VOL-1967 move api-server to separate repository
Current with voltha-go acf0adaf2d91ae72b55192cc8a939e0485918d16
Change-Id: I000ea6be0789e20c922bd671562b58a7120892ae
diff --git a/cmd/arouterd/arouterd.go b/cmd/arouterd/arouterd.go
new file mode 100644
index 0000000..2c6b31e
--- /dev/null
+++ b/cmd/arouterd/arouterd.go
@@ -0,0 +1,448 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package main
+
+import (
+ "errors"
+ "flag"
+ "fmt"
+ "google.golang.org/grpc/connectivity"
+ "google.golang.org/grpc/keepalive"
+ "k8s.io/api/core/v1"
+ "math"
+ "os"
+ "path"
+ "regexp"
+ "strconv"
+ "time"
+
+ "github.com/golang/protobuf/ptypes"
+ "github.com/golang/protobuf/ptypes/empty"
+ "github.com/opencord/voltha-go/common/log"
+ "github.com/opencord/voltha-go/common/version"
+ "github.com/opencord/voltha-go/kafka"
+ pb "github.com/opencord/voltha-protos/go/afrouter"
+ cmn "github.com/opencord/voltha-protos/go/common"
+ ic "github.com/opencord/voltha-protos/go/inter_container"
+ vpb "github.com/opencord/voltha-protos/go/voltha"
+ "golang.org/x/net/context"
+ "google.golang.org/grpc"
+ metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+ "k8s.io/client-go/kubernetes"
+ "k8s.io/client-go/rest"
+ "k8s.io/client-go/tools/clientcmd"
+)
+
+type volthaPod struct {
+ name string
+ ipAddr string
+ node string
+ devIds map[string]struct{}
+ backend string
+ connection string
+}
+
+type Configuration struct {
+ DisplayVersionOnly *bool
+}
+
+var (
+ // if k8s variables are undefined, will attempt to use in-cluster config
+ k8sApiServer = getStrEnv("K8S_API_SERVER", "")
+ k8sKubeConfigPath = getStrEnv("K8S_KUBE_CONFIG_PATH", "")
+
+ podNamespace = getStrEnv("POD_NAMESPACE", "voltha")
+ podLabelSelector = getStrEnv("POD_LABEL_SELECTOR", "app=rw-core")
+ podAffinityGroupLabel = getStrEnv("POD_AFFINITY_GROUP_LABEL", "affinity-group")
+
+ podGrpcPort = uint64(getIntEnv("POD_GRPC_PORT", 0, math.MaxUint16, 50057))
+
+ afrouterApiAddress = getStrEnv("AFROUTER_API_ADDRESS", "localhost:55554")
+
+ afrouterRouterName = getStrEnv("AFROUTER_ROUTER_NAME", "vcore")
+ afrouterRouteName = getStrEnv("AFROUTER_ROUTE_NAME", "dev_manager")
+ afrouterRWClusterName = getStrEnv("AFROUTER_RW_CLUSTER_NAME", "vcore")
+
+ kafkaTopic = getStrEnv("KAFKA_TOPIC", "AffinityRouter")
+ kafkaClientType = getStrEnv("KAFKA_CLIENT_TYPE", "sarama")
+ kafkaHost = getStrEnv("KAFKA_HOST", "kafka")
+ kafkaPort = getIntEnv("KAFKA_PORT", 0, math.MaxUint16, 9092)
+ kafkaInstanceID = getStrEnv("KAFKA_INSTANCE_ID", "arouterd")
+)
+
+func getIntEnv(key string, min, max, defaultValue int) int {
+ if val, have := os.LookupEnv(key); have {
+ num, err := strconv.Atoi(val)
+ if err != nil || !(min <= num && num <= max) {
+ panic(fmt.Errorf("%s must be a number in the range [%d, %d]; default: %d", key, min, max, defaultValue))
+ }
+ return num
+ }
+ return defaultValue
+}
+
+func getStrEnv(key, defaultValue string) string {
+ if val, have := os.LookupEnv(key); have {
+ return val
+ }
+ return defaultValue
+}
+
+func newKafkaClient(clientType string, host string, port int, instanceID string) (kafka.Client, error) {
+ log.Infow("kafka-client-type", log.Fields{"client": clientType})
+ switch clientType {
+ case "sarama":
+ return kafka.NewSaramaClient(
+ kafka.Host(host),
