forked from cisco-app-networking/networkservicemesh
/
nse.go
323 lines (259 loc) · 8.7 KB
/
nse.go
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package registryserver
import (
"os"
"strings"
"time"
"github.com/adodon2go/networkservicemesh/pkg/tools/spanhelper"
"github.com/adodon2go/networkservicemesh/controlplane/pkg/serviceregistry"
"github.com/pkg/errors"
"github.com/adodon2go/networkservicemesh/controlplane/pkg/nsmd"
"github.com/golang/protobuf/ptypes/empty"
"golang.org/x/net/context"
"github.com/adodon2go/networkservicemesh/controlplane/api/registry"
v1 "github.com/adodon2go/networkservicemesh/k8s/pkg/apis/networkservice/v1alpha1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
const (
// ForwardingTimeout - Timeout waiting for Proxy NseRegistryClient
ForwardingTimeout = 15 * time.Second
// ProxyRegistryReconnectInterval - reconnect interval to Proxy NSMD-K8S if connection refused
ProxyRegistryReconnectInterval = 15 * time.Second
)
type nseRegistryService struct {
nsmName string
cache RegistryCache
}
func newNseRegistryService(nsmName string, cache RegistryCache) *nseRegistryService {
return &nseRegistryService{
nsmName: nsmName,
cache: cache,
}
}
func (rs *nseRegistryService) RegisterNSE(ctx context.Context, request *registry.NSERegistration) (*registry.NSERegistration, error) {
st := time.Now()
span := spanhelper.FromContext(ctx, "nsmgr.RegisterNSE")
defer span.Finish()
logger := span.Logger()
logger.Infof("Received RegisterNSE(%v)", request)
labels := request.GetNetworkServiceEndpoint().GetLabels()
if labels == nil {
labels = make(map[string]string)
}
labels["networkservicename"] = request.GetNetworkService().GetName()
if request.GetNetworkServiceEndpoint() != nil && request.GetNetworkService() != nil {
_, err := rs.cache.AddNetworkService(&v1.NetworkService{
ObjectMeta: metav1.ObjectMeta{
Name: request.NetworkService.GetName(),
},
Spec: v1.NetworkServiceSpec{
Payload: request.NetworkService.GetPayload(),
},
Status: v1.NetworkServiceStatus{},
})
if err != nil {
logger.Errorf("Failed to register nsm: %s", err)
return nil, err
}
var objectMeta metav1.ObjectMeta
if request.GetNetworkServiceEndpoint().GetName() == "" {
objectMeta = metav1.ObjectMeta{
GenerateName: request.GetNetworkService().GetName(),
Labels: labels,
}
} else {
objectMeta = metav1.ObjectMeta{
Name: request.GetNetworkServiceEndpoint().GetName(),
Labels: labels,
}
}
nseResponse, err := rs.cache.AddNetworkServiceEndpoint(&v1.NetworkServiceEndpoint{
ObjectMeta: objectMeta,
Spec: v1.NetworkServiceEndpointSpec{
NetworkServiceName: request.GetNetworkService().GetName(),
Payload: request.GetNetworkService().GetPayload(),
NsmName: rs.nsmName,
},
Status: v1.NetworkServiceEndpointStatus{
State: v1.RUNNING,
},
})
if err != nil {
return nil, err
}
request.NetworkServiceEndpoint = mapNseFromCustomResource(nseResponse)
nsm, err := rs.cache.GetNetworkServiceManager(rs.nsmName)
if err != nil {
return nil, err
}
request.NetworkServiceManager = mapNsmFromCustomResource(nsm)
go func() {
if forwardErr := rs.forwardRegisterNSE(context.Background(), request); forwardErr != nil {
logger.Errorf("Cannot forward NSE Registration: %v", forwardErr)
}
}()
}
logger.Infof("Returned from RegisterNSE: time: %v request: %v", time.Since(st), request)
return request, nil
}
func (rs *nseRegistryService) BulkRegisterNSE(srv registry.NetworkServiceRegistry_BulkRegisterNSEServer) error {
span := spanhelper.FromContext(srv.Context(), "ProxyNsmgr.BulkRegisterNSE")
defer span.Finish()
logger := span.Logger()
logger.Infof("Forwarding Bulk Register NSE stream...")
