Merge pull request #174 from crawford/teeth

networkd: Fix issues with bonding and VLANs

network/interface.go

@@ -3,6 +3,7 @@ package network
 import (
 	"fmt"
 	"strconv"
+	"strings"
 )
 
 type InterfaceGenerator interface {
@@ -11,6 +12,8 @@ type InterfaceGenerator interface {
 	Netdev() string
 	Link() string
 	Network() string
+	Type() string
+	ModprobeParams() string
 }
 
 type networkInterface interface {
@@ -68,6 +71,10 @@ func (i *logicalInterface) Children() []networkInterface {
 	return i.children
 }
 
+func (i *logicalInterface) ModprobeParams() string {
+	return ""
+}
+
 func (i *logicalInterface) setConfigDepth(depth int) {
 	i.configDepth = depth
 }
@@ -84,9 +91,14 @@ func (p *physicalInterface) Netdev() string {
 	return ""
 }
 
+func (p *physicalInterface) Type() string {
+	return "physical"
+}
+
 type bondInterface struct {
 	logicalInterface
 	slaves  []string
+	options map[string]string
 }
 
 func (b *bondInterface) Name() string {
@@ -97,6 +109,19 @@ func (b *bondInterface) Netdev() string {
 	return fmt.Sprintf("[NetDev]\nKind=bond\nName=%s\n", b.name)
 }
 
+func (b *bondInterface) Type() string {
+	return "bond"
+}
+
+func (b *bondInterface) ModprobeParams() string {
+	params := ""
+	for name, val := range b.options {
+		params += fmt.Sprintf("%s=%s ", name, val)
+	}
+	params = strings.TrimSuffix(params, " ")
+	return params
+}
+
 type vlanInterface struct {
 	logicalInterface
 	id        int
@@ -123,6 +148,10 @@ func (v *vlanInterface) Netdev() string {
 	return config
 }
 
+func (v *vlanInterface) Type() string {
+	return "vlan"
+}
+
 func buildInterfaces(stanzas []*stanzaInterface) []InterfaceGenerator {
 	interfaceMap := createInterfaces(stanzas)
 	linkAncestors(interfaceMap)
@@ -141,15 +170,22 @@ func createInterfaces(stanzas []*stanzaInterface) map[string]networkInterface {
 	for _, iface := range stanzas {
 		switch iface.kind {
 		case interfaceBond:
+			bondOptions := make(map[string]string)
+			for _, k := range []string{"mode", "miimon", "lacp-rate"} {
+				if v, ok := iface.options["bond-"+k]; ok && len(v) > 0 {
+					bondOptions[k] = v[0]
+				}
+			}
 			interfaceMap[iface.name] = &bondInterface{
 				logicalInterface{
 					name:     iface.name,
 					config:   iface.configMethod,
 					children: []networkInterface{},
 				},
-				iface.options["slaves"],
+				iface.options["bond-slaves"],
+				bondOptions,
 			}
-			for _, slave := range iface.options["slaves"] {
+			for _, slave := range iface.options["bond-slaves"] {
 				if _, ok := interfaceMap[slave]; !ok {
 					interfaceMap[slave] = &physicalInterface{
 						logicalInterface{

network/interface_test.go

@@ -36,6 +36,7 @@ func TestPhysicalInterfaceNetwork(t *testing.T) {
 					name: "testbond1",
 				},
 				nil,
+				nil,
 			},
 			&vlanInterface{
 				logicalInterface{
@@ -67,14 +68,14 @@ VLAN=testvlan2
 }
 
 func TestBondInterfaceName(t *testing.T) {
-	b := bondInterface{logicalInterface{name: "testname"}, nil}
+	b := bondInterface{logicalInterface{name: "testname"}, nil, nil}
 	if b.Name() != "testname" {
 		t.FailNow()
 	}
 }
 