+ kafka.Port(port),
+ kafka.ConsumerType(kafka.GroupCustomer),
+ kafka.ProducerReturnOnErrors(true),
+ kafka.ProducerReturnOnSuccess(true),
+ kafka.ProducerMaxRetries(6),
+ kafka.NumPartitions(3),
+ kafka.ConsumerGroupName(instanceID),
+ kafka.ConsumerGroupPrefix(instanceID),
+ kafka.AutoCreateTopic(false),
+ kafka.ProducerFlushFrequency(5),
+ kafka.ProducerRetryBackoff(time.Millisecond*30)), nil
+ }
+ return nil, errors.New("unsupported-client-type")
+}
+
+func k8sClientSet() *kubernetes.Clientset {
+ var config *rest.Config
+ if k8sApiServer != "" || k8sKubeConfigPath != "" {
+ // use combination of URL & local kube-config file
+ c, err := clientcmd.BuildConfigFromFlags(k8sApiServer, k8sKubeConfigPath)
+ if err != nil {
+ panic(err)
+ }
+ config = c
+ } else {
+ // use in-cluster config
+ c, err := rest.InClusterConfig()
+ if err != nil {
+ log.Errorf("Unable to load in-cluster config. Try setting K8S_API_SERVER and K8S_KUBE_CONFIG_PATH?")
+ panic(err)
+ }
+ config = c
+ }
+ // creates the clientset
+ clientset, err := kubernetes.NewForConfig(config)
+ if err != nil {
+ panic(err)
+ }
+
+ return clientset
+}
+
+func connect(ctx context.Context, addr string) (*grpc.ClientConn, error) {
+ log.Debugf("Trying to connect to %s", addr)
+ conn, err := grpc.DialContext(ctx, addr,
+ grpc.WithInsecure(),
+ grpc.WithBlock(),
+ grpc.WithBackoffMaxDelay(time.Second*5),
+ grpc.WithKeepaliveParams(keepalive.ClientParameters{Time: time.Second * 10, Timeout: time.Second * 5}))
+ if err == nil {
+ log.Debugf("Connection succeeded")
+ }
+ return conn, err
+}
+
+func getVolthaPods(cs *kubernetes.Clientset) ([]*volthaPod, error) {
+ pods, err := cs.CoreV1().Pods(podNamespace).List(metav1.ListOptions{LabelSelector: podLabelSelector})
+ if err != nil {
+ return nil, err
+ }
+
+ var rwPods []*volthaPod
+items:
+ for _, v := range pods.Items {
+ // only pods that are actually running should be considered
+ if v.Status.Phase == v1.PodRunning {
+ for _, condition := range v.Status.Conditions {
+ if condition.Status != v1.ConditionTrue {
+ continue items
+ }
+ }
+
+ if group, have := v.Labels[podAffinityGroupLabel]; have {
+ log.Debugf("Namespace: %s, PodName: %s, PodIP: %s, Host: %s\n", v.Namespace, v.Name, v.Status.PodIP, v.Spec.NodeName)
+ rwPods = append(rwPods, &volthaPod{
+ name: v.Name,
+ ipAddr: v.Status.PodIP,
+ node: v.Spec.NodeName,
+ devIds: make(map[string]struct{}),
+ backend: afrouterRWClusterName + group,
+ })
+ } else {
+ log.Warnf("Pod %s found matching % without label %", v.Name, podLabelSelector, podAffinityGroupLabel)
+ }
+ }
+ }
+ return rwPods, nil
+}
+
+func reconcilePodDeviceIds(ctx context.Context, pod *volthaPod, ids map[string]struct{}) {
+ ctxTimeout, _ := context.WithTimeout(ctx, time.Second*5)
+ conn, err := connect(ctxTimeout, fmt.Sprintf("%s:%d", pod.ipAddr, podGrpcPort))
+ if err != nil {
+ log.Debugf("Could not reconcile devices from %s, could not connect: %s", pod.name, err)
+ return
+ }
+ defer conn.Close()
+
+ var idList cmn.IDs
+ for k := range ids {
+ idList.Items = append(idList.Items, &cmn.ID{Id: k})
+ }
+
+ client := vpb.NewVolthaServiceClient(conn)
+ _, err = client.ReconcileDevices(ctx, &idList)
+ if err != nil {
+ log.Errorf("Attempt to reconcile ids on pod %s failed: %s", pod.name, err)
