Merge pull request #9977 from hashicorp/grpc-tuning

streaming: Grpc tuning
This commit is contained in:
Paul Banks 2021-04-08 11:05:38 +01:00 committed by GitHub
commit 9115884c50
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3 changed files with 30 additions and 4 deletions

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@ -113,6 +113,10 @@ func newMaterializer(
Logger: deps.Logger,
Waiter: &retry.Waiter{
MinFailures: 1,
// Start backing off with small increments (200-400ms) which will double
// each attempt. (200-400, 400-800, 800-1600, 1600-3200, 3200-6000, 6000
// after that). (retry.Wait applies Max limit after jitter right now).
Factor: 200 * time.Millisecond,
MinWait: 0,
MaxWait: 60 * time.Second,
Jitter: retry.NewJitter(100),

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@ -5,8 +5,10 @@ import (
"fmt"
"net"
"sync"
"time"
"google.golang.org/grpc"
"google.golang.org/grpc/keepalive"
"github.com/hashicorp/consul/agent/metadata"
"github.com/hashicorp/consul/agent/pool"
@ -64,7 +66,22 @@ func (c *ClientConnPool) ClientConn(datacenter string) (*grpc.ClientConn, error)
grpc.WithDisableRetry(),
grpc.WithStatsHandler(newStatsHandler(defaultMetrics())),
// nolint:staticcheck // there is no other supported alternative to WithBalancerName
grpc.WithBalancerName("pick_first"))
grpc.WithBalancerName("pick_first"),
// Keep alive parameters are based on the same default ones we used for
// Yamux. These are somewhat arbitrary but we did observe in scale testing
// that the gRPC defaults (servers send keepalives only every 2 hours,
// clients never) seemed to result in TCP drops going undetected until
// actual updates needed to be sent which caused unnecessary delays for
// deliveries. These settings should be no more work for servers than
// existing yamux clients but hopefully allow TCP drops to be detected
// earlier and so have a smaller chance of going unnoticed until there are
// actual updates to send out from the servers. The servers have a policy to
// not accept pings any faster than once every 15 seconds to protect against
// abuse.
grpc.WithKeepaliveParams(keepalive.ClientParameters{
Time: 30 * time.Second,
Timeout: 10 * time.Second,
}))
if err != nil {
return nil, err
}

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@ -6,8 +6,10 @@ package grpc
import (
"fmt"
"net"
"time"
"google.golang.org/grpc"
"google.golang.org/grpc/keepalive"
)
// NewHandler returns a gRPC server that accepts connections from Handle(conn).
@ -20,6 +22,9 @@ func NewHandler(addr net.Addr, register func(server *grpc.Server)) *Handler {
srv := grpc.NewServer(
grpc.StatsHandler(newStatsHandler(metrics)),
grpc.StreamInterceptor((&activeStreamCounter{metrics: metrics}).Intercept),
grpc.KeepaliveEnforcementPolicy(keepalive.EnforcementPolicy{
MinTime: 15 * time.Second,
}),
)
register(srv)