nsrURL := os.Getenv(ProxyNsmdK8sAddressEnv)
if strings.TrimSpace(nsrURL) == "" {
nsrURL = ProxyNsmdK8sAddressDefaults
}
ctx, cancel := context.WithCancel(span.Context())
defer cancel()
remoteRegistry := nsmd.NewServiceRegistryAt(nsrURL)
defer remoteRegistry.Stop()
for {
stream, err := requestBulkRegisterNSEStream(ctx, remoteRegistry, nsrURL)
if err != nil {
logger.Warnf("Cannot connect to Proxy NSMGR %s : %v", nsrURL, err)
<-time.After(ProxyRegistryReconnectInterval)
continue
}
for {
request, err := srv.Recv()
if err != nil {
err = errors.Wrapf(err, "error receiving BulkRegisterNSE request : %v", err)
return err
}
logger.Infof("Forward BulkRegisterNSE request: %v", request)
err = stream.Send(request)
if err != nil {
logger.Warnf("Error forwarding BulkRegisterNSE request to %s : %v", nsrURL, err)
break
}
}
<-time.After(ProxyRegistryReconnectInterval)
}
}
func requestBulkRegisterNSEStream(ctx context.Context, remoteRegistry serviceregistry.ServiceRegistry, nsrURL string) (registry.NetworkServiceRegistry_BulkRegisterNSEClient, error) {
nseRegistryClient, err := remoteRegistry.NseRegistryClient(ctx)
if err != nil {
err = errors.Wrapf(err, "error forwarding BulkRegisterNSE request to %s : %v", nsrURL, err)
return nil, err
}
stream, err := nseRegistryClient.BulkRegisterNSE(ctx)
if err != nil {
err = errors.Wrapf(err, "error forwarding BulkRegisterNSE request to %s : %v", nsrURL, err)
return nil, err
}
return stream, nil
}
func (rs *nseRegistryService) RemoveNSE(ctx context.Context, request *registry.RemoveNSERequest) (*empty.Empty, error) {
st := time.Now()
span := spanhelper.FromContext(ctx, "ProxyNsmgr.BulkRegisterNSE")
defer span.Finish()
logger := span.Logger()
logger.Infof("Received RemoveNSE(%v)", request)
if err := rs.cache.DeleteNetworkServiceEndpoint(request.GetNetworkServiceEndpointName()); err != nil {
return nil, err
}
go func() {
if forwardErr := rs.forwardRemoveNSE(context.Background(), request); forwardErr != nil {
logger.Errorf("Cannot forward Remove NSE: %v", forwardErr)
}
}()
logger.Infof("RemoveNSE done: time %v", time.Since(st))
return &empty.Empty{}, nil
}
func (rs *nseRegistryService) forwardRegisterNSE(ctx context.Context, request *registry.NSERegistration) error {
span := spanhelper.FromContext(ctx, "ProxyNsmgr.forwardRegisterNSE")
defer span.Finish()
logger := span.Logger()
logger.Infof("Forwarding Register NSE request (%v)", request)
nsrURL := os.Getenv(ProxyNsmdK8sAddressEnv)
if strings.TrimSpace(nsrURL) == "" {
nsrURL = ProxyNsmdK8sAddressDefaults
}
spanCtx, cancel := context.WithTimeout(span.Context(), ForwardingTimeout)
defer cancel()
done := make(chan registry.NetworkServiceRegistryClient)
quit := make(chan error)
remoteRegistry := nsmd.NewServiceRegistryAt(nsrURL)
defer remoteRegistry.Stop()
go func() {
nseRegistryClient, err := remoteRegistry.NseRegistryClient(spanCtx)
if err != nil {
quit <- err
return
}
done <- nseRegistryClient
}()
var nseRegistryClient registry.NetworkServiceRegistryClient
select {
case nseRegistryClient = <-done:
break
case err := <-quit:
return err
case <-time.After(ForwardingTimeout):
return errors.Errorf("timeout requesting NseRegistryClient")
}
service, err := rs.cache.GetNetworkService(request.NetworkService.Name)
if err != nil {
return err
}
request.NetworkService.Payload = service.Spec.Payload
for _, m := range service.Spec.Matches {
var routes []*registry.Destination
for _, r := range m.Routes {
destination := ®istry.Destination{
DestinationSelector: r.DestinationSelector,
Weight: r.Weight,
}
routes = append(routes, destination)
}
match := ®istry.Match{
SourceSelector: m.SourceSelector,
Routes: routes,
}
request.NetworkService.Matches = append(request.NetworkService.Matches, match)
}
_, err = nseRegistryClient.RegisterNSE(spanCtx, request)
if err != nil {
return err
}
return nil
}
func (rs *nseRegistryService) forwardRemoveNSE(ctx context.Context, request *registry.RemoveNSERequest) error {
span := spanhelper.FromContext(ctx, "ProxyNsmgr.forwardRemoveNSE")
defer span.Finish()
logger := span.Logger()
logger.Infof("Forwarding Remove NSE request (%v)", request)
nsrURL := os.Getenv(ProxyNsmdK8sAddressEnv)
if strings.TrimSpace(nsrURL) == "" {
nsrURL = ProxyNsmdK8sAddressDefaults
}
spanCtx, cancel := context.WithTimeout(span.Context(), ForwardingTimeout)
defer cancel()
done := make(chan registry.NetworkServiceRegistryClient)
quit := make(chan error)
remoteRegistry := nsmd.NewServiceRegistryAt(nsrURL)
defer remoteRegistry.Stop()
go func() {
nseRegistryClient, err := remoteRegistry.NseRegistryClient(spanCtx)
if err != nil {
quit <- err
return
}
done <- nseRegistryClient
}()
var nseRegistryClient registry.NetworkServiceRegistryClient
select {
case nseRegistryClient = <-done:
break
case err := <-quit:
return err
case <-time.After(ForwardingTimeout):
return errors.Errorf("timeout requesting NseRegistryClient")
}
_, err := nseRegistryClient.RemoveNSE(spanCtx, request)
if err != nil {
return err
}
return nil
}