mirror of https://github.com/docker/cli.git
100 lines
4.4 KiB
Go
100 lines
4.4 KiB
Go
/*
|
|
*
|
|
* Copyright 2017 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 keepalive defines configurable parameters for point-to-point
|
|
// healthcheck.
|
|
package keepalive
|
|
|
|
import (
|
|
"time"
|
|
)
|
|
|
|
// ClientParameters is used to set keepalive parameters on the client-side.
|
|
// These configure how the client will actively probe to notice when a
|
|
// connection is broken and send pings so intermediaries will be aware of the
|
|
// liveness of the connection. Make sure these parameters are set in
|
|
// coordination with the keepalive policy on the server, as incompatible
|
|
// settings can result in closing of connection.
|
|
type ClientParameters struct {
|
|
// After a duration of this time if the client doesn't see any activity it
|
|
// pings the server to see if the transport is still alive.
|
|
// If set below 10s, a minimum value of 10s will be used instead.
|
|
//
|
|
// Note that gRPC servers have a default EnforcementPolicy.MinTime of 5
|
|
// minutes (which means the client shouldn't ping more frequently than every
|
|
// 5 minutes).
|
|
//
|
|
// Though not ideal, it's not a strong requirement for Time to be less than
|
|
// EnforcementPolicy.MinTime. Time will automatically double if the server
|
|
// disconnects due to its enforcement policy.
|
|
//
|
|
// For more details, see
|
|
// https://github.com/grpc/proposal/blob/master/A8-client-side-keepalive.md
|
|
Time time.Duration
|
|
// After having pinged for keepalive check, the client waits for a duration
|
|
// of Timeout and if no activity is seen even after that the connection is
|
|
// closed.
|
|
//
|
|
// If keepalive is enabled, and this value is not explicitly set, the default
|
|
// is 20 seconds.
|
|
Timeout time.Duration
|
|
// If true, client sends keepalive pings even with no active RPCs. If false,
|
|
// when there are no active RPCs, Time and Timeout will be ignored and no
|
|
// keepalive pings will be sent.
|
|
PermitWithoutStream bool
|
|
}
|
|
|
|
// ServerParameters is used to set keepalive and max-age parameters on the
|
|
// server-side.
|
|
type ServerParameters struct {
|
|
// MaxConnectionIdle is a duration for the amount of time after which an
|
|
// idle connection would be closed by sending a GoAway. Idleness duration is
|
|
// defined since the most recent time the number of outstanding RPCs became
|
|
// zero or the connection establishment.
|
|
MaxConnectionIdle time.Duration // The current default value is infinity.
|
|
// MaxConnectionAge is a duration for the maximum amount of time a
|
|
// connection may exist before it will be closed by sending a GoAway. A
|
|
// random jitter of +/-10% will be added to MaxConnectionAge to spread out
|
|
// connection storms.
|
|
MaxConnectionAge time.Duration // The current default value is infinity.
|
|
// MaxConnectionAgeGrace is an additive period after MaxConnectionAge after
|
|
// which the connection will be forcibly closed.
|
|
MaxConnectionAgeGrace time.Duration // The current default value is infinity.
|
|
// After a duration of this time if the server doesn't see any activity it
|
|
// pings the client to see if the transport is still alive.
|
|
// If set below 1s, a minimum value of 1s will be used instead.
|
|
Time time.Duration // The current default value is 2 hours.
|
|
// After having pinged for keepalive check, the server waits for a duration
|
|
// of Timeout and if no activity is seen even after that the connection is
|
|
// closed.
|
|
Timeout time.Duration // The current default value is 20 seconds.
|
|
}
|
|
|
|
// EnforcementPolicy is used to set keepalive enforcement policy on the
|
|
// server-side. Server will close connection with a client that violates this
|
|
// policy.
|
|
type EnforcementPolicy struct {
|
|
// MinTime is the minimum amount of time a client should wait before sending
|
|
// a keepalive ping.
|
|
MinTime time.Duration // The current default value is 5 minutes.
|
|
// If true, server allows keepalive pings even when there are no active
|
|
// streams(RPCs). If false, and client sends ping when there are no active
|
|
// streams, server will send GOAWAY and close the connection.
|
|
PermitWithoutStream bool // false by default.
|
|
}
|