grpc: Add a simple test service for testing the gRPC server

This commit is contained in:
Daniel Nephin 2020-08-28 19:23:40 -04:00
parent 2257247095
commit fd42804063
6 changed files with 863 additions and 8 deletions

View File

@ -10,10 +10,8 @@ import (
"google.golang.org/grpc"
)
// NewHandler returns a Handler for addr.
// NewHandler returns a gRPC server that accepts connections from Handle(conn).
func NewHandler(addr net.Addr) *Handler {
conns := make(chan net.Conn)
// We don't need to pass tls.Config to the server since it's multiplexed
// behind the RPC listener, which already has TLS configured.
srv := grpc.NewServer(
@ -24,23 +22,21 @@ func NewHandler(addr net.Addr) *Handler {
// TODO(streaming): add gRPC services to srv here
return &Handler{
conns: conns,
srv: srv,
listener: &chanListener{addr: addr, conns: conns},
listener: &chanListener{addr: addr, conns: make(chan net.Conn)},
}
}
// Handler implements a handler for the rpc server listener, and the
// agent.Component interface for managing the lifecycle of the grpc.Server.
type Handler struct {
conns chan net.Conn
srv *grpc.Server
listener *chanListener
}
// Handle the connection by sending it to a channel for the grpc.Server to receive.
func (h *Handler) Handle(conn net.Conn) {
h.conns <- conn
h.listener.conns <- conn
}
func (h *Handler) Run() error {

View File

@ -0,0 +1,28 @@
// Code generated by protoc-gen-go-binary. DO NOT EDIT.
// source: agent/grpc/internal/testservice/simple.proto
package testservice
import (
"github.com/golang/protobuf/proto"
)
// MarshalBinary implements encoding.BinaryMarshaler
func (msg *Req) MarshalBinary() ([]byte, error) {
return proto.Marshal(msg)
}
// UnmarshalBinary implements encoding.BinaryUnmarshaler
func (msg *Req) UnmarshalBinary(b []byte) error {
return proto.Unmarshal(b, msg)
}
// MarshalBinary implements encoding.BinaryMarshaler
func (msg *Resp) MarshalBinary() ([]byte, error) {
return proto.Marshal(msg)
}
// UnmarshalBinary implements encoding.BinaryUnmarshaler
func (msg *Resp) UnmarshalBinary(b []byte) error {
return proto.Unmarshal(b, msg)
}

