lo")
return err
})
Expect(err).NotTo(HaveOccurred())
Expect(lo.Flags & net.FlagUp).To(Equal(net.FlagUp))
})
It("sets the lo device to DOWN", func() {
command.Env = append(environ, fmt.Sprintf("CNI_COMMAND=%s", "DEL"))
session, err := gexec.Start(command, GinkgoWriter, GinkgoWriter)
Expect(err).NotTo(HaveOccurred())
Eventually(session).Should(gbytes.Say(``))
Eventually(session).Should(gexec.Exit(0))
func cmdAdd(args *skel.CmdArgs) error {
n, err := loadNetConf(args.StdinData)
if err != nil {
return err
}
br, err := setupBridge(n)
if err != nil {
return err
}
if err = setupVeth(args.Netns, br, args.IfName, n.MTU, n.HairpinMode); err != nil {
return err
}
// run the IPAM plugin and get back the config to apply
result, err := ipam.ExecAdd(n.IPAM.Type, args.StdinData)
if err != nil {
return err
}
if result.IP4 == nil {
return errors.New("IPAM plugin returned missing IPv4 config")
}
if result.IP4.Gateway == nil && n.IsGW {
result.IP4.Gateway = calcGatewayIP(&result.IP4.IP)
}
err = ns.WithNetNSPath(args.Netns, false, func(hostNS *os.File) error {
return ipam.ConfigureIface(args.IfName, result)
})
if err != nil {
return err
}
if n.IsGW {
gwn := &net.IPNet{
IP: result.IP4.Gateway,
Mask: result.IP4.IP.Mask,
}
if err = ensureBridgeAddr(br, gwn); err != nil {
return err
}
if err := ip.EnableIP4Forward(); err != nil {
return fmt.Errorf("failed to enable forwarding: %v", err)
}
}
if n.IPMasq {
chain := utils.FormatChainName(n.Name, args.ContainerID)
comment := utils.FormatComment(n.Name, args.ContainerID)
if err = ip.SetupIPMasq(ip.Network(&result.IP4.IP), chain, comment); err != nil {
return err
}
}
result.DNS = n.DNS
return result.Print()
}
// Set up all networking (host/container veth, OVS flows, IPAM, loopback, etc)
func (m *podManager) setup(req *cniserver.PodRequest) (*cnitypes.Result, *kubehostport.RunningPod, error) {
podConfig, pod, err := m.getPodConfig(req)
if err != nil {
return nil, nil, err
}
ipamResult, err := m.runIPAM(req.Netns, cniserver.CNI_ADD, req.ContainerId)
if err != nil {
return nil, nil, fmt.Errorf("failed to run IPAM for %v: %v", req.ContainerId, err)
}
podIP := ipamResult.IP4.IP.IP
// Release any IPAM allocations and hostports if the setup failed
var success bool
defer func() {
if !success {
m.runIPAM(req.Netns, cniserver.CNI_DEL, req.ContainerId)
if err := m.hostportHandler.SyncHostports(TUN, m.getRunningPods()); err != nil {
glog.Warningf("failed syncing hostports: %v", err)
}
}
}()
// Open any hostports the pod wants
newPod := &kubehostport.RunningPod{Pod: pod, IP: podIP}
if err := m.hostportHandler.OpenPodHostportsAndSync(newPod, TUN, m.getRunningPods()); err != nil {
return nil, nil, err
}
var hostVeth, contVeth netlink.Link
err = ns.WithNetNSPath(req.Netns, func(hostNS ns.NetNS) error {
hostVeth, contVeth, err = ip.SetupVeth(podInterfaceName, int(m.mtu), hostNS)
if err != nil {
return fmt.Errorf("failed to create container veth: %v", err)
}
// refetch to get hardware address and other properties
contVeth, err = netlink.LinkByIndex(contVeth.Attrs().Index)
if err != nil {
return fmt.Errorf("failed to fetch container veth: %v", err)
}
// Clear out gateway to prevent ConfigureIface from adding the cluster
// subnet via the gateway
ipamResult.IP4.Gateway = nil
if err = ipam.ConfigureIface(podInterfaceName, ipamResult); err != nil {
return fmt.Errorf("failed to configure container IPAM: %v", err)
}
lo, err := netlink.LinkByName("lo")
if err == nil {
err = netlink.LinkSetUp(lo)
}
if err != nil {
return fmt.Errorf("failed to configure container loopback: %v", err)
}
return nil
})
if err != nil {
return nil, nil, err
}
if podConfig.wantMacvlan {
if err := addMacvlan(req.Netns); err != nil {
return nil, nil, err
}
}
contVethMac := contVeth.Attrs().HardwareAddr.String()
vnidStr := vnidToString(podConfig.vnid)
out, err := exec.Command(sdnScript, setUpCmd, hostVeth.Attrs().Name, contVethMac, podIP.String(), vnidStr, podConfig.ingressBandwidth, podConfig.egressBandwidth).CombinedOutput()
glog.V(5).Infof("SetUpPod network plugin output: %s, %v", string(out), err)
if isScriptError(err) {
return nil, nil, fmt.Errorf("error running network setup script:\nhostVethName %s, contVethMac %s, podIP %s, podConfig %#v\n %s", hostVeth.Attrs().Name, contVethMac, podIP.String(), podConfig, getScriptError(out))
} else if err != nil {
return nil, nil, err
}
success = true
return ipamResult, newPod, nil
}
