traefik/integration/grpc_test.go

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package integration
import (
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"context"
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"crypto/rand"
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"crypto/tls"
"crypto/x509"
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"errors"
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"io/ioutil"
"net"
"os"
"time"
"github.com/containous/traefik/integration/helloworld"
"github.com/containous/traefik/integration/try"
"github.com/go-check/check"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials"
)
var LocalhostCert []byte
var LocalhostKey []byte
// GRPCSuite
type GRPCSuite struct{ BaseSuite }
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type myserver struct {
stopStreamExample chan bool
}
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func (s *GRPCSuite) SetUpSuite(c *check.C) {
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var err error
LocalhostCert, err = ioutil.ReadFile("./resources/tls/local.cert")
c.Assert(err, check.IsNil)
LocalhostKey, err = ioutil.ReadFile("./resources/tls/local.key")
c.Assert(err, check.IsNil)
}
func (s *myserver) SayHello(ctx context.Context, in *helloworld.HelloRequest) (*helloworld.HelloReply, error) {
return &helloworld.HelloReply{Message: "Hello " + in.Name}, nil
}
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func (s *myserver) StreamExample(in *helloworld.StreamExampleRequest, server helloworld.Greeter_StreamExampleServer) error {
data := make([]byte, 512)
rand.Read(data)
server.Send(&helloworld.StreamExampleReply{Data: string(data)})
<-s.stopStreamExample
return nil
}
func startGRPCServer(lis net.Listener, server *myserver) error {
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cert, err := tls.X509KeyPair(LocalhostCert, LocalhostKey)
if err != nil {
return err
}
creds := credentials.NewServerTLSFromCert(&cert)
serverOption := grpc.Creds(creds)
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s := grpc.NewServer(serverOption)
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defer s.Stop()
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helloworld.RegisterGreeterServer(s, server)
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return s.Serve(lis)
}
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func getHelloClientGRPC() (helloworld.GreeterClient, func() error, error) {
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roots := x509.NewCertPool()
roots.AppendCertsFromPEM(LocalhostCert)
credsClient := credentials.NewClientTLSFromCert(roots, "")
conn, err := grpc.Dial("127.0.0.1:4443", grpc.WithTransportCredentials(credsClient))
if err != nil {
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return nil, func() error { return nil }, err
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}
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return helloworld.NewGreeterClient(conn), conn.Close, nil
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}
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func callHelloClientGRPC(name string) (string, error) {
client, closer, err := getHelloClientGRPC()
defer closer()
if err != nil {
return "", err
}
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r, err := client.SayHello(context.Background(), &helloworld.HelloRequest{Name: name})
if err != nil {
return "", err
}
return r.Message, nil
}
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func callStreamExampleClientGRPC() (helloworld.Greeter_StreamExampleClient, func() error, error) {
client, closer, err := getHelloClientGRPC()
if err != nil {
return nil, closer, err
}
t, err := client.StreamExample(context.Background(), &helloworld.StreamExampleRequest{})
if err != nil {
return nil, closer, err
}
return t, closer, nil
}
func (s *GRPCSuite) TestGRPC(c *check.C) {
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lis, err := net.Listen("tcp", ":0")
_, port, err := net.SplitHostPort(lis.Addr().String())
c.Assert(err, check.IsNil)
go func() {
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err := startGRPCServer(lis, &myserver{})
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c.Log(err)
c.Assert(err, check.IsNil)
}()
file := s.adaptFile(c, "fixtures/grpc/config.toml", struct {
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CertContent string
KeyContent string
GRPCServerPort string
}{
CertContent: string(LocalhostCert),
KeyContent: string(LocalhostKey),
GRPCServerPort: port,
})
defer os.Remove(file)
cmd, display := s.traefikCmd(withConfigFile(file))
defer display(c)
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err = cmd.Start()
c.Assert(err, check.IsNil)
defer cmd.Process.Kill()
// wait for Traefik
err = try.GetRequest("http://127.0.0.1:8080/api/providers", 1*time.Second, try.BodyContains("Host:127.0.0.1"))
c.Assert(err, check.IsNil)
var response string
err = try.Do(1*time.Second, func() error {
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response, err = callHelloClientGRPC("World")
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return err
})
c.Assert(err, check.IsNil)
c.Assert(response, check.Equals, "Hello World")
}
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func (s *GRPCSuite) TestGRPCInsecure(c *check.C) {
lis, err := net.Listen("tcp", ":0")
_, port, err := net.SplitHostPort(lis.Addr().String())
c.Assert(err, check.IsNil)
go func() {
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err := startGRPCServer(lis, &myserver{})
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c.Log(err)
c.Assert(err, check.IsNil)
}()
file := s.adaptFile(c, "fixtures/grpc/config_insecure.toml", struct {
CertContent string
KeyContent string
GRPCServerPort string
}{
CertContent: string(LocalhostCert),
KeyContent: string(LocalhostKey),
GRPCServerPort: port,
})
defer os.Remove(file)
cmd, display := s.traefikCmd(withConfigFile(file))
defer display(c)
err = cmd.Start()
c.Assert(err, check.IsNil)
defer cmd.Process.Kill()
// wait for Traefik
err = try.GetRequest("http://127.0.0.1:8080/api/providers", 1*time.Second, try.BodyContains("Host:127.0.0.1"))
c.Assert(err, check.IsNil)
var response string
err = try.Do(1*time.Second, func() error {
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response, err = callHelloClientGRPC("World")
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return err
})
c.Assert(err, check.IsNil)
c.Assert(response, check.Equals, "Hello World")
}
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func (s *GRPCSuite) TestGRPCBuffer(c *check.C) {
stopStreamExample := make(chan bool)
defer func() { stopStreamExample <- true }()
lis, err := net.Listen("tcp", ":0")
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c.Assert(err, check.IsNil)
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_, port, err := net.SplitHostPort(lis.Addr().String())
c.Assert(err, check.IsNil)
go func() {
err := startGRPCServer(lis, &myserver{
stopStreamExample: stopStreamExample,
})
c.Log(err)
c.Assert(err, check.IsNil)
}()
file := s.adaptFile(c, "fixtures/grpc/config.toml", struct {
CertContent string
KeyContent string
GRPCServerPort string
}{
CertContent: string(LocalhostCert),
KeyContent: string(LocalhostKey),
GRPCServerPort: port,
})
defer os.Remove(file)
cmd, display := s.traefikCmd(withConfigFile(file))
defer display(c)
err = cmd.Start()
c.Assert(err, check.IsNil)
defer cmd.Process.Kill()
// wait for Traefik
err = try.GetRequest("http://127.0.0.1:8080/api/providers", 1*time.Second, try.BodyContains("Host:127.0.0.1"))
c.Assert(err, check.IsNil)
var client helloworld.Greeter_StreamExampleClient
client, closer, err := callStreamExampleClientGRPC()
defer closer()
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c.Assert(err, check.IsNil)
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received := make(chan bool)
go func() {
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tr, err := client.Recv()
c.Assert(err, check.IsNil)
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c.Assert(len(tr.Data), check.Equals, 512)
received <- true
}()
err = try.Do(time.Second*10, func() error {
select {
case <-received:
return nil
default:
return errors.New("failed to receive stream data")
}
})
c.Assert(err, check.IsNil)
}