View File

@ -0,0 +1,691 @@
// Code generated by protoc-gen-gogo. DO NOT EDIT.
// source: agent/grpc/internal/testservice/simple.proto
package testservice
import (
context "context"
fmt "fmt"
proto "github.com/golang/protobuf/proto"
grpc "google.golang.org/grpc"
codes "google.golang.org/grpc/codes"
status "google.golang.org/grpc/status"
io "io"
math "math"
math_bits "math/bits"
)
// Reference imports to suppress errors if they are not otherwise used.
var _ = proto.Marshal
var _ = fmt.Errorf
var _ = math.Inf
// This is a compile-time assertion to ensure that this generated file
// is compatible with the proto package it is being compiled against.
// A compilation error at this line likely means your copy of the
// proto package needs to be updated.
const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
type Req struct {
Datacenter string `protobuf:"bytes,1,opt,name=Datacenter,proto3" json:"Datacenter,omitempty"`
XXX_NoUnkeyedLiteral struct{} `json:"-"`
XXX_unrecognized []byte `json:"-"`
XXX_sizecache int32 `json:"-"`
}
func (m *Req) Reset() { *m = Req{} }
func (m *Req) String() string { return proto.CompactTextString(m) }
func (*Req) ProtoMessage() {}
func (*Req) Descriptor() ([]byte, []int) {
return fileDescriptor_3009a77c573f826d, []int{0}
}
func (m *Req) XXX_Unmarshal(b []byte) error {
return m.Unmarshal(b)
}
func (m *Req) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
if deterministic {
return xxx_messageInfo_Req.Marshal(b, m, deterministic)
} else {
b = b[:cap(b)]
n, err := m.MarshalToSizedBuffer(b)
if err != nil {
return nil, err
}
return b[:n], nil
}
}
func (m *Req) XXX_Merge(src proto.Message) {
xxx_messageInfo_Req.Merge(m, src)
}
func (m *Req) XXX_Size() int {
return m.Size()
}
func (m *Req) XXX_DiscardUnknown() {
xxx_messageInfo_Req.DiscardUnknown(m)
}
var xxx_messageInfo_Req proto.InternalMessageInfo
func (m *Req) GetDatacenter() string {
if m != nil {
return m.Datacenter
}
return ""
}
type Resp struct {
ServerName string `protobuf:"bytes,1,opt,name=ServerName,proto3" json:"ServerName,omitempty"`
XXX_NoUnkeyedLiteral struct{} `json:"-"`
XXX_unrecognized []byte `json:"-"`
XXX_sizecache int32 `json:"-"`
}
func (m *Resp) Reset() { *m = Resp{} }
func (m *Resp) String() string { return proto.CompactTextString(m) }
func (*Resp) ProtoMessage() {}
func (*Resp) Descriptor() ([]byte, []int) {
return fileDescriptor_3009a77c573f826d, []int{1}
}
func (m *Resp) XXX_Unmarshal(b []byte) error {
return m.Unmarshal(b)
}
func (m *Resp) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
if deterministic {
return xxx_messageInfo_Resp.Marshal(b, m, deterministic)
} else {
b = b[:cap(b)]
n, err := m.MarshalToSizedBuffer(b)
if err != nil {
return nil, err
}
return b[:n], nil
}
}
func (m *Resp) XXX_Merge(src proto.Message) {
xxx_messageInfo_Resp.Merge(m, src)
}
func (m *Resp) XXX_Size() int {
return m.Size()
}
func (m *Resp) XXX_DiscardUnknown() {
xxx_messageInfo_Resp.DiscardUnknown(m)
}
var xxx_messageInfo_Resp proto.InternalMessageInfo
func (m *Resp) GetServerName() string {
if m != nil {
return m.ServerName
}
return ""
}
func init() {
proto.RegisterType((*Req)(nil), "testservice.Req")
proto.RegisterType((*Resp)(nil), "testservice.Resp")
}
func init() {
proto.RegisterFile("agent/grpc/internal/testservice/simple.proto", fileDescriptor_3009a77c573f826d)
}
var fileDescriptor_3009a77c573f826d = []byte{
// 200 bytes of a gzipped FileDescriptorProto
0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0xd2, 0x49, 0x4c, 0x4f, 0xcd,
0x2b, 0xd1, 0x4f, 0x2f, 0x2a, 0x48, 0xd6, 0xcf, 0xcc, 0x2b, 0x49, 0x2d, 0xca, 0x4b, 0xcc, 0xd1,
0x2f, 0x49, 0x2d, 0x2e, 0x29, 0x4e, 0x2d, 0x2a, 0xcb, 0x4c, 0x4e, 0xd5, 0x2f, 0xce, 0xcc, 0x2d,
0xc8, 0x49, 0xd5, 0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0xe2, 0x46, 0x92, 0x51, 0x52, 0xe5, 0x62,
0x0e, 0x4a, 0x2d, 0x14, 0x92, 0xe3, 0xe2, 0x72, 0x49, 0x2c, 0x49, 0x4c, 0x4e, 0x05, 0xe9, 0x96,
