github.com/lmb/consul@v1.4.1/lib/serf.go (about)

     1  package lib
     2  
     3  import (
     4  	"github.com/hashicorp/serf/serf"
     5  	"time"
     6  )
     7  
     8  // SerfDefaultConfig returns a Consul-flavored Serf default configuration,
     9  // suitable as a basis for a LAN, WAN, segment, or area.
    10  func SerfDefaultConfig() *serf.Config {
    11  	base := serf.DefaultConfig()
    12  
    13  	// This effectively disables the annoying queue depth warnings.
    14  	base.QueueDepthWarning = 1000000
    15  
    16  	// This enables dynamic sizing of the message queue depth based on the
    17  	// cluster size.
    18  	base.MinQueueDepth = 4096
    19  
    20  	// This gives leaves some time to propagate through the cluster before
    21  	// we shut down. The value was chosen to be reasonably short, but to
    22  	// allow a leave to get to over 99.99% of the cluster with 100k nodes
    23  	// (using https://www.serf.io/docs/internals/simulator.html).
    24  	base.LeavePropagateDelay = 3 * time.Second
    25  
    26  	return base
    27  }
    28  
    29  func GetSerfTags(serf *serf.Serf) map[string]string {
    30  	tags := make(map[string]string)
    31  	for tag, value := range serf.LocalMember().Tags {
    32  		tags[tag] = value
    33  	}
    34  
    35  	return tags
    36  }
    37  
    38  func UpdateSerfTag(serf *serf.Serf, tag, value string) {
    39  	tags := GetSerfTags(serf)
    40  	tags[tag] = value
    41  
    42  	serf.SetTags(tags)
    43  }