Support ips capability in static and mac capability in tuning

This change introduces new capability flag to change MAC address
and to specify IP addresses by tuning and static.

plugins/ipam/static/README.md

@@ -52,3 +52,7 @@ The following [CNI_ARGS](https://github.com/containernetworking/cni/blob/master/
 * `GATEWAY`: request a specific gateway address
 
     (example: CNI_ARGS="IP=10.10.0.1/24;GATEWAY=10.10.0.254")
+
+The plugin also support following [capability argument](https://github.com/containernetworking/cni/blob/master/CONVENTIONS.md).
+
+* `ips`: Pass IP addresses for CNI interface

plugins/ipam/static/main.go

@@ -34,6 +34,10 @@ type Net struct {
 	Name       string      `json:"name"`
 	CNIVersion string      `json:"cniVersion"`
 	IPAM       *IPAMConfig `json:"ipam"`
+
+	RuntimeConfig struct {
+		IPs []string `json:"ips,omitempty"`
+	} `json:"runtimeConfig,omitempty"`
 }
 
 type IPAMConfig struct {
@@ -134,6 +138,14 @@ func LoadIPAMConfig(bytes []byte, envArgs string) (*IPAMConfig, string, error) {
 		return nil, "", err
 	}
 
+	if len(n.RuntimeConfig.IPs) != 0 {
+		// args IP overwrites IP, so clear IPAM Config
+		n.IPAM.Addresses = make([]Address, 0, len(n.RuntimeConfig.IPs))
+		for _, addr := range n.RuntimeConfig.IPs {
+			n.IPAM.Addresses = append(n.IPAM.Addresses, Address{AddressStr: addr})
+		}
+	}
+
 	if n.IPAM == nil {
 		return nil, "", fmt.Errorf("IPAM config missing 'ipam' key")
 	}

plugins/ipam/static/static_test.go

@@ -265,6 +265,75 @@ var _ = Describe("static Operations", func() {
 		})
 		Expect(err).NotTo(HaveOccurred())
 	})
+
+	It("allocates and releases multiple addresses with ADD/DEL, from RuntimeConfig", func() {
+		const ifname string = "eth0"
+		const nspath string = "/some/where"
+
+		conf := `{
+			"cniVersion": "0.3.1",
+			"name": "mynet",
+			"type": "ipvlan",
+			"master": "foo0",
+			"capabilities": {"ips": true},
+			"ipam": {
+				"type": "static",
+				"routes": [
+				{ "dst": "0.0.0.0/0", "gw": "10.10.0.254" },
+				{ "dst": "3ffe:ffff:0:01ff::1/64",
+                                  "gw": "3ffe:ffff:0::1" } ],
+				  "dns": {
+					"nameservers" : ["8.8.8.8"],
+					"domain": "example.com",
+					"search": [ "example.com" ]
+			        }
+			},
+			"RuntimeConfig": {
+				"ips" : ["10.10.0.1/24", "3ffe:ffff:0:01ff::1/64"]
+			}
+		}`
+
+		args := &skel.CmdArgs{
+			ContainerID: "dummy",
+			Netns:       nspath,
+			IfName:      ifname,
+			StdinData:   []byte(conf),
+		}
+
+		// Allocate the IP
+		r, raw, err := testutils.CmdAddWithArgs(args, func() error {
+			return cmdAdd(args)
+		})
+		Expect(err).NotTo(HaveOccurred())
+		Expect(strings.Index(string(raw), "\"version\":")).Should(BeNumerically(">", 0))
+
+		result, err := current.GetResult(r)
+		Expect(err).NotTo(HaveOccurred())
+
+		// Gomega is cranky about slices with different caps
+		Expect(*result.IPs[0]).To(Equal(
+			current.IPConfig{
+				Version: "4",
+				Address: mustCIDR("10.10.0.1/24"),
+			}))
+		Expect(*result.IPs[1]).To(Equal(
+			current.IPConfig{
+				Version: "6",
+				Address: mustCIDR("3ffe:ffff:0:01ff::1/64"),
+			},
+		))
+		Expect(len(result.IPs)).To(Equal(2))
+		Expect(result.Routes).To(Equal([]*types.Route{
+			{Dst: mustCIDR("0.0.0.0/0"), GW: net.ParseIP("10.10.0.254")},
+			{Dst: mustCIDR("3ffe:ffff:0:01ff::1/64"), GW: net.ParseIP("3ffe:ffff:0::1")},
+		}))
+
+		// Release the IP
+		err = testutils.CmdDelWithArgs(args, func() error {
+			return cmdDel(args)
+		})
+		Expect(err).NotTo(HaveOccurred())
+	})
 })
 
 func mustCIDR(s string) net.IPNet {

plugins/meta/tuning/README.md

@@ -61,3 +61,6 @@ The following [CNI_ARGS](https://github.com/containernetworking/cni/blob/master/
 
 Note: You may add `IgnoreUnknown=true` to allow loose CNI argument verification (see CNI's issue[#560](https://github.com/containernetworking/cni/issues/560)).
 