 func TestBondInterfaceNetdev(t *testing.T) {
-	b := bondInterface{logicalInterface{name: "testname"}, nil}
+	b := bondInterface{logicalInterface{name: "testname"}, nil, nil}
 	netdev := `[NetDev]
 Kind=bond
 Name=testname
@@ -102,6 +103,7 @@ func TestBondInterfaceNetwork(t *testing.T) {
 						name: "testbond1",
 					},
 					nil,
+					nil,
 				},
 				&vlanInterface{
 					logicalInterface{
@@ -120,6 +122,7 @@ func TestBondInterfaceNetwork(t *testing.T) {
 			},
 		},
 		nil,
+		nil,
 	}
 	network := `[Match]
 Name=testname
@@ -218,6 +221,61 @@ Gateway=1.2.3.4
 	}
 }
 
+func TestType(t *testing.T) {
+	for _, tt := range []struct {
+		i InterfaceGenerator
+		t string
+	}{
+		{
+			i: &physicalInterface{},
+			t: "physical",
+		},
+		{
+			i: &vlanInterface{},
+			t: "vlan",
+		},
+		{
+			i: &bondInterface{},
+			t: "bond",
+		},
+	} {
+		if tp := tt.i.Type(); tp != tt.t {
+			t.Fatalf("bad type (%q): got %s, want %s", tt.i, tp, tt.t)
+		}
+	}
+}
+
+func TestModprobeParams(t *testing.T) {
+	for _, tt := range []struct {
+		i InterfaceGenerator
+		p string
+	}{
+		{
+			i: &physicalInterface{},
+			p: "",
+		},
+		{
+			i: &vlanInterface{},
+			p: "",
+		},
+		{
+			i: &bondInterface{
+				logicalInterface{},
+				nil,
+				map[string]string{
+					"a": "1",
+					"b": "2",
+				},
+			},
+			p: "a=1 b=2",
+		},
+	} {
+		if p := tt.i.ModprobeParams(); p != tt.p {
+			t.Fatalf("bad params (%q): got %s, want %s", tt.i, p, tt.p)
+		}
+	}
+}
+
 func TestBuildInterfacesLo(t *testing.T) {
 	stanzas := []*stanzaInterface{
 		&stanzaInterface{
@@ -242,7 +300,7 @@ func TestBuildInterfacesBlindBond(t *testing.T) {
 			auto:         false,
 			configMethod: configMethodManual{},
 			options: map[string][]string{
-				"slaves": []string{"eth0"},
+				"bond-slaves": []string{"eth0"},
 			},
 		},
 	}
@@ -255,6 +313,7 @@ func TestBuildInterfacesBlindBond(t *testing.T) {
 			configDepth: 1,
 		},
 		[]string{"eth0"},
+		map[string]string{},
 	}
 	eth0 := &physicalInterface{
 		logicalInterface{
@@ -323,7 +382,9 @@ func TestBuildInterfaces(t *testing.T) {
 			auto:         false,
 			configMethod: configMethodManual{},
 			options: map[string][]string{
-				"slaves": []string{"eth0"},
+				"bond-slaves": []string{"eth0"},
+				"bond-mode":   []string{"4"},
+				"bond-miimon": []string{"100"},
 			},
 		},
 		&stanzaInterface{
@@ -332,7 +393,7 @@ func TestBuildInterfaces(t *testing.T) {
 			auto:         false,
 			configMethod: configMethodManual{},
 			options: map[string][]string{
-				"slaves": []string{"bond0"},
+				"bond-slaves": []string{"bond0"},
 			},
 		},
 		&stanzaInterface{
@@ -385,6 +446,7 @@ func TestBuildInterfaces(t *testing.T) {
 			configDepth: 2,
 		},
 		[]string{"bond0"},
+		map[string]string{},
 	}
 	bond0 := &bondInterface{
 		logicalInterface{
@@ -394,6 +456,10 @@ func TestBuildInterfaces(t *testing.T) {
 			configDepth: 1,
 		},
 		[]string{"eth0"},
+		map[string]string{
+			"mode":   "4",
+			"miimon": "100",
+		},
 	}
 	eth0 := &physicalInterface{
 		logicalInterface{

