14 "github.com/sirupsen/logrus"
15 "github.com/urfave/cli"
17 "github.com/containernetworking/cni/pkg/skel"
18 "github.com/containernetworking/cni/pkg/types"
19 "github.com/containernetworking/cni/pkg/types/current"
20 "github.com/containernetworking/cni/pkg/version"
21 "k8s.io/apimachinery/pkg/util/wait"
23 "ovn4nfv-k8s-plugin/internal/pkg/kube"
25 "ovn4nfv-k8s-plugin/cmd/ovn4nfvk8s-cni/app"
26 "ovn4nfv-k8s-plugin/internal/pkg/config"
30 ovn4nfvAnnotationTag = "k8s.plugin.opnfv.org/ovnInterfaces"
33 func argString2Map(args string) (map[string]string, error) {
34 argsMap := make(map[string]string)
36 pairs := strings.Split(args, ";")
37 for _, pair := range pairs {
38 kv := strings.Split(pair, "=")
40 return nil, fmt.Errorf("ARGS: invalid pair %q", pair)
44 argsMap[keyString] = valueString
50 func parseOvnNetworkObject(ovnnetwork string) ([]map[string]string, error) {
51 var ovnNet []map[string]string
54 return nil, fmt.Errorf("parseOvnNetworkObject:error")
57 if err := json.Unmarshal([]byte(ovnnetwork), &ovnNet); err != nil {
58 return nil, fmt.Errorf("parseOvnNetworkObject: failed to load ovn network err: %v | ovn network: %v", err, ovnnetwork)
64 func mergeWithResult(srcObj, dstObj types.Result) (types.Result, error) {
69 src, err := current.NewResultFromResult(srcObj)
71 return nil, fmt.Errorf("Couldn't convert old result to current version: %v", err)
73 dst, err := current.NewResultFromResult(dstObj)
75 return nil, fmt.Errorf("Couldn't convert old result to current version: %v", err)
78 ifacesLength := len(dst.Interfaces)
80 for _, iface := range src.Interfaces {
81 dst.Interfaces = append(dst.Interfaces, iface)
83 for _, ip := range src.IPs {
84 if ip.Interface != nil && *(ip.Interface) != -1 {
85 ip.Interface = current.Int(*(ip.Interface) + ifacesLength)
87 dst.IPs = append(dst.IPs, ip)
89 for _, route := range src.Routes {
90 dst.Routes = append(dst.Routes, route)
93 for _, ns := range src.DNS.Nameservers {
94 dst.DNS.Nameservers = append(dst.DNS.Nameservers, ns)
96 for _, s := range src.DNS.Search {
97 dst.DNS.Search = append(dst.DNS.Search, s)
99 for _, opt := range src.DNS.Options {
100 dst.DNS.Options = append(dst.DNS.Options, opt)
102 // TODO: what about DNS.domain?
106 func prettyPrint(i interface{}) string {
107 s, _ := json.MarshalIndent(i, "", "\t")
111 func addMultipleInterfaces(args *skel.CmdArgs, ovnAnnotation, namespace, podName string) types.Result {
112 logrus.Infof("ovn4nfvk8s-cni: addMultipleInterfaces ")
114 var ovnAnnotatedMap []map[string]string
115 ovnAnnotatedMap, err := parseOvnNetworkObject(ovnAnnotation)
117 logrus.Errorf("addLogicalPort : Error Parsing Ovn Network List %v %v", ovnAnnotatedMap, err)
120 if namespace == "" || podName == "" {
121 logrus.Errorf("required CNI variable missing")
124 var interfacesArray []*current.Interface
126 var result *current.Result
127 var dstResult types.Result
128 for _, ovnNet := range ovnAnnotatedMap {
129 ipAddress := ovnNet["ip_address"]
130 macAddress := ovnNet["mac_address"]
131 gatewayIP := ovnNet["gateway_ip"]
132 defaultGateway := ovnNet["defaultGateway"]
134 if ipAddress == "" || macAddress == "" {
135 logrus.Errorf("failed in pod annotation key extract")
140 interfaceName := ovnNet["interface"]
141 if interfaceName == "" {
142 logrus.Errorf("addMultipleInterfaces: interface can't be null")
145 interfacesArray, err = app.ConfigureInterface(args, namespace, podName, macAddress, ipAddress, gatewayIP, interfaceName, defaultGateway, index, config.Default.MTU)
147 logrus.Errorf("Failed to configure interface in pod: %v", err)
150 addr, addrNet, err := net.ParseCIDR(ipAddress)
152 logrus.Errorf("failed to parse IP address %q: %v", ipAddress, err)
156 if addr.To4() != nil {
159 var routes types.Route
160 if defaultGateway == "true" {
161 defaultAddr, defaultAddrNet, _ := net.ParseCIDR("0.0.0.0/0")
162 routes = types.Route{Dst: net.IPNet{IP: defaultAddr, Mask: defaultAddrNet.Mask}, GW: net.ParseIP(gatewayIP)}
164 result = ¤t.Result{
165 Interfaces: interfacesArray,
166 IPs: []*current.IPConfig{
169 Interface: current.Int(1),
170 Address: net.IPNet{IP: addr, Mask: addrNet.Mask},
171 Gateway: net.ParseIP(gatewayIP),
