*: configure server keepalive #8535

gyuho · 2017-09-09T01:23:32Z

heyitsanthony · 2017-09-12T09:58:31Z

please rebase with the watch keepalive test when #8545 is merged; this can't be merged without tests

Also, the keepalive test can drop the time.Sleep calls:

+++ b/clientv3/integration/watch_keepalive_test.go
@@ -66,14 +66,12 @@ func TestWatchKeepAlive(t *testing.T) {
        // ep[0] keepalive time-out after DialKeepAliveTime + DialKeepAliveTimeout
        // wait extra for processing network error for endpoint switching
        timeout := ccfg.DialKeepAliveTime + ccfg.DialKeepAliveTimeout + ccfg.DialTimeout
-       time.Sleep(timeout)
-
        if _, err = clus.Client(1).Put(context.TODO(), "foo", "bar"); err != nil {
                t.Fatal(err)
        }
        select {
        case <-wch:
-       case <-time.After(5 * time.Second):
+       case <-time.After(timeout):
                t.Fatal("took too long to receive events")
        }
 
@@ -82,14 +80,12 @@ func TestWatchKeepAlive(t *testing.T) {
        defer clus.Members[1].Unblackhole()
 
        // wait for ep[0] recover, ep[1] fail
-       time.Sleep(timeout)
-
        if _, err = clus.Client(0).Put(context.TODO(), "foo", "bar"); err != nil {
                t.Fatal(err)
        }
        select {
        case <-wch:
-       case <-time.After(5 * time.Second):
+       case <-time.After(timeout):
                t.Fatal("took too long to receive events")
        }
 }

xiang90 · 2017-09-22T20:19:28Z

what is the blocked on?

gyuho · 2017-09-23T00:38:20Z

@xiang90 This is blocked on #8581, failing a bunch of CIs since #8545 (see #8592). Will investigate more next week.

xiang90 · 2017-09-28T01:17:19Z

embed/config.go

+		SnapCount:            etcdserver.DefaultSnapCount,
+		MaxTxnOps:            DefaultMaxTxnOps,
+		MaxRequestBytes:      DefaultMaxRequestBytes,
+		GRPCKeepAliveMinTime: 5 * time.Second,


define this as a const?

xiang90 · 2017-09-28T01:18:27Z

etcdmain/config.go

@@ -143,6 +144,9 @@ func newConfig() *config {
 	fs.Int64Var(&cfg.QuotaBackendBytes, "quota-backend-bytes", cfg.QuotaBackendBytes, "Raise alarms when backend size exceeds the given quota. 0 means use the default quota.")
 	fs.UintVar(&cfg.MaxTxnOps, "max-txn-ops", cfg.MaxTxnOps, "Maximum number of operations permitted in a transaction.")
 	fs.UintVar(&cfg.MaxRequestBytes, "max-request-bytes", cfg.MaxRequestBytes, "Maximum client request size in bytes the server will accept.")
+	fs.DurationVar(&cfg.GRPCKeepAliveMinTime, "grpc-keepalive-min-time", cfg.Config.GRPCKeepAliveMinTime, "Minimum interval duration that a client should wait before pinging server.")
+	fs.DurationVar(&cfg.GRPCKeepAliveInterval, "grpc-keepalive-interval", time.Duration(0), "Frequency duration of server-to-client ping to check if a connection is alive.")


explain what does the default value do?

xiang90 · 2017-09-28T01:18:32Z

etcdmain/config.go

@@ -143,6 +144,9 @@ func newConfig() *config {
 	fs.Int64Var(&cfg.QuotaBackendBytes, "quota-backend-bytes", cfg.QuotaBackendBytes, "Raise alarms when backend size exceeds the given quota. 0 means use the default quota.")
 	fs.UintVar(&cfg.MaxTxnOps, "max-txn-ops", cfg.MaxTxnOps, "Maximum number of operations permitted in a transaction.")
 	fs.UintVar(&cfg.MaxRequestBytes, "max-request-bytes", cfg.MaxRequestBytes, "Maximum client request size in bytes the server will accept.")
+	fs.DurationVar(&cfg.GRPCKeepAliveMinTime, "grpc-keepalive-min-time", cfg.Config.GRPCKeepAliveMinTime, "Minimum interval duration that a client should wait before pinging server.")
+	fs.DurationVar(&cfg.GRPCKeepAliveInterval, "grpc-keepalive-interval", time.Duration(0), "Frequency duration of server-to-client ping to check if a connection is alive.")
+	fs.DurationVar(&cfg.GRPCKeepAliveTimeout, "grpc-keepalive-timeout", time.Duration(0), "Additional duration of wait before closing a non-responsive connection.")


i think we should find a good default value to enable keepalive related options.