+ return
+ }
+}
+
+func queryPodDeviceIds(ctx context.Context, pod *volthaPod) map[string]struct{} {
+ ctxTimeout, _ := context.WithTimeout(ctx, time.Second*5)
+ conn, err := connect(ctxTimeout, fmt.Sprintf("%s:%d", pod.ipAddr, podGrpcPort))
+ if err != nil {
+ log.Debugf("Could not query devices from %s, could not connect: %s", pod.name, err)
+ return nil
+ }
+ defer conn.Close()
+
+ client := vpb.NewVolthaServiceClient(conn)
+ devs, err := client.ListDeviceIds(ctx, &empty.Empty{})
+ if err != nil {
+ log.Error(err)
+ return nil
+ }
+
+ var ret = make(map[string]struct{})
+ for _, dv := range devs.Items {
+ ret[dv.Id] = struct{}{}
+ }
+ return ret
+}
+
+func setAffinity(ctx context.Context, client pb.ConfigurationClient, deviceId string, backend string) {
+ log.Debugf("Configuring backend %s with device id %s \n", backend, deviceId)
+ if res, err := client.SetAffinity(ctx, &pb.Affinity{
+ Router: afrouterRouterName,
+ Route: afrouterRouteName,
+ Cluster: afrouterRWClusterName,
+ Backend: backend,
+ Id: deviceId,
+ }); err != nil {
+ log.Debugf("failed affinity RPC call: %s\n", err)
+ } else {
+ log.Debugf("Result: %v\n", res)
+ }
+}
+
+func monitorDiscovery(kc kafka.Client, ctx context.Context, client pb.ConfigurationClient, ch <-chan *ic.InterContainerMessage, doneCh chan<- struct{}) {
+ defer close(doneCh)
+ defer kc.Stop()
+
+monitorLoop:
+ for {
+ select {
+ case <-ctx.Done():
+ break monitorLoop
+ case msg := <-ch:
+ log.Debug("Received a device discovery notification")
+ device := &ic.DeviceDiscovered{}
+ if err := ptypes.UnmarshalAny(msg.Body, device); err != nil {
+ log.Errorf("Could not unmarshal received notification %v", msg)
+ } else {
+ // somewhat hackish solution, backend is known from the first digit found in the publisher name
+ group := regexp.MustCompile(`\d`).FindString(device.Publisher)
+ if group != "" {
+ // set the affinity of the discovered device
+ setAffinity(ctx, client, device.Id, afrouterRWClusterName+group)
+ } else {
+ log.Error("backend is unknown")
+ }
+ }
+ }
+ }
+}
+
+func startDiscoveryMonitor(ctx context.Context, client pb.ConfigurationClient) (<-chan struct{}, error) {
+ doneCh := make(chan struct{})
+ // Connect to kafka for discovery events
+ kc, err := newKafkaClient(kafkaClientType, kafkaHost, kafkaPort, kafkaInstanceID)
+ if err != nil {
+ panic(err)
+ }
+
+ for {
+ if err := kc.Start(); err != nil {
+ log.Error("Could not connect to kafka")
+ } else {
+ break
+ }
+ select {
+ case <-ctx.Done():
+ close(doneCh)
+ return doneCh, errors.New("GRPC context done")
+
+ case <-time.After(5 * time.Second):
+ }
+ }
+ ch, err := kc.Subscribe(&kafka.Topic{Name: kafkaTopic})
+ if err != nil {
+ log.Errorf("Could not subscribe to the '%s' channel, discovery disabled", kafkaTopic)
+ close(doneCh)
+ kc.Stop()
+ return doneCh, err
+ }
+
+ go monitorDiscovery(kc, ctx, client, ch, doneCh)
+ return doneCh, nil
+}
+
+// coreMonitor polls the list of devices from all RW cores, pushes these devices
+// into the affinity router, and ensures that all cores in a backend have their devices synced
+func coreMonitor(ctx context.Context, client pb.ConfigurationClient, clientset *kubernetes.Clientset) {
+ // map[backend]map[deviceId]struct{}
+ deviceOwnership := make(map[string]map[string]struct{})
