mirror of https://github.com/hashicorp/consul
86 lines
2.0 KiB
Go
86 lines
2.0 KiB
Go
// Copyright (c) HashiCorp, Inc.
|
|
// SPDX-License-Identifier: BUSL-1.1
|
|
|
|
package libserf
|
|
|
|
import (
|
|
"time"
|
|
|
|
"github.com/hashicorp/go-hclog"
|
|
"github.com/hashicorp/serf/serf"
|
|
)
|
|
|
|
const (
|
|
ReconnectTimeoutTag = "rc_tm"
|
|
)
|
|
|
|
// DefaultConfig returns a Consul-flavored Serf default configuration,
|
|
// suitable as a basis for a LAN, WAN, segment, or area.
|
|
func DefaultConfig() *serf.Config {
|
|
base := serf.DefaultConfig()
|
|
|
|
// This effectively disables the annoying queue depth warnings.
|
|
base.QueueDepthWarning = 1000000
|
|
|
|
// This enables dynamic sizing of the message queue depth based on the
|
|
// cluster size.
|
|
base.MinQueueDepth = 4096
|
|
|
|
// This gives leaves some time to propagate through the cluster before
|
|
// we shut down. The value was chosen to be reasonably short, but to
|
|
// allow a leave to get to over 99.99% of the cluster with 100k nodes
|
|
// (using https://github.com/hashicorp/serf/blob/master/docs/internals/simulator.html.erb).
|
|
base.LeavePropagateDelay = 3 * time.Second
|
|
|
|
return base
|
|
}
|
|
|
|
func GetTags(serf *serf.Serf) map[string]string {
|
|
tags := make(map[string]string)
|
|
for tag, value := range serf.LocalMember().Tags {
|
|
tags[tag] = value
|
|
}
|
|
|
|
return tags
|
|
}
|
|
|
|
func UpdateTag(serf *serf.Serf, tag, value string) {
|
|
tags := GetTags(serf)
|
|
tags[tag] = value
|
|
|
|
serf.SetTags(tags)
|
|
}
|
|
|
|
type ReconnectOverride struct {
|
|
logger hclog.Logger
|
|
}
|
|
|
|
func NewReconnectOverride(logger hclog.Logger) *ReconnectOverride {
|
|
if logger == nil {
|
|
logger = hclog.Default()
|
|
}
|
|
|
|
return &ReconnectOverride{
|
|
logger: logger,
|
|
}
|
|
}
|
|
|
|
func (r *ReconnectOverride) ReconnectTimeout(m *serf.Member, timeout time.Duration) time.Duration {
|
|
val, ok := m.Tags[ReconnectTimeoutTag]
|
|
if !ok {
|
|
return timeout
|
|
}
|
|
newTimeout, err := time.ParseDuration(val)
|
|
if err != nil {
|
|
r.logger.Warn("Member is advertising a malformed reconnect timeout", "member", m.Name, "rc_tm", val)
|
|
return timeout
|
|
}
|
|
|
|
// ignore a timeout of 0 as that indicates the default should be used
|
|
if newTimeout == 0 {
|
|
return timeout
|
|
}
|
|
|
|
return newTimeout
|
|
}
|