0x60, 0x54, 0x60, 0xd4, 0xe0, 0x0c, 0x42, 0x12, 0x51, 0x52, 0xe3, 0x62, 0x09, 0x4a, 0x2d, 0x2e,
0x00, 0xa9, 0x0b, 0x4e, 0x2d, 0x2a, 0x4b, 0x2d, 0xf2, 0x4b, 0xcc, 0x4d, 0x85, 0xa9, 0x43, 0x88,
0x18, 0xe5, 0x72, 0xb1, 0x05, 0x83, 0xed, 0x12, 0x32, 0xe2, 0xe2, 0x0c, 0xce, 0xcf, 0x4d, 0x2d,
0xc9, 0xc8, 0xcc, 0x4b, 0x17, 0x12, 0xd0, 0x43, 0xb2, 0x53, 0x2f, 0x28, 0xb5, 0x50, 0x4a, 0x10,
0x4d, 0xa4, 0xb8, 0x40, 0x89, 0x41, 0x48, 0x9f, 0x8b, 0xc5, 0x2d, 0x27, 0xbf, 0x9c, 0x48, 0xe5,
0x06, 0x8c, 0x4e, 0x02, 0x27, 0x1e, 0xc9, 0x31, 0x5e, 0x78, 0x24, 0xc7, 0xf8, 0xe0, 0x91, 0x1c,
0xe3, 0x8c, 0xc7, 0x72, 0x0c, 0x49, 0x6c, 0x60, 0x3f, 0x1a, 0x03, 0x02, 0x00, 0x00, 0xff, 0xff,
0x61, 0xd3, 0x5e, 0xba, 0x13, 0x01, 0x00, 0x00,
}
// Reference imports to suppress errors if they are not otherwise used.
var _ context.Context
var _ grpc.ClientConn
// This is a compile-time assertion to ensure that this generated file
// is compatible with the grpc package it is being compiled against.
const _ = grpc.SupportPackageIsVersion4
// SimpleClient is the client API for Simple service.
//
// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
type SimpleClient interface {
Something(ctx context.Context, in *Req, opts ...grpc.CallOption) (*Resp, error)
Flow(ctx context.Context, in *Req, opts ...grpc.CallOption) (Simple_FlowClient, error)
}
type simpleClient struct {
cc *grpc.ClientConn
}
func NewSimpleClient(cc *grpc.ClientConn) SimpleClient {
return &simpleClient{cc}
}
func (c *simpleClient) Something(ctx context.Context, in *Req, opts ...grpc.CallOption) (*Resp, error) {
out := new(Resp)
err := c.cc.Invoke(ctx, "/testservice.Simple/Something", in, out, opts...)
if err != nil {
return nil, err
}
return out, nil
}
func (c *simpleClient) Flow(ctx context.Context, in *Req, opts ...grpc.CallOption) (Simple_FlowClient, error) {
stream, err := c.cc.NewStream(ctx, &_Simple_serviceDesc.Streams[0], "/testservice.Simple/Flow", opts...)
if err != nil {
return nil, err
}
x := &simpleFlowClient{stream}
if err := x.ClientStream.SendMsg(in); err != nil {
return nil, err
}
if err := x.ClientStream.CloseSend(); err != nil {
return nil, err
}
return x, nil
}
type Simple_FlowClient interface {
Recv() (*Resp, error)
grpc.ClientStream
}
type simpleFlowClient struct {
grpc.ClientStream
}
func (x *simpleFlowClient) Recv() (*Resp, error) {
m := new(Resp)
if err := x.ClientStream.RecvMsg(m); err != nil {
return nil, err
}
return m, nil
}
// SimpleServer is the server API for Simple service.
type SimpleServer interface {
Something(context.Context, *Req) (*Resp, error)
Flow(*Req, Simple_FlowServer) error
}
// UnimplementedSimpleServer can be embedded to have forward compatible implementations.
type UnimplementedSimpleServer struct {
}
func (*UnimplementedSimpleServer) Something(ctx context.Context, req *Req) (*Resp, error) {
return nil, status.Errorf(codes.Unimplemented, "method Something not implemented")
}
func (*UnimplementedSimpleServer) Flow(req *Req, srv Simple_FlowServer) error {
return status.Errorf(codes.Unimplemented, "method Flow not implemented")
}
func RegisterSimpleServer(s *grpc.Server, srv SimpleServer) {
s.RegisterService(&_Simple_serviceDesc, srv)
}
func _Simple_Something_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(Req)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(SimpleServer).Something(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: "/testservice.Simple/Something",
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(SimpleServer).Something(ctx, req.(*Req))
}
return interceptor(ctx, in, info, handler)
}
func _Simple_Flow_Handler(srv interface{}, stream grpc.ServerStream) error {
m := new(Req)
if err := stream.RecvMsg(m); err != nil {
return err
}
return srv.(SimpleServer).Flow(m, &simpleFlowServer{stream})
}
type Simple_FlowServer interface {