174 Routes: []*types.Route{&routes},
177 result = ¤t.Result{
178 Interfaces: interfacesArray,
179 IPs: []*current.IPConfig{
182 Interface: current.Int(1),
183 Address: net.IPNet{IP: addr, Mask: addrNet.Mask},
184 Gateway: net.ParseIP(gatewayIP),
190 // Build the result structure to pass back to the runtime
191 dstResult, err = mergeWithResult(types.Result(result), dstResult)
193 logrus.Errorf("Failed to merge results: %v", err)
197 logrus.Infof("addMultipleInterfaces: %s", prettyPrint(dstResult))
201 func addRoutes(args *skel.CmdArgs, ovnAnnotation string, dstResult types.Result) types.Result {
202 logrus.Infof("ovn4nfvk8s-cni: addRoutes ")
204 var ovnAnnotatedMap []map[string]string
205 ovnAnnotatedMap, err := parseOvnNetworkObject(ovnAnnotation)
207 logrus.Errorf("addLogicalPort : Error Parsing Ovn Route List %v", err)
211 var result types.Result
212 var routes []*types.Route
213 for _, ovnNet := range ovnAnnotatedMap {
217 if dst == "" || gw == "" || dev == "" {
218 logrus.Errorf("failed in pod annotation key extract")
221 err = app.ConfigureRoute(args, dst, gw, dev)
223 logrus.Errorf("Failed to configure interface in pod: %v", err)
226 dstAddr, dstAddrNet, _ := net.ParseCIDR(dst)
227 routes = append(routes, &types.Route{
228 Dst: net.IPNet{IP: dstAddr, Mask: dstAddrNet.Mask},
233 result = ¤t.Result{
236 // Build the result structure to pass back to the runtime
237 dstResult, err = mergeWithResult(result, dstResult)
239 logrus.Errorf("Failed to merge results: %v", err)
242 logrus.Infof("addRoutes: %s", prettyPrint(dstResult))
247 func cmdAdd(args *skel.CmdArgs) error {
248 logrus.Infof("ovn4nfvk8s-cni: cmdAdd ")
249 conf := &types.NetConf{}
250 if err := json.Unmarshal(args.StdinData, conf); err != nil {
251 return fmt.Errorf("failed to load netconf: %v", err)
254 argsMap, err := argString2Map(args.Args)
259 namespace := argsMap["K8S_POD_NAMESPACE"]
260 podName := argsMap["K8S_POD_NAME"]
261 if namespace == "" || podName == "" {
262 return fmt.Errorf("required CNI variable missing")
265 clientset, err := config.NewClientset(&config.Kubernetes)
267 return fmt.Errorf("Could not create clientset for kubernetes: %v", err)
269 kubecli := &kube.Kube{KClient: clientset}
271 // Get the IP address and MAC address from the API server.
272 var annotationBackoff = wait.Backoff{Duration: 1 * time.Second, Steps: 14, Factor: 1.5, Jitter: 0.1}
273 var annotation map[string]string
274 if err := wait.ExponentialBackoff(annotationBackoff, func() (bool, error) {
275 annotation, err = kubecli.GetAnnotationsOnPod(namespace, podName)
277 // TODO: check if err is non recoverable
278 logrus.Warningf("Error while obtaining pod annotations - %v", err)
281 if _, ok := annotation[ovn4nfvAnnotationTag]; ok {
286 return fmt.Errorf("failed to get pod annotation - %v", err)
288 logrus.Infof("ovn4nfvk8s-cni: Annotation Found ")
289 ovnAnnotation, ok := annotation[ovn4nfvAnnotationTag]
291 return fmt.Errorf("Error while obtaining pod annotations")
293 result := addMultipleInterfaces(args, ovnAnnotation, namespace, podName)
294 // Add Routes to the pod if annotation found for routes
295 ovnRouteAnnotation, ok := annotation["ovnNetworkRoutes"]
297 logrus.Infof("ovn4nfvk8s-cni: ovnNetworkRoutes Annotation Found %+v", ovnRouteAnnotation)
298 result = addRoutes(args, ovnRouteAnnotation, result)
301 return result.Print()
304 func cmdDel(args *skel.CmdArgs) error {
305 logrus.Infof("ovn4nfvk8s-cni: cmdDel ")
306 for i := 0; i < 10; i++ {
307 ifaceName := args.ContainerID[:14] + strconv.Itoa(i)
308 done, err := app.PlatformSpecificCleanup(ifaceName)
310 logrus.Errorf("Teardown error: %v", err)
320 logrus.Infof("ovn4nfvk8s-cni invoked")
322 c.Name = "ovn4nfvk8s-cni"
323 c.Usage = "a CNI plugin to set up or tear down a additional interfaces with OVN"
325 c.Flags = config.Flags
327 c.Action = func(ctx *cli.Context) error {
328 if _, err := config.InitConfig(ctx); err != nil {
332 skel.PluginMain(cmdAdd, nil, cmdDel, version.All, "")
336 if err := c.Run(os.Args); err != nil {
337 // Print the error to stdout in conformance with the CNI spec
338 e, ok := err.(*types.Error)
340 e = &types.Error{Code: 100, Msg: err.Error()}