+loop:
+ for {
+ // get the rw core list from k8s
+ rwPods, err := getVolthaPods(clientset)
+ if err != nil {
+ log.Error(err)
+ continue
+ }
+
+ // for every pod
+ for _, pod := range rwPods {
+ // get the devices for this pod's backend
+ devices, have := deviceOwnership[pod.backend]
+ if !have {
+ devices = make(map[string]struct{})
+ deviceOwnership[pod.backend] = devices
+ }
+
+ coreDevices := queryPodDeviceIds(ctx, pod)
+
+ // handle devices that exist in the core, but we have just learned about
+ for deviceId := range coreDevices {
+ // if there's a new device
+ if _, have := devices[deviceId]; !have {
+ // add the device to our local list
+ devices[deviceId] = struct{}{}
+ // push the device into the affinity router
+ setAffinity(ctx, client, deviceId, pod.backend)
+ }
+ }
+
+ // ensure that the core knows about all devices in its backend
+ toSync := make(map[string]struct{})
+ for deviceId := range devices {
+ // if the pod is missing any devices
+ if _, have := coreDevices[deviceId]; !have {
+ // we will reconcile them
+ toSync[deviceId] = struct{}{}
+ }
+ }
+
+ if len(toSync) != 0 {
+ reconcilePodDeviceIds(ctx, pod, toSync)
+ }
+ }
+
+ select {
+ case <-ctx.Done():
+ // if we're done, exit
+ break loop
+ case <-time.After(10 * time.Second): // wait a while
+ }
+ }
+}
+
+// endOnClose cancels the context when the connection closes
+func connectionActiveContext(conn *grpc.ClientConn) context.Context {
+ ctx, disconnected := context.WithCancel(context.Background())
+ go func() {
+ for state := conn.GetState(); state != connectivity.TransientFailure && state != connectivity.Shutdown; state = conn.GetState() {
+ if !conn.WaitForStateChange(context.Background(), state) {
+ break
+ }
+ }
+ log.Infof("Connection to afrouter lost")
+ disconnected()
+ }()
+ return ctx
+}
+
+func main() {
+ config := &Configuration{}
+ cmdParse := flag.NewFlagSet(path.Base(os.Args[0]), flag.ContinueOnError)
+ config.DisplayVersionOnly = cmdParse.Bool("version", false, "Print version information and exit")
+
+ if err := cmdParse.Parse(os.Args[1:]); err != nil {
+ fmt.Printf("Error: %v\n", err)
+ os.Exit(1)
+ }
+
+ if *config.DisplayVersionOnly {
+ fmt.Println("VOLTHA API Server (afrouterd)")
+ fmt.Println(version.VersionInfo.String(" "))
+ return
+ }
+
+ // Set up logging
+ if _, err := log.SetDefaultLogger(log.JSON, 0, nil); err != nil {
+ log.With(log.Fields{"error": err}).Fatal("Cannot setup logging")
+ }
+
+ // Set up kubernetes api
+ clientset := k8sClientSet()
+
+ for {
+ // Connect to the affinity router
+ conn, err := connect(context.Background(), afrouterApiAddress) // This is a sidecar container so communicating over localhost
+ if err != nil {
+ panic(err)
+ }
+
+ // monitor the connection status, end context if connection is lost
+ ctx := connectionActiveContext(conn)
+
+ // set up the client
+ client := pb.NewConfigurationClient(conn)
+
+ // start the discovery monitor and core monitor
+ // these two processes do the majority of the work
+
+ log.Info("Starting discovery monitoring")
+ doneCh, _ := startDiscoveryMonitor(ctx, client)
+
+ log.Info("Starting core monitoring")
+ coreMonitor(ctx, client, clientset)
+
+ //ensure the discovery monitor to quit
+ <-doneCh
+
+ conn.Close()
+ }
+}