// NewClientV3 creates a new grpc client connection to the member
func NewClientV3(m *member) (*clientv3.Client, error) {
if m.grpcAddr == "" {
return nil, fmt.Errorf("member not configured for grpc")
}
f := func(a string, t time.Duration) (net.Conn, error) {
return net.Dial("unix", a)
}
unixdialer := grpc.WithDialer(f)
opts := []grpc.DialOption{
unixdialer,
grpc.WithBlock(),
grpc.WithTimeout(5 * time.Second)}
if m.ClientTLSInfo != nil {
tlscfg, err := m.ClientTLSInfo.ClientConfig()
if err != nil {
return nil, err
}
creds := credentials.NewTLS(tlscfg)
opts = append(opts, grpc.WithTransportCredentials(creds))
} else {
opts = append(opts, grpc.WithInsecure())
}
conn, err := grpc.Dial(m.grpcAddr, opts...)
if err != nil {
return nil, err
}
return clientv3.NewFromConn(conn), nil
}
// Dial establishes a connection for a given endpoint using the client's config
func (c *Client) Dial(endpoint string) (*grpc.ClientConn, error) {
opts := []grpc.DialOption{
grpc.WithBlock(),
grpc.WithTimeout(c.cfg.DialTimeout),
}
if c.creds != nil {
opts = append(opts, grpc.WithTransportCredentials(*c.creds))
} else {
opts = append(opts, grpc.WithInsecure())
}
if url, uerr := url.Parse(endpoint); uerr == nil && url.Scheme == "unix" {
f := func(a string, t time.Duration) (net.Conn, error) {
return net.DialTimeout("unix", a, t)
}
// strip unix:// prefix so certs work
endpoint = url.Host
opts = append(opts, grpc.WithDialer(f))
}
conn, err := grpc.Dial(endpoint, opts...)
if err != nil {
return nil, err
}
return conn, nil
}
// Dial establishes a connection for a given endpoint using the client's config
func (c *Client) Dial(endpoint string) (*grpc.ClientConn, error) {
opts := []grpc.DialOption{
grpc.WithBlock(),
grpc.WithTimeout(c.cfg.DialTimeout),
}
if c.creds != nil {
opts = append(opts, grpc.WithTransportCredentials(*c.creds))
} else {
opts = append(opts, grpc.WithInsecure())
}
proto := "tcp"
if url, uerr := url.Parse(endpoint); uerr == nil && url.Scheme == "unix" {
proto = "unix"
// strip unix:// prefix so certs work
endpoint = url.Host
}
f := func(a string, t time.Duration) (net.Conn, error) {
select {
case <-c.ctx.Done():
return nil, c.ctx.Err()
default:
}
return net.DialTimeout(proto, a, t)
}
opts = append(opts, grpc.WithDialer(f))
conn, err := grpc.Dial(endpoint, opts...)
if err != nil {
return nil, err
}
return conn, nil
}
// Dial establishes a connection for a given endpoint using the client's config
func (c *Client) Dial(endpoint string) (*grpc.ClientConn, error) {
// TODO: enable grpc.WithTransportCredentials(creds)
conn, err := grpc.Dial(
endpoint,
grpc.WithBlock(),
grpc.WithTimeout(c.cfg.DialTimeout),
grpc.WithInsecure())
if err != nil {
return nil, err
}
return conn, nil
}
// Dial establishes a connection for a given endpoint using the client's config
func (c *Client) Dial(endpoint string) (*grpc.ClientConn, error) {
opts := []grpc.DialOption{
grpc.WithBlock(),
grpc.WithTimeout(c.cfg.DialTimeout),
}
if c.creds != nil {
opts = append(opts, grpc.WithTransportCredentials(*c.creds))
} else {
opts = append(opts, grpc.WithInsecure())
}
conn, err := grpc.Dial(endpoint, opts...)
if err != nil {
return nil, err
}
return conn, nil
}
func TestReconnectTimeout(t *testing.T) {
lis, err := net.Listen("tcp", ":0")
if err != nil {
t.Fatalf("Failed to listen: %v", err)
}
_, port, err := net.SplitHostPort(lis.Addr().String())
if err != nil {
t.Fatalf("Failed to parse listener address: %v", err)
}
addr := "localhost:" + port
conn, err := grpc.Dial(addr, grpc.WithTimeout(5*time.Second), grpc.WithBlock(), grpc.WithInsecure())
if err != nil {
t.Fatalf("Failed to dial to the server %q: %v", addr, err)
}
// Close unaccepted connection (i.e., conn).
lis.Close()
tc := testpb.NewTestServiceClient(conn)
waitC := make(chan struct{})
go func() {
defer close(waitC)
argSize := 271828
respSize := 314159
payload, err := newPayload(testpb.PayloadType_COMPRESSABLE, int32(argSize))
if err != nil {
t.Fatal(err)
}
req := &testpb.SimpleRequest{
ResponseType: testpb.PayloadType_COMPRESSABLE.Enum(),
ResponseSize: proto.Int32(int32(respSize)),
Payload: payload,
}
if _, err := tc.UnaryCall(context.Background(), req); err == nil {
t.Fatalf("TestService/UnaryCall(_, _) = _, <nil>, want _, non-nil")
}
}()
// Block untill reconnect times out.
<-waitC
if err := conn.Close(); err != grpc.ErrClientConnClosing {
t.Fatalf("%v.Close() = %v, want %v", conn, err, grpc.ErrClientConnClosing)
}
}