Send(*Resp) error
grpc.ServerStream
}
type simpleFlowServer struct {
grpc.ServerStream
}
func (x *simpleFlowServer) Send(m *Resp) error {
return x.ServerStream.SendMsg(m)
}
var _Simple_serviceDesc = grpc.ServiceDesc{
ServiceName: "testservice.Simple",
HandlerType: (*SimpleServer)(nil),
Methods: []grpc.MethodDesc{
{
MethodName: "Something",
Handler: _Simple_Something_Handler,
},
},
Streams: []grpc.StreamDesc{
{
StreamName: "Flow",
Handler: _Simple_Flow_Handler,
ServerStreams: true,
},
},
Metadata: "agent/grpc/internal/testservice/simple.proto",
}
func (m *Req) Marshal() (dAtA []byte, err error) {
size := m.Size()
dAtA = make([]byte, size)
n, err := m.MarshalToSizedBuffer(dAtA[:size])
if err != nil {
return nil, err
}
return dAtA[:n], nil
}
func (m *Req) MarshalTo(dAtA []byte) (int, error) {
size := m.Size()
return m.MarshalToSizedBuffer(dAtA[:size])
}
func (m *Req) MarshalToSizedBuffer(dAtA []byte) (int, error) {
i := len(dAtA)
_ = i
var l int
_ = l
if m.XXX_unrecognized != nil {
i -= len(m.XXX_unrecognized)
copy(dAtA[i:], m.XXX_unrecognized)
}
if len(m.Datacenter) > 0 {
i -= len(m.Datacenter)
copy(dAtA[i:], m.Datacenter)
i = encodeVarintSimple(dAtA, i, uint64(len(m.Datacenter)))
i--
dAtA[i] = 0xa
}
return len(dAtA) - i, nil
}
func (m *Resp) Marshal() (dAtA []byte, err error) {
size := m.Size()
dAtA = make([]byte, size)
n, err := m.MarshalToSizedBuffer(dAtA[:size])
if err != nil {
return nil, err
}
return dAtA[:n], nil
}
func (m *Resp) MarshalTo(dAtA []byte) (int, error) {
size := m.Size()
return m.MarshalToSizedBuffer(dAtA[:size])
}
func (m *Resp) MarshalToSizedBuffer(dAtA []byte) (int, error) {
i := len(dAtA)
_ = i
var l int
_ = l
if m.XXX_unrecognized != nil {
i -= len(m.XXX_unrecognized)
copy(dAtA[i:], m.XXX_unrecognized)
}
if len(m.ServerName) > 0 {
i -= len(m.ServerName)
copy(dAtA[i:], m.ServerName)
i = encodeVarintSimple(dAtA, i, uint64(len(m.ServerName)))
i--
dAtA[i] = 0xa
}
return len(dAtA) - i, nil
}
func encodeVarintSimple(dAtA []byte, offset int, v uint64) int {
offset -= sovSimple(v)
base := offset
for v >= 1<<7 {
dAtA[offset] = uint8(v&0x7f | 0x80)
v >>= 7
offset++
}
dAtA[offset] = uint8(v)
return base
}
func (m *Req) Size() (n int) {
if m == nil {
return 0
}
var l int
_ = l
l = len(m.Datacenter)
if l > 0 {
n += 1 + l + sovSimple(uint64(l))
}
if m.XXX_unrecognized != nil {
n += len(m.XXX_unrecognized)
}
return n
}
func (m *Resp) Size() (n int) {
if m == nil {
return 0
}
var l int
_ = l
l = len(m.ServerName)
if l > 0 {
n += 1 + l + sovSimple(uint64(l))
}
if m.XXX_unrecognized != nil {
n += len(m.XXX_unrecognized)
}
return n
}
func sovSimple(x uint64) (n int) {
return (math_bits.Len64(x|1) + 6) / 7
}
func sozSimple(x uint64) (n int) {
return sovSimple(uint64((x << 1) ^ uint64((int64(x) >> 63))))
}
func (m *Req) Unmarshal(dAtA []byte) error {
l := len(dAtA)
iNdEx := 0
for iNdEx < l {
preIndex := iNdEx
var wire uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowSimple
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
wire |= uint64(b&0x7F) << shift
if b < 0x80 {
break
}
}
fieldNum := int32(wire >> 3)
wireType := int(wire & 0x7)
if wireType == 4 {
return fmt.Errorf("proto: Req: wiretype end group for non-group")
}
if fieldNum <= 0 {
return fmt.Errorf("proto: Req: illegal tag %d (wire type %d)", fieldNum, wire)
}
switch fieldNum {
case 1:
if wireType != 2 {
return fmt.Errorf("proto: wrong wireType = %d for field Datacenter", wireType)
}
var stringLen uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowSimple
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
stringLen |= uint64(b&0x7F) << shift
if b < 0x80 {
break
}
}
intStringLen := int(stringLen)
if intStringLen < 0 {
return ErrInvalidLengthSimple
}
postIndex := iNdEx + intStringLen
if postIndex < 0 {
return ErrInvalidLengthSimple
}
if postIndex > l {
return io.ErrUnexpectedEOF
}
m.Datacenter = string(dAtA[iNdEx:postIndex])
