open-consul/lib/serf.go

44 lines
1.1 KiB
Go

package lib
import (
"github.com/hashicorp/serf/serf"
"time"
)
// SerfDefaultConfig returns a Consul-flavored Serf default configuration,
// suitable as a basis for a LAN, WAN, segment, or area.
func SerfDefaultConfig() *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://www.serf.io/docs/internals/simulator.html).
base.LeavePropagateDelay = 3 * time.Second
return base
}
func GetSerfTags(serf *serf.Serf) map[string]string {
tags := make(map[string]string)
for tag, value := range serf.LocalMember().Tags {
tags[tag] = value
}
return tags
}
func UpdateSerfTag(serf *serf.Serf, tag, value string) {
tags := GetSerfTags(serf)
tags[tag] = value
serf.SetTags(tags)
}