consul/agent/grpc-external/stats_test.go

113 lines
3.5 KiB
Go

// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: MPL-2.0
package external
import (
"context"
"net"
"sort"
"testing"
"github.com/armon/go-metrics"
"github.com/google/go-cmp/cmp"
"github.com/stretchr/testify/require"
"golang.org/x/sync/errgroup"
"google.golang.org/grpc"
"google.golang.org/grpc/keepalive"
"github.com/hashicorp/go-hclog"
"github.com/hashicorp/consul/agent/consul/rate"
grpcmiddleware "github.com/hashicorp/consul/agent/grpc-middleware"
"github.com/hashicorp/consul/agent/grpc-middleware/testutil"
"github.com/hashicorp/consul/agent/grpc-middleware/testutil/testservice"
"github.com/hashicorp/consul/proto/private/prototest"
)
func TestServer_EmitsStats(t *testing.T) {
sink, metricsObj := testutil.NewFakeSink(t)
srv := NewServer(hclog.Default(), metricsObj, nil, rate.NullRequestLimitsHandler(), keepalive.ServerParameters{})
testservice.RegisterSimpleServer(srv, &testservice.Simple{})
lis, err := net.Listen("tcp", "127.0.0.1:0")
require.NoError(t, err)
lis = grpcmiddleware.LabelledListener{Listener: lis, Protocol: grpcmiddleware.ProtocolPlaintext}
ctx, cancel := context.WithCancel(context.Background())
t.Cleanup(cancel)
g, ctx := errgroup.WithContext(ctx)
g.Go(func() error {
return srv.Serve(lis)
})
t.Cleanup(func() {
srv.Stop()
if err := g.Wait(); err != nil {
t.Logf("grpc server error: %v", err)
}
})
//nolint:staticcheck
conn, err := grpc.DialContext(ctx, lis.Addr().String(), grpc.WithInsecure())
require.NoError(t, err)
t.Cleanup(func() { 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)
cancel()
conn.Close()
srv.GracefulStop()
// Wait for the server to stop so that active_streams is predictable.
require.NoError(t, g.Wait())
// Occasionally the active_stream=0 metric may be emitted before the
// active_conns=0 metric. The order of those metrics is not really important
// so we sort the calls to match the expected.
sort.Slice(sink.GaugeCalls, func(i, j int) bool {
if i < 2 || j < 2 {
return i < j
}
if len(sink.GaugeCalls[i].Key) < 4 || len(sink.GaugeCalls[j].Key) < 4 {
return i < j
}
return sink.GaugeCalls[i].Key[3] < sink.GaugeCalls[j].Key[3]
})
cmpMetricCalls := cmp.AllowUnexported(testutil.MetricCall{})
expLabels := []metrics.Label{{
Name: "server_type",
Value: "external",
}}
expectedGauge := []testutil.MetricCall{
{Key: []string{"testing", "grpc", "server", "connections"}, Val: 1, Labels: expLabels},
{Key: []string{"testing", "grpc", "server", "streams"}, Val: 1, Labels: expLabels},
{Key: []string{"testing", "grpc", "server", "connections"}, Val: 0, Labels: expLabels},
{Key: []string{"testing", "grpc", "server", "streams"}, Val: 0, Labels: expLabels},
}
prototest.AssertDeepEqual(t, expectedGauge, sink.GaugeCalls, cmpMetricCalls)
expectedCounter := []testutil.MetricCall{
{Key: []string{"testing", "grpc", "server", "connection", "count"}, Val: 1, Labels: expLabels},
{Key: []string{"testing", "grpc", "server", "request", "count"}, Val: 1, Labels: expLabels},
{Key: []string{"testing", "grpc", "server", "stream", "count"}, Val: 1, Labels: expLabels},
}
prototest.AssertDeepEqual(t, expectedCounter, sink.IncrCounterCalls, cmpMetricCalls)
}
func logError(t *testing.T, f func() error) func() {
return func() {
if err := f(); err != nil {
t.Logf(err.Error())
}
}
}