iNdEx = postIndex
default:
iNdEx = preIndex
skippy, err := skipSimple(dAtA[iNdEx:])
if err != nil {
return err
}
if skippy < 0 {
return ErrInvalidLengthSimple
}
if (iNdEx + skippy) < 0 {
return ErrInvalidLengthSimple
}
if (iNdEx + skippy) > l {
return io.ErrUnexpectedEOF
}
m.XXX_unrecognized = append(m.XXX_unrecognized, dAtA[iNdEx:iNdEx+skippy]...)
iNdEx += skippy
}
}
if iNdEx > l {
return io.ErrUnexpectedEOF
}
return nil
}
func (m *Resp) Unmarshal(dAtA []byte) error {
l := len(dAtA)
iNdEx := 0
for iNdEx < l {
preIndex := iNdEx
var wire uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowSimple
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
wire |= uint64(b&0x7F) << shift
if b < 0x80 {
break
}
}
fieldNum := int32(wire >> 3)
wireType := int(wire & 0x7)
if wireType == 4 {
return fmt.Errorf("proto: Resp: wiretype end group for non-group")
}
if fieldNum <= 0 {
return fmt.Errorf("proto: Resp: illegal tag %d (wire type %d)", fieldNum, wire)
}
switch fieldNum {
case 1:
if wireType != 2 {
return fmt.Errorf("proto: wrong wireType = %d for field ServerName", wireType)
}
var stringLen uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowSimple
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
stringLen |= uint64(b&0x7F) << shift
if b < 0x80 {
break
}
}
intStringLen := int(stringLen)
if intStringLen < 0 {
return ErrInvalidLengthSimple
}
postIndex := iNdEx + intStringLen
if postIndex < 0 {
return ErrInvalidLengthSimple
}
if postIndex > l {
return io.ErrUnexpectedEOF
}
m.ServerName = string(dAtA[iNdEx:postIndex])
iNdEx = postIndex
default:
iNdEx = preIndex
skippy, err := skipSimple(dAtA[iNdEx:])
if err != nil {
return err
}
if skippy < 0 {
return ErrInvalidLengthSimple
}
if (iNdEx + skippy) < 0 {
return ErrInvalidLengthSimple
}
if (iNdEx + skippy) > l {
return io.ErrUnexpectedEOF
}
m.XXX_unrecognized = append(m.XXX_unrecognized, dAtA[iNdEx:iNdEx+skippy]...)
iNdEx += skippy
}
}
if iNdEx > l {
return io.ErrUnexpectedEOF
}
return nil
}
func skipSimple(dAtA []byte) (n int, err error) {
l := len(dAtA)
iNdEx := 0
for iNdEx < l {
var wire uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return 0, ErrIntOverflowSimple
}
if iNdEx >= l {
return 0, io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
wire |= (uint64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
wireType := int(wire & 0x7)
switch wireType {
case 0:
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return 0, ErrIntOverflowSimple
}
if iNdEx >= l {
return 0, io.ErrUnexpectedEOF
}
iNdEx++
if dAtA[iNdEx-1] < 0x80 {
break
}
}
return iNdEx, nil
case 1:
iNdEx += 8
return iNdEx, nil
case 2:
var length int
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return 0, ErrIntOverflowSimple
}
if iNdEx >= l {
return 0, io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
length |= (int(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
if length < 0 {
return 0, ErrInvalidLengthSimple
}
iNdEx += length
if iNdEx < 0 {
return 0, ErrInvalidLengthSimple
}
return iNdEx, nil
case 3:
for {
var innerWire uint64
var start int = iNdEx
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return 0, ErrIntOverflowSimple
}
if iNdEx >= l {
return 0, io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
innerWire |= (uint64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
innerWireType := int(innerWire & 0x7)
if innerWireType == 4 {
break
}
next, err := skipSimple(dAtA[start:])
if err != nil {
return 0, err
}
iNdEx = start + next
if iNdEx < 0 {
return 0, ErrInvalidLengthSimple
}
}
return iNdEx, nil
case 4:
return iNdEx, nil
case 5:
iNdEx += 4
return iNdEx, nil
default:
return 0, fmt.Errorf("proto: illegal wireType %d", wireType)
}
}
panic("unreachable")
}
var (
ErrInvalidLengthSimple = fmt.Errorf("proto: negative length found during unmarshaling")
ErrIntOverflowSimple = fmt.Errorf("proto: integer overflow")
)