Defined default interval 5s, timeout 3s.

xiang90 · 2017-09-28T01:24:11Z

clientv3/integration/watch_keepalive_test.go

+	clus.Members[0].Blackhole()
+
+	// expects endpoint switch to ep[1]
+	cli.SetEndpoints(clus.Members[0].GRPCAddr(), clus.Members[1].GRPCAddr())


will setenpoints cause a shuffle directly? or client will still pin to the original one?

It will trigger gRPC to close ep[0], and client will pin ep[1].

xiang90 · 2017-09-28T01:25:29Z

clientv3/integration/watch_keepalive_test.go

+
+	clus := integration.NewClusterV3(t, &integration.ClusterConfig{
+		Size:                  3,
+		GRPCKeepAliveMinTime:  time.Millisecond, // avoid too_many_pings


if we are testing the client-side keepalive here, why do we need to enable server-side keepalive? we probably can also move this test into another pr?

Removed server parameters for this test, leaving server-to-client ping test as TODO.

Signed-off-by: Gyu-Ho Lee <[email protected]>

gyuho · 2017-09-28T18:37:33Z

@xiang90 Used default values in grpc-go for keepalive server interval and timeout. PTAL.

xiang90 · 2017-09-28T19:26:53Z

etcdmain/help.go

@@ -70,6 +70,12 @@ member flags:
 		maximum number of operations permitted in a transaction.
 	--max-request-bytes '1572864'
 		maximum client request size in bytes the server will accept.
+	--grpc-keepalive-min-time '5s'
+		minimum duration interval that a client should wait before pinging server.
+	--grpc-keepalive-interval '2h'


2h seems too high. probably 5 minutes or something? is there a recommended vault from gRPC-go?

gRPC Go defaults to 2h. Should etcd use 5min?

2h is fine if it is gRPC's default.

xiang90 · 2017-09-28T19:58:26Z

lgtm

gyuho added the kind/release-note label Sep 9, 2017

gyuho added the WIP label Sep 12, 2017

gyuho force-pushed the keepalive-server branch from 496df50 to 4020dfa Compare September 18, 2017 21:42

gyuho changed the title *: configure server keepalive *: configure server keepalive, test watch keepalive Sep 18, 2017

gyuho force-pushed the keepalive-server branch 4 times, most recently from aeea06b to bfea25b Compare September 19, 2017 02:11

gyuho removed the WIP label Sep 27, 2017

gyuho force-pushed the keepalive-server branch from bfea25b to 6df878a Compare September 27, 2017 21:32

etcd-io deleted a comment from codecov-io Sep 27, 2017

gyuho force-pushed the keepalive-server branch 2 times, most recently from e41d020 to 47ae89e Compare September 27, 2017 23:21

xiang90 reviewed Sep 28, 2017

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gyuho force-pushed the keepalive-server branch from 47ae89e to 955f1a1 Compare September 28, 2017 17:05

gyuho changed the title *: configure server keepalive, test watch keepalive *: configure server keepalive, test client watch keepalive Sep 28, 2017

gyuho force-pushed the keepalive-server branch from 955f1a1 to 75c1d4d Compare September 28, 2017 17:32

gyuho changed the title *: configure server keepalive, test client watch keepalive *: configure server keepalive Sep 28, 2017

gyuho force-pushed the keepalive-server branch from 75c1d4d to 3f51072 Compare September 28, 2017 17:39

api/rpc: accept grpc.ServerOption's for keepalive policy

32e15d7

Signed-off-by: Gyu-Ho Lee <[email protected]>

gyuho force-pushed the keepalive-server branch from 3f51072 to d3d7bb3 Compare September 28, 2017 17:57

gyuho added the WIP label Sep 28, 2017

gyuho force-pushed the keepalive-server branch from d3d7bb3 to 72d7693 Compare September 28, 2017 18:08

embed: define keepalive server options

157c8ec

Signed-off-by: Gyu-Ho Lee <[email protected]>

gyuho force-pushed the keepalive-server branch from 72d7693 to 7c8fa01 Compare September 28, 2017 18:22

etcdmain: add 'grpc-keepalive-*' flags

4b3d400

Signed-off-by: Gyu-Ho Lee <[email protected]>

gyuho force-pushed the keepalive-server branch from 7c8fa01 to 4b3d400 Compare September 28, 2017 18:24

gyuho removed the WIP label Sep 28, 2017

xiang90 reviewed Sep 28, 2017

View reviewed changes

gyuho merged commit 10202a5 into etcd-io:master Sep 28, 2017

gyuho deleted the keepalive-server branch September 28, 2017 20:26

gyuho mentioned this pull request Oct 4, 2017

grpc keepalive: test server-to-client HTTP/2 pings #8645

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*: configure server keepalive #8535

*: configure server keepalive #8535

gyuho commented Sep 9, 2017 •

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xiang90 commented Sep 28, 2017

*: configure server keepalive #8535

*: configure server keepalive #8535

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gyuho commented Sep 9, 2017 • edited Loading

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xiang90 commented Sep 28, 2017

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gyuho commented Sep 23, 2017 •

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