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tcp_keepalive.go
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tcp_keepalive.go
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// Copyright Project Contour 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 v3
import (
envoy_core_v3 "github.com/envoyproxy/go-control-plane/envoy/config/core/v3"
"github.com/projectcontour/contour/internal/envoy"
)
func TCPKeepaliveSocketOptions() []*envoy_core_v3.SocketOption {
// Note: TCP_KEEPIDLE + (TCP_KEEPINTVL * TCP_KEEPCNT) must be greater than
// the grpc.KeepaliveParams time + timeout (currently 60 + 20 = 80 seconds)
// otherwise TestGRPC/StreamClusters fails.
return []*envoy_core_v3.SocketOption{
// Enable TCP keep-alive.
{
Description: "Enable TCP keep-alive",
Level: envoy.SOL_SOCKET,
Name: envoy.SO_KEEPALIVE,
Value: &envoy_core_v3.SocketOption_IntValue{IntValue: 1},
State: envoy_core_v3.SocketOption_STATE_LISTENING,
},
// The time (in seconds) the connection needs to remain idle
// before TCP starts sending keepalive probes.
{
Description: "TCP keep-alive initial idle time",
Level: envoy.IPPROTO_TCP,
Name: envoy.TCP_KEEPIDLE,
Value: &envoy_core_v3.SocketOption_IntValue{IntValue: 45},
State: envoy_core_v3.SocketOption_STATE_LISTENING,
},
// The time (in seconds) between individual keepalive probes.
{
Description: "TCP keep-alive time between probes",
Level: envoy.IPPROTO_TCP,
Name: envoy.TCP_KEEPINTVL,
Value: &envoy_core_v3.SocketOption_IntValue{IntValue: 5},
State: envoy_core_v3.SocketOption_STATE_LISTENING,
},
// The maximum number of TCP keep-alive probes to send before
// giving up and killing the connection if no response is
// obtained from the other end.
{
Description: "TCP keep-alive probe count",
Level: envoy.IPPROTO_TCP,
Name: envoy.TCP_KEEPCNT,
Value: &envoy_core_v3.SocketOption_IntValue{IntValue: 9},
State: envoy_core_v3.SocketOption_STATE_LISTENING,
},
}
}