View File

@ -0,0 +1,17 @@
syntax = "proto3";
package testservice;
// Simple service is used to test gRPC plumbing.
service Simple {
rpc Something(Req) returns (Resp) {}
rpc Flow(Req) returns (stream Resp) {}
}
message Req {
string Datacenter = 1;
}
message Resp {
string ServerName = 1;
}

View File

@ -70,7 +70,6 @@ func (i *activeStreamCounter) Intercept(
_ *grpc.StreamServerInfo,
handler grpc.StreamHandler,
) error {
count := atomic.AddUint64(&i.count, 1)
metrics.SetGauge([]string{"grpc", "server", "active_streams"}, float32(count))
defer func() {

124
agent/grpc/stats_test.go Normal file
View File

@ -0,0 +1,124 @@
package grpc
import (
"context"
"net"
"testing"
"time"
"github.com/armon/go-metrics"
"github.com/hashicorp/consul/agent/grpc/internal/testservice"
"github.com/stretchr/testify/require"
"golang.org/x/sync/errgroup"
"google.golang.org/grpc"
)
func TestHandler_EmitsStats(t *testing.T) {
sink := patchGlobalMetrics(t)
addr := &net.IPAddr{IP: net.ParseIP("127.0.0.1")}
handler := NewHandler(addr)
testservice.RegisterSimpleServer(handler.srv, &simple{})
lis, err := net.Listen("tcp", "127.0.0.1:0")
require.NoError(t, err)
defer lis.Close()
ctx, cancel := context.WithCancel(context.Background())
t.Cleanup(cancel)
g, ctx := errgroup.WithContext(ctx)
g.Go(func() error {
return handler.srv.Serve(lis)
})
t.Cleanup(func() {
if err := handler.Shutdown(); err != nil {
t.Logf("grpc server shutdown: %v", err)
}
if err := g.Wait(); err != nil {
t.Logf("grpc server error: %v", err)
}
})
conn, err := grpc.DialContext(ctx, lis.Addr().String(), grpc.WithInsecure())
require.NoError(t, err)
defer conn.Close()
client := testservice.NewSimpleClient(conn)
fClient, err := client.Flow(ctx, &testservice.Req{Datacenter: "mine"})
require.NoError(t, err)
// Wait for the first event so that we know the stream is sending.
_, err = fClient.Recv()
require.NoError(t, err)
expectedCounter := []metricCall{
{key: []string{"testing", "grpc", "server", "request"}, val: 1},
}
require.Equal(t, expectedCounter, sink.incrCounterCalls)
expectedGauge := []metricCall{
{key: []string{"testing", "grpc", "server", "active_conns"}, val: 1},
{key: []string{"testing", "grpc", "server", "active_streams"}, val: 1},
// TODO: why is the count reset to 0 before the client receives the second message?
{key: []string{"testing", "grpc", "server", "active_streams"}, val: 0},
}
require.Equal(t, expectedGauge, sink.gaugeCalls)
}
type simple struct {
name string
}
func (s *simple) Flow(_ *testservice.Req, flow testservice.Simple_FlowServer) error {
if err := flow.Send(&testservice.Resp{ServerName: "one"}); err != nil {
return err
}
if err := flow.Send(&testservice.Resp{ServerName: "two"}); err != nil {
return err
}
return nil
}
func (s *simple) Something(_ context.Context, _ *testservice.Req) (*testservice.Resp, error) {
return &testservice.Resp{ServerName: "the-fake-service-name"}, nil
}
func patchGlobalMetrics(t *testing.T) *fakeMetricsSink {
t.Helper()
sink := &fakeMetricsSink{}
cfg := &metrics.Config{
ServiceName: "testing",
TimerGranularity: time.Millisecond, // Timers are in milliseconds
ProfileInterval: time.Second, // Poll runtime every second
FilterDefault: true,
}
_, err := metrics.NewGlobal(cfg, sink)
require.NoError(t, err)
t.Cleanup(func() {
_, err = metrics.NewGlobal(cfg, &metrics.BlackholeSink{})
require.NoError(t, err, "failed to reset global metrics")
})
return sink
}
type fakeMetricsSink struct {
metrics.BlackholeSink
gaugeCalls []metricCall
incrCounterCalls []metricCall
}
func (f *fakeMetricsSink) SetGaugeWithLabels(key []string, val float32, labels []metrics.Label) {
f.gaugeCalls = append(f.gaugeCalls, metricCall{key: key, val: val, labels: labels})
}
func (f *fakeMetricsSink) IncrCounterWithLabels(key []string, val float32, labels []metrics.Label) {
f.incrCounterCalls = append(f.incrCounterCalls, metricCall{key: key, val: val, labels: labels})
}
type metricCall struct {
key []string
val float32
labels []metrics.Label
}