+The plugin also support following [capability argument](https://github.com/containernetworking/cni/blob/master/CONVENTIONS.md).
+
+* `mac`: Pass MAC addresses for CNI interface

plugins/meta/tuning/tuning.go

@@ -43,9 +43,14 @@ type TuningConf struct {
 	Mac     string            `json:"mac,omitempty"`
 	Promisc bool              `json:"promisc,omitempty"`
 	Mtu     int               `json:"mtu,omitempty"`
+
+	RuntimeConfig struct {
+		Mac string `json:"mac,omitempty"`
+	} `json:"runtimeConfig,omitempty"`
 }
 
-type MACEnvArgs struct {
+// MacEnvArgs represents CNI_ARG
+type MacEnvArgs struct {
 	types.CommonArgs
 	MAC types.UnmarshallableString `json:"mac,omitempty"`
 }
@@ -56,9 +61,9 @@ func parseConf(data []byte, envArgs string) (*TuningConf, error) {
 		return nil, fmt.Errorf("failed to load netconf: %v", err)
 	}
 
-	// Parse custom MAC from both env args
+	// Parse custom Mac from both env args
 	if envArgs != "" {
-		e := MACEnvArgs{}
+		e := MacEnvArgs{}
 		err := types.LoadArgs(envArgs, &e)
 		if err != nil {
 			return nil, err
@@ -69,6 +74,11 @@ func parseConf(data []byte, envArgs string) (*TuningConf, error) {
 		}
 	}
 
+	// Parse custom Mac from RuntimeConfig
+	if conf.RuntimeConfig.Mac != "" {
+		conf.Mac = conf.RuntimeConfig.Mac
+	}
+
 	return &conf, nil
 }
 
@@ -230,7 +240,7 @@ func cmdCheck(args *skel.CmdArgs) error {
 
 	err = ns.WithNetNSPath(args.Netns, func(_ ns.NetNS) error {
 		// Check each configured value vs what's currently in the container
-		for key, conf_value := range tuningConf.SysCtl {
+		for key, confValue := range tuningConf.SysCtl {
 			fileName := filepath.Join("/proc/sys", strings.Replace(key, ".", "/", -1))
 			fileName = filepath.Clean(fileName)
 
@@ -238,9 +248,9 @@ func cmdCheck(args *skel.CmdArgs) error {
 			if err != nil {
 				return err
 			}
-			cur_value := strings.TrimSuffix(string(contents), "\n")
+			curValue := strings.TrimSuffix(string(contents), "\n")
-			if conf_value != cur_value {
+			if confValue != curValue {
-				return fmt.Errorf("Error: Tuning configured value of %s is %s, current value is %s", fileName, conf_value, cur_value)
+				return fmt.Errorf("Error: Tuning configured value of %s is %s, current value is %s", fileName, confValue, curValue)
 			}
 		}
 

plugins/meta/tuning/tuning_test.go

@@ -379,6 +379,7 @@ var _ = Describe("tuning plugin", func() {
 			Expect(err).NotTo(HaveOccurred())
 			hw, err := net.ParseMAC("c2:11:22:33:44:66")
 			Expect(err).NotTo(HaveOccurred())
+			fmt.Printf("%v, %v\n", link.Attrs().HardwareAddr, hw)
 			Expect(link.Attrs().HardwareAddr).To(Equal(hw))
 
 			err = testutils.CmdDel(originalNS.Path(),
@@ -681,4 +682,67 @@ var _ = Describe("tuning plugin", func() {
 		})
 		Expect(err).NotTo(HaveOccurred())
 	})
+
+	It("configures and deconfigures mac address (from RuntimeConfig) with ADD/DEL", func() {
+		conf := []byte(`{
+	"name": "test",
+	"type": "iplink",
+	"cniVersion": "0.3.1",
+        "capabilities": {"mac": true},
+        "RuntimeConfig": {
+            "mac": "c2:11:22:33:44:55"
+        },
+	"prevResult": {
+		"interfaces": [
+			{"name": "dummy0", "sandbox":"netns"}
+		],
+		"ips": [
+			{
+				"version": "4",
+				"address": "10.0.0.2/24",
+				"gateway": "10.0.0.1",
+				"interface": 0
+			}
+		]
+	}
+}`)
+
+		args := &skel.CmdArgs{
+			ContainerID: "dummy",
+			Netns:       originalNS.Path(),
+			IfName:      IFNAME,
+			StdinData:   conf,
+		}
+
+		err := originalNS.Do(func(ns.NetNS) error {
+			defer GinkgoRecover()
+
+			r, _, err := testutils.CmdAddWithArgs(args, func() error {
+				return cmdAdd(args)
+			})
+			Expect(err).NotTo(HaveOccurred())
+
+			result, err := current.GetResult(r)
+			Expect(err).NotTo(HaveOccurred())
+
+			Expect(len(result.Interfaces)).To(Equal(1))
+			Expect(result.Interfaces[0].Name).To(Equal(IFNAME))
+			Expect(len(result.IPs)).To(Equal(1))
+			Expect(result.IPs[0].Address.String()).To(Equal("10.0.0.2/24"))
+
+			link, err := netlink.LinkByName(IFNAME)
+			Expect(err).NotTo(HaveOccurred())
+			hw, err := net.ParseMAC("c2:11:22:33:44:55")
+			Expect(err).NotTo(HaveOccurred())
+			Expect(link.Attrs().HardwareAddr).To(Equal(hw))
+
+			err = testutils.CmdDel(originalNS.Path(),
+				args.ContainerID, "", func() error { return cmdDel(args) })
+			Expect(err).NotTo(HaveOccurred())
+
+			return nil
+		})
+		Expect(err).NotTo(HaveOccurred())
+	})
+
 })