network/stanza.go

@@ -293,7 +293,6 @@ func parseHwaddress(options map[string][]string, iface string) (net.HardwareAddr
 }
 
 func parseBondStanza(iface string, conf configMethod, attributes []string, options map[string][]string) (*stanzaInterface, error) {
-	options["slaves"] = options["bond-slaves"]
 	return &stanzaInterface{name: iface, kind: interfaceBond, configMethod: conf, options: options}, nil
 }
 

network/stanza_test.go

@@ -129,7 +129,7 @@ func TestParseBondStanzaNoSlaves(t *testing.T) {
 	if err != nil {
 		t.FailNow()
 	}
-	if bond.options["slaves"] != nil {
+	if bond.options["bond-slaves"] != nil {
 		t.FailNow()
 	}
 }
@@ -152,9 +152,6 @@ func TestParseBondStanza(t *testing.T) {
 	if bond.configMethod != conf {
 		t.FailNow()
 	}
-	if !reflect.DeepEqual(bond.options["slaves"], options["bond-slaves"]) {
-		t.FailNow()
-	}
 }
 
 func TestParsePhysicalStanza(t *testing.T) {

system/networkd.go

@@ -4,8 +4,11 @@ import (
 	"fmt"
 	"io/ioutil"
 	"net"
+	"os"
 	"os/exec"
 	"path"
+	"strings"
+	"time"
 
 	"github.com/coreos/coreos-cloudinit/network"
 	"github.com/coreos/coreos-cloudinit/third_party/github.com/dotcloud/docker/pkg/netlink"
@@ -17,6 +20,13 @@ const (
 
 func RestartNetwork(interfaces []network.InterfaceGenerator) (err error) {
 	defer func() {
+		if e := restartNetworkd(); e != nil {
+			err = e
+			return
+		}
+		// TODO(crawford): Get rid of this once networkd fixes the race
+		// https://bugs.freedesktop.org/show_bug.cgi?id=76077
+		time.Sleep(5 * time.Second)
 		if e := restartNetworkd(); e != nil {
 			err = e
 		}
@@ -26,10 +36,10 @@ func RestartNetwork(interfaces []network.InterfaceGenerator) (err error) {
 		return
 	}
 
-	if err = probe8012q(); err != nil {
+	if err = maybeProbe8012q(interfaces); err != nil {
 		return
 	}
-	return
+	return maybeProbeBonding(interfaces)
 }
 
 func downNetworkInterfaces(interfaces []network.InterfaceGenerator) error {
@@ -55,9 +65,25 @@ func downNetworkInterfaces(interfaces []network.InterfaceGenerator) error {
 	return nil
 }
 
-func probe8012q() error {
+func maybeProbe8012q(interfaces []network.InterfaceGenerator) error {
+	for _, iface := range interfaces {
+		if iface.Type() == "vlan" {
 			return exec.Command("modprobe", "8021q").Run()
 		}
+	}
+	return nil
+}
+
+func maybeProbeBonding(interfaces []network.InterfaceGenerator) error {
+	args := []string{"bonding"}
+	for _, iface := range interfaces {
+		if iface.Type() == "bond" {
+			args = append(args, strings.Split(iface.ModprobeParams(), " ")...)
+			break
+		}
+	}
+	return exec.Command("modprobe", args...).Run()
+}
 
 func restartNetworkd() error {
 	_, err := RunUnitCommand("restart", "systemd-networkd.service")
@@ -86,6 +112,8 @@ func writeConfig(filename string, config string) error {
 	if config == "" {
 		return nil
 	}
-
+	if err := os.MkdirAll(path.Dir(filename), 0755); err != nil {
+		return err
+	}
 	return ioutil.WriteFile(filename, []byte(config), 0444)
 }