/
xds_lrs_test.go
146 lines (132 loc) · 3.72 KB
/
xds_lrs_test.go
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/*
*
* Copyright 2019 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package balancer
import (
"io"
"sync"
"testing"
"time"
endpointpb "github.com/envoyproxy/go-control-plane/envoy/api/v2/endpoint"
lrsgrpc "github.com/envoyproxy/go-control-plane/envoy/service/load_stats/v2"
lrspb "github.com/envoyproxy/go-control-plane/envoy/service/load_stats/v2"
"github.com/golang/protobuf/proto"
durationpb "github.com/golang/protobuf/ptypes/duration"
"github.com/google/go-cmp/cmp"
"google.golang.org/grpc/balancer"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/resolver"
"google.golang.org/grpc/status"
)
type lrsServer struct {
mu sync.Mutex
dropTotal uint64
drops map[string]uint64
reportingInterval *durationpb.Duration
}
func (lrss *lrsServer) StreamLoadStats(stream lrsgrpc.LoadReportingService_StreamLoadStatsServer) error {
req, err := stream.Recv()
if err != nil {
return err
}
if !proto.Equal(req, &lrspb.LoadStatsRequest{
ClusterStats: []*endpointpb.ClusterStats{{
ClusterName: testServiceName,
}},
}) {
return status.Errorf(codes.FailedPrecondition, "unexpected req: %+v", req)
}
if err := stream.Send(&lrspb.LoadStatsResponse{
Clusters: []string{testServiceName},
LoadReportingInterval: lrss.reportingInterval,
}); err != nil {
return err
}
for {
req, err := stream.Recv()
if err != nil {
if err == io.EOF {
return nil
}
return err
}
stats := req.ClusterStats[0]
lrss.mu.Lock()
lrss.dropTotal += stats.TotalDroppedRequests
for _, d := range stats.DroppedRequests {
lrss.drops[d.Category] += d.DroppedCount
}
lrss.mu.Unlock()
}
}
func (s) TestXdsLoadReporting(t *testing.T) {
originalNewEDSBalancer := newEDSBalancer
newEDSBalancer = newFakeEDSBalancer
defer func() {
newEDSBalancer = originalNewEDSBalancer
}()
builder := balancer.Get(xdsName)
cc := newTestClientConn()
lb, ok := builder.Build(cc, balancer.BuildOptions{Target: resolver.Target{Endpoint: testServiceName}}).(*xdsBalancer)
if !ok {
t.Fatalf("unable to type assert to *xdsBalancer")
}
defer lb.Close()
addr, td, lrss, cleanup := setupServer(t)
defer cleanup()
const intervalNano = 1000 * 1000 * 50
lrss.reportingInterval = &durationpb.Duration{
Seconds: 0,
Nanos: intervalNano,
}
cfg := &XDSConfig{
BalancerName: addr,
}
lb.UpdateClientConnState(balancer.ClientConnState{BalancerConfig: cfg})
td.sendResp(&response{resp: testEDSResp})
var (
i int
edsLB *fakeEDSBalancer
)
for i = 0; i < 10; i++ {
edsLB = getLatestEdsBalancer()
if edsLB != nil {
break
}
time.Sleep(100 * time.Millisecond)
}
if i == 10 {
t.Fatal("edsBalancer instance has not been created and assigned to lb.xdsLB after 1s")
}
var dropCategories = []string{"drop_for_real", "drop_for_fun"}
drops := map[string]uint64{
dropCategories[0]: 31,
dropCategories[1]: 41,
}
for c, d := range drops {
for i := 0; i < int(d); i++ {
edsLB.loadStore.CallDropped(c)
time.Sleep(time.Nanosecond * intervalNano / 10)
}
}
time.Sleep(time.Nanosecond * intervalNano * 2)
lrss.mu.Lock()
defer lrss.mu.Unlock()
if !cmp.Equal(lrss.drops, drops) {
t.Errorf("different: %v %v %v", lrss.drops, drops, cmp.Diff(lrss.drops, drops))
}
}