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endpoints.go
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endpoints.go
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package endpoints
import (
"context"
"errors"
"net"
workload_pb "github.com/accuknox/go-spiffe/v2/proto/spiffe/workload"
healthv1 "github.com/accuknox/spire/pkg/agent/api/health/v1"
"github.com/accuknox/spire/pkg/agent/endpoints/sdsv2"
"github.com/accuknox/spire/pkg/agent/endpoints/sdsv3"
"github.com/accuknox/spire/pkg/agent/endpoints/workload"
"github.com/accuknox/spire/pkg/common/api/middleware"
"github.com/accuknox/spire/pkg/common/peertracker"
"github.com/accuknox/spire/pkg/common/telemetry"
discovery_v2 "github.com/envoyproxy/go-control-plane/envoy/service/discovery/v2"
secret_v3 "github.com/envoyproxy/go-control-plane/envoy/service/secret/v3"
"github.com/sirupsen/logrus"
"google.golang.org/grpc"
"google.golang.org/grpc/health/grpc_health_v1"
)
type Server interface {
ListenAndServe(ctx context.Context) error
RunTCPAgent(ctx context.Context) error
}
type Endpoints struct {
addr net.Addr
TCPAddr *net.TCPAddr
log logrus.FieldLogger
metrics telemetry.Metrics
workloadAPIServer workload_pb.SpiffeWorkloadAPIServer
sdsv2Server discovery_v2.SecretDiscoveryServiceServer
sdsv3Server secret_v3.SecretDiscoveryServiceServer
healthServer grpc_health_v1.HealthServer
hooks struct {
// test hook used to indicate that is listening
listening chan struct{}
}
}
func New(c Config) *Endpoints {
attestor := PeerTrackerAttestor{Attestor: c.Attestor}
if c.newWorkloadAPIServer == nil {
c.newWorkloadAPIServer = func(c workload.Config) workload_pb.SpiffeWorkloadAPIServer {
return workload.New(c)
}
}
if c.newSDSv2Server == nil {
c.newSDSv2Server = func(c sdsv2.Config) discovery_v2.SecretDiscoveryServiceServer {
return sdsv2.New(c)
}
}
if c.newSDSv3Server == nil {
c.newSDSv3Server = func(c sdsv3.Config) secret_v3.SecretDiscoveryServiceServer {
return sdsv3.New(c)
}
}
if c.newHealthServer == nil {
c.newHealthServer = func(c healthv1.Config) grpc_health_v1.HealthServer {
return healthv1.New(c)
}
}
allowedClaims := make(map[string]struct{}, len(c.AllowedForeignJWTClaims))
for _, claim := range c.AllowedForeignJWTClaims {
allowedClaims[claim] = struct{}{}
}
workloadAPIServer := c.newWorkloadAPIServer(workload.Config{
Manager: c.Manager,
Attestor: attestor,
AllowUnauthenticatedVerifiers: c.AllowUnauthenticatedVerifiers,
AllowedForeignJWTClaims: allowedClaims,
TrustDomain: c.TrustDomain,
})
sdsv2Server := c.newSDSv2Server(sdsv2.Config{
Attestor: attestor,
Manager: c.Manager,
DefaultSVIDName: c.DefaultSVIDName,
DefaultBundleName: c.DefaultBundleName,
})
sdsv3Server := c.newSDSv3Server(sdsv3.Config{
Attestor: attestor,
Manager: c.Manager,
DefaultSVIDName: c.DefaultSVIDName,
DefaultBundleName: c.DefaultBundleName,
DefaultAllBundlesName: c.DefaultAllBundlesName,
DisableSPIFFECertValidation: c.DisableSPIFFECertValidation,
})
healthServer := c.newHealthServer(healthv1.Config{
Addr: c.BindAddr,
})
return &Endpoints{
addr: c.BindAddr,
TCPAddr: c.AgentAddr,
log: c.Log,
metrics: c.Metrics,
workloadAPIServer: workloadAPIServer,
sdsv2Server: sdsv2Server,
sdsv3Server: sdsv3Server,
healthServer: healthServer,
}
}
func (e *Endpoints) ListenAndServe(ctx context.Context) error {
unaryInterceptor, streamInterceptor := middleware.Interceptors(
Middleware(e.log, e.metrics),
)
server := grpc.NewServer(
grpc.Creds(peertracker.NewCredentials()),
grpc.UnaryInterceptor(unaryInterceptor),
grpc.StreamInterceptor(streamInterceptor),
)
workload_pb.RegisterSpiffeWorkloadAPIServer(server, e.workloadAPIServer)
discovery_v2.RegisterSecretDiscoveryServiceServer(server, e.sdsv2Server)
secret_v3.RegisterSecretDiscoveryServiceServer(server, e.sdsv3Server)
grpc_health_v1.RegisterHealthServer(server, e.healthServer)
l, err := e.createListener()
if err != nil {
return err
}
defer l.Close()
// Update the listening address with the actual address.
// If a TCP address was specified with port 0, this will
// update the address with the actual port that is used
// to listen.
e.addr = l.Addr()
e.log.WithFields(logrus.Fields{
telemetry.Network: e.addr.Network(),
telemetry.Address: e.addr,
}).Info("Starting Workload and SDS APIs")
e.triggerListeningHook()
errChan := make(chan error)
go func() {
errChan <- server.Serve(l)
}()
select {
case err = <-errChan:
case <-ctx.Done():
e.log.Info("Stopping Workload and SDS APIs")
server.Stop()
err = <-errChan
if errors.Is(err, grpc.ErrServerStopped) {
err = nil
}
}
return err
}
func (e *Endpoints) triggerListeningHook() {
if e.hooks.listening != nil {
e.hooks.listening <- struct{}{}
}
}
func (e *Endpoints) createTCPAgent(ctx context.Context) *grpc.Server {
unaryInterceptor, streamInterceptor := middleware.Interceptors(
Middleware(e.log, e.metrics),
)
return grpc.NewServer(
grpc.Creds(peertracker.NewCredentials()),
grpc.UnaryInterceptor(unaryInterceptor),
grpc.StreamInterceptor(streamInterceptor),
)
}
// runTCPServer will start the agent and block until it exits or we are dying.
func (e *Endpoints) RunTCPAgent(ctx context.Context) error {
tcpServer := e.createTCPAgent(ctx)
grpc_health_v1.RegisterHealthServer(tcpServer, e.healthServer)
workload_pb.RegisterSpiffeWorkloadAPIServer(tcpServer, e.workloadAPIServer)
discovery_v2.RegisterSecretDiscoveryServiceServer(tcpServer, e.sdsv2Server)
secret_v3.RegisterSecretDiscoveryServiceServer(tcpServer, e.sdsv3Server)
l, err := e.createTCPListener()
if err != nil {
return err
}
defer l.Close()
e.log.WithFields(logrus.Fields{
telemetry.Network: e.TCPAddr.Network(),
telemetry.Address: e.TCPAddr,
}).Info("Starting Workload and SDS APIs")
e.triggerListeningHook()
errChan := make(chan error)
go func() {
errChan <- tcpServer.Serve(l)
}()
select {
case err = <-errChan:
case <-ctx.Done():
e.log.Info("Stopping Workload and SDS APIs")
tcpServer.Stop()
err = <-errChan
if errors.Is(err, grpc.ErrServerStopped) {
err = nil
